[PATCH v6 00/40] ep93xx device tree conversion

[PATCH v6 00/40] ep93xx device tree conversion

[Nikita Shubin via B4 Relay]

No major changes since last version all changes are cometic.

Following patches require attention from Stephen Boyd, as they were converted to aux_dev as suggested:

- ARM: ep93xx: add regmap aux_dev
- clk: ep93xx: add DT support for Cirrus EP93xx

DMA related patches still require Acked or Reviewed tags.

got approval LGTM from Miquel:
- mtd: rawnand: add support for ts72xx
Link: https://lore.kernel.org/lkml/20231004103911.2aa65354@xps-13/

new patches:

ARM: ep93xx:  Add terminator to gpiod_lookup_table
  - fixed terminator in gpiod_lockup_table

So mostly all patches got approval.

Patches should be now formated with '--histogram'

---
Changes in v6:

- clk: ep93xx: add DT support for Cirrus EP93xx
  - s/spin_lock_irqsave()/guard()/
  - refactor index check in ep93xx_mux_set_parent_lock() to something more readable
  - use in_range in ep93xx_mux_set_parent_lock()/ep93xx_ddiv_set_rate()
  - use GENMASK() in ep93xx_ddiv_recalc_rate()
  - comment reserved bit in ep93xx_ddiv_set_rate()
  - move out from loop ClkDiv value assigment
  - some style fixes

Andy, i was i asked to set index of XTALI explicitly, i am not setting ddiv_pdata 
there becouse only XTALI is jnown in advance, and i think setting them in one place is more convenient.

- pinctrl: add a Cirrus ep93xx SoC pin controller
  - drop OF from Kconfig
  - droped linux/of.h include
  - add space to */ where it is applicable
  - add coma in multiline assigment
  - "return NULL" as default case in ep93xx_get_group_name()
  - fixed casting id->driver_data
  - use device_set_of_node_from_dev()
  - use dev_err_probe()

- power: reset: Add a driver for the ep93xx reset
  - drop linux/of.h include

- soc: Add SoC driver for Cirrus ep93xx
  - s/GPL-2.0/GPL-2.0-only/
  - drop linux/kernel.h include
  - + blank line before linux/soc/cirrus/ep93xx.h
  - + blank line after ep93xx_get_soc_rev()
  - + coma for pinctrl_names
  - valid casting to int for of_device_get_match_data() return value

- mtd: rawnand: add support for ts72xx
  - return as part of switch case
  - s/iowrite8/iowrite8_rep/

- net: cirrus: add DT support for Cirrus EP93xx
  - fix header sorting

- dma: cirrus: Convert to DT for Cirrus EP93xx
  - use devm_clk_get
  - use is_slave_direction

Changes in v5:

- gpio: ep93xx: split device in multiple
  - ordered headers
  - use irqd_to_hwirq()
  - s/platform_get_irq()/platform_get_irq_optional()/
 
- [PATCH v4 02/42] ARM: ep93xx: add swlocked prototypes
  - replaced with ARM: ep93xx: add regmap aux_dev

- [PATCH v4 03/42] dt-bindings: clock: Add Cirrus EP93xx
  - fixed identation
  - removed EP93XