* Re: [PATCH 01/16] dt-bindings: arm: renesas: Document Renesas RZ/V2L SoC
From: Geert Uytterhoeven @ 2022-01-21 14:43 UTC (permalink / raw)
To: Lad Prabhakar
Cc: Magnus Damm, Rob Herring, Michael Turquette, Stephen Boyd,
Vinod Koul, Sergey Shtylyov, David S. Miller, Jakub Kicinski,
Linus Walleij, Greg Kroah-Hartman, Biju Das, Linux-Renesas,
open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS,
Linux Kernel Mailing List, linux-clk, dmaengine, netdev,
open list:GPIO SUBSYSTEM, open list:SERIAL DRIVERS, Prabhakar
In-Reply-To: <20211221094717.16187-2-prabhakar.mahadev-lad.rj@bp.renesas.com>
On Tue, Dec 21, 2021 at 10:47 AM Lad Prabhakar
<prabhakar.mahadev-lad.rj@bp.renesas.com> wrote:
> From: Biju Das <biju.das.jz@bp.renesas.com>
>
> Document Renesas RZ/V2L SoC.
>
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-devel for v5.18.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply
* [PATCH v6 14/14] media: dt-bindings: Convert Cadence CSI2RX binding to YAML
From: Pratyush Yadav @ 2022-01-21 14:29 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
In-Reply-To: <20220121142904.4091481-1-p.yadav@ti.com>
Convert the Cadence CSI2RX binding to use YAML schema.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
(no changes since v5)
Changes in v5:
- Move clock description in comments under the clocks property.
- Make ports required.
- Add Rob's and Laurent's R-by.
Changes in v4:
- Add power-domains property.
- Drop maxItems from clock-names.
- Drop the type for data-lanes.
- Drop uniqueItems from data-lanes. Move it to video-interfaces.yaml
instead.
Changes in v3:
- Add compatible: contains: const: cdns,csi2rx to allow SoC specific
compatible.
- Add more constraints for data-lanes property.
Changes in v2:
- New in v2.
.../devicetree/bindings/media/cdns,csi2rx.txt | 100 ----------
.../bindings/media/cdns,csi2rx.yaml | 176 ++++++++++++++++++
2 files changed, 176 insertions(+), 100 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/media/cdns,csi2rx.txt
create mode 100644 Documentation/devicetree/bindings/media/cdns,csi2rx.yaml
diff --git a/Documentation/devicetree/bindings/media/cdns,csi2rx.txt b/Documentation/devicetree/bindings/media/cdns,csi2rx.txt
deleted file mode 100644
index 6b02a0657ad9..000000000000
--- a/Documentation/devicetree/bindings/media/cdns,csi2rx.txt
+++ /dev/null
@@ -1,100 +0,0 @@
-Cadence MIPI-CSI2 RX controller
-===============================
-
-The Cadence MIPI-CSI2 RX controller is a CSI-2 bridge supporting up to 4 CSI
-lanes in input, and 4 different pixel streams in output.
-
-Required properties:
- - compatible: must be set to "cdns,csi2rx" and an SoC-specific compatible
- - reg: base address and size of the memory mapped region
- - clocks: phandles to the clocks driving the controller
- - clock-names: must contain:
- * sys_clk: main clock
- * p_clk: register bank clock
- * pixel_if[0-3]_clk: pixel stream output clock, one for each stream
- implemented in hardware, between 0 and 3
-
-Optional properties:
- - phys: phandle to the external D-PHY, phy-names must be provided
- - phy-names: must contain "dphy", if the implementation uses an
- external D-PHY
-
-Required subnodes:
- - ports: A ports node with one port child node per device input and output
- port, in accordance with the video interface bindings defined in
- Documentation/devicetree/bindings/media/video-interfaces.txt. The
- port nodes are numbered as follows:
-
- Port Description
- -----------------------------
- 0 CSI-2 input
- 1 Stream 0 output
- 2 Stream 1 output
- 3 Stream 2 output
- 4 Stream 3 output
-
- The stream output port nodes are optional if they are not
- connected to anything at the hardware level or implemented
- in the design.Since there is only one endpoint per port,
- the endpoints are not numbered.
-
-
-Example:
-
-csi2rx: csi-bridge@0d060000 {
- compatible = "cdns,csi2rx";
- reg = <0x0d060000 0x1000>;
- clocks = <&byteclock>, <&byteclock>
- <&coreclock>, <&coreclock>,
- <&coreclock>, <&coreclock>;
- clock-names = "sys_clk", "p_clk",
- "pixel_if0_clk", "pixel_if1_clk",
- "pixel_if2_clk", "pixel_if3_clk";
-
- ports {
- #address-cells = <1>;
- #size-cells = <0>;
-
- port@0 {
- reg = <0>;
-
- csi2rx_in_sensor: endpoint {
- remote-endpoint = <&sensor_out_csi2rx>;
- clock-lanes = <0>;
- data-lanes = <1 2>;
- };
- };
-
- port@1 {
- reg = <1>;
-
- csi2rx_out_grabber0: endpoint {
- remote-endpoint = <&grabber0_in_csi2rx>;
- };
- };
-
- port@2 {
- reg = <2>;
-
- csi2rx_out_grabber1: endpoint {
- remote-endpoint = <&grabber1_in_csi2rx>;
- };
- };
-
- port@3 {
- reg = <3>;
-
- csi2rx_out_grabber2: endpoint {
- remote-endpoint = <&grabber2_in_csi2rx>;
- };
- };
-
- port@4 {
- reg = <4>;
-
- csi2rx_out_grabber3: endpoint {
- remote-endpoint = <&grabber3_in_csi2rx>;
- };
- };
- };
-};
diff --git a/Documentation/devicetree/bindings/media/cdns,csi2rx.yaml b/Documentation/devicetree/bindings/media/cdns,csi2rx.yaml
new file mode 100644
index 000000000000..399fe619377d
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/cdns,csi2rx.yaml
@@ -0,0 +1,176 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/cdns,csi2rx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cadence MIPI-CSI2 RX controller
+
+description: |
+ The Cadence MIPI-CSI2 RX controller is a CSI-2 bridge supporting up to 4 CSI
+ lanes in input, and 4 different pixel streams in output.
+
+maintainers:
+ - Pratyush Yadav <p.yadav@ti.com>
+
+properties:
+ compatible:
+ contains:
+ const: cdns,csi2rx
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ minItems: 3
+ items:
+ - description: Main clock
+ - description: Register bank clock
+ - description: Pixel stream 0 output clock
+ - description: Pixel stream 1 output clock
+ - description: Pixel stream 2 output clock
+ - description: Pixel stream 3 output clock
+
+ clock-names:
+ minItems: 3
+ items:
+ - const: sys_clk
+ - const: p_clk
+ - const: pixel_if0_clk
+ - const: pixel_if1_clk
+ - const: pixel_if2_clk
+ - const: pixel_if3_clk
+
+ phys:
+ maxItems: 1
+ description: phandle to the external D-PHY
+
+ phy-names:
+ items:
+ - const: dphy
+
+ power-domains:
+ maxItems: 1
+
+ ports:
+ $ref: /schemas/graph.yaml#/properties/ports
+
+ properties:
+ port@0:
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
+ description: CSI-2 input
+
+ properties:
+ endpoint:
+ $ref: video-interfaces.yaml#
+ unevaluatedProperties: false
+
+ properties:
+ clock-lanes:
+ maxItems: 1
+
+ data-lanes:
+ minItems: 1
+ maxItems: 4
+ items:
+ maximum: 4
+
+ required:
+ - clock-lanes
+ - data-lanes
+
+ port@1:
+ $ref: /schemas/graph.yaml#/properties/port
+ description: Stream 0 output
+
+ port@2:
+ $ref: /schemas/graph.yaml#/properties/port
+ description: Stream 1 output
+
+ port@3:
+ $ref: /schemas/graph.yaml#/properties/port
+ description: Stream 2 output
+
+ port@4:
+ $ref: /schemas/graph.yaml#/properties/port
+ description: Stream 3 output
+
+ required:
+ - port@0
+
+
+dependencies:
+ phys: [ 'phy-names' ]
+ phy-names: [ 'phys' ]
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - ports
+
+additionalProperties: false
+
+examples:
+ - |
+ csi2rx: csi-bridge@d060000 {
+ compatible = "cdns,csi2rx";
+ reg = <0x0d060000 0x1000>;
+ clocks = <&byteclock>, <&byteclock>,
+ <&coreclock>, <&coreclock>,
+ <&coreclock>, <&coreclock>;
+ clock-names = "sys_clk", "p_clk",
+ "pixel_if0_clk", "pixel_if1_clk",
+ "pixel_if2_clk", "pixel_if3_clk";
+ phys = <&dphy0>;
+ phy-names = "dphy";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ csi2rx_in_sensor: endpoint {
+ remote-endpoint = <&sensor_out_csi2rx>;
+ clock-lanes = <0>;
+ data-lanes = <1 2>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+
+ csi2rx_out_grabber0: endpoint {
+ remote-endpoint = <&grabber0_in_csi2rx>;
+ };
+ };
+
+ port@2 {
+ reg = <2>;
+
+ csi2rx_out_grabber1: endpoint {
+ remote-endpoint = <&grabber1_in_csi2rx>;
+ };
+ };
+
+ port@3 {
+ reg = <3>;
+
+ csi2rx_out_grabber2: endpoint {
+ remote-endpoint = <&grabber2_in_csi2rx>;
+ };
+ };
+
+ port@4 {
+ reg = <4>;
+
+ csi2rx_out_grabber3: endpoint {
+ remote-endpoint = <&grabber3_in_csi2rx>;
+ };
+ };
+ };
+ };
--
2.34.1
^ permalink raw reply related
* [PATCH v6 13/14] media: dt-bindings: Add DT bindings for TI J721E CSI2RX driver
From: Pratyush Yadav @ 2022-01-21 14:29 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
In-Reply-To: <20220121142904.4091481-1-p.yadav@ti.com>
TI's J721E uses the Cadence CSI2RX and DPHY peripherals to facilitate
capture over a CSI-2 bus. The TI CSI2RX platform driver glues all the
parts together.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
(no changes since v5)
Changes in v5:
- Add Laurent's and Rob's R-by.
Changes in v2:
- Rename to ti,j721e-csi2rx.yaml
- Add an entry in MAINTAINERS.
- Add a description for the binding.
- Change compatible to ti,j721e-csi2rx to make it SoC specific.
- Remove description from dmas, reg, power-domains.
- Remove a limit of 2 from #address-cells and #size-cells.
- Fix add ^ to csi-bridge subnode regex.
- Make ranges mandatory.
- Add unit address in example.
- Add a reference to cdns,csi2rx in csi-bridge subnode.
- Expand the example to include the csi-bridge subnode as well.
- Re-order subject prefixes.
.../bindings/media/ti,j721e-csi2rx.yaml | 101 ++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 102 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/ti,j721e-csi2rx.yaml
diff --git a/Documentation/devicetree/bindings/media/ti,j721e-csi2rx.yaml b/Documentation/devicetree/bindings/media/ti,j721e-csi2rx.yaml
new file mode 100644
index 000000000000..db87cfd65bed
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/ti,j721e-csi2rx.yaml
@@ -0,0 +1,101 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/ti,j721e-csi2rx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI J721E CSI2RX Wrapper Device Tree Bindings
+
+description: |
+ The TI J721E CSI2RX Wrapper is a wrapper around Cadence CSI2RX bridge that
+ enables sending captured frames to memory over PSI-L DMA. In the J721E
+ Technical Reference Manual (SPRUIL1B) it is referred to as "SHIM" under the
+ CSI_RX_IF section.
+
+maintainers:
+ - Pratyush Yadav <p.yadav@ti.com>
+
+properties:
+ compatible:
+ items:
+ - const: ti,j721e-csi2rx
+
+ dmas:
+ maxItems: 1
+
+ dma-names:
+ items:
+ - const: rx0
+
+ reg:
+ maxItems: 1
+
+ power-domains:
+ maxItems: 1
+
+ ranges: true
+
+ "#address-cells": true
+
+ "#size-cells": true
+
+patternProperties:
+ "^csi-bridge@":
+ type: object
+ description: CSI2 bridge node.
+ $ref: cdns,csi2rx.yaml#
+
+required:
+ - compatible
+ - reg
+ - dmas
+ - dma-names
+ - power-domains
+ - ranges
+ - "#address-cells"
+ - "#size-cells"
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/soc/ti,sci_pm_domain.h>
+
+ ti_csi2rx0: ticsi2rx@4500000 {
+ compatible = "ti,j721e-csi2rx";
+ dmas = <&main_udmap 0x4940>;
+ dma-names = "rx0";
+ reg = <0x4500000 0x1000>;
+ power-domains = <&k3_pds 26 TI_SCI_PD_EXCLUSIVE>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ cdns_csi2rx: csi-bridge@4504000 {
+ compatible = "cdns,csi2rx";
+ reg = <0x4504000 0x1000>;
+ clocks = <&k3_clks 26 2>, <&k3_clks 26 0>, <&k3_clks 26 2>,
+ <&k3_clks 26 2>, <&k3_clks 26 3>, <&k3_clks 26 3>;
+ clock-names = "sys_clk", "p_clk", "pixel_if0_clk",
+ "pixel_if1_clk", "pixel_if2_clk", "pixel_if3_clk";
+ phys = <&dphy0>;
+ phy-names = "dphy";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ csi2_0: port@0 {
+
+ reg = <0>;
+
+ csi2rx0_in_sensor: endpoint {
+ remote-endpoint = <&csi2_cam0>;
+ bus-type = <4>; /* CSI2 DPHY. */
+ clock-lanes = <0>;
+ data-lanes = <1 2>;
+ };
+ };
+ };
+ };
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 2a8ebf17462e..446bc3146093 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19185,6 +19185,7 @@ TI J721E CSI2RX DRIVER
M: Pratyush Yadav <p.yadav@ti.com>
L: linux-media@vger.kernel.org
S: Supported
+F: Documentation/devicetree/bindings/media/ti,j721e-csi2rx.yaml
F: drivers/media/platform/ti/j721e-csi2rx/
TI DAVINCI MACHINE SUPPORT
--
2.34.1
^ permalink raw reply related
* [PATCH v6 09/14] media: cadence: csi2rx: Add link validation
From: Pratyush Yadav @ 2022-01-21 14:28 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
In-Reply-To: <20220121142904.4091481-1-p.yadav@ti.com>
Add media link validation to make sure incorrectly configured pipelines
are caught.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
Changes in v6:
- Drop transcoding from the commit message.
- Make csi2rx_media_ops const.
- Add Laurent's R-by.
Changes in v5:
- New in v5.
drivers/media/platform/cadence/cdns-csi2rx.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
index 28fb2078d10d..08866bc64c33 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -479,6 +479,10 @@ static const struct v4l2_subdev_ops csi2rx_subdev_ops = {
.pad = &csi2rx_pad_ops,
};
+static const struct media_entity_operations csi2rx_media_ops = {
+ .link_validate = v4l2_subdev_link_validate,
+};
+
static int csi2rx_async_bound(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *s_subdev,
struct v4l2_async_subdev *asd)
@@ -678,6 +682,7 @@ static int csi2rx_probe(struct platform_device *pdev)
for (i = CSI2RX_PAD_SOURCE_STREAM0; i < CSI2RX_PAD_MAX; i++)
csi2rx->pads[i].flags = MEDIA_PAD_FL_SOURCE;
csi2rx->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ csi2rx->subdev.entity.ops = &csi2rx_media_ops;
ret = media_entity_pads_init(&csi2rx->subdev.entity, CSI2RX_PAD_MAX,
csi2rx->pads);
--
2.34.1
^ permalink raw reply related
* [PATCH v6 11/14] media: ti: Add CSI2RX support for J721E
From: Pratyush Yadav @ 2022-01-21 14:29 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
In-Reply-To: <20220121142904.4091481-1-p.yadav@ti.com>
TI's J721E uses the Cadence CSI2RX and DPHY peripherals to facilitate
capture over a CSI-2 bus.
The Cadence CSI2RX IP acts as a bridge between the TI specific parts and
the CSI-2 protocol parts. TI then has a wrapper on top of this bridge
called the SHIM layer. It takes in data from stream 0, repacks it, and
sends it to memory over PSI-L DMA.
This driver acts as the "front end" to V4L2 client applications. It
implements the required ioctls and buffer operations, passes the
necessary calls on to the bridge, programs the SHIM layer, and performs
DMA via the dmaengine API to finally return the data to a buffer
supplied by the application.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
---
(no changes since v5)
Changes in v5:
- Add dependency on PHY_CADENCE_DPHY_RX instead of PHY_CADENCE_DPHY
since the Rx mode DPHY now has a separate driver.
- Drop ti_csi2rx_validate_pipeline(). Pipeline validation should be done
at media_pipeline_start().
- Do not assign flags.
- Fix error handling in ti_csi2rx_start_streaming(). Free up vb2 buffers
when media_pipeline_start() fails.
Changes in v4:
- Acquire the media device's graph_mutex before starting the graph walk.
- Call media_graph_walk_init() and media_graph_walk_cleanup() when
starting and ending the graph walk respectively.
- Reduce max frame height and width in enum_framesizes. Currently they
are set to UINT_MAX but they must be a multiple of step_width, so they
need to be rounded down. Also, these values are absurdly large which
causes some userspace applications like gstreamer to trip up. While it
is not generally right to change the kernel for an application bug, it
is not such a big deal here. This change is replacing one set of
absurdly large arbitrary values with another set of smaller but still
absurdly large arbitrary values. Both limits are unlikely to be hit in
practice.
Changes in v3:
- Move DMA related fields in struct ti_csi2rx_dma.
- Protect DMA buffer queue with a spinlock to make sure the queue buffer
and DMA callback don't race on it.
- Track the current DMA state. It might go idle because of a lack of
buffers. This state can be used to restart it if needed.
- Do not include the current buffer in the pending queue. It is slightly
better modelling than leaving it at the head of the pending queue.
- Use the buffer as the callback argument, and add a reference to csi in it.
- If queueing a buffer to DMA fails, the buffer gets leaked and DMA gets
stalled with. Instead, report the error to vb2 and queue the next
buffer in the pending queue.
- DMA gets stalled if we run out of buffers since the callback is the
only one that fires subsequent transfers and it is no longer being
called. Check for that when queueing buffers and restart DMA if
needed.
- Do not put of node until we are done using the fwnode.
- Set inital format to UYVY 640x480.
Changes in v2:
- Use dmaengine_get_dma_device() instead of directly accessing
dma->device->dev.
- Do not set dst_addr_width when configuring slave DMA.
- Move to a separate subdir and rename to j721e-csi2rx.c
- Convert compatible to ti,j721e-csi2rx.
- Move to use Media Controller centric APIs.
- Improve cleanup in probe when one of the steps fails.
- Add colorspace to formats database.
- Set hw_revision on media_device.
- Move video device initialization to probe time instead of register time.
MAINTAINERS | 6 +
drivers/media/platform/Kconfig | 12 +
drivers/media/platform/ti/Makefile | 1 +
.../media/platform/ti/j721e-csi2rx/Makefile | 2 +
.../platform/ti/j721e-csi2rx/j721e-csi2rx.c | 913 ++++++++++++++++++
5 files changed, 934 insertions(+)
create mode 100644 drivers/media/platform/ti/j721e-csi2rx/Makefile
create mode 100644 drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 3b8fa4e5047f..2a8ebf17462e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19181,6 +19181,12 @@ S: Odd Fixes
F: drivers/clk/ti/
F: include/linux/clk/ti.h
+TI J721E CSI2RX DRIVER
+M: Pratyush Yadav <p.yadav@ti.com>
+L: linux-media@vger.kernel.org
+S: Supported
+F: drivers/media/platform/ti/j721e-csi2rx/
+
TI DAVINCI MACHINE SUPPORT
M: Sekhar Nori <nsekhar@ti.com>
R: Bartosz Golaszewski <brgl@bgdev.pl>
diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index 9fbdba0fd1e7..0fa58563d93b 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -216,6 +216,18 @@ config VIDEO_RCAR_ISP
To compile this driver as a module, choose M here: the
module will be called rcar-isp.
+config VIDEO_TI_J721E_CSI2RX
+ tristate "TI J721E CSI2RX wrapper layer driver"
+ depends on VIDEO_DEV && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+ depends on MEDIA_SUPPORT && MEDIA_CONTROLLER
+ depends on PHY_CADENCE_DPHY_RX && VIDEO_CADENCE_CSI2RX
+ depends on ARCH_K3 || COMPILE_TEST
+ select VIDEOBUF2_DMA_CONTIG
+ select V4L2_FWNODE
+ help
+ Support for TI CSI2RX wrapper layer. This just enables the wrapper driver.
+ The Cadence CSI2RX bridge driver needs to be enabled separately.
+
endif # V4L_PLATFORM_DRIVERS
menuconfig V4L_MEM2MEM_DRIVERS
diff --git a/drivers/media/platform/ti/Makefile b/drivers/media/platform/ti/Makefile
index bbc737ccbbea..17c9cfb74f66 100644
--- a/drivers/media/platform/ti/Makefile
+++ b/drivers/media/platform/ti/Makefile
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
obj-y += cal/
obj-y += vpe/
+obj-y += j721e-csi2rx/
diff --git a/drivers/media/platform/ti/j721e-csi2rx/Makefile b/drivers/media/platform/ti/j721e-csi2rx/Makefile
new file mode 100644
index 000000000000..377afc1d6280
--- /dev/null
+++ b/drivers/media/platform/ti/j721e-csi2rx/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_VIDEO_TI_J721E_CSI2RX) += j721e-csi2rx.o
diff --git a/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c b/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c
new file mode 100644
index 000000000000..43f31f161f43
--- /dev/null
+++ b/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c
@@ -0,0 +1,913 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * TI CSI2 RX driver.
+ *
+ * Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com/
+ *
+ * Author: Pratyush Yadav <p.yadav@ti.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/dmaengine.h>
+#include <linux/of_platform.h>
+
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-dma-contig.h>
+
+#define TI_CSI2RX_MODULE_NAME "j721e-csi2rx"
+
+#define SHIM_CNTL 0x10
+#define SHIM_CNTL_PIX_RST BIT(0)
+
+#define SHIM_DMACNTX 0x20
+#define SHIM_DMACNTX_EN BIT(31)
+#define SHIM_DMACNTX_YUV422 GENMASK(27, 26)
+#define SHIM_DMACNTX_FMT GENMASK(5, 0)
+#define SHIM_DMACNTX_UYVY 0
+#define SHIM_DMACNTX_VYUY 1
+#define SHIM_DMACNTX_YUYV 2
+#define SHIM_DMACNTX_YVYU 3
+
+#define SHIM_PSI_CFG0 0x24
+#define SHIM_PSI_CFG0_SRC_TAG GENMASK(15, 0)
+#define SHIM_PSI_CFG0_DST_TAG GENMASK(31, 15)
+
+#define CSI_DF_YUV420 0x18
+#define CSI_DF_YUV422 0x1e
+#define CSI_DF_RGB444 0x20
+#define CSI_DF_RGB888 0x24
+
+#define PSIL_WORD_SIZE_BYTES 16
+/*
+ * There are no hard limits on the width or height. The DMA engine can handle
+ * all sizes. The max width and height are arbitrary numbers for this driver.
+ * Use 16M * 16M as the arbitrary limit. It is large enough that it is unlikely
+ * the limit will be hit in practice.
+ */
+#define MAX_WIDTH_BYTES SZ_16M
+#define MAX_HEIGHT_BYTES SZ_16M
+
+struct ti_csi2rx_fmt {
+ u32 fourcc; /* Four character code. */
+ u32 code; /* Mbus code. */
+ enum v4l2_colorspace colorspace;
+ u32 csi_df; /* CSI Data format. */
+ u8 bpp; /* Bits per pixel. */
+};
+
+struct ti_csi2rx_buffer {
+ /* Common v4l2 buffer. Must be first. */
+ struct vb2_v4l2_buffer vb;
+ struct list_head list;
+ struct ti_csi2rx_dev *csi;
+};
+
+enum ti_csi2rx_dma_state {
+ TI_CSI2RX_DMA_STOPPED, /* Streaming not started yet. */
+ TI_CSI2RX_DMA_IDLE, /* Streaming but no pending DMA operation. */
+ TI_CSI2RX_DMA_ACTIVE, /* Streaming and pending DMA operation. */
+};
+
+struct ti_csi2rx_dma {
+ /* Protects all fields in this struct. */
+ spinlock_t lock;
+ struct dma_chan *chan;
+ /* Buffers queued to the driver, waiting to be processed by DMA. */
+ struct list_head queue;
+ enum ti_csi2rx_dma_state state;
+ /*
+ * Current buffer being processed by DMA. NULL if no buffer is being
+ * processed.
+ */
+ struct ti_csi2rx_buffer *curr;
+};
+
+struct ti_csi2rx_dev {
+ struct device *dev;
+ void __iomem *shim;
+ struct v4l2_device v4l2_dev;
+ struct video_device vdev;
+ struct media_device mdev;
+ struct media_pipeline pipe;
+ struct media_pad pad;
+ struct v4l2_async_notifier notifier;
+ struct v4l2_subdev *subdev;
+ struct vb2_queue vidq;
+ struct mutex mutex; /* To serialize ioctls. */
+ struct v4l2_format v_fmt;
+ struct ti_csi2rx_dma dma;
+ u32 sequence;
+};
+
+static const struct ti_csi2rx_fmt formats[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_YUYV,
+ .code = MEDIA_BUS_FMT_YUYV8_2X8,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .csi_df = CSI_DF_YUV422,
+ .bpp = 16,
+ }, {
+ .fourcc = V4L2_PIX_FMT_UYVY,
+ .code = MEDIA_BUS_FMT_UYVY8_2X8,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .csi_df = CSI_DF_YUV422,
+ .bpp = 16,
+ }, {
+ .fourcc = V4L2_PIX_FMT_YVYU,
+ .code = MEDIA_BUS_FMT_YVYU8_2X8,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .csi_df = CSI_DF_YUV422,
+ .bpp = 16,
+ }, {
+ .fourcc = V4L2_PIX_FMT_VYUY,
+ .code = MEDIA_BUS_FMT_VYUY8_2X8,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .csi_df = CSI_DF_YUV422,
+ .bpp = 16,
+ },
+
+ /* More formats can be supported but they are not listed for now. */
+};
+
+static const unsigned int num_formats = ARRAY_SIZE(formats);
+
+/* Forward declaration needed by ti_csi2rx_dma_callback. */
+static int ti_csi2rx_start_dma(struct ti_csi2rx_dev *csi,
+ struct ti_csi2rx_buffer *buf);
+
+static const struct ti_csi2rx_fmt *find_format_by_pix(u32 pixelformat)
+{
+ unsigned int i;
+
+ for (i = 0; i < num_formats; i++) {
+ if (formats[i].fourcc == pixelformat)
+ return &formats[i];
+ }
+
+ return NULL;
+}
+
+static void ti_csi2rx_fill_fmt(const struct ti_csi2rx_fmt *csi_fmt,
+ struct v4l2_format *v4l2_fmt)
+{
+ struct v4l2_pix_format *pix = &v4l2_fmt->fmt.pix;
+ u32 bpl;
+
+ v4l2_fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ pix->pixelformat = csi_fmt->fourcc;
+ pix->colorspace = csi_fmt->colorspace;
+ pix->sizeimage = pix->height * pix->width * (csi_fmt->bpp / 8);
+
+ bpl = (pix->width * ALIGN(csi_fmt->bpp, 8)) >> 3;
+ pix->bytesperline = ALIGN(bpl, 16);
+}
+
+static int ti_csi2rx_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct ti_csi2rx_dev *csi = video_drvdata(file);
+
+ strscpy(cap->driver, TI_CSI2RX_MODULE_NAME, sizeof(cap->driver));
+ strscpy(cap->card, TI_CSI2RX_MODULE_NAME, sizeof(cap->card));
+
+ snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
+ dev_name(csi->dev));
+
+ return 0;
+}
+
+static int ti_csi2rx_enum_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ if (f->index >= num_formats)
+ return -EINVAL;
+
+ memset(f->reserved, 0, sizeof(f->reserved));
+ f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ f->pixelformat = formats[f->index].fourcc;
+
+ return 0;
+}
+
+static int ti_csi2rx_g_fmt_vid_cap(struct file *file, void *prov,
+ struct v4l2_format *f)
+{
+ struct ti_csi2rx_dev *csi = video_drvdata(file);
+
+ *f = csi->v_fmt;
+
+ return 0;
+}
+
+static int ti_csi2rx_try_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ const struct ti_csi2rx_fmt *fmt;
+
+ /*
+ * Default to the first format if the requested pixel format code isn't
+ * supported.
+ */
+ fmt = find_format_by_pix(f->fmt.pix.pixelformat);
+ if (!fmt)
+ fmt = &formats[0];
+
+ if (f->fmt.pix.field == V4L2_FIELD_ANY)
+ f->fmt.pix.field = V4L2_FIELD_NONE;
+
+ if (f->fmt.pix.field != V4L2_FIELD_NONE)
+ return -EINVAL;
+
+ ti_csi2rx_fill_fmt(fmt, f);
+
+ return 0;
+}
+
+static int ti_csi2rx_s_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct ti_csi2rx_dev *csi = video_drvdata(file);
+ struct vb2_queue *q = &csi->vidq;
+ int ret;
+
+ if (vb2_is_busy(q))
+ return -EBUSY;
+
+ ret = ti_csi2rx_try_fmt_vid_cap(file, priv, f);
+ if (ret < 0)
+ return ret;
+
+ csi->v_fmt = *f;
+
+ return 0;
+}
+
+static int ti_csi2rx_enum_framesizes(struct file *file, void *fh,
+ struct v4l2_frmsizeenum *fsize)
+{
+ const struct ti_csi2rx_fmt *fmt;
+ unsigned int pixels_in_word;
+ u8 bpp;
+
+ fmt = find_format_by_pix(fsize->pixel_format);
+ if (!fmt)
+ return -EINVAL;
+
+ bpp = ALIGN(fmt->bpp, 8);
+
+ /*
+ * Number of pixels in one PSI-L word. The transfer happens in multiples
+ * of PSI-L word sizes.
+ */
+ pixels_in_word = PSIL_WORD_SIZE_BYTES * 8 / bpp;
+
+ fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
+ fsize->stepwise.min_width = pixels_in_word;
+ fsize->stepwise.max_width = rounddown(MAX_WIDTH_BYTES, pixels_in_word);
+ fsize->stepwise.step_width = pixels_in_word;
+ fsize->stepwise.min_height = 1;
+ fsize->stepwise.max_height = MAX_HEIGHT_BYTES;
+ fsize->stepwise.step_height = 1;
+
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops csi_ioctl_ops = {
+ .vidioc_querycap = ti_csi2rx_querycap,
+ .vidioc_enum_fmt_vid_cap = ti_csi2rx_enum_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = ti_csi2rx_try_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = ti_csi2rx_g_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = ti_csi2rx_s_fmt_vid_cap,
+ .vidioc_enum_framesizes = ti_csi2rx_enum_framesizes,
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+};
+
+static const struct v4l2_file_operations csi_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release,
+ .read = vb2_fop_read,
+ .poll = vb2_fop_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = vb2_fop_mmap,
+};
+
+static int ti_csi2rx_video_register(struct ti_csi2rx_dev *csi)
+{
+ struct video_device *vdev = &csi->vdev;
+ int ret, src_pad;
+
+ ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
+ if (ret)
+ return ret;
+
+ src_pad = media_entity_get_fwnode_pad(&csi->subdev->entity,
+ csi->subdev->fwnode,
+ MEDIA_PAD_FL_SOURCE);
+ if (src_pad < 0) {
+ dev_err(csi->dev, "Couldn't find source pad for subdev\n");
+ return src_pad;
+ }
+
+ ret = media_create_pad_link(&csi->subdev->entity, src_pad,
+ &vdev->entity, 0,
+ MEDIA_LNK_FL_IMMUTABLE |
+ MEDIA_LNK_FL_ENABLED);
+ if (ret) {
+ video_unregister_device(vdev);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int csi_async_notifier_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct ti_csi2rx_dev *csi = dev_get_drvdata(notifier->v4l2_dev->dev);
+
+ csi->subdev = subdev;
+
+ return 0;
+}
+
+static int csi_async_notifier_complete(struct v4l2_async_notifier *notifier)
+{
+ struct ti_csi2rx_dev *csi = dev_get_drvdata(notifier->v4l2_dev->dev);
+ int ret;
+
+ ret = ti_csi2rx_video_register(csi);
+ if (ret)
+ return ret;
+
+ return v4l2_device_register_subdev_nodes(&csi->v4l2_dev);
+}
+
+static const struct v4l2_async_notifier_operations csi_async_notifier_ops = {
+ .bound = csi_async_notifier_bound,
+ .complete = csi_async_notifier_complete,
+};
+
+static int ti_csi2rx_init_subdev(struct ti_csi2rx_dev *csi)
+{
+ struct fwnode_handle *fwnode;
+ struct v4l2_async_subdev *asd;
+ struct device_node *node;
+ int ret;
+
+ node = of_get_child_by_name(csi->dev->of_node, "csi-bridge");
+ if (!node)
+ return -EINVAL;
+
+ fwnode = of_fwnode_handle(node);
+ if (!fwnode) {
+ of_node_put(node);
+ return -EINVAL;
+ }
+
+ v4l2_async_nf_init(&csi->notifier);
+ csi->notifier.ops = &csi_async_notifier_ops;
+
+ asd = v4l2_async_nf_add_fwnode(&csi->notifier, fwnode,
+ struct v4l2_async_subdev);
+ of_node_put(node);
+ if (IS_ERR(asd)) {
+ v4l2_async_nf_cleanup(&csi->notifier);
+ return PTR_ERR(asd);
+ }
+
+ ret = v4l2_async_nf_register(&csi->v4l2_dev, &csi->notifier);
+ if (ret) {
+ v4l2_async_nf_cleanup(&csi->notifier);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void ti_csi2rx_setup_shim(struct ti_csi2rx_dev *csi)
+{
+ const struct ti_csi2rx_fmt *fmt;
+ unsigned int reg;
+
+ fmt = find_format_by_pix(csi->v_fmt.fmt.pix.pixelformat);
+ if (!fmt) {
+ dev_err(csi->dev, "Unknown format\n");
+ return;
+ }
+
+ /* De-assert the pixel interface reset. */
+ reg = SHIM_CNTL_PIX_RST;
+ writel(reg, csi->shim + SHIM_CNTL);
+
+ reg = SHIM_DMACNTX_EN;
+ reg |= FIELD_PREP(SHIM_DMACNTX_FMT, fmt->csi_df);
+
+ /*
+ * Using the values from the documentation gives incorrect ordering for
+ * the luma and chroma components. In practice, the "reverse" format
+ * gives the correct image. So for example, if the image is in UYVY, the
+ * reverse would be YVYU.
+ */
+ switch (fmt->fourcc) {
+ case V4L2_PIX_FMT_UYVY:
+ reg |= FIELD_PREP(SHIM_DMACNTX_YUV422,
+ SHIM_DMACNTX_YVYU);
+ break;
+ case V4L2_PIX_FMT_VYUY:
+ reg |= FIELD_PREP(SHIM_DMACNTX_YUV422,
+ SHIM_DMACNTX_YUYV);
+ break;
+ case V4L2_PIX_FMT_YUYV:
+ reg |= FIELD_PREP(SHIM_DMACNTX_YUV422,
+ SHIM_DMACNTX_VYUY);
+ break;
+ case V4L2_PIX_FMT_YVYU:
+ reg |= FIELD_PREP(SHIM_DMACNTX_YUV422,
+ SHIM_DMACNTX_UYVY);
+ break;
+ default:
+ /* Ignore if not YUV 4:2:2 */
+ break;
+ }
+
+ writel(reg, csi->shim + SHIM_DMACNTX);
+
+ reg = FIELD_PREP(SHIM_PSI_CFG0_SRC_TAG, 0) |
+ FIELD_PREP(SHIM_PSI_CFG0_DST_TAG, 1);
+ writel(reg, csi->shim + SHIM_PSI_CFG0);
+}
+
+static void ti_csi2rx_dma_callback(void *param)
+{
+ struct ti_csi2rx_buffer *buf = param;
+ struct ti_csi2rx_dev *csi = buf->csi;
+ struct ti_csi2rx_dma *dma = &csi->dma;
+ unsigned long flags = 0;
+
+ buf->vb.vb2_buf.timestamp = ktime_get_ns();
+ buf->vb.sequence = csi->sequence++;
+
+ spin_lock_irqsave(&dma->lock, flags);
+
+ WARN_ON(dma->curr != buf);
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
+
+ /* If there are more buffers to process then start their transfer. */
+ dma->curr = NULL;
+ while (!list_empty(&dma->queue)) {
+ buf = list_entry(dma->queue.next, struct ti_csi2rx_buffer, list);
+ list_del(&buf->list);
+
+ if (ti_csi2rx_start_dma(csi, buf)) {
+ dev_err(csi->dev, "Failed to queue the next buffer for DMA\n");
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+ } else {
+ dma->curr = buf;
+ break;
+ }
+ }
+
+ if (!dma->curr)
+ dma->state = TI_CSI2RX_DMA_IDLE;
+
+ spin_unlock_irqrestore(&dma->lock, flags);
+}
+
+static int ti_csi2rx_start_dma(struct ti_csi2rx_dev *csi,
+ struct ti_csi2rx_buffer *buf)
+{
+ unsigned long addr;
+ struct dma_async_tx_descriptor *desc;
+ size_t len = csi->v_fmt.fmt.pix.sizeimage;
+ dma_cookie_t cookie;
+ int ret = 0;
+
+ addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
+ desc = dmaengine_prep_slave_single(csi->dma.chan, addr, len,
+ DMA_DEV_TO_MEM,
+ DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+ if (!desc)
+ return -EIO;
+
+ desc->callback = ti_csi2rx_dma_callback;
+ desc->callback_param = buf;
+
+ cookie = dmaengine_submit(desc);
+ ret = dma_submit_error(cookie);
+ if (ret)
+ return ret;
+
+ dma_async_issue_pending(csi->dma.chan);
+
+ return 0;
+}
+
+static int ti_csi2rx_queue_setup(struct vb2_queue *q, unsigned int *nbuffers,
+ unsigned int *nplanes, unsigned int sizes[],
+ struct device *alloc_devs[])
+{
+ struct ti_csi2rx_dev *csi = vb2_get_drv_priv(q);
+ unsigned int size = csi->v_fmt.fmt.pix.sizeimage;
+
+ if (*nplanes) {
+ if (sizes[0] < size)
+ return -EINVAL;
+ size = sizes[0];
+ }
+
+ *nplanes = 1;
+ sizes[0] = size;
+
+ return 0;
+}
+
+static int ti_csi2rx_buffer_prepare(struct vb2_buffer *vb)
+{
+ struct ti_csi2rx_dev *csi = vb2_get_drv_priv(vb->vb2_queue);
+ unsigned long size = csi->v_fmt.fmt.pix.sizeimage;
+
+ if (vb2_plane_size(vb, 0) < size) {
+ dev_err(csi->dev, "Data will not fit into plane\n");
+ return -EINVAL;
+ }
+
+ vb2_set_plane_payload(vb, 0, size);
+ return 0;
+}
+
+static void ti_csi2rx_buffer_queue(struct vb2_buffer *vb)
+{
+ struct ti_csi2rx_dev *csi = vb2_get_drv_priv(vb->vb2_queue);
+ struct ti_csi2rx_buffer *buf;
+ struct ti_csi2rx_dma *dma = &csi->dma;
+ unsigned long flags = 0;
+ int ret;
+
+ buf = container_of(vb, struct ti_csi2rx_buffer, vb.vb2_buf);
+ buf->csi = csi;
+
+ spin_lock_irqsave(&dma->lock, flags);
+ /*
+ * Usually the DMA callback takes care of queueing the pending buffers.
+ * But if DMA has stalled due to lack of buffers, restart it now.
+ */
+ if (dma->state == TI_CSI2RX_DMA_IDLE) {
+ ret = ti_csi2rx_start_dma(csi, buf);
+ if (ret) {
+ dev_err(csi->dev, "Failed to start DMA: %d\n", ret);
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
+ goto unlock;
+ }
+
+ dma->curr = buf;
+ dma->state = TI_CSI2RX_DMA_ACTIVE;
+ } else {
+ list_add_tail(&buf->list, &dma->queue);
+ }
+
+unlock:
+ spin_unlock_irqrestore(&dma->lock, flags);
+}
+
+static int ti_csi2rx_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct ti_csi2rx_dev *csi = vb2_get_drv_priv(vq);
+ struct ti_csi2rx_dma *dma = &csi->dma;
+ struct ti_csi2rx_buffer *buf, *tmp;
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&dma->lock, flags);
+ if (list_empty(&dma->queue))
+ ret = -EIO;
+ spin_unlock_irqrestore(&dma->lock, flags);
+ if (ret)
+ return ret;
+
+ ret = media_pipeline_start(&csi->vdev.entity, &csi->pipe);
+ if (ret)
+ goto err;
+
+ ti_csi2rx_setup_shim(csi);
+
+ ret = v4l2_subdev_call(csi->subdev, video, s_stream, 1);
+ if (ret)
+ goto err_pipeline;
+
+ csi->sequence = 0;
+
+ spin_lock_irqsave(&dma->lock, flags);
+ buf = list_entry(dma->queue.next, struct ti_csi2rx_buffer, list);
+ list_del(&buf->list);
+ dma->state = TI_CSI2RX_DMA_ACTIVE;
+
+ ret = ti_csi2rx_start_dma(csi, buf);
+ if (ret) {
+ dev_err(csi->dev, "Failed to start DMA: %d\n", ret);
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
+ spin_unlock_irqrestore(&dma->lock, flags);
+ goto err_stream;
+ }
+
+ dma->curr = buf;
+ spin_unlock_irqrestore(&dma->lock, flags);
+
+ return 0;
+
+err_stream:
+ v4l2_subdev_call(csi->subdev, video, s_stream, 0);
+err_pipeline:
+ media_pipeline_stop(&csi->vdev.entity);
+err:
+ spin_lock_irqsave(&dma->lock, flags);
+ list_for_each_entry_safe(buf, tmp, &dma->queue, list) {
+ list_del(&buf->list);
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
+ }
+ csi->dma.state = TI_CSI2RX_DMA_STOPPED;
+ spin_unlock_irqrestore(&dma->lock, flags);
+
+ return ret;
+}
+
+static void ti_csi2rx_stop_streaming(struct vb2_queue *vq)
+{
+ struct ti_csi2rx_dev *csi = vb2_get_drv_priv(vq);
+ struct ti_csi2rx_buffer *buf = NULL, *tmp;
+ struct ti_csi2rx_dma *dma = &csi->dma;
+ unsigned long flags = 0;
+ int ret;
+
+ media_pipeline_stop(&csi->vdev.entity);
+
+ ret = v4l2_subdev_call(csi->subdev, video, s_stream, 0);
+ if (ret)
+ dev_err(csi->dev, "Failed to stop subdev stream\n");
+
+ writel(0, csi->shim + SHIM_CNTL);
+
+ ret = dmaengine_terminate_sync(csi->dma.chan);
+ if (ret)
+ dev_err(csi->dev, "Failed to stop DMA\n");
+
+ writel(0, csi->shim + SHIM_DMACNTX);
+
+ spin_lock_irqsave(&dma->lock, flags);
+ list_for_each_entry_safe(buf, tmp, &csi->dma.queue, list) {
+ list_del(&buf->list);
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+ }
+
+ if (dma->curr)
+ vb2_buffer_done(&dma->curr->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+
+ dma->curr = NULL;
+ dma->state = TI_CSI2RX_DMA_STOPPED;
+ spin_unlock_irqrestore(&dma->lock, flags);
+}
+
+static const struct vb2_ops csi_vb2_qops = {
+ .queue_setup = ti_csi2rx_queue_setup,
+ .buf_prepare = ti_csi2rx_buffer_prepare,
+ .buf_queue = ti_csi2rx_buffer_queue,
+ .start_streaming = ti_csi2rx_start_streaming,
+ .stop_streaming = ti_csi2rx_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+static int ti_csi2rx_init_vb2q(struct ti_csi2rx_dev *csi)
+{
+ struct vb2_queue *q = &csi->vidq;
+ int ret;
+
+ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ;
+ q->drv_priv = csi;
+ q->buf_struct_size = sizeof(struct ti_csi2rx_buffer);
+ q->ops = &csi_vb2_qops;
+ q->mem_ops = &vb2_dma_contig_memops;
+ q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ q->dev = dmaengine_get_dma_device(csi->dma.chan);
+ q->lock = &csi->mutex;
+
+ ret = vb2_queue_init(q);
+ if (ret)
+ return ret;
+
+ csi->vdev.queue = q;
+
+ return 0;
+}
+
+static int ti_csi2rx_init_dma(struct ti_csi2rx_dev *csi)
+{
+ struct dma_slave_config cfg;
+ int ret;
+
+ INIT_LIST_HEAD(&csi->dma.queue);
+ spin_lock_init(&csi->dma.lock);
+
+ csi->dma.state = TI_CSI2RX_DMA_STOPPED;
+
+ csi->dma.chan = dma_request_chan(csi->dev, "rx0");
+ if (IS_ERR(csi->dma.chan))
+ return PTR_ERR(csi->dma.chan);
+
+ memset(&cfg, 0, sizeof(cfg));
+
+ cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_16_BYTES;
+
+ ret = dmaengine_slave_config(csi->dma.chan, &cfg);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ti_csi2rx_v4l2_init(struct ti_csi2rx_dev *csi)
+{
+ struct media_device *mdev = &csi->mdev;
+ struct video_device *vdev = &csi->vdev;
+ const struct ti_csi2rx_fmt *fmt;
+ struct v4l2_pix_format *pix_fmt = &csi->v_fmt.fmt.pix;
+ int ret;
+
+ fmt = find_format_by_pix(V4L2_PIX_FMT_UYVY);
+ if (!fmt)
+ return -EINVAL;
+
+ pix_fmt->width = 640;
+ pix_fmt->height = 480;
+
+ ti_csi2rx_fill_fmt(fmt, &csi->v_fmt);
+
+ mdev->dev = csi->dev;
+ mdev->hw_revision = 1;
+ strscpy(mdev->model, "TI-CSI2RX", sizeof(mdev->model));
+ snprintf(mdev->bus_info, sizeof(mdev->bus_info), "platform:%s",
+ dev_name(mdev->dev));
+
+ media_device_init(mdev);
+
+ strscpy(vdev->name, TI_CSI2RX_MODULE_NAME, sizeof(vdev->name));
+ vdev->v4l2_dev = &csi->v4l2_dev;
+ vdev->vfl_dir = VFL_DIR_RX;
+ vdev->fops = &csi_fops;
+ vdev->ioctl_ops = &csi_ioctl_ops;
+ vdev->release = video_device_release_empty;
+ vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
+ V4L2_CAP_STREAMING | V4L2_CAP_IO_MC;
+ vdev->lock = &csi->mutex;
+ video_set_drvdata(vdev, csi);
+
+ csi->pad.flags = MEDIA_PAD_FL_SINK;
+ ret = media_entity_pads_init(&csi->vdev.entity, 1, &csi->pad);
+ if (ret)
+ return ret;
+
+ csi->v4l2_dev.mdev = mdev;
+
+ ret = v4l2_device_register(csi->dev, &csi->v4l2_dev);
+ if (ret)
+ return ret;
+
+ ret = media_device_register(mdev);
+ if (ret) {
+ v4l2_device_unregister(&csi->v4l2_dev);
+ media_device_cleanup(mdev);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void ti_csi2rx_cleanup_dma(struct ti_csi2rx_dev *csi)
+{
+ dma_release_channel(csi->dma.chan);
+}
+
+static void ti_csi2rx_cleanup_v4l2(struct ti_csi2rx_dev *csi)
+{
+ media_device_unregister(&csi->mdev);
+ v4l2_device_unregister(&csi->v4l2_dev);
+ media_device_cleanup(&csi->mdev);
+}
+
+static void ti_csi2rx_cleanup_subdev(struct ti_csi2rx_dev *csi)
+{
+ v4l2_async_nf_unregister(&csi->notifier);
+ v4l2_async_nf_cleanup(&csi->notifier);
+}
+
+static void ti_csi2rx_cleanup_vb2q(struct ti_csi2rx_dev *csi)
+{
+ vb2_queue_release(&csi->vidq);
+}
+
+static int ti_csi2rx_probe(struct platform_device *pdev)
+{
+ struct ti_csi2rx_dev *csi;
+ struct resource *res;
+ int ret;
+
+ csi = devm_kzalloc(&pdev->dev, sizeof(*csi), GFP_KERNEL);
+ if (!csi)
+ return -ENOMEM;
+
+ csi->dev = &pdev->dev;
+ platform_set_drvdata(pdev, csi);
+
+ mutex_init(&csi->mutex);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ csi->shim = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(csi->shim))
+ return PTR_ERR(csi->shim);
+
+ ret = ti_csi2rx_init_dma(csi);
+ if (ret)
+ return ret;
+
+ ret = ti_csi2rx_v4l2_init(csi);
+ if (ret)
+ goto err_dma;
+
+ ret = ti_csi2rx_init_vb2q(csi);
+ if (ret)
+ goto err_v4l2;
+
+ ret = ti_csi2rx_init_subdev(csi);
+ if (ret)
+ goto err_vb2q;
+
+ ret = of_platform_populate(csi->dev->of_node, NULL, NULL, csi->dev);
+ if (ret) {
+ dev_err(csi->dev, "Failed to create children: %d\n", ret);
+ goto err_subdev;
+ }
+
+ return 0;
+
+err_subdev:
+ ti_csi2rx_cleanup_subdev(csi);
+err_vb2q:
+ ti_csi2rx_cleanup_vb2q(csi);
+err_v4l2:
+ ti_csi2rx_cleanup_v4l2(csi);
+err_dma:
+ ti_csi2rx_cleanup_dma(csi);
+ return ret;
+}
+
+static int ti_csi2rx_remove(struct platform_device *pdev)
+{
+ struct ti_csi2rx_dev *csi = platform_get_drvdata(pdev);
+
+ if (vb2_is_busy(&csi->vidq))
+ return -EBUSY;
+
+ video_unregister_device(&csi->vdev);
+
+ ti_csi2rx_cleanup_vb2q(csi);
+ ti_csi2rx_cleanup_subdev(csi);
+ ti_csi2rx_cleanup_v4l2(csi);
+ ti_csi2rx_cleanup_dma(csi);
+
+ return 0;
+}
+
+static const struct of_device_id ti_csi2rx_of_match[] = {
+ { .compatible = "ti,j721e-csi2rx", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, ti_csi2rx_of_match);
+
+static struct platform_driver ti_csi2rx_pdrv = {
+ .probe = ti_csi2rx_probe,
+ .remove = ti_csi2rx_remove,
+ .driver = {
+ .name = TI_CSI2RX_MODULE_NAME,
+ .of_match_table = ti_csi2rx_of_match,
+ },
+};
+
+module_platform_driver(ti_csi2rx_pdrv);
+
+MODULE_DESCRIPTION("TI J721E CSI2 RX Driver");
+MODULE_AUTHOR("Pratyush Yadav <p.yadav@ti.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION("1.0");
--
2.34.1
^ permalink raw reply related
* [PATCH v6 12/14] media: dt-bindings: Make sure items in data-lanes are unique
From: Pratyush Yadav @ 2022-01-21 14:29 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
In-Reply-To: <20220121142904.4091481-1-p.yadav@ti.com>
The data-lanes property maps the logical lane numbers to the physical
lane numbers. The position of an entry is the logical lane number and
its value is the physical lane number. Since one physical lane can only
map to one logical lane, no number in the list should repeat. Add the
uniqueItems constraint on the property to enforce this.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Rob Herring <robh@kernel.org>
---
(no changes since v5)
Changes in v5:
- Add Laurent's R-by and Rob's Ack.
Changes in v4:
- New in v4.
Documentation/devicetree/bindings/media/video-interfaces.yaml | 1 +
1 file changed, 1 insertion(+)
diff --git a/Documentation/devicetree/bindings/media/video-interfaces.yaml b/Documentation/devicetree/bindings/media/video-interfaces.yaml
index 4391dce2caee..4bce93efae5f 100644
--- a/Documentation/devicetree/bindings/media/video-interfaces.yaml
+++ b/Documentation/devicetree/bindings/media/video-interfaces.yaml
@@ -158,6 +158,7 @@ properties:
$ref: /schemas/types.yaml#/definitions/uint32-array
minItems: 1
maxItems: 8
+ uniqueItems: true
items:
# Assume up to 9 physical lane indices
maximum: 8
--
2.34.1
^ permalink raw reply related
* [PATCH v6 10/14] media: Re-structure TI platform drivers
From: Pratyush Yadav @ 2022-01-21 14:29 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
In-Reply-To: <20220121142904.4091481-1-p.yadav@ti.com>
The ti-vpe/ sub-directory does not only contain the VPE-specific things.
It also contains the CAL driver, which is a completely different
subsystem. This is also not a good place to add new drivers for other TI
platforms since they will all get mixed up.
Separate the VPE and CAL parts into different sub-directories and rename
the ti-vpe/ sub-directory to ti/. This is now the place where new TI
platform drivers can be added.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
Compile tested only. There should be no functional change.
(no changes since v5)
Changes in v5:
- Add Laurent's R-by.
Changes in v3:
- Add Tomi's R-by.
Changes in v2:
- New in v2.
MAINTAINERS | 3 ++-
drivers/media/platform/Makefile | 2 +-
drivers/media/platform/ti/Makefile | 3 +++
drivers/media/platform/ti/cal/Makefile | 3 +++
drivers/media/platform/{ti-vpe => ti/cal}/cal-camerarx.c | 0
drivers/media/platform/{ti-vpe => ti/cal}/cal-video.c | 0
drivers/media/platform/{ti-vpe => ti/cal}/cal.c | 0
drivers/media/platform/{ti-vpe => ti/cal}/cal.h | 0
drivers/media/platform/{ti-vpe => ti/cal}/cal_regs.h | 0
drivers/media/platform/{ti-vpe => ti/vpe}/Makefile | 4 ----
drivers/media/platform/{ti-vpe => ti/vpe}/csc.c | 0
drivers/media/platform/{ti-vpe => ti/vpe}/csc.h | 0
drivers/media/platform/{ti-vpe => ti/vpe}/sc.c | 0
drivers/media/platform/{ti-vpe => ti/vpe}/sc.h | 0
drivers/media/platform/{ti-vpe => ti/vpe}/sc_coeff.h | 0
drivers/media/platform/{ti-vpe => ti/vpe}/vpdma.c | 0
drivers/media/platform/{ti-vpe => ti/vpe}/vpdma.h | 0
drivers/media/platform/{ti-vpe => ti/vpe}/vpdma_priv.h | 0
drivers/media/platform/{ti-vpe => ti/vpe}/vpe.c | 0
drivers/media/platform/{ti-vpe => ti/vpe}/vpe_regs.h | 0
20 files changed, 9 insertions(+), 6 deletions(-)
create mode 100644 drivers/media/platform/ti/Makefile
create mode 100644 drivers/media/platform/ti/cal/Makefile
rename drivers/media/platform/{ti-vpe => ti/cal}/cal-camerarx.c (100%)
rename drivers/media/platform/{ti-vpe => ti/cal}/cal-video.c (100%)
rename drivers/media/platform/{ti-vpe => ti/cal}/cal.c (100%)
rename drivers/media/platform/{ti-vpe => ti/cal}/cal.h (100%)
rename drivers/media/platform/{ti-vpe => ti/cal}/cal_regs.h (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/Makefile (78%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/csc.c (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/csc.h (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/sc.c (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/sc.h (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/sc_coeff.h (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/vpdma.c (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/vpdma.h (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/vpdma_priv.h (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/vpe.c (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/vpe_regs.h (100%)
diff --git a/MAINTAINERS b/MAINTAINERS
index 16bc8cdc1492..3b8fa4e5047f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19299,7 +19299,8 @@ W: http://linuxtv.org/
Q: http://patchwork.linuxtv.org/project/linux-media/list/
F: Documentation/devicetree/bindings/media/ti,cal.yaml
F: Documentation/devicetree/bindings/media/ti,vpe.yaml
-F: drivers/media/platform/ti-vpe/
+F: drivers/media/platform/ti/cal/
+F: drivers/media/platform/ti/vpe/
TI WILINK WIRELESS DRIVERS
L: linux-wireless@vger.kernel.org
diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
index 19bcbced7382..ba9405ab2490 100644
--- a/drivers/media/platform/Makefile
+++ b/drivers/media/platform/Makefile
@@ -15,7 +15,7 @@ obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o
obj-$(CONFIG_VIDEO_VIU) += fsl-viu.o
-obj-y += ti-vpe/
+obj-y += ti/
obj-$(CONFIG_VIDEO_MX2_EMMAPRP) += mx2_emmaprp.o
obj-$(CONFIG_VIDEO_CODA) += coda/
diff --git a/drivers/media/platform/ti/Makefile b/drivers/media/platform/ti/Makefile
new file mode 100644
index 000000000000..bbc737ccbbea
--- /dev/null
+++ b/drivers/media/platform/ti/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-y += cal/
+obj-y += vpe/
diff --git a/drivers/media/platform/ti/cal/Makefile b/drivers/media/platform/ti/cal/Makefile
new file mode 100644
index 000000000000..45ac35585f0b
--- /dev/null
+++ b/drivers/media/platform/ti/cal/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_VIDEO_TI_CAL) += ti-cal.o
+ti-cal-y := cal.o cal-camerarx.o cal-video.o
diff --git a/drivers/media/platform/ti-vpe/cal-camerarx.c b/drivers/media/platform/ti/cal/cal-camerarx.c
similarity index 100%
rename from drivers/media/platform/ti-vpe/cal-camerarx.c
rename to drivers/media/platform/ti/cal/cal-camerarx.c
diff --git a/drivers/media/platform/ti-vpe/cal-video.c b/drivers/media/platform/ti/cal/cal-video.c
similarity index 100%
rename from drivers/media/platform/ti-vpe/cal-video.c
rename to drivers/media/platform/ti/cal/cal-video.c
diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti/cal/cal.c
similarity index 100%
rename from drivers/media/platform/ti-vpe/cal.c
rename to drivers/media/platform/ti/cal/cal.c
diff --git a/drivers/media/platform/ti-vpe/cal.h b/drivers/media/platform/ti/cal/cal.h
similarity index 100%
rename from drivers/media/platform/ti-vpe/cal.h
rename to drivers/media/platform/ti/cal/cal.h
diff --git a/drivers/media/platform/ti-vpe/cal_regs.h b/drivers/media/platform/ti/cal/cal_regs.h
similarity index 100%
rename from drivers/media/platform/ti-vpe/cal_regs.h
rename to drivers/media/platform/ti/cal/cal_regs.h
diff --git a/drivers/media/platform/ti-vpe/Makefile b/drivers/media/platform/ti/vpe/Makefile
similarity index 78%
rename from drivers/media/platform/ti-vpe/Makefile
rename to drivers/media/platform/ti/vpe/Makefile
index ad624056e039..3fadfe084f87 100644
--- a/drivers/media/platform/ti-vpe/Makefile
+++ b/drivers/media/platform/ti/vpe/Makefile
@@ -10,7 +10,3 @@ ti-sc-y := sc.o
ti-csc-y := csc.o
ccflags-$(CONFIG_VIDEO_TI_VPE_DEBUG) += -DDEBUG
-
-obj-$(CONFIG_VIDEO_TI_CAL) += ti-cal.o
-
-ti-cal-y := cal.o cal-camerarx.o cal-video.o
diff --git a/drivers/media/platform/ti-vpe/csc.c b/drivers/media/platform/ti/vpe/csc.c
similarity index 100%
rename from drivers/media/platform/ti-vpe/csc.c
rename to drivers/media/platform/ti/vpe/csc.c
diff --git a/drivers/media/platform/ti-vpe/csc.h b/drivers/media/platform/ti/vpe/csc.h
similarity index 100%
rename from drivers/media/platform/ti-vpe/csc.h
rename to drivers/media/platform/ti/vpe/csc.h
diff --git a/drivers/media/platform/ti-vpe/sc.c b/drivers/media/platform/ti/vpe/sc.c
similarity index 100%
rename from drivers/media/platform/ti-vpe/sc.c
rename to drivers/media/platform/ti/vpe/sc.c
diff --git a/drivers/media/platform/ti-vpe/sc.h b/drivers/media/platform/ti/vpe/sc.h
similarity index 100%
rename from drivers/media/platform/ti-vpe/sc.h
rename to drivers/media/platform/ti/vpe/sc.h
diff --git a/drivers/media/platform/ti-vpe/sc_coeff.h b/drivers/media/platform/ti/vpe/sc_coeff.h
similarity index 100%
rename from drivers/media/platform/ti-vpe/sc_coeff.h
rename to drivers/media/platform/ti/vpe/sc_coeff.h
diff --git a/drivers/media/platform/ti-vpe/vpdma.c b/drivers/media/platform/ti/vpe/vpdma.c
similarity index 100%
rename from drivers/media/platform/ti-vpe/vpdma.c
rename to drivers/media/platform/ti/vpe/vpdma.c
diff --git a/drivers/media/platform/ti-vpe/vpdma.h b/drivers/media/platform/ti/vpe/vpdma.h
similarity index 100%
rename from drivers/media/platform/ti-vpe/vpdma.h
rename to drivers/media/platform/ti/vpe/vpdma.h
diff --git a/drivers/media/platform/ti-vpe/vpdma_priv.h b/drivers/media/platform/ti/vpe/vpdma_priv.h
similarity index 100%
rename from drivers/media/platform/ti-vpe/vpdma_priv.h
rename to drivers/media/platform/ti/vpe/vpdma_priv.h
diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti/vpe/vpe.c
similarity index 100%
rename from drivers/media/platform/ti-vpe/vpe.c
rename to drivers/media/platform/ti/vpe/vpe.c
diff --git a/drivers/media/platform/ti-vpe/vpe_regs.h b/drivers/media/platform/ti/vpe/vpe_regs.h
similarity index 100%
rename from drivers/media/platform/ti-vpe/vpe_regs.h
rename to drivers/media/platform/ti/vpe/vpe_regs.h
--
2.34.1
^ permalink raw reply related
* [PATCH v6 05/14] media: cadence: csi2rx: Soft reset the streams before starting capture
From: Pratyush Yadav @ 2022-01-21 14:28 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
In-Reply-To: <20220121142904.4091481-1-p.yadav@ti.com>
This resets the stream state machines and FIFOs, giving them a clean
slate. On J721E if the streams are not reset before starting the
capture, the captured frame gets wrapped around vertically on every run
after the first.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
(no changes since v5)
Changes in v5:
- Make i unsigned.
- Add Laurent's R-by.
drivers/media/platform/cadence/cdns-csi2rx.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
index 489f0d6e80d5..346afb3578ac 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -39,6 +39,7 @@
#define CSI2RX_STREAM_BASE(n) (((n) + 1) * 0x100)
#define CSI2RX_STREAM_CTRL_REG(n) (CSI2RX_STREAM_BASE(n) + 0x000)
+#define CSI2RX_STREAM_CTRL_SOFT_RST BIT(4)
#define CSI2RX_STREAM_CTRL_START BIT(0)
#define CSI2RX_STREAM_DATA_CFG_REG(n) (CSI2RX_STREAM_BASE(n) + 0x008)
@@ -135,12 +136,22 @@ struct csi2rx_priv *v4l2_subdev_to_csi2rx(struct v4l2_subdev *subdev)
static void csi2rx_reset(struct csi2rx_priv *csi2rx)
{
+ unsigned int i;
+
writel(CSI2RX_SOFT_RESET_PROTOCOL | CSI2RX_SOFT_RESET_FRONT,
csi2rx->base + CSI2RX_SOFT_RESET_REG);
udelay(10);
writel(0, csi2rx->base + CSI2RX_SOFT_RESET_REG);
+
+ /* Reset individual streams. */
+ for (i = 0; i < csi2rx->max_streams; i++) {
+ writel(CSI2RX_STREAM_CTRL_SOFT_RST,
+ csi2rx->base + CSI2RX_STREAM_CTRL_REG(i));
+ usleep_range(10, 20);
+ writel(0, csi2rx->base + CSI2RX_STREAM_CTRL_REG(i));
+ }
}
static int csi2rx_configure_external_dphy(struct csi2rx_priv *csi2rx)
--
2.34.1
^ permalink raw reply related
* [PATCH v6 08/14] media: cadence: csi2rx: Populate subdev devnode
From: Pratyush Yadav @ 2022-01-21 14:28 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
In-Reply-To: <20220121142904.4091481-1-p.yadav@ti.com>
The devnode can be used by media-ctl and other userspace tools to
perform configurations on the subdev. Without it, media-ctl returns
ENOENT when setting format on the sensor subdev.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
(no changes since v5)
Changes in v5:
- Add Laurent's R-by.
Changes in v2:
- New in v2.
drivers/media/platform/cadence/cdns-csi2rx.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
index f072e5111240..28fb2078d10d 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -677,6 +677,7 @@ static int csi2rx_probe(struct platform_device *pdev)
csi2rx->pads[CSI2RX_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
for (i = CSI2RX_PAD_SOURCE_STREAM0; i < CSI2RX_PAD_MAX; i++)
csi2rx->pads[i].flags = MEDIA_PAD_FL_SOURCE;
+ csi2rx->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
ret = media_entity_pads_init(&csi2rx->subdev.entity, CSI2RX_PAD_MAX,
csi2rx->pads);
--
2.34.1
^ permalink raw reply related
* [PATCH v6 07/14] media: cadence: csi2rx: Fix stream data configuration
From: Pratyush Yadav @ 2022-01-21 14:28 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
In-Reply-To: <20220121142904.4091481-1-p.yadav@ti.com>
Firstly, there is no VC_EN bit present in the STREAM_DATA_CFG register.
Bit 31 is part of the VL_SELECT field. Remove it completely.
Secondly, it makes little sense to enable ith virtual channel for ith
stream. Sure, there might be a use-case that demands it. But there might
also be a use case that demands all streams to use the 0th virtual
channel. Prefer this case over the former because it is less arbitrary
and also makes it very clear what the limitations of the current driver
is instead of giving a false impression that multiple virtual channels
are supported.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
(no changes since v1)
drivers/media/platform/cadence/cdns-csi2rx.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
index 5cc18fe0f1b9..f072e5111240 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -48,7 +48,6 @@
#define CSI2RX_STREAM_STATUS_RDY BIT(31)
#define CSI2RX_STREAM_DATA_CFG_REG(n) (CSI2RX_STREAM_BASE(n) + 0x008)
-#define CSI2RX_STREAM_DATA_CFG_EN_VC_SELECT BIT(31)
#define CSI2RX_STREAM_DATA_CFG_VC_SELECT(n) BIT((n) + 16)
#define CSI2RX_STREAM_CFG_REG(n) (CSI2RX_STREAM_BASE(n) + 0x00c)
@@ -270,8 +269,11 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx)
writel(CSI2RX_STREAM_CFG_FIFO_MODE_LARGE_BUF,
csi2rx->base + CSI2RX_STREAM_CFG_REG(i));
- writel(CSI2RX_STREAM_DATA_CFG_EN_VC_SELECT |
- CSI2RX_STREAM_DATA_CFG_VC_SELECT(i),
+ /*
+ * Enable one virtual channel. When multiple virtual channels
+ * are supported this will have to be changed.
+ */
+ writel(CSI2RX_STREAM_DATA_CFG_VC_SELECT(0),
csi2rx->base + CSI2RX_STREAM_DATA_CFG_REG(i));
writel(CSI2RX_STREAM_CTRL_START,
--
2.34.1
^ permalink raw reply related
* [PATCH v6 04/14] media: cadence: csi2rx: Add external DPHY support
From: Pratyush Yadav @ 2022-01-21 14:28 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
In-Reply-To: <20220121142904.4091481-1-p.yadav@ti.com>
Some platforms like TI's J721E can have the CSI2RX paired with an
external DPHY. Add support to enable and configure the DPHY using the
generic PHY framework.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
Changes in v6:
- Drop variable bpp and use fmt->bpp directly.
- Drop variable got_pm. Call phy_pm_runtime_put() unconditionally since
it will just return an error if runtime PM is not enabled.
- Add Laurent's R-by.
Changes in v5:
- Only error out when phy_pm_runtime_get_sync() returns a negative
value. A positive value can be returned if the phy was already
resumed.
- Do not query the source subdev for format. Use the newly added
internal format instead.
Changes in v4:
- Drop the call to set PHY submode. It is now being done via compatible
on the DPHY side.
Changes in v3:
- Use v4l2_get_link_freq() to calculate pixel clock.
Changes in v2:
- Use phy_pm_runtime_get_sync() and phy_pm_runtime_put() before making
calls to set PHY mode, etc. to make sure it is ready.
drivers/media/platform/cadence/cdns-csi2rx.c | 91 +++++++++++++++++---
1 file changed, 81 insertions(+), 10 deletions(-)
diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
index ae3ebdb3890d..489f0d6e80d5 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -30,6 +30,12 @@
#define CSI2RX_STATIC_CFG_DLANE_MAP(llane, plane) ((plane) << (16 + (llane) * 4))
#define CSI2RX_STATIC_CFG_LANES_MASK GENMASK(11, 8)
+#define CSI2RX_DPHY_LANE_CTRL_REG 0x40
+#define CSI2RX_DPHY_CL_RST BIT(16)
+#define CSI2RX_DPHY_DL_RST(i) BIT((i) + 12)
+#define CSI2RX_DPHY_CL_EN BIT(4)
+#define CSI2RX_DPHY_DL_EN(i) BIT(i)
+
#define CSI2RX_STREAM_BASE(n) (((n) + 1) * 0x100)
#define CSI2RX_STREAM_CTRL_REG(n) (CSI2RX_STREAM_BASE(n) + 0x000)
@@ -137,6 +143,50 @@ static void csi2rx_reset(struct csi2rx_priv *csi2rx)
writel(0, csi2rx->base + CSI2RX_SOFT_RESET_REG);
}
+static int csi2rx_configure_external_dphy(struct csi2rx_priv *csi2rx)
+{
+ union phy_configure_opts opts = { };
+ struct phy_configure_opts_mipi_dphy *cfg = &opts.mipi_dphy;
+ const struct csi2rx_fmt *fmt;
+ s64 pixel_clock;
+ int ret;
+
+ fmt = csi2rx_get_fmt_by_code(csi2rx->fmt.code);
+
+ /*
+ * Do not divide by the number of lanes here. That will be done by
+ * phy_mipi_dphy_get_default_config().
+ */
+ pixel_clock = v4l2_get_link_freq(csi2rx->source_subdev->ctrl_handler,
+ 1, 2);
+ if (pixel_clock < 0)
+ return pixel_clock;
+
+ ret = phy_mipi_dphy_get_default_config(pixel_clock, fmt->bpp,
+ csi2rx->num_lanes, cfg);
+ if (ret)
+ return ret;
+
+ ret = phy_pm_runtime_get_sync(csi2rx->dphy);
+ if (ret < 0 && ret != -ENOTSUPP)
+ return ret;
+
+ ret = phy_power_on(csi2rx->dphy);
+ if (ret)
+ goto out;
+
+ ret = phy_configure(csi2rx->dphy, &opts);
+ if (ret) {
+ /* Can't do anything if it fails. Ignore the return value. */
+ phy_power_off(csi2rx->dphy);
+ goto out;
+ }
+
+out:
+ phy_pm_runtime_put(csi2rx->dphy);
+ return ret;
+}
+
static int csi2rx_start(struct csi2rx_priv *csi2rx)
{
unsigned int i;
@@ -175,6 +225,17 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx)
if (ret)
goto err_disable_pclk;
+ /* Enable DPHY clk and data lanes. */
+ if (csi2rx->dphy) {
+ reg = CSI2RX_DPHY_CL_EN | CSI2RX_DPHY_CL_RST;
+ for (i = 0; i < csi2rx->num_lanes; i++) {
+ reg |= CSI2RX_DPHY_DL_EN(csi2rx->lanes[i] - 1);
+ reg |= CSI2RX_DPHY_DL_RST(csi2rx->lanes[i] - 1);
+ }
+
+ writel(reg, csi2rx->base + CSI2RX_DPHY_LANE_CTRL_REG);
+ }
+
/*
* Create a static mapping between the CSI virtual channels
* and the output stream.
@@ -205,10 +266,21 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx)
if (ret)
goto err_disable_pixclk;
+ if (csi2rx->dphy) {
+ ret = csi2rx_configure_external_dphy(csi2rx);
+ if (ret) {
+ dev_err(csi2rx->dev,
+ "Failed to configure external DPHY: %d\n", ret);
+ goto err_disable_sysclk;
+ }
+ }
+
clk_disable_unprepare(csi2rx->p_clk);
return 0;
+err_disable_sysclk:
+ clk_disable_unprepare(csi2rx->sys_clk);
err_disable_pixclk:
for (; i > 0; i--)
clk_disable_unprepare(csi2rx->pixel_clk[i - 1]);
@@ -236,6 +308,13 @@ static void csi2rx_stop(struct csi2rx_priv *csi2rx)
if (v4l2_subdev_call(csi2rx->source_subdev, video, s_stream, false))
dev_warn(csi2rx->dev, "Couldn't disable our subdev\n");
+
+ if (csi2rx->dphy) {
+ writel(0, csi2rx->base + CSI2RX_DPHY_LANE_CTRL_REG);
+
+ if (phy_power_off(csi2rx->dphy))
+ dev_warn(csi2rx->dev, "Couldn't power off DPHY\n");
+ }
}
static int csi2rx_s_stream(struct v4l2_subdev *subdev, int enable)
@@ -432,15 +511,6 @@ static int csi2rx_get_resources(struct csi2rx_priv *csi2rx,
return PTR_ERR(csi2rx->dphy);
}
- /*
- * FIXME: Once we'll have external D-PHY support, the check
- * will need to be removed.
- */
- if (csi2rx->dphy) {
- dev_err(&pdev->dev, "External D-PHY not supported yet\n");
- return -EINVAL;
- }
-
ret = clk_prepare_enable(csi2rx->p_clk);
if (ret) {
dev_err(&pdev->dev, "Couldn't prepare and enable P clock\n");
@@ -470,7 +540,7 @@ static int csi2rx_get_resources(struct csi2rx_priv *csi2rx,
* FIXME: Once we'll have internal D-PHY support, the check
* will need to be removed.
*/
- if (csi2rx->has_internal_dphy) {
+ if (!csi2rx->dphy && csi2rx->has_internal_dphy) {
dev_err(&pdev->dev, "Internal D-PHY not supported yet\n");
return -EINVAL;
}
@@ -595,6 +665,7 @@ static int csi2rx_probe(struct platform_device *pdev)
dev_info(&pdev->dev,
"Probed CSI2RX with %u/%u lanes, %u streams, %s D-PHY\n",
csi2rx->num_lanes, csi2rx->max_lanes, csi2rx->max_streams,
+ csi2rx->dphy ? "external" :
csi2rx->has_internal_dphy ? "internal" : "no");
return 0;
--
2.34.1
^ permalink raw reply related
* [PATCH v6 02/14] media: cadence: csi2rx: Cleanup media entity properly
From: Pratyush Yadav @ 2022-01-21 14:28 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
In-Reply-To: <20220121142904.4091481-1-p.yadav@ti.com>
Call media_entity_cleanup() in probe error path and remove to make sure
the media entity is cleaned up properly.
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
Changes in v6:
- Add Laurent's R-by.
Changes in v5:
- New in v5.
drivers/media/platform/cadence/cdns-csi2rx.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
index 2a23da6a0b8e..2547903f2e8e 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -471,6 +471,7 @@ static int csi2rx_probe(struct platform_device *pdev)
err_cleanup:
v4l2_async_nf_unregister(&csi2rx->notifier);
v4l2_async_nf_cleanup(&csi2rx->notifier);
+ media_entity_cleanup(&csi2rx->subdev.entity);
err_free_priv:
kfree(csi2rx);
return ret;
@@ -483,6 +484,7 @@ static int csi2rx_remove(struct platform_device *pdev)
v4l2_async_nf_unregister(&csi2rx->notifier);
v4l2_async_nf_cleanup(&csi2rx->notifier);
v4l2_async_unregister_subdev(&csi2rx->subdev);
+ media_entity_cleanup(&csi2rx->subdev.entity);
kfree(csi2rx);
return 0;
--
2.34.1
^ permalink raw reply related
* [PATCH v6 01/14] media: cadence: csi2rx: Unregister v4l2 async notifier
From: Pratyush Yadav @ 2022-01-21 14:28 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
In-Reply-To: <20220121142904.4091481-1-p.yadav@ti.com>
The notifier is added to the global notifier list when registered. When
the module is removed, the struct csi2rx_priv in which the notifier is
embedded, is destroyed. As a result the notifier list has a reference to
a notifier that no longer exists. This causes invalid memory accesses
when the list is iterated over. Similar for when the probe fails.
Unregister and clean up the notifier to avoid this.
Fixes: 1fc3b37f34f6 ("media: v4l: cadence: Add Cadence MIPI-CSI2 RX driver")
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
(no changes since v5)
Changes in v5:
- Cleanup notifier in csi2rx_parse_dt() after the call to
v4l2_async_nf_add_fwnode_remote().
Changes in v3:
- New in v3.
drivers/media/platform/cadence/cdns-csi2rx.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
index cc3ebb0d96f6..2a23da6a0b8e 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -404,8 +404,10 @@ static int csi2rx_parse_dt(struct csi2rx_priv *csi2rx)
asd = v4l2_async_nf_add_fwnode_remote(&csi2rx->notifier, fwh,
struct v4l2_async_subdev);
of_node_put(ep);
- if (IS_ERR(asd))
+ if (IS_ERR(asd)) {
+ v4l2_async_nf_cleanup(&csi2rx->notifier);
return PTR_ERR(asd);
+ }
csi2rx->notifier.ops = &csi2rx_notifier_ops;
@@ -467,6 +469,7 @@ static int csi2rx_probe(struct platform_device *pdev)
return 0;
err_cleanup:
+ v4l2_async_nf_unregister(&csi2rx->notifier);
v4l2_async_nf_cleanup(&csi2rx->notifier);
err_free_priv:
kfree(csi2rx);
@@ -477,6 +480,8 @@ static int csi2rx_remove(struct platform_device *pdev)
{
struct csi2rx_priv *csi2rx = platform_get_drvdata(pdev);
+ v4l2_async_nf_unregister(&csi2rx->notifier);
+ v4l2_async_nf_cleanup(&csi2rx->notifier);
v4l2_async_unregister_subdev(&csi2rx->subdev);
kfree(csi2rx);
--
2.34.1
^ permalink raw reply related
* [PATCH v6 06/14] media: cadence: csi2rx: Set the STOP bit when stopping a stream
From: Pratyush Yadav @ 2022-01-21 14:28 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
In-Reply-To: <20220121142904.4091481-1-p.yadav@ti.com>
The stream stop procedure says that the STOP bit should be set when the
stream is to be stopped, and then the ready bit in stream status
register polled to make sure the STOP operation is finished.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
(no changes since v5)
Changes in v5:
- Change %d to %u
- Add Laurent's R-by.
drivers/media/platform/cadence/cdns-csi2rx.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
index 346afb3578ac..5cc18fe0f1b9 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -8,6 +8,7 @@
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/io.h>
+#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
@@ -40,8 +41,12 @@
#define CSI2RX_STREAM_CTRL_REG(n) (CSI2RX_STREAM_BASE(n) + 0x000)
#define CSI2RX_STREAM_CTRL_SOFT_RST BIT(4)
+#define CSI2RX_STREAM_CTRL_STOP BIT(1)
#define CSI2RX_STREAM_CTRL_START BIT(0)
+#define CSI2RX_STREAM_STATUS_REG(n) (CSI2RX_STREAM_BASE(n) + 0x004)
+#define CSI2RX_STREAM_STATUS_RDY BIT(31)
+
#define CSI2RX_STREAM_DATA_CFG_REG(n) (CSI2RX_STREAM_BASE(n) + 0x008)
#define CSI2RX_STREAM_DATA_CFG_EN_VC_SELECT BIT(31)
#define CSI2RX_STREAM_DATA_CFG_VC_SELECT(n) BIT((n) + 16)
@@ -305,12 +310,23 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx)
static void csi2rx_stop(struct csi2rx_priv *csi2rx)
{
unsigned int i;
+ u32 val;
+ int ret;
clk_prepare_enable(csi2rx->p_clk);
clk_disable_unprepare(csi2rx->sys_clk);
for (i = 0; i < csi2rx->max_streams; i++) {
- writel(0, csi2rx->base + CSI2RX_STREAM_CTRL_REG(i));
+ writel(CSI2RX_STREAM_CTRL_STOP,
+ csi2rx->base + CSI2RX_STREAM_CTRL_REG(i));
+
+ ret = readl_relaxed_poll_timeout(csi2rx->base +
+ CSI2RX_STREAM_STATUS_REG(i),
+ val,
+ (val & CSI2RX_STREAM_STATUS_RDY),
+ 10, 10000);
+ if (ret)
+ dev_warn(csi2rx->dev, "Failed to stop stream%u\n", i);
clk_disable_unprepare(csi2rx->pixel_clk[i]);
}
--
2.34.1
^ permalink raw reply related
* [PATCH v6 00/14] CSI2RX support on J721E
From: Pratyush Yadav @ 2022-01-21 14:28 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
Hi,
This series adds support for CSI2 capture on J721E. It includes some
fixes to the Cadence CSI2RX driver, re-structures the TI platform
drivers, and finally adds the TI CSI2RX wrapper driver.
This series used to include the DPHY and DMA engine patches as well, but
they have been split off to facilitate easier merging.
Tested on TI's J721E with OV5640 sensor.
The branch with all the patches needed to enable testing (dts nodes,
OV5640 dropped patch, etc.) can be found here at
https://github.com/prati0100/linux-next/ branch "capture".
Changes in v6:
- Move the lock around the dereference for framefmt in
csi2rx_{get,set}_fmt() instead of when we get the pointer.
- Do not return an error when an unsupported format is set. Instead
adjust the code to the first format in the list.
- Drop variable bpp and use fmt->bpp directly.
- Drop variable got_pm. Call phy_pm_runtime_put() unconditionally since
it will just return an error if runtime PM is not enabled.
- Drop transcoding from the commit message.
- Make csi2rx_media_ops const.
Changes in v5:
- Cleanup notifier in csi2rx_parse_dt() after the call to
v4l2_async_nf_add_fwnode_remote().
- Use YUV 1X16 formats instead of 2X8.
- Only error out when phy_pm_runtime_get_sync() returns a negative
value. A positive value can be returned if the phy was already
resumed.
- Do not query the source subdev for format. Use the newly added
internal format instead.
- Make i unsigned.
- Change %d to %u
- Add dependency on PHY_CADENCE_DPHY_RX instead of PHY_CADENCE_DPHY
since the Rx mode DPHY now has a separate driver.
- Drop ti_csi2rx_validate_pipeline(). Pipeline validation should be done
at media_pipeline_start().
- Do not assign flags.
- Fix error handling in ti_csi2rx_start_streaming(). Free up vb2 buffers
when media_pipeline_start() fails.
- Move clock description in comments under the clocks property.
- Make ports required.
- Add link validation to cdns-csi2rx driver.
Changes in v4:
- Drop the call to set PHY submode. It is now being done via compatible
on the DPHY side.
- Acquire the media device's graph_mutex before starting the graph walk.
- Call media_graph_walk_init() and media_graph_walk_cleanup() when
starting and ending the graph walk respectively.
- Reduce max frame height and width in enum_framesizes. Currently they
are set to UINT_MAX but they must be a multiple of step_width, so they
need to be rounded down. Also, these values are absurdly large which
causes some userspace applications like gstreamer to trip up. While it
is not generally right to change the kernel for an application bug, it
is not such a big deal here. This change is replacing one set of
absurdly large arbitrary values with another set of smaller but still
absurdly large arbitrary values. Both limits are unlikely to be hit in
practice.
- Add power-domains property.
- Drop maxItems from clock-names.
- Drop the type for data-lanes.
- Drop uniqueItems from data-lanes. Move it to video-interfaces.yaml
instead.
- Drop OV5640 runtime pm patch. It seems to be a bit complicated and it
is not exactly necessary for this series. Any CSI-2 camera will work
just fine, OV5640 just happens to be the one I tested with. I don't
want it to block this series. I will submit it as a separate patch
later.
Changes in v3:
- Use v4l2_get_link_freq() to calculate pixel clock.
- Move DMA related fields in struct ti_csi2rx_dma.
- Protect DMA buffer queue with a spinlock to make sure the queue buffer
and DMA callback don't race on it.
- Track the current DMA state. It might go idle because of a lack of
buffers. This state can be used to restart it if needed.
- Do not include the current buffer in the pending queue. It is slightly
better modelling than leaving it at the head of the pending queue.
- Use the buffer as the callback argument, and add a reference to csi in it.
- If queueing a buffer to DMA fails, the buffer gets leaked and DMA gets
stalled with. Instead, report the error to vb2 and queue the next
buffer in the pending queue.
- DMA gets stalled if we run out of buffers since the callback is the
only one that fires subsequent transfers and it is no longer being
called. Check for that when queueing buffers and restart DMA if
needed.
- Do not put of node until we are done using the fwnode.
- Set inital format to UYVY 640x480.
- Add compatible: contains: const: cdns,csi2rx to allow SoC specific
compatible.
- Add more constraints for data-lanes property.
Changes in v2:
- Use phy_pm_runtime_get_sync() and phy_pm_runtime_put() before making
calls to set PHY mode, etc. to make sure it is ready.
- Use dmaengine_get_dma_device() instead of directly accessing
dma->device->dev.
- Do not set dst_addr_width when configuring slave DMA.
- Move to a separate subdir and rename to j721e-csi2rx.c
- Convert compatible to ti,j721e-csi2rx.
- Move to use Media Controller centric APIs.
- Improve cleanup in probe when one of the steps fails.
- Add colorspace to formats database.
- Set hw_revision on media_device.
- Move video device initialization to probe time instead of register time.
- Rename to ti,j721e-csi2rx.yaml
- Add an entry in MAINTAINERS.
- Add a description for the binding.
- Change compatible to ti,j721e-csi2rx to make it SoC specific.
- Remove description from dmas, reg, power-domains.
- Remove a limit of 2 from #address-cells and #size-cells.
- Fix add ^ to csi-bridge subnode regex.
- Make ranges mandatory.
- Add unit address in example.
- Add a reference to cdns,csi2rx in csi-bridge subnode.
- Expand the example to include the csi-bridge subnode as well.
- Re-order subject prefixes.
- Convert OV5640 to use runtime PM and drop Cadence CSI2RX s_power patch.
- Drop subdev call wrappers from cdns-csi2rx.
- Move VPE and CAL to a separate subdir.
- Rename ti-csi2rx.c to j721e-csi2rx.c
Pratyush Yadav (14):
media: cadence: csi2rx: Unregister v4l2 async notifier
media: cadence: csi2rx: Cleanup media entity properly
media: cadence: csi2rx: Add get_fmt and set_fmt pad ops
media: cadence: csi2rx: Add external DPHY support
media: cadence: csi2rx: Soft reset the streams before starting capture
media: cadence: csi2rx: Set the STOP bit when stopping a stream
media: cadence: csi2rx: Fix stream data configuration
media: cadence: csi2rx: Populate subdev devnode
media: cadence: csi2rx: Add link validation
media: Re-structure TI platform drivers
media: ti: Add CSI2RX support for J721E
media: dt-bindings: Make sure items in data-lanes are unique
media: dt-bindings: Add DT bindings for TI J721E CSI2RX driver
media: dt-bindings: Convert Cadence CSI2RX binding to YAML
.../devicetree/bindings/media/cdns,csi2rx.txt | 100 --
.../bindings/media/cdns,csi2rx.yaml | 176 ++++
.../bindings/media/ti,j721e-csi2rx.yaml | 101 ++
.../bindings/media/video-interfaces.yaml | 1 +
MAINTAINERS | 10 +-
drivers/media/platform/Kconfig | 12 +
drivers/media/platform/Makefile | 2 +-
drivers/media/platform/cadence/cdns-csi2rx.c | 274 +++++-
drivers/media/platform/ti/Makefile | 4 +
drivers/media/platform/ti/cal/Makefile | 3 +
.../{ti-vpe => ti/cal}/cal-camerarx.c | 0
.../platform/{ti-vpe => ti/cal}/cal-video.c | 0
.../media/platform/{ti-vpe => ti/cal}/cal.c | 0
.../media/platform/{ti-vpe => ti/cal}/cal.h | 0
.../platform/{ti-vpe => ti/cal}/cal_regs.h | 0
.../media/platform/ti/j721e-csi2rx/Makefile | 2 +
.../platform/ti/j721e-csi2rx/j721e-csi2rx.c | 913 ++++++++++++++++++
.../platform/{ti-vpe => ti/vpe}/Makefile | 4 -
.../media/platform/{ti-vpe => ti/vpe}/csc.c | 0
.../media/platform/{ti-vpe => ti/vpe}/csc.h | 0
.../media/platform/{ti-vpe => ti/vpe}/sc.c | 0
.../media/platform/{ti-vpe => ti/vpe}/sc.h | 0
.../platform/{ti-vpe => ti/vpe}/sc_coeff.h | 0
.../media/platform/{ti-vpe => ti/vpe}/vpdma.c | 0
.../media/platform/{ti-vpe => ti/vpe}/vpdma.h | 0
.../platform/{ti-vpe => ti/vpe}/vpdma_priv.h | 0
.../media/platform/{ti-vpe => ti/vpe}/vpe.c | 0
.../platform/{ti-vpe => ti/vpe}/vpe_regs.h | 0
28 files changed, 1481 insertions(+), 121 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/media/cdns,csi2rx.txt
create mode 100644 Documentation/devicetree/bindings/media/cdns,csi2rx.yaml
create mode 100644 Documentation/devicetree/bindings/media/ti,j721e-csi2rx.yaml
create mode 100644 drivers/media/platform/ti/Makefile
create mode 100644 drivers/media/platform/ti/cal/Makefile
rename drivers/media/platform/{ti-vpe => ti/cal}/cal-camerarx.c (100%)
rename drivers/media/platform/{ti-vpe => ti/cal}/cal-video.c (100%)
rename drivers/media/platform/{ti-vpe => ti/cal}/cal.c (100%)
rename drivers/media/platform/{ti-vpe => ti/cal}/cal.h (100%)
rename drivers/media/platform/{ti-vpe => ti/cal}/cal_regs.h (100%)
create mode 100644 drivers/media/platform/ti/j721e-csi2rx/Makefile
create mode 100644 drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c
rename drivers/media/platform/{ti-vpe => ti/vpe}/Makefile (78%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/csc.c (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/csc.h (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/sc.c (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/sc.h (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/sc_coeff.h (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/vpdma.c (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/vpdma.h (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/vpdma_priv.h (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/vpe.c (100%)
rename drivers/media/platform/{ti-vpe => ti/vpe}/vpe_regs.h (100%)
--
2.34.1
^ permalink raw reply
* [PATCH v6 03/14] media: cadence: csi2rx: Add get_fmt and set_fmt pad ops
From: Pratyush Yadav @ 2022-01-21 14:28 UTC (permalink / raw)
To: Mauro Carvalho Chehab
Cc: Pratyush Yadav, Laurent Pinchart, Nikhil Devshatwar,
Tomi Valkeinen, Benoit Parrot, Maxime Ripard, Rob Herring,
Sakari Ailus, Niklas Söderlund, devicetree, linux-kernel,
linux-media
In-Reply-To: <20220121142904.4091481-1-p.yadav@ti.com>
The format is needed to calculate the link speed for the external DPHY
configuration. It is not right to query the format from the source
subdev. Add get_fmt and set_fmt pad operations so that the format can be
configured and correct bpp be selected.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
---
Changes in v6:
- Move the lock around the dereference for framefmt in
csi2rx_{get,set}_fmt() instead of when we get the pointer.
- Do not return an error when an unsupported format is set. Instead
adjust the code to the first format in the list.
- Not adding Laurent's R-by since I am making changes in
csi2rx_set_fmt() that he didn't explicitly recommend.
Changes in v5:
- Use YUV 1X16 formats instead of 2X8.
- New in v5.
drivers/media/platform/cadence/cdns-csi2rx.c | 131 +++++++++++++++++++
1 file changed, 131 insertions(+)
diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
index 2547903f2e8e..ae3ebdb3890d 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -54,6 +54,11 @@ enum csi2rx_pads {
CSI2RX_PAD_MAX,
};
+struct csi2rx_fmt {
+ u32 code;
+ u8 bpp;
+};
+
struct csi2rx_priv {
struct device *dev;
unsigned int count;
@@ -79,12 +84,43 @@ struct csi2rx_priv {
struct v4l2_subdev subdev;
struct v4l2_async_notifier notifier;
struct media_pad pads[CSI2RX_PAD_MAX];
+ struct v4l2_mbus_framefmt fmt;
/* Remote source */
struct v4l2_subdev *source_subdev;
int source_pad;
};
+static const struct csi2rx_fmt formats[] = {
+ {
+ .code = MEDIA_BUS_FMT_YUYV8_1X16,
+ .bpp = 16,
+ },
+ {
+ .code = MEDIA_BUS_FMT_UYVY8_1X16,
+ .bpp = 16,
+ },
+ {
+ .code = MEDIA_BUS_FMT_YVYU8_1X16,
+ .bpp = 16,
+ },
+ {
+ .code = MEDIA_BUS_FMT_VYUY8_1X16,
+ .bpp = 16,
+ },
+};
+
+static const struct csi2rx_fmt *csi2rx_get_fmt_by_code(u32 code)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(formats); i++)
+ if (formats[i].code == code)
+ return &formats[i];
+
+ return NULL;
+}
+
static inline
struct csi2rx_priv *v4l2_subdev_to_csi2rx(struct v4l2_subdev *subdev)
{
@@ -236,12 +272,103 @@ static int csi2rx_s_stream(struct v4l2_subdev *subdev, int enable)
return ret;
}
+static struct v4l2_mbus_framefmt *
+csi2rx_get_pad_format(struct csi2rx_priv *csi2rx,
+ struct v4l2_subdev_state *state,
+ unsigned int pad, u32 which)
+{
+ switch (which) {
+ case V4L2_SUBDEV_FORMAT_TRY:
+ return v4l2_subdev_get_try_format(&csi2rx->subdev, state, pad);
+ case V4L2_SUBDEV_FORMAT_ACTIVE:
+ return &csi2rx->fmt;
+ default:
+ return NULL;
+ }
+}
+
+static int csi2rx_get_fmt(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_format *format)
+{
+ struct csi2rx_priv *csi2rx = v4l2_subdev_to_csi2rx(subdev);
+ struct v4l2_mbus_framefmt *framefmt;
+
+ framefmt = csi2rx_get_pad_format(csi2rx, state, format->pad,
+ format->which);
+ if (!framefmt)
+ return -EINVAL;
+
+ mutex_lock(&csi2rx->lock);
+ format->format = *framefmt;
+ mutex_unlock(&csi2rx->lock);
+
+ return 0;
+}
+
+static int csi2rx_set_fmt(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_format *format)
+{
+ struct csi2rx_priv *csi2rx = v4l2_subdev_to_csi2rx(subdev);
+ struct v4l2_mbus_framefmt *framefmt;
+
+ /* No transcoding, source and sink formats must match. */
+ if (format->pad != CSI2RX_PAD_SINK)
+ return csi2rx_get_fmt(subdev, state, format);
+
+ if (!csi2rx_get_fmt_by_code(format->format.code))
+ format->format.code = formats[0].code;
+
+ format->format.field = V4L2_FIELD_NONE;
+
+ framefmt = csi2rx_get_pad_format(csi2rx, state, format->pad,
+ format->which);
+ if (!framefmt)
+ return -EINVAL;
+
+ mutex_lock(&csi2rx->lock);
+ *framefmt = format->format;
+ mutex_unlock(&csi2rx->lock);
+
+ return 0;
+}
+
+static int csi2rx_init_cfg(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_state *state)
+{
+ struct v4l2_subdev_format format = {
+ .which = state ? V4L2_SUBDEV_FORMAT_TRY
+ : V4L2_SUBDEV_FORMAT_ACTIVE,
+ .pad = CSI2RX_PAD_SINK,
+ .format = {
+ .width = 640,
+ .height = 480,
+ .code = MEDIA_BUS_FMT_UYVY8_1X16,
+ .field = V4L2_FIELD_NONE,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .ycbcr_enc = V4L2_YCBCR_ENC_601,
+ .quantization = V4L2_QUANTIZATION_LIM_RANGE,
+ .xfer_func = V4L2_XFER_FUNC_SRGB,
+ },
+ };
+
+ return csi2rx_set_fmt(subdev, state, &format);
+}
+
+static const struct v4l2_subdev_pad_ops csi2rx_pad_ops = {
+ .get_fmt = csi2rx_get_fmt,
+ .set_fmt = csi2rx_set_fmt,
+ .init_cfg = csi2rx_init_cfg,
+};
+
static const struct v4l2_subdev_video_ops csi2rx_video_ops = {
.s_stream = csi2rx_s_stream,
};
static const struct v4l2_subdev_ops csi2rx_subdev_ops = {
.video = &csi2rx_video_ops,
+ .pad = &csi2rx_pad_ops,
};
static int csi2rx_async_bound(struct v4l2_async_notifier *notifier,
@@ -457,6 +584,10 @@ static int csi2rx_probe(struct platform_device *pdev)
if (ret)
goto err_cleanup;
+ ret = csi2rx_init_cfg(&csi2rx->subdev, NULL);
+ if (ret)
+ goto err_cleanup;
+
ret = v4l2_async_register_subdev(&csi2rx->subdev);
if (ret < 0)
goto err_cleanup;
--
2.34.1
^ permalink raw reply related
* Re: [PATCH v14 0/3] mmc: Add LiteSDCard mmc driver
From: Ulf Hansson @ 2022-01-21 14:28 UTC (permalink / raw)
To: Gabriel L. Somlo
Cc: linux-kernel, robh+dt, devicetree, linux-mmc, kgugala, mholenko,
krakoczy, mdudek, paulus, joel, shorne, geert,
david.abdurachmanov, florent, rdunlap, andy.shevchenko, hdanton
In-Reply-To: <Yeq4ej2RAWgDZMp1@errol.ini.cmu.edu>
On Fri, 21 Jan 2022 at 14:43, Gabriel L. Somlo <gsomlo@gmail.com> wrote:
>
> On Thu, Jan 13, 2022 at 12:02:57PM -0500, Gabriel Somlo wrote:
> > Add support for the LiteX SD-Card device, LiteSDCard.
> >
> > LiteSDCard is a simple SD-Card interface available as part of the LiteX
> > environment, used with various RISC-V and other FPGA based SoCs.
> >
> > New in v14:
> > Documentation/devicetree/bindings/mmc/litex,mmc.yaml:
> > - add missing `vmmc-supply = ...` property to example section
> >
> > >New in v13:
> > >Documentation/devicetree/bindings/mmc/litex,mmc.yaml:
> > > - add `vmmc-supply` requirement
> > >drivers/mmc/host/Kconfig:
> > > - add dependency on REGULATOR, REGULATOR_FIXED_VOLTAGE
> > >drivers/mmc/host/litex_mmc.c:
> > > - use `mmc_regulator_get_supply()`, with fallback to hardcoded 3.3V
>
>
> Ping?
Please don't ping during the merge window, unless it's a fix.
Although, as I have already started to prepare for applying a slew of
patches, I can let you know that this series is going to be applied on
Monday, when rc1 is out.
Kind regards
Uffe
>
>
> > >>New in v12:
> > >>drivers/mmc/host/Kconfig:
> > >> - add dependency on HAVE_CLK for litex_mmc driver
> > >> - (re)add "If unsure, say N" to the litex_mmc driver help message
> > >>drivers/mmc/host/litex_mmc.c:
> > >> - prints message using dev_info() before returning success from probe()
> > >>
> > >>>New in v11:
> > >>> - picked up r/b from Andy
> > >>>drivers/mmc/host/litex_mmc.c:
> > >>> - defensive coding of litex_mmc_interrupt() return logic
> > >>> - remove `dev` member of `struct litex_mmc_host`, only used during probe
> > >>>
> > >>>>New in v10:
> > >>>>drivers/mmc/host/litex_mmc.c:
> > >>>> - group `linux/mmc/*` includes by themselves
> > >>>> - clean-up of `return` style (multiple locations throughout source)
> > >>>> - create `mmc_free_host()` wrapper for use with
> > >>>> `devm_add_action_or_reset()`
> > >>>> - use GFP_KERNEL with `dmam_alloc_coherent()`
> > >>>>
> > >>>>>New in v9:
> > >>>>>drivers/mmc/host/Kconfig:
> > >>>>> - fix OF dependency
> > >>>>>drivers/mmc/host/litex_mmc.c:
> > >>>>> - remove `linux/of.h` include, no longer needed since dropping
> > >>>>> `of_match_ptr()`
> > >>>>> - add `linux/mod_devicetable.h` include
> > >>>>> - use devm_action_or_reset() to devm-ify mmc_alloc_host(), and obviate
> > >>>>> the need to call mmc_free_host() explicitly during either probe()
> > >>>>> error path or during remove()
> > >>>>>
> > >>>>>>New in v8:
> > >>>>>>commit blurbs:
> > >>>>>> - cosmetic editing of descriptions
> > >>>>>> - removed `Cc:` lines
> > >>>>>>drivers/mmc/host/litex_mmc.c:
> > >>>>>> - fix file header comment (for real, this time)
> > >>>>>> - add explicit `bits.h` include
> > >>>>>> - remove `of_match_ptr()` wrapper from around .of_match_table argument
> > >>>>>> - fix devm ordering issues: use `devm_request_irq()`, which precludes
> > >>>>>> the need to call `free_irq()` on `probe()` error path or from `remove()`
> > >>>>>>
> > >>>>>>>New in v7:
> > >>>>>>>
> > >>>>>>>drivers/mmc/host/Kconfig:
> > >>>>>>> - added module name in LiteSDCard Kconfig entry
> > >>>>>>>
> > >>>>>>>drivers/mmc/host/litex_mmc.c:
> > >>>>>>> - fixed comment formatting, ordering, and capitalization throughout
> > >>>>>>> the entire file
> > >>>>>>> - sorted header #include statements
> > >>>>>>> - removed redundant parantheses in readx_poll_timeout() condition
> > >>>>>>> - explicit handling of readx_poll_timeout() timeout scenarios
> > >>>>>>> - dev_err() used in litex_mmc_sdcard_wait_done()
> > >>>>>>> - use memcpy_fromio() to grab command response
> > >>>>>>> - no need to apply 0xffff mask to a 32-bit value right-shifted by 16
> > >>>>>>> (host->resp[3])
> > >>>>>>> - use clamp() instead of min(max(...)...)
> > >>>>>>> - reworked platform_get_irq_optional() error handling logic
> > >>>>>>> - no need to explicitly zero host->irq, kzalloc() does that already
> > >>>>>>> - added missing free_irq() in litex_mmc_probe() error path
> > >>>>>>> - reordered calls inside litex_mmc_remove() (calling mmc_free_host()
> > >>>>>>> before free_irq()
> > >>>>>>>
> > >>>>>>>>New in v6:
> > >>>>>>>>
> > >>>>>>>>drivers/mmc/host/litex_mmc.c:
> > >>>>>>>> - fix handling of deferred probe vs. platform_get_irq_optional()
> > >>>>>>>> - don't #ifdef dma_set_mask_and_coherent(), since it automatically
> > >>>>>>>> does the right thing on both 32- and 64-bit DMA capable arches
> > >>>>>>>> - remove MMC_CAP2_FULL_PWR_CYCLE, add MMC_CAP2_NO_MMC to list of
> > >>>>>>>> hardcoded capabilities during litex_mmc_probe()
> > >>>>>>>> - hardcode mmc->ocr_avail to the full 2.7-3.6V range allowed by the
> > >>>>>>>> SDCard spec (the LiteSDCard device doesn't accept software
> > >>>>>>>> configuration)
> > >>>>>>>>
> > >>>>>>>>>New in v5:
> > >>>>>>>>>
> > >>>>>>>>>MAINTAINERS:
> > >>>>>>>>>
> > >>>>>>>>> - picked up a/b Mateusz
> > >>>>>>>>>
> > >>>>>>>>>Doc/dt/bindings/mmc/litex,mmc.yaml:
> > >>>>>>>>>
> > >>>>>>>>> - picked up r/b Rob, Joel
> > >>>>>>>>>
> > >>>>>>>>>drivers/mmc/host/litex_mmc.c:
> > >>>>>>>>>
> > >>>>>>>>> - shorten #define constant names (cosmetic, make them less unwieldy)
> > >>>>>>>>> - picked up r/b Joel
> > >>>>>>>>>
> > >>>>>>>>>>New in v4:
> > >>>>>>>>>>
> > >>>>>>>>>>Doc/dt/bindings/mmc/litex,mmc.yaml:
> > >>>>>>>>>>
> > >>>>>>>>>> - fixed `dt_binding_check` errors uncovered by Rob's script
> > >>>>>>>>>>
> > >>>>>>>>>>drivers/mmc/host/litex_mmc.c:
> > >>>>>>>>>>
> > >>>>>>>>>> - struct litex_mmc_host fields re-ordered so that `pahole` reports
> > >>>>>>>>>> no holes in either 32- or 64-bit builds
> > >>>>>>>>>> - litex_mmc_set_bus_width() now encapsulates check for
> > >>>>>>>>>> host->is_bus_width_set
> > >>>>>>>>>> - litex_mmc_request() - factor out dma data setup into separate
> > >>>>>>>>>> helper function: litex_mmc_do_dma()
> > >>>>>>>>>>
> > >>>>>>>>>>>New in v3:
> > >>>>>>>>>>>
> > >>>>>>>>>>> MAINTAINERS:
> > >>>>>>>>>>>
> > >>>>>>>>>>> - picked up acked-by Joel
> > >>>>>>>>>>> - added listing for liteeth driver
> > >>>>>>>>>>> - added Joel as additional co-maintainer (thanks!)
> > >>>>>>>>>>>
> > >>>>>>>>>>> Doc/dt/bindings/mmc/litex,mmc.yaml:
> > >>>>>>>>>>>
> > >>>>>>>>>>> - picked up r/b Geert Uytterhoeven <geert@linux-m68k.org> in DT
> > >>>>>>>>>>> bindings document (please let me know if that was premature, and
> > >>>>>>>>>>> happy to take further review if needed :)
> > >>>>>>>>>>> - add dedicated DT property for source clock frequency
> > >>>>>>>>>>>
> > >>>>>>>>>>> drivers/mmc/host/litex_mmc.c:
> > >>>>>>>>>>>
> > >>>>>>>>>>> - fixed function signature (no line split), and naming (litex_mmc_*)
> > >>>>>>>>>>> - more informative MODULE_AUTHOR() entries
> > >>>>>>>>>>> - also added matching "Copyright" entries in file header
> > >>>>>>>>>>> - fixed description in Kconfig
> > >>>>>>>>>>> - fixed DT documentation
> > >>>>>>>>>>> - removed magic constants
> > >>>>>>>>>>> - removed litex_map_status(), have sdcard_wait_done() return *real*
> > >>>>>>>>>>> error codes directly instead.
> > >>>>>>>>>>> - streamlined litex_mmc_reponse_len()
> > >>>>>>>>>>> - call litex_mmc_set_bus_width() only once, and ensure it returns
> > >>>>>>>>>>> correct error code(s)
> > >>>>>>>>>>> - use readx_poll_timeout() -- more concise -- instead of
> > >>>>>>>>>>> read_poll_timeout()
> > >>>>>>>>>>> - use dev_err() in litex_mmc_send_cmd() (instead of pr_err())
> > >>>>>>>>>>> - litex_mmc_setclk() will update host->clock before returning
> > >>>>>>>>>>> - separate irq initialization into its own function,
> > >>>>>>>>>>> litex_mmc_irq_init()
> > >>>>>>>>>>> - document rationale for f_min, f_max
> > >>>>>>>>>>> - use dmam_alloc_coherent(), which simplifies cleanup significantly
> > >>>>>>>>>>> - large `if (data) { ... }` block in litex_mmc_request() left as-is,
> > >>>>>>>>>>> there are too many variables shared with the rest of the parent
> > >>>>>>>>>>> function body to easily separate (e.g., `len`, `transfer`, `direct`).
> > >>>>>>>>>>> If this is indeed a blocker, I can take another shot at refactoring
> > >>>>>>>>>>> it in a future revision!
> > >>>>>>>>>>> - bump dma_set_mask_and_coherent() to 64-bits on suitable
> > >>>>>>>>>>> architectures
> > >>>>>>>>>>> - clock source picked up from dedicated DT clock reference property
> > >>>>>>>>>>> - remove gpio card-detect logic (needs testing and a dt binding
> > >>>>>>>>>>> example before being eligible for upstream inclusion)
> > >>>>>>>>>>>
> > >>>>>>>>>>>> New in v2:
> > >>>>>>>>>>>> - reword info message in litex_set_clk()
> > >>>>>>>>>>>> - streamline code in litex_map_status()
> > >>>>>>>>>>>> - fix typos in Kconfig (thanks Randy Dunlap <rdunlap@infradead.org>)
> > >>>>>>>>>>>> - improvements suggested by Stafford Horne <shorne@gmail.com>
> > >>>>>>>>>>>> - allow COMPILE_TEST in Kconfig
> > >>>>>>>>>>>> - use read_poll_timeout() when waiting for cmd/data/DMA
> > >>>>>>>>>>>> xfer completion
> > >>>>>>>>>>>> - include interrupt.h (thanks kernel test robot <lkp@intel.com>)
> >
> > Gabriel Somlo (3):
> > MAINTAINERS: co-maintain LiteX platform
> > dt-bindings: mmc: Add bindings for LiteSDCard
> > mmc: Add driver for LiteX's LiteSDCard interface
> >
> > .../devicetree/bindings/mmc/litex,mmc.yaml | 78 +++
> > MAINTAINERS | 9 +-
> > drivers/mmc/host/Kconfig | 13 +
> > drivers/mmc/host/Makefile | 1 +
> > drivers/mmc/host/litex_mmc.c | 661 ++++++++++++++++++
> > 5 files changed, 760 insertions(+), 2 deletions(-)
> > create mode 100644 Documentation/devicetree/bindings/mmc/litex,mmc.yaml
> > create mode 100644 drivers/mmc/host/litex_mmc.c
> >
> > --
> > 2.31.1
> >
^ permalink raw reply
* [PATCH v3 1/3] iio: dac: add support for ltc2688
From: Nuno Sá @ 2022-01-21 14:24 UTC (permalink / raw)
To: linux-iio, devicetree
Cc: Rob Herring, Jonathan Cameron, Lars-Peter Clausen,
Michael Hennerich
In-Reply-To: <20220121142501.151-1-nuno.sa@analog.com>
The LTC2688 is a 16 channel, 16 bit, +-15V DAC with an integrated
precision reference. It is guaranteed monotonic and has built in
rail-to-rail output buffers that can source or sink up to 20 mA.
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
---
MAINTAINERS | 7 +
drivers/iio/dac/Kconfig | 11 +
drivers/iio/dac/Makefile | 1 +
drivers/iio/dac/ltc2688.c | 1070 +++++++++++++++++++++++++++++++++++++
4 files changed, 1089 insertions(+)
create mode 100644 drivers/iio/dac/ltc2688.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 78881bbaf3c0..419b181f4749 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11190,6 +11190,13 @@ S: Maintained
F: Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml
F: drivers/iio/dac/ltc1660.c
+LTC2688 IIO DAC DRIVER
+M: Nuno Sá <nuno.sa@analog.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: drivers/iio/dac/ltc2688.c
+
LTC2947 HARDWARE MONITOR DRIVER
M: Nuno Sá <nuno.sa@analog.com>
L: linux-hwmon@vger.kernel.org
diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig
index bfcf7568de32..c0bf0d84197f 100644
--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -131,6 +131,17 @@ config AD5624R_SPI
Say yes here to build support for Analog Devices AD5624R, AD5644R and
AD5664R converters (DAC). This driver uses the common SPI interface.
+config LTC2688
+ tristate "Analog Devices LTC2688 DAC spi driver"
+ depends on SPI
+ select REGMAP
+ help
+ Say yes here to build support for Analog Devices
+ LTC2688 converters (DAC).
+
+ To compile this driver as a module, choose M here: the
+ module will be called ltc2688.
+
config AD5686
tristate
diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile
index 01a50131572f..ec3e42713f00 100644
--- a/drivers/iio/dac/Makefile
+++ b/drivers/iio/dac/Makefile
@@ -35,6 +35,7 @@ obj-$(CONFIG_DS4424) += ds4424.o
obj-$(CONFIG_LPC18XX_DAC) += lpc18xx_dac.o
obj-$(CONFIG_LTC1660) += ltc1660.o
obj-$(CONFIG_LTC2632) += ltc2632.o
+obj-$(CONFIG_LTC2688) += ltc2688.o
obj-$(CONFIG_M62332) += m62332.o
obj-$(CONFIG_MAX517) += max517.o
obj-$(CONFIG_MAX5821) += max5821.o
diff --git a/drivers/iio/dac/ltc2688.c b/drivers/iio/dac/ltc2688.c
new file mode 100644
index 000000000000..179a653ce972
--- /dev/null
+++ b/drivers/iio/dac/ltc2688.c
@@ -0,0 +1,1070 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * LTC2688 16 channel, 16 bit Voltage Output SoftSpan DAC driver
+ *
+ * Copyright 2021 Analog Devices Inc.
+ */
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/limits.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+
+#define LTC2688_DAC_CHANNELS 16
+
+#define LTC2688_CMD_CH_CODE(x) (0x00 + (x))
+#define LTC2688_CMD_CH_SETTING(x) (0x10 + (x))
+#define LTC2688_CMD_CH_OFFSET(x) (0X20 + (x))
+#define LTC2688_CMD_CH_GAIN(x) (0x30 + (x))
+#define LTC2688_CMD_CH_CODE_UPDATE(x) (0x40 + (x))
+
+#define LTC2688_CMD_CONFIG 0x70
+#define LTC2688_CMD_POWERDOWN 0x71
+#define LTC2688_CMD_A_B_SELECT 0x72
+#define LTC2688_CMD_SW_TOGGLE 0x73
+#define LTC2688_CMD_TOGGLE_DITHER_EN 0x74
+#define LTC2688_CMD_THERMAL_STAT 0x77
+#define LTC2688_CMD_UPDATE_ALL 0x7C
+#define LTC2688_CMD_NOOP 0xFF
+
+#define LTC2688_READ_OPERATION 0x80
+
+/* Channel Settings */
+#define LTC2688_CH_SPAN_MSK GENMASK(2, 0)
+#define LTC2688_CH_OVERRANGE_MSK BIT(3)
+#define LTC2688_CH_TD_SEL_MSK GENMASK(5, 4)
+#define LTC2688_CH_TGP_MAX 3
+#define LTC2688_CH_DIT_PER_MSK GENMASK(8, 6)
+#define LTC2688_CH_DIT_PH_MSK GENMASK(10, 9)
+#define LTC2688_CH_MODE_MSK BIT(11)
+
+#define LTC2688_DITHER_RAW_MASK GENMASK(15, 2)
+#define LTC2688_CH_CALIBBIAS_MASK GENMASK(15, 2)
+#define LTC2688_DITHER_RAW_MAX_VAL (BIT(14) - 1)
+#define LTC2688_CH_CALIBBIAS_MAX_VAL (BIT(14) - 1)
+
+/* Configuration register */
+#define LTC2688_CONFIG_RST BIT(15)
+#define LTC2688_CONFIG_EXT_REF BIT(1)
+
+#define LTC2688_DITHER_FREQ_AVAIL_N 5
+
+enum {
+ LTC2688_SPAN_RANGE_0V_5V,
+ LTC2688_SPAN_RANGE_0V_10V,
+ LTC2688_SPAN_RANGE_M5V_5V,
+ LTC2688_SPAN_RANGE_M10V_10V,
+ LTC2688_SPAN_RANGE_M15V_15V,
+ LTC2688_SPAN_RANGE_MAX
+};
+
+enum {
+ LTC2688_MODE_DEFAULT,
+ LTC2688_MODE_DITHER_TOGGLE,
+};
+
+struct ltc2688_chan {
+ long dither_frequency[LTC2688_DITHER_FREQ_AVAIL_N];
+ bool overrange;
+ bool toggle_chan;
+ u8 mode;
+};
+
+struct ltc2688_state {
+ struct spi_device *spi;
+ struct regmap *regmap;
+ struct regulator_bulk_data regulators[2];
+ struct ltc2688_chan channels[LTC2688_DAC_CHANNELS];
+ struct iio_chan_spec *iio_chan;
+ /* lock to protect against multiple access to the device and shared data */
+ struct mutex lock;
+ int vref;
+ /*
+ * DMA (thus cache coherency maintenance) requires the
+ * transfer buffers to live in their own cache lines.
+ */
+ u8 tx_data[6] ____cacheline_aligned;
+ u8 rx_data[3];
+};
+
+static int ltc2688_spi_read(void *context, const void *reg, size_t reg_size,
+ void *val, size_t val_size)
+{
+ struct ltc2688_state *st = context;
+ struct spi_transfer xfers[] = {
+ {
+ .tx_buf = st->tx_data,
+ .bits_per_word = 8,
+ .len = 3,
+ .cs_change = 1,
+ }, {
+ .tx_buf = st->tx_data + 3,
+ .rx_buf = st->rx_data,
+ .bits_per_word = 8,
+ .len = 3,
+ },
+ };
+ int ret;
+
+ memcpy(st->tx_data, reg, reg_size);
+
+ ret = spi_sync_transfer(st->spi, xfers, ARRAY_SIZE(xfers));
+ if (ret)
+ return ret;
+
+ memcpy(val, &st->rx_data[1], val_size);
+
+ return 0;
+}
+
+static int ltc2688_spi_write(void *context, const void *data, size_t count)
+{
+ struct ltc2688_state *st = context;
+
+ return spi_write(st->spi, data, count);
+}
+
+static int ltc2688_span_get(const struct ltc2688_state *st, int c)
+{
+ int ret, reg, span;
+
+ ret = regmap_read(st->regmap, LTC2688_CMD_CH_SETTING(c), ®);
+ if (ret)
+ return ret;
+
+ span = FIELD_GET(LTC2688_CH_SPAN_MSK, reg);
+ /* sanity check to make sure we don't get any weird value from the HW */
+ if (span >= LTC2688_SPAN_RANGE_MAX)
+ return -EIO;
+
+ return span;
+}
+
+static const int ltc2688_span_helper[LTC2688_SPAN_RANGE_MAX][2] = {
+ {0, 5000}, {0, 10000}, {-5000, 5000}, {-10000, 10000}, {-15000, 15000},
+};
+
+static int ltc2688_scale_get(const struct ltc2688_state *st, int c, int *val)
+{
+ const struct ltc2688_chan *chan = &st->channels[c];
+ int span, fs;
+
+ span = ltc2688_span_get(st, c);
+ if (span < 0)
+ return span;
+
+ fs = ltc2688_span_helper[span][1] - ltc2688_span_helper[span][0];
+ if (chan->overrange)
+ fs = mult_frac(fs, 105, 100);
+
+ *val = DIV_ROUND_CLOSEST(fs * st->vref, 4096);
+
+ return 0;
+}
+
+static int ltc2688_offset_get(const struct ltc2688_state *st, int c, int *val)
+{
+ int span;
+
+ span = ltc2688_span_get(st, c);
+ if (span < 0)
+ return span;
+
+ if (ltc2688_span_helper[span][0] < 0)
+ *val = -32768;
+ else
+ *val = 0;
+
+ return 0;
+}
+
+enum {
+ LTC2688_INPUT_A,
+ LTC2688_INPUT_B,
+ LTC2688_INPUT_B_AVAIL,
+ LTC2688_DITHER_OFF,
+ LTC2688_DITHER_FREQ_AVAIL,
+};
+
+static int ltc2688_dac_code_write(struct ltc2688_state *st, u32 chan, u32 input,
+ u16 code)
+{
+ struct ltc2688_chan *c = &st->channels[chan];
+ int ret, reg;
+
+ /* 2 LSBs set to 0 if writing dither amplitude */
+ if (!c->toggle_chan && input == LTC2688_INPUT_B) {
+ if (code > LTC2688_DITHER_RAW_MAX_VAL)
+ return -EINVAL;
+
+ code = FIELD_PREP(LTC2688_DITHER_RAW_MASK, code);
+ }
+
+ mutex_lock(&st->lock);
+ /* select the correct input register to read from */
+ ret = regmap_update_bits(st->regmap, LTC2688_CMD_A_B_SELECT, BIT(chan),
+ input << chan);
+ if (ret)
+ goto unlock;
+
+ /*
+ * If in dither/toggle mode the dac should be updated by an
+ * external signal (or sw toggle) and not here.
+ */
+ if (c->mode == LTC2688_MODE_DEFAULT)
+ reg = LTC2688_CMD_CH_CODE_UPDATE(chan);
+ else
+ reg = LTC2688_CMD_CH_CODE(chan);
+
+ ret = regmap_write(st->regmap, reg, code);
+unlock:
+ mutex_unlock(&st->lock);
+ return ret;
+}
+
+static int ltc2688_dac_code_read(struct ltc2688_state *st, u32 chan, u32 input,
+ u32 *code)
+{
+ struct ltc2688_chan *c = &st->channels[chan];
+ int ret;
+
+ mutex_lock(&st->lock);
+ ret = regmap_update_bits(st->regmap, LTC2688_CMD_A_B_SELECT, BIT(chan),
+ input << chan);
+ if (ret)
+ goto unlock;
+
+ ret = regmap_read(st->regmap, LTC2688_CMD_CH_CODE(chan), code);
+unlock:
+ mutex_unlock(&st->lock);
+
+ if (!c->toggle_chan && input == LTC2688_INPUT_B)
+ *code = FIELD_GET(LTC2688_DITHER_RAW_MASK, *code);
+
+ return ret;
+}
+
+static const int ltc2688_raw_range[] = {0, 1, U16_MAX};
+
+static int ltc2688_read_avail(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ const int **vals, int *type, int *length,
+ long info)
+{
+ switch (info) {
+ case IIO_CHAN_INFO_RAW:
+ *vals = ltc2688_raw_range;
+ *type = IIO_VAL_INT;
+ return IIO_AVAIL_RANGE;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int ltc2688_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long info)
+{
+ struct ltc2688_state *st = iio_priv(indio_dev);
+ int ret;
+
+ switch (info) {
+ case IIO_CHAN_INFO_RAW:
+ ret = ltc2688_dac_code_read(st, chan->channel, LTC2688_INPUT_A,
+ val);
+ if (ret)
+ return ret;
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_OFFSET:
+ ret = ltc2688_offset_get(st, chan->channel, val);
+ if (ret)
+ return ret;
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ ret = ltc2688_scale_get(st, chan->channel, val);
+ if (ret)
+ return ret;
+
+ *val = 16;
+ return IIO_VAL_FRACTIONAL_LOG2;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ ret = regmap_read(st->regmap,
+ LTC2688_CMD_CH_OFFSET(chan->channel), val);
+ if (ret)
+ return ret;
+
+ *val = FIELD_GET(LTC2688_CH_CALIBBIAS_MASK, *val);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ ret = regmap_read(st->regmap,
+ LTC2688_CMD_CH_GAIN(chan->channel), val);
+ if (ret)
+ return ret;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int ltc2688_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val,
+ int val2, long info)
+{
+ struct ltc2688_state *st = iio_priv(indio_dev);
+
+ switch (info) {
+ case IIO_CHAN_INFO_RAW:
+ if (val > U16_MAX || val < 0)
+ return -EINVAL;
+
+ return ltc2688_dac_code_write(st, chan->channel,
+ LTC2688_INPUT_A, val);
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (val > LTC2688_CH_CALIBBIAS_MAX_VAL)
+ return -EINVAL;
+
+ return regmap_write(st->regmap,
+ LTC2688_CMD_CH_OFFSET(chan->channel),
+ FIELD_PREP(LTC2688_CH_CALIBBIAS_MASK, val));
+ case IIO_CHAN_INFO_CALIBSCALE:
+ return regmap_write(st->regmap,
+ LTC2688_CMD_CH_GAIN(chan->channel), val);
+ default:
+ return -EINVAL;
+ }
+}
+
+static ssize_t ltc2688_dither_toggle_set(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ const char *buf, size_t len)
+{
+ struct ltc2688_state *st = iio_priv(indio_dev);
+ struct ltc2688_chan *c = &st->channels[chan->channel];
+ int ret;
+ bool en;
+
+ ret = kstrtobool(buf, &en);
+ if (ret)
+ return ret;
+
+ mutex_lock(&st->lock);
+ ret = regmap_update_bits(st->regmap, LTC2688_CMD_TOGGLE_DITHER_EN,
+ BIT(chan->channel), en << chan->channel);
+ if (ret)
+ goto unlock;
+
+ c->mode = en ? LTC2688_MODE_DITHER_TOGGLE : LTC2688_MODE_DEFAULT;
+unlock:
+ mutex_unlock(&st->lock);
+
+ return ret ?: len;
+}
+
+static ssize_t ltc2688_reg_bool_get(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ char *buf)
+{
+ const struct ltc2688_state *st = iio_priv(indio_dev);
+ int ret;
+ u32 val;
+
+ ret = regmap_read(st->regmap, private, &val);
+ if (ret)
+ return ret;
+
+ return sysfs_emit(buf, "%u\n", !!(val & BIT(chan->channel)));
+}
+
+static ssize_t ltc2688_reg_bool_set(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ const char *buf, size_t len)
+{
+ const struct ltc2688_state *st = iio_priv(indio_dev);
+ int ret;
+ bool en;
+
+ ret = kstrtobool(buf, &en);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->regmap, private, BIT(chan->channel),
+ en << chan->channel);
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+static ssize_t ltc2688_dither_freq_avail(const struct ltc2688_state *st,
+ const struct ltc2688_chan *chan,
+ char *buf)
+{
+ int sz = 0;
+ u32 f;
+
+ for (f = 0; f < ARRAY_SIZE(chan->dither_frequency); f++)
+ sz += sysfs_emit_at(buf, sz, "%ld ", chan->dither_frequency[f]);
+
+ buf[sz - 1] = '\n';
+
+ return sz;
+}
+
+static ssize_t ltc2688_dither_freq_get(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ char *buf)
+{
+ const struct ltc2688_state *st = iio_priv(indio_dev);
+ const struct ltc2688_chan *c = &st->channels[chan->channel];
+ u32 reg, freq;
+ int ret;
+
+ if (private == LTC2688_DITHER_FREQ_AVAIL)
+ return ltc2688_dither_freq_avail(st, c, buf);
+
+ ret = regmap_read(st->regmap, LTC2688_CMD_CH_SETTING(chan->channel),
+ ®);
+ if (ret)
+ return ret;
+
+ freq = FIELD_GET(LTC2688_CH_DIT_PER_MSK, reg);
+ if (freq >= ARRAY_SIZE(c->dither_frequency))
+ return -EIO;
+
+ return sysfs_emit(buf, "%ld\n", c->dither_frequency[freq]);
+}
+
+static ssize_t ltc2688_dither_freq_set(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ const char *buf, size_t len)
+{
+ const struct ltc2688_state *st = iio_priv(indio_dev);
+ const struct ltc2688_chan *c = &st->channels[chan->channel];
+ long val;
+ u32 freq;
+ int ret;
+
+ if (private == LTC2688_DITHER_FREQ_AVAIL)
+ return -EINVAL;
+
+ ret = kstrtol(buf, 10, &val);
+ if (ret)
+ return ret;
+
+ for (freq = 0; freq < ARRAY_SIZE(c->dither_frequency); freq++) {
+ if (val == c->dither_frequency[freq])
+ break;
+ }
+
+ if (freq == ARRAY_SIZE(c->dither_frequency))
+ return -EINVAL;
+
+ ret = regmap_update_bits(st->regmap,
+ LTC2688_CMD_CH_SETTING(chan->channel),
+ LTC2688_CH_DIT_PER_MSK,
+ FIELD_PREP(LTC2688_CH_DIT_PER_MSK, freq));
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+static ssize_t ltc2688_dac_input_read(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ char *buf)
+{
+ struct ltc2688_state *st = iio_priv(indio_dev);
+ int ret;
+ u32 val;
+
+ if (private == LTC2688_INPUT_B_AVAIL)
+ return sysfs_emit(buf, "[%u %u %u]\n", ltc2688_raw_range[0],
+ ltc2688_raw_range[1],
+ ltc2688_raw_range[2] / 4);
+
+ if (private == LTC2688_DITHER_OFF)
+ return sysfs_emit(buf, "0\n");
+
+ ret = ltc2688_dac_code_read(st, chan->channel, private, &val);
+ if (ret)
+ return ret;
+
+ return sysfs_emit(buf, "%u\n", val);
+}
+
+static ssize_t ltc2688_dac_input_write(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ const char *buf, size_t len)
+{
+ struct ltc2688_state *st = iio_priv(indio_dev);
+ int ret;
+ u16 val;
+
+ if (private == LTC2688_INPUT_B_AVAIL || private == LTC2688_DITHER_OFF)
+ return -EINVAL;
+
+ ret = kstrtou16(buf, 10, &val);
+ if (ret)
+ return ret;
+
+ ret = ltc2688_dac_code_write(st, chan->channel, private, val);
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+static int ltc2688_get_dither_phase(struct iio_dev *dev,
+ const struct iio_chan_spec *chan)
+{
+ struct ltc2688_state *st = iio_priv(dev);
+ int ret, regval;
+
+ ret = regmap_read(st->regmap, LTC2688_CMD_CH_SETTING(chan->channel),
+ ®val);
+ if (ret)
+ return ret;
+
+ return FIELD_GET(LTC2688_CH_DIT_PH_MSK, regval);
+}
+
+static int ltc2688_set_dither_phase(struct iio_dev *dev,
+ const struct iio_chan_spec *chan,
+ unsigned int phase)
+{
+ struct ltc2688_state *st = iio_priv(dev);
+
+ return regmap_update_bits(st->regmap,
+ LTC2688_CMD_CH_SETTING(chan->channel),
+ LTC2688_CH_DIT_PH_MSK,
+ FIELD_PREP(LTC2688_CH_DIT_PH_MSK, phase));
+}
+
+static int ltc2688_reg_access(struct iio_dev *indio_dev,
+ unsigned int reg,
+ unsigned int writeval,
+ unsigned int *readval)
+{
+ struct ltc2688_state *st = iio_priv(indio_dev);
+
+ if (readval)
+ return regmap_read(st->regmap, reg, readval);
+
+ return regmap_write(st->regmap, reg, writeval);
+}
+
+static const char * const ltc2688_dither_phase[] = {
+ "0", "1.5708", "3.14159", "4.71239",
+};
+
+static const struct iio_enum ltc2688_dither_phase_enum = {
+ .items = ltc2688_dither_phase,
+ .num_items = ARRAY_SIZE(ltc2688_dither_phase),
+ .set = ltc2688_set_dither_phase,
+ .get = ltc2688_get_dither_phase,
+};
+
+#define LTC2688_CHAN_EXT_INFO(_name, _what, _shared, _read, _write) { \
+ .name = _name, \
+ .read = (_read), \
+ .write = (_write), \
+ .private = (_what), \
+ .shared = (_shared), \
+}
+
+/*
+ * For toggle mode we only expose the symbol attr (sw_toggle) in case a TGPx is
+ * not provided in dts.
+ */
+static const struct iio_chan_spec_ext_info ltc2688_toggle_sym_ext_info[] = {
+ LTC2688_CHAN_EXT_INFO("raw0", LTC2688_INPUT_A, IIO_SEPARATE,
+ ltc2688_dac_input_read, ltc2688_dac_input_write),
+ LTC2688_CHAN_EXT_INFO("raw1", LTC2688_INPUT_B, IIO_SEPARATE,
+ ltc2688_dac_input_read, ltc2688_dac_input_write),
+ LTC2688_CHAN_EXT_INFO("toggle_en", LTC2688_CMD_TOGGLE_DITHER_EN,
+ IIO_SEPARATE, ltc2688_reg_bool_get,
+ ltc2688_dither_toggle_set),
+ LTC2688_CHAN_EXT_INFO("powerdown", LTC2688_CMD_POWERDOWN, IIO_SEPARATE,
+ ltc2688_reg_bool_get, ltc2688_reg_bool_set),
+ LTC2688_CHAN_EXT_INFO("symbol", LTC2688_CMD_SW_TOGGLE, IIO_SEPARATE,
+ ltc2688_reg_bool_get, ltc2688_reg_bool_set),
+ {}
+};
+
+static const struct iio_chan_spec_ext_info ltc2688_toggle_ext_info[] = {
+ LTC2688_CHAN_EXT_INFO("raw0", LTC2688_INPUT_A, IIO_SEPARATE,
+ ltc2688_dac_input_read, ltc2688_dac_input_write),
+ LTC2688_CHAN_EXT_INFO("raw1", LTC2688_INPUT_B, IIO_SEPARATE,
+ ltc2688_dac_input_read, ltc2688_dac_input_write),
+ LTC2688_CHAN_EXT_INFO("toggle_en", LTC2688_CMD_TOGGLE_DITHER_EN,
+ IIO_SEPARATE, ltc2688_reg_bool_get,
+ ltc2688_dither_toggle_set),
+ LTC2688_CHAN_EXT_INFO("powerdown", LTC2688_CMD_POWERDOWN, IIO_SEPARATE,
+ ltc2688_reg_bool_get, ltc2688_reg_bool_set),
+ {}
+};
+
+static struct iio_chan_spec_ext_info ltc2688_dither_ext_info[] = {
+ LTC2688_CHAN_EXT_INFO("dither_raw", LTC2688_INPUT_B, IIO_SEPARATE,
+ ltc2688_dac_input_read, ltc2688_dac_input_write),
+ LTC2688_CHAN_EXT_INFO("dither_raw_available", LTC2688_INPUT_B_AVAIL,
+ IIO_SEPARATE, ltc2688_dac_input_read,
+ ltc2688_dac_input_write),
+ LTC2688_CHAN_EXT_INFO("dither_offset", LTC2688_DITHER_OFF, IIO_SEPARATE,
+ ltc2688_dac_input_read, ltc2688_dac_input_write),
+ /*
+ * Not IIO_ENUM because the available freq needs to be computed at
+ * probe. We could still use it, but it didn't felt much right.
+ */
+ LTC2688_CHAN_EXT_INFO("dither_frequency", 0, IIO_SEPARATE,
+ ltc2688_dither_freq_get, ltc2688_dither_freq_set),
+ LTC2688_CHAN_EXT_INFO("dither_frequency_available",
+ LTC2688_DITHER_FREQ_AVAIL, IIO_SEPARATE,
+ ltc2688_dither_freq_get, ltc2688_dither_freq_set),
+ IIO_ENUM("dither_phase", IIO_SEPARATE, <c2688_dither_phase_enum),
+ IIO_ENUM_AVAILABLE("dither_phase", IIO_SEPARATE,
+ <c2688_dither_phase_enum),
+ LTC2688_CHAN_EXT_INFO("dither_en", LTC2688_CMD_TOGGLE_DITHER_EN,
+ IIO_SEPARATE, ltc2688_reg_bool_get,
+ ltc2688_dither_toggle_set),
+ LTC2688_CHAN_EXT_INFO("powerdown", LTC2688_CMD_POWERDOWN, IIO_SEPARATE,
+ ltc2688_reg_bool_get, ltc2688_reg_bool_set),
+ {}
+};
+
+static const struct iio_chan_spec_ext_info ltc2688_ext_info[] = {
+ LTC2688_CHAN_EXT_INFO("powerdown", LTC2688_CMD_POWERDOWN, IIO_SEPARATE,
+ ltc2688_reg_bool_get, ltc2688_reg_bool_set),
+ {}
+};
+
+#define LTC2688_CHANNEL(_chan) { \
+ .type = IIO_VOLTAGE, \
+ .indexed = 1, \
+ .output = 1, \
+ .channel = (_chan), \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_CALIBSCALE) | \
+ BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW), \
+ .ext_info = ltc2688_ext_info \
+}
+
+static const struct iio_chan_spec ltc2688_channels[] = {
+ LTC2688_CHANNEL(0),
+ LTC2688_CHANNEL(1),
+ LTC2688_CHANNEL(2),
+ LTC2688_CHANNEL(3),
+ LTC2688_CHANNEL(4),
+ LTC2688_CHANNEL(5),
+ LTC2688_CHANNEL(6),
+ LTC2688_CHANNEL(7),
+ LTC2688_CHANNEL(8),
+ LTC2688_CHANNEL(9),
+ LTC2688_CHANNEL(10),
+ LTC2688_CHANNEL(11),
+ LTC2688_CHANNEL(12),
+ LTC2688_CHANNEL(13),
+ LTC2688_CHANNEL(14),
+ LTC2688_CHANNEL(15),
+};
+
+static void ltc2688_clk_disable(void *clk)
+{
+ clk_disable_unprepare(clk);
+}
+
+static const int ltc2688_period[LTC2688_DITHER_FREQ_AVAIL_N] = {
+ 4, 8, 16, 32, 64,
+};
+
+static int ltc2688_tgp_clk_setup(struct ltc2688_state *st,
+ struct ltc2688_chan *chan,
+ struct device_node *np, int tgp)
+{
+ unsigned long rate;
+ struct clk *clk;
+ int ret, f;
+
+ clk = devm_get_clk_from_child(&st->spi->dev, np, NULL);
+ if (IS_ERR(clk))
+ return dev_err_probe(&st->spi->dev, PTR_ERR(clk),
+ "failed to get tgp clk.\n");
+
+ ret = clk_prepare_enable(clk);
+ if (ret)
+ return dev_err_probe(&st->spi->dev, ret,
+ "failed to enable tgp clk.\n");
+
+ ret = devm_add_action_or_reset(&st->spi->dev, ltc2688_clk_disable, clk);
+ if (ret)
+ return ret;
+
+ if (chan->toggle_chan)
+ return 0;
+
+ /* calculate available dither frequencies */
+ rate = clk_get_rate(clk);
+ for (f = 0; f < ARRAY_SIZE(chan->dither_frequency); f++)
+ chan->dither_frequency[f] = DIV_ROUND_CLOSEST(rate, ltc2688_period[f]);
+
+ return 0;
+}
+
+static int ltc2688_span_lookup(const struct ltc2688_state *st, int min, int max)
+{
+ u32 span;
+
+ for (span = 0; span < ARRAY_SIZE(ltc2688_span_helper); span++) {
+ if (min == ltc2688_span_helper[span][0] &&
+ max == ltc2688_span_helper[span][1])
+ return span;
+ }
+
+ return -EINVAL;
+}
+
+static int ltc2688_channel_config(struct ltc2688_state *st)
+{
+ struct device *dev = &st->spi->dev;
+ struct device_node *child;
+ u32 reg, clk_input, val, tmp[2];
+ int ret, span;
+
+ for_each_available_child_of_node(dev->of_node, child) {
+ struct ltc2688_chan *chan;
+
+ ret = of_property_read_u32(child, "reg", ®);
+ if (ret) {
+ of_node_put(child);
+ return dev_err_probe(dev, ret,
+ "Failed to get reg property\n");
+ }
+
+ if (reg >= LTC2688_DAC_CHANNELS) {
+ of_node_put(child);
+ return dev_err_probe(dev, -EINVAL,
+ "reg bigger than: %d\n",
+ LTC2688_DAC_CHANNELS);
+ }
+
+ val = 0;
+ chan = &st->channels[reg];
+ if (of_property_read_bool(child, "adi,toggle-mode")) {
+ chan->toggle_chan = true;
+ /* assume sw toggle ABI */
+ st->iio_chan[reg].ext_info = ltc2688_toggle_sym_ext_info;
+ /*
+ * Clear IIO_CHAN_INFO_RAW bit as toggle channels expose
+ * out_voltage_raw{0|1} files.
+ */
+ clear_bit(IIO_CHAN_INFO_RAW,
+ &st->iio_chan[reg].info_mask_separate);
+ }
+
+ ret = of_property_read_u32_array(child, "adi,output-range-microvolt",
+ tmp, ARRAY_SIZE(tmp));
+ if (!ret) {
+ span = ltc2688_span_lookup(st, (int)tmp[0] / 1000,
+ tmp[1] / 1000);
+ if (span < 0) {
+ of_node_put(child);
+ return dev_err_probe(dev, -EINVAL,
+ "output range not valid:[%d %d]\n",
+ tmp[0], tmp[1]);
+ }
+
+ val |= FIELD_PREP(LTC2688_CH_SPAN_MSK, span);
+ }
+
+ ret = of_property_read_u32(child, "adi,toggle-dither-input",
+ &clk_input);
+ if (!ret) {
+ if (clk_input >= LTC2688_CH_TGP_MAX) {
+ of_node_put(child);
+ return dev_err_probe(dev, -EINVAL,
+ "toggle-dither-input inv value(%d)\n",
+ clk_input);
+ }
+
+ ret = ltc2688_tgp_clk_setup(st, chan, child, clk_input);
+ if (ret) {
+ of_node_put(child);
+ return ret;
+ }
+
+ /*
+ * 0 means software toggle which is the default mode.
+ * Hence the +1.
+ */
+ val |= FIELD_PREP(LTC2688_CH_TD_SEL_MSK, clk_input + 1);
+
+ /*
+ * If a TGPx is given, we automatically assume a dither
+ * capable channel (unless toggle is already enabled).
+ * On top of this we just set here the dither bit in the
+ * channel settings. It won't have any effect until the
+ * global toggle/dither bit is enabled.
+ */
+ if (!chan->toggle_chan) {
+ val |= FIELD_PREP(LTC2688_CH_MODE_MSK, 1);
+ st->iio_chan[reg].ext_info = ltc2688_dither_ext_info;
+ } else {
+ /* wait, no sw toggle after all */
+ st->iio_chan[reg].ext_info = ltc2688_toggle_ext_info;
+ }
+ }
+
+ if (of_property_read_bool(child, "adi,overrange")) {
+ chan->overrange = true;
+ val |= LTC2688_CH_OVERRANGE_MSK;
+ }
+
+ if (!val)
+ continue;
+
+ ret = regmap_write(st->regmap, LTC2688_CMD_CH_SETTING(reg),
+ val);
+ if (ret) {
+ of_node_put(child);
+ return dev_err_probe(dev, -EINVAL,
+ "failed to set chan settings\n");
+ }
+ }
+
+ return 0;
+}
+
+static int ltc2688_setup(struct ltc2688_state *st, struct regulator *vref)
+{
+ struct gpio_desc *gpio;
+ int ret;
+
+ /*
+ * If we have a reset pin, use that to reset the board, If not, use
+ * the reset bit.
+ */
+ gpio = devm_gpiod_get_optional(&st->spi->dev, "clr", GPIOD_OUT_HIGH);
+ if (IS_ERR(gpio))
+ return dev_err_probe(&st->spi->dev, PTR_ERR(gpio),
+ "Failed to get reset gpio");
+ if (gpio) {
+ usleep_range(1000, 1200);
+ /* bring device out of reset */
+ gpiod_set_value_cansleep(gpio, 0);
+ } else {
+ ret = regmap_update_bits(st->regmap, LTC2688_CMD_CONFIG,
+ LTC2688_CONFIG_RST,
+ LTC2688_CONFIG_RST);
+ if (ret)
+ return ret;
+ }
+
+ usleep_range(10000, 12000);
+
+ /*
+ * Duplicate the default channel configuration as it can change during
+ * @ltc2688_channel_config()
+ */
+ st->iio_chan = devm_kmemdup(&st->spi->dev, ltc2688_channels,
+ sizeof(ltc2688_channels), GFP_KERNEL);
+ if (!st->iio_chan)
+ return -ENOMEM;
+
+ ret = ltc2688_channel_config(st);
+ if (ret)
+ return ret;
+
+ if (!vref)
+ return 0;
+
+ return regmap_set_bits(st->regmap, LTC2688_CMD_CONFIG,
+ LTC2688_CONFIG_EXT_REF);
+}
+
+static void ltc2688_disable_regulators(void *data)
+{
+ struct ltc2688_state *st = data;
+
+ regulator_bulk_disable(ARRAY_SIZE(st->regulators), st->regulators);
+}
+
+static void ltc2688_disable_regulator(void *regulator)
+{
+ regulator_disable(regulator);
+}
+
+static bool ltc2688_reg_readable(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case LTC2688_CMD_CH_CODE(0) ... LTC2688_CMD_CH_GAIN(15):
+ return true;
+ case LTC2688_CMD_CONFIG ... LTC2688_CMD_THERMAL_STAT:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool ltc2688_reg_writable(struct device *dev, unsigned int reg)
+{
+ /*
+ * There's a jump from 0x76 to 0x78 in the write codes and the thermal
+ * status code is 0x77 (which is read only) so that we need to check
+ * that special condition.
+ */
+ if (reg <= LTC2688_CMD_UPDATE_ALL && reg != LTC2688_CMD_THERMAL_STAT)
+ return true;
+
+ return false;
+}
+
+struct regmap_bus ltc2688_regmap_bus = {
+ .read = ltc2688_spi_read,
+ .write = ltc2688_spi_write,
+ .read_flag_mask = LTC2688_READ_OPERATION,
+ .reg_format_endian_default = REGMAP_ENDIAN_BIG,
+ .val_format_endian_default = REGMAP_ENDIAN_BIG
+};
+
+static const struct regmap_config ltc2688_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 16,
+ .readable_reg = ltc2688_reg_readable,
+ .writeable_reg = ltc2688_reg_writable,
+ /* ignoring the no op command */
+ .max_register = LTC2688_CMD_UPDATE_ALL
+};
+
+static const struct iio_info ltc2688_info = {
+ .write_raw = ltc2688_write_raw,
+ .read_raw = ltc2688_read_raw,
+ .read_avail = ltc2688_read_avail,
+ .debugfs_reg_access = ltc2688_reg_access,
+};
+
+static int ltc2688_probe(struct spi_device *spi)
+{
+ struct ltc2688_state *st;
+ struct iio_dev *indio_dev;
+ struct regulator *vref_reg;
+ struct device *dev = &spi->dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ st = iio_priv(indio_dev);
+ st->spi = spi;
+
+ /* Just write this once. No need to do it in every regmap read. */
+ st->tx_data[3] = LTC2688_CMD_NOOP;
+ mutex_init(&st->lock);
+
+ st->regmap = devm_regmap_init(dev, <c2688_regmap_bus, st,
+ <c2688_regmap_config);
+ if (IS_ERR(st->regmap))
+ return dev_err_probe(dev, PTR_ERR(st->regmap),
+ "Failed to init regmap");
+
+ st->regulators[0].supply = "vcc";
+ st->regulators[1].supply = "iovcc";
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(st->regulators),
+ st->regulators);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to get regulators\n");
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(st->regulators), st->regulators);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to enable regulators\n");
+
+ ret = devm_add_action_or_reset(dev, ltc2688_disable_regulators, st);
+ if (ret)
+ return ret;
+
+ vref_reg = devm_regulator_get_optional(dev, "vref");
+ if (!IS_ERR(vref_reg)) {
+ ret = regulator_enable(vref_reg);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "Failed to enable vref regulators\n");
+
+ ret = devm_add_action_or_reset(dev, ltc2688_disable_regulator,
+ vref_reg);
+ if (ret)
+ return ret;
+
+ ret = regulator_get_voltage(vref_reg);
+ if (ret < 0)
+ return dev_err_probe(dev, ret, "Failed to get vref\n");
+
+ st->vref = ret / 1000;
+ } else {
+ if (PTR_ERR(vref_reg) != -ENODEV)
+ return dev_err_probe(dev, PTR_ERR(vref_reg),
+ "Failed to get vref regulator");
+
+ vref_reg = NULL;
+ /* internal reference */
+ st->vref = 4096;
+ }
+
+ ret = ltc2688_setup(st, vref_reg);
+ if (ret)
+ return ret;
+
+ indio_dev->name = "ltc2688";
+ indio_dev->info = <c2688_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = st->iio_chan;
+ indio_dev->num_channels = ARRAY_SIZE(ltc2688_channels);
+
+ return devm_iio_device_register(dev, indio_dev);
+}
+
+static const struct of_device_id ltc2688_of_id[] = {
+ { .compatible = "adi,ltc2688" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, ltc2688_of_id);
+
+static const struct spi_device_id ltc2688_id[] = {
+ { "ltc2688" },
+ {}
+};
+MODULE_DEVICE_TABLE(spi, ltc2688_id);
+
+static struct spi_driver ltc2688_driver = {
+ .driver = {
+ .name = "ltc2688",
+ .of_match_table = ltc2688_of_id,
+ },
+ .probe = ltc2688_probe,
+ .id_table = ltc2688_id,
+};
+module_spi_driver(ltc2688_driver);
+
+MODULE_AUTHOR("Nuno Sá <nuno.sa@analog.com>");
+MODULE_DESCRIPTION("Analog Devices LTC2688 DAC");
+MODULE_LICENSE("GPL");
--
2.34.1
^ permalink raw reply related
* [PATCH v3 2/3] iio: ABI: add ABI file for the LTC2688 DAC
From: Nuno Sá @ 2022-01-21 14:25 UTC (permalink / raw)
To: linux-iio, devicetree
Cc: Rob Herring, Jonathan Cameron, Lars-Peter Clausen,
Michael Hennerich
In-Reply-To: <20220121142501.151-1-nuno.sa@analog.com>
Define the sysfs interface for toggle or dither capable channels. Dither
capable channels will have the extended interface:
* out_voltageY_dither_en
* out_voltageY_dither_raw
* out_voltageY_dither_offset
* out_voltageY_dither_raw_available
* out_voltageY_dither_frequency
* out_voltageY_dither_frequency_available
* out_voltageY_dither_phase
* out_voltageY_dither_phase_available
Toggle enabled channels will have:
* out_voltageY_toggle_en
* out_voltageY_raw0
* out_voltageY_raw1
* out_voltageY_symbol
The common interface present in all channels is:
* out_voltageY_raw (not present in toggle enabled channels)
* out_voltageY_raw_available
* out_voltageY_powerdown
* out_voltageY_scale
* out_voltageY_offset
* out_voltageY_calibbias
* out_voltageY_calibscale
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
---
.../ABI/testing/sysfs-bus-iio-dac-ltc2688 | 86 +++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 87 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688 b/Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688
new file mode 100644
index 000000000000..0ceded7e932b
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688
@@ -0,0 +1,86 @@
+What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_en
+KernelVersion: 5.17
+Contact: linux-iio@vger.kernel.org
+Description:
+ Dither enable. Write 1 to enable dither or 0 to disable it. This is useful
+ for changing the dither parameters. They way it should be done is:
+
+ - disable dither operation;
+ - change dither parameters (eg: frequency, phase...);
+ - enabled dither operation
+
+What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_raw
+KernelVersion: 5.17
+Contact: linux-iio@vger.kernel.org
+Description:
+ This raw, unscaled value refers to the dither signal amplitude.
+ The same scale as in out_voltageY_raw applies. However, the
+ offset might be different as it's always 0 for this attribute.
+
+What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_raw_available
+KernelVersion: 5.17
+Contact: linux-iio@vger.kernel.org
+Description:
+ Available range for dither raw amplitude values.
+
+What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_offset
+KernelVersion: 5.17
+Contact: linux-iio@vger.kernel.org
+Description:
+ Offset applied to out_voltageY_dither_raw. Read only attribute
+ always set to 0.
+
+What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_frequency
+KernelVersion: 5.17
+Contact: linux-iio@vger.kernel.org
+Description:
+ Sets the dither signal frequency. Units are in Hz.
+
+What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_frequency_available
+KernelVersion: 5.17
+Contact: linux-iio@vger.kernel.org
+Description:
+ Returns the available values for the dither frequency.
+
+What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_phase
+KernelVersion: 5.17
+Contact: linux-iio@vger.kernel.org
+Description:
+ Sets the dither signal phase. Units are in Radians.
+
+What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_phase_available
+KernelVersion: 5.17
+Contact: linux-iio@vger.kernel.org
+Description:
+ Returns the available values for the dither phase.
+
+What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_toggle_en
+KernelVersion: 5.17
+Contact: linux-iio@vger.kernel.org
+Description:
+ Toggle enable. Write 1 to enable toggle or 0 to disable it. This is
+ useful when one wants to change the DAC output codes. The way it should
+ be done is:
+
+ - disable toggle operation;
+ - change out_voltageY_raw0 and out_voltageY_raw1;
+ - enable toggle operation.
+
+What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw0
+What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw1
+KernelVersion: 5.17
+Contact: linux-iio@vger.kernel.org
+Description:
+ It has the same meaning as out_voltageY_raw. This attribute is
+ specific to toggle enabled channels and refers to the DAC output
+ code in INPUT_A (_raw0) and INPUT_B (_raw1). The same scale and offset
+ as in out_voltageY_raw applies.
+
+What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_symbol
+KernelVersion: 5.17
+Contact: linux-iio@vger.kernel.org
+Description:
+ Performs a SW toggle. This attribute is specific to toggle
+ enabled channels and allows to toggle between out_voltageY_raw0
+ and out_voltageY_raw1 through software. Writing 0 will select
+ out_voltageY_raw0 while 1 selects out_voltageY_raw1.
diff --git a/MAINTAINERS b/MAINTAINERS
index 419b181f4749..1ce4bb5e460a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11195,6 +11195,7 @@ M: Nuno Sá <nuno.sa@analog.com>
L: linux-iio@vger.kernel.org
S: Supported
W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688
F: drivers/iio/dac/ltc2688.c
LTC2947 HARDWARE MONITOR DRIVER
--
2.34.1
^ permalink raw reply related
* [PATCH v3 3/3] dt-bindings: iio: Add ltc2688 documentation
From: Nuno Sá @ 2022-01-21 14:25 UTC (permalink / raw)
To: linux-iio, devicetree
Cc: Rob Herring, Jonathan Cameron, Lars-Peter Clausen,
Michael Hennerich
In-Reply-To: <20220121142501.151-1-nuno.sa@analog.com>
Document the LTC2688 devicetree properties.
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
---
.../bindings/iio/dac/adi,ltc2688.yaml | 146 ++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 147 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml
diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml
new file mode 100644
index 000000000000..48f9e7d29423
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml
@@ -0,0 +1,146 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dac/adi,ltc2688.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices LTC2688 DAC
+
+maintainers:
+ - Nuno Sá <nuno.sa@analog.com>
+
+description: |
+ Analog Devices LTC2688 16 channel, 16 bit, +-15V DAC
+ https://www.analog.com/media/en/technical-documentation/data-sheets/ltc2688.pdf
+
+properties:
+ compatible:
+ enum:
+ - adi,ltc2688
+
+ reg:
+ maxItems: 1
+
+ vcc-supply:
+ description: Analog Supply Voltage Input.
+
+ iovcc-supply:
+ description: Digital Input/Output Supply Voltage.
+
+ vref-supply:
+ description:
+ Reference Input/Output. The voltage at the REF pin sets the full-scale
+ range of all channels. If not provided the internal reference is used and
+ also provided on the VREF pin".
+
+ clr-gpios:
+ description:
+ If specified, it will be asserted during driver probe. As the line is
+ active low, it should be marked GPIO_ACTIVE_LOW.
+ maxItems: 1
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+patternProperties:
+ "^channel@([0-9]|1[0-5])$":
+ type: object
+
+ properties:
+ reg:
+ description: The channel number representing the DAC output channel.
+ maximum: 15
+
+ adi,toggle-mode:
+ description:
+ Set the channel as a toggle enabled channel. Toggle operation enables
+ fast switching of a DAC output between two different DAC codes without
+ any SPI transaction.
+ type: boolean
+
+ adi,output-range-microvolt:
+ description: Specify the channel output full scale range.
+ oneOf:
+ - items:
+ - const: 0
+ - enum: [5000000, 10000000]
+ - items:
+ - const: -5000000
+ - const: 5000000
+ - items:
+ - const: -10000000
+ - const: 10000000
+ - items:
+ - const: -15000000
+ - const: 15000000
+
+ adi,overrange:
+ description: Enable 5% overrange over the selected full scale range.
+ type: boolean
+
+ clocks:
+ maxItems: 1
+
+ adi,toggle-dither-input:
+ description:
+ Selects the TGPx pin to be associated with this channel. This setting
+ only makes sense for toggle or dither enabled channels. If
+ @adi,toggle-mode is not set and this property is given, the channel is
+ assumed to be a dither capable channel. Note that multiple channels
+ can be mapped to the same pin. If this setting is given, the
+ respective @clock must also be provided. Mappings between this and
+ input pins
+ 0 - TGP1
+ 1 - TGP2
+ 2 - TGP3
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1, 2]
+
+ dependencies:
+ adi,toggle-dither-input: [ clocks ]
+
+ required:
+ - reg
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ ltc2688: ltc2688@0 {
+ compatible = "adi,ltc2688";
+ reg = <0>;
+
+ vcc-supply = <&vcc>;
+ iovcc-supply = <&vcc>;
+ vref-supply = <&vref>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+ channel@0 {
+ reg = <0>;
+ adi,toggle-mode;
+ adi,overrange;
+ };
+
+ channel@1 {
+ reg = <1>;
+ adi,output-range-microvolt = <0 10000000>;
+
+ clocks = <&clock_tgp3>;
+ adi,toggle-dither-input = <2>;
+ };
+ };
+ };
+
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 1ce4bb5e460a..bc3f8dc8dca2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11196,6 +11196,7 @@ L: linux-iio@vger.kernel.org
S: Supported
W: http://ez.analog.com/community/linux-device-drivers
F: Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688
+F: Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml
F: drivers/iio/dac/ltc2688.c
LTC2947 HARDWARE MONITOR DRIVER
--
2.34.1
^ permalink raw reply related
* [PATCH v3 0/3] Add support for LTC2688
From: Nuno Sá @ 2022-01-21 14:24 UTC (permalink / raw)
To: linux-iio, devicetree
Cc: Rob Herring, Jonathan Cameron, Lars-Peter Clausen,
Michael Hennerich
The ABI defined for this driver has some subtleties that were previously
discussed in this RFC [1]. This might not be the final state but,
hopefully, we are close to it:
toggle mode channels:
* out_voltageY_toggle_en
* out_voltageY_raw0
* out_voltageY_raw1
* out_voltageY_symbol
dither mode channels:
* out_voltageY_dither_en
* out_voltageY_dither_raw
* out_voltageY_dither_raw_available
* out_voltageY_dither_offset
* out_voltageY_dither_frequency
* out_voltageY_dither_frequency_available
* out_voltageY_dither_phase
* out_voltageY_dither_phase_available
Default channels won't have any of the above ABIs. A channel is toggle
capable if the devicetree 'adi,toggle-mode' flag is set. For dither, the
assumption is more silent. If 'adi,toggle-mode' is not given and a
channel is associated with a TGPx pin through 'adi,toggle-dither-input',
then the channel is assumed to be dither capable (there's no point in
having a dither capable channel without an input clock).
changes in v2:
ltc2688:
* Use local buffer for regmap read. Do not assume that reg is part of
larger buffer;
* Renamed GPIO to "clr" so that is consistent with the datasheet;
* Renamed 'mask' and 'm' to info. 'mask' is a thing from the past;
* Removed 'LTC2688_CHAN_TOGGLE()' and defined to static ext_info arrays;
* Use 'regmap_set_bits' to set external ref;
* Use FIELD_{PREP|GET} for dither amplitude and channel calibbias where
only 13bits are used;
* Use 'regmap_write()' instead of update_bits for channels settings;
* Init 'val' at the beginning of the channel configuration loop
(and drop mask);
* Comment 'ltc2688_reg_writable()' to account for the special condition;
* Kmemdup default channels so that it can be safely changed per probed
device;
* Replace extended info multiplexer functions by individual functions;
* Use raw0 ABI for toggle channels;
* Use dedicated offset ABI for dither channels;
* Misc changes (spell fixes, blank lines...);
* Have a clock property per channel. Note that we this I moved to OF
since we now have to use 'devm_get_clk_from_child()' which is using
device_node. Note that I could use 'to_of_node()' but mixing of.h and
property.h does not feel like a good idea.
ABI:
* Added out_voltageY_raw0 ABI for toggle mode;
* Added out_voltageY_dither_offset.
Bindings:
* Use standard microvolt unit;
* Added constrains for adi,output-range-microvolt and removed negative
values from the dts example;
* Moved clocks to the channel object;
* Dropped clock-names;
* Add a dependency between 'adi,toggle-dither-input' and 'clocks'.
Changes in v3:
ltc2688:
* Fix mismatch between functions and function pointers detected by kernel
test bot;
* Always use if (ret) when ret > 0 has no meaning;
* Rename ltc2688_bulk_disable -> ltc2688_disable_regulators;
* Report dither phase in radians rather than degrees.
ABI:
* Specify units for dither_phase and dither_freqency;
* Say why its useful to have dither_en and toggle_en;
* Combine out_voltageY_raw0 and out_voltageY_raw1;
* Fix some description issues in out_voltageY_raw{0|1} and
out_voltageY_symbol.
Bindings:
* Remove mentions to ABI (linux specifix);
* Slightly rephrased VREF and adi,toggle-dither-input properties and
suggested.
[1]: https://marc.info/?l=linux-iio&m=163662843603265&w=2
Nuno Sá (3):
iio: dac: add support for ltc2688
iio: ABI: add ABI file for the LTC2688 DAC
dt-bindings: iio: Add ltc2688 documentation
.../ABI/testing/sysfs-bus-iio-dac-ltc2688 | 86 ++
.../bindings/iio/dac/adi,ltc2688.yaml | 146 +++
MAINTAINERS | 9 +
drivers/iio/dac/Kconfig | 11 +
drivers/iio/dac/Makefile | 1 +
drivers/iio/dac/ltc2688.c | 1070 +++++++++++++++++
6 files changed, 1323 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688
create mode 100644 Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml
create mode 100644 drivers/iio/dac/ltc2688.c
--
2.34.1
^ permalink raw reply
* Re: [PATCH] dt-bindings: hwmon: lm90: Drop Tegra specifics from example
From: Guenter Roeck @ 2022-01-21 14:08 UTC (permalink / raw)
To: Rob Herring; +Cc: Jean Delvare, linux-hwmon, devicetree, linux-kernel
In-Reply-To: <20220119015514.2441231-1-robh@kernel.org>
On Tue, Jan 18, 2022 at 07:55:13PM -0600, Rob Herring wrote:
> There's no need to complicate examples with a platform specific macro.
> It also complicates example parsing to figure out the number of
> interrupt cells in examples (based on bracketing).
>
> Signed-off-by: Rob Herring <robh@kernel.org>
Applied to hwmon-next.
Thanks,
Guenter
> ---
> Documentation/devicetree/bindings/hwmon/national,lm90.yaml | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/hwmon/national,lm90.yaml b/Documentation/devicetree/bindings/hwmon/national,lm90.yaml
> index 6e1d54ff5d5b..30db92977937 100644
> --- a/Documentation/devicetree/bindings/hwmon/national,lm90.yaml
> +++ b/Documentation/devicetree/bindings/hwmon/national,lm90.yaml
> @@ -60,7 +60,6 @@ additionalProperties: false
>
> examples:
> - |
> - #include <dt-bindings/gpio/tegra-gpio.h>
> #include <dt-bindings/interrupt-controller/irq.h>
>
> i2c {
> @@ -71,8 +70,7 @@ examples:
> compatible = "onnn,nct1008";
> reg = <0x4c>;
> vcc-supply = <&palmas_ldo6_reg>;
> - interrupt-parent = <&gpio>;
> - interrupts = <TEGRA_GPIO(O, 4) IRQ_TYPE_LEVEL_LOW>;
> + interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
> #thermal-sensor-cells = <1>;
> };
> };
^ permalink raw reply
* [PATCH v4 1/4] Input: mtk-pmic-keys - use get_irq_byname() instead of index
From: Mattijs Korpershoek @ 2022-01-21 14:03 UTC (permalink / raw)
To: Dmitry Torokhov, Matthias Brugger, Rob Herring
Cc: Fabien Parent, Kevin Hilman, linux-input, devicetree,
linux-arm-kernel, linux-mediatek, linux-kernel,
Mattijs Korpershoek
In-Reply-To: <20220121140323.4080640-1-mkorpershoek@baylibre.com>
Some pmics of the mt6397 family (such as MT6358), have two IRQs per
physical key: one for press event, another for release event.
The mtk-pmic-keys driver assumes that each key only has one
IRQ. The key index and the RES_IRQ resource index have a 1/1 mapping.
This won't work for MT6358, as we have multiple resources (2) for one key.
To prepare mtk-pmic-keys to support MT6358, retrieve IRQs by name
instead of by index.
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
---
drivers/input/keyboard/mtk-pmic-keys.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/input/keyboard/mtk-pmic-keys.c b/drivers/input/keyboard/mtk-pmic-keys.c
index 62391d6c7da6..d1abf95d5701 100644
--- a/drivers/input/keyboard/mtk-pmic-keys.c
+++ b/drivers/input/keyboard/mtk-pmic-keys.c
@@ -241,6 +241,7 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev)
unsigned int keycount;
struct mt6397_chip *pmic_chip = dev_get_drvdata(pdev->dev.parent);
struct device_node *node = pdev->dev.of_node, *child;
+ static const char *const irqnames[] = { "powerkey", "homekey" };
struct mtk_pmic_keys *keys;
const struct mtk_pmic_regs *mtk_pmic_regs;
struct input_dev *input_dev;
@@ -268,7 +269,8 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev)
input_dev->id.version = 0x0001;
keycount = of_get_available_child_count(node);
- if (keycount > MTK_PMIC_MAX_KEY_COUNT) {
+ if (keycount > MTK_PMIC_MAX_KEY_COUNT ||
+ keycount > ARRAY_SIZE(irqnames)) {
dev_err(keys->dev, "too many keys defined (%d)\n", keycount);
return -EINVAL;
}
@@ -276,7 +278,8 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev)
for_each_child_of_node(node, child) {
keys->keys[index].regs = &mtk_pmic_regs->keys_regs[index];
- keys->keys[index].irq = platform_get_irq(pdev, index);
+ keys->keys[index].irq =
+ platform_get_irq_byname(pdev, irqnames[index]);
if (keys->keys[index].irq < 0) {
of_node_put(child);
return keys->keys[index].irq;
--
2.32.0
^ permalink raw reply related
* [PATCH v4 0/4] input: MT6358 PMIC button support
From: Mattijs Korpershoek @ 2022-01-21 14:03 UTC (permalink / raw)
To: Dmitry Torokhov, Matthias Brugger, Rob Herring
Cc: Fabien Parent, Kevin Hilman, linux-input, devicetree,
linux-arm-kernel, linux-mediatek, linux-kernel,
Mattijs Korpershoek
The MediaTek MT6358 PMIC has support for two buttons: PWR and HOME.
The interrupt logic is a little different than other PMICs from the
same family:
for MT6323 and MT6397, we have one interrupt source per button
* for MT6358, we have two interrupts lines per button: the press and
* release interrupts are distinct sources.
Changes since v3 [1]:
* checkpatch.pl --strict fixes
Changes since v2 [2]:
* added 4th patch with device tree enable
* cover letter title prefixed with 'input'
This has been tested with evtest on mt8183-pumpkin on input/next
[1] https://lore.kernel.org/r/20210702134310.3451560-1-mkorpershoek@baylibre.com
[2] https://lore.kernel.org/r/id:20210512152648.39961-1-mkorpershoek@baylibre.com
Mattijs Korpershoek (4):
Input: mtk-pmic-keys - use get_irq_byname() instead of index
dt-bindings: input: mtk-pmic-keys: add MT6358 binding definition
Input: mtk-pmic-keys - add support for MT6358
arm64: dts: mt6358: add mt6358-keys node
.../bindings/input/mtk-pmic-keys.txt | 5 +-
arch/arm64/boot/dts/mediatek/mt6358.dtsi | 12 ++++
drivers/input/keyboard/mtk-pmic-keys.c | 55 +++++++++++++++++--
3 files changed, 67 insertions(+), 5 deletions(-)
base-commit: 87a0b2fafc09766d8c55461a18345a1cfb10a7fe
--
2.32.0
^ permalink raw reply
* [PATCH v4 3/4] Input: mtk-pmic-keys - add support for MT6358
From: Mattijs Korpershoek @ 2022-01-21 14:03 UTC (permalink / raw)
To: Dmitry Torokhov, Matthias Brugger, Rob Herring
Cc: Fabien Parent, Kevin Hilman, linux-input, devicetree,
linux-arm-kernel, linux-mediatek, linux-kernel,
Mattijs Korpershoek
In-Reply-To: <20220121140323.4080640-1-mkorpershoek@baylibre.com>
MT6358 pmic keys behave differently than mt6397 and mt6323: there are
two interrupts per key: one for press, the other one for release (_r)
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
---
drivers/input/keyboard/mtk-pmic-keys.c | 48 ++++++++++++++++++++++++--
1 file changed, 46 insertions(+), 2 deletions(-)
diff --git a/drivers/input/keyboard/mtk-pmic-keys.c b/drivers/input/keyboard/mtk-pmic-keys.c
index d1abf95d5701..c31ab4368388 100644
--- a/drivers/input/keyboard/mtk-pmic-keys.c
+++ b/drivers/input/keyboard/mtk-pmic-keys.c
@@ -9,6 +9,7 @@
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/mt6323/registers.h>
+#include <linux/mfd/mt6358/registers.h>
#include <linux/mfd/mt6397/core.h>
#include <linux/mfd/mt6397/registers.h>
#include <linux/module.h>
@@ -74,11 +75,22 @@ static const struct mtk_pmic_regs mt6323_regs = {
.pmic_rst_reg = MT6323_TOP_RST_MISC,
};
+static const struct mtk_pmic_regs mt6358_regs = {
+ .keys_regs[MTK_PMIC_PWRKEY_INDEX] =
+ MTK_PMIC_KEYS_REGS(MT6358_TOPSTATUS,
+ 0x2, MT6358_PSC_TOP_INT_CON0, 0x5),
+ .keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
+ MTK_PMIC_KEYS_REGS(MT6358_TOPSTATUS,
+ 0x8, MT6358_PSC_TOP_INT_CON0, 0xa),
+ .pmic_rst_reg = MT6358_TOP_RST_MISC,
+};
+
struct mtk_pmic_keys_info {
struct mtk_pmic_keys *keys;
const struct mtk_pmic_keys_regs *regs;
unsigned int keycode;
int irq;
+ int irq_r; /* optional: release irq if different */
bool wakeup:1;
};
@@ -188,6 +200,18 @@ static int mtk_pmic_key_setup(struct mtk_pmic_keys *keys,
return ret;
}
+ if (info->irq_r > 0) {
+ ret = devm_request_threaded_irq(keys->dev, info->irq_r, NULL,
+ mtk_pmic_keys_irq_handler_thread,
+ IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
+ "mtk-pmic-keys", info);
+ if (ret) {
+ dev_err(keys->dev, "Failed to request IRQ_r: %d: %d\n",
+ info->irq, ret);
+ return ret;
+ }
+ }
+
input_set_capability(keys->input_dev, EV_KEY, info->keycode);
return 0;
@@ -199,8 +223,11 @@ static int __maybe_unused mtk_pmic_keys_suspend(struct device *dev)
int index;
for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
- if (keys->keys[index].wakeup)
+ if (keys->keys[index].wakeup) {
enable_irq_wake(keys->keys[index].irq);
+ if (keys->keys[index].irq_r > 0)
+ enable_irq_wake(keys->keys[index].irq_r);
+ }
}
return 0;
@@ -212,8 +239,11 @@ static int __maybe_unused mtk_pmic_keys_resume(struct device *dev)
int index;
for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
- if (keys->keys[index].wakeup)
+ if (keys->keys[index].wakeup) {
disable_irq_wake(keys->keys[index].irq);
+ if (keys->keys[index].irq_r > 0)
+ disable_irq_wake(keys->keys[index].irq_r);
+ }
}
return 0;
@@ -229,6 +259,9 @@ static const struct of_device_id of_mtk_pmic_keys_match_tbl[] = {
}, {
.compatible = "mediatek,mt6323-keys",
.data = &mt6323_regs,
+ }, {
+ .compatible = "mediatek,mt6358-keys",
+ .data = &mt6358_regs,
}, {
/* sentinel */
}
@@ -242,6 +275,7 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev)
struct mt6397_chip *pmic_chip = dev_get_drvdata(pdev->dev.parent);
struct device_node *node = pdev->dev.of_node, *child;
static const char *const irqnames[] = { "powerkey", "homekey" };
+ static const char *const irqnames_r[] = { "powerkey_r", "homekey_r" };
struct mtk_pmic_keys *keys;
const struct mtk_pmic_regs *mtk_pmic_regs;
struct input_dev *input_dev;
@@ -285,6 +319,16 @@ static int mtk_pmic_keys_probe(struct platform_device *pdev)
return keys->keys[index].irq;
}
+ if (of_device_is_compatible(node, "mediatek,mt6358-keys")) {
+ keys->keys[index].irq_r = platform_get_irq_byname(pdev,
+ irqnames_r[index]);
+
+ if (keys->keys[index].irq_r < 0) {
+ of_node_put(child);
+ return keys->keys[index].irq_r;
+ }
+ }
+
error = of_property_read_u32(child,
"linux,keycodes", &keys->keys[index].keycode);
if (error) {
--
2.32.0
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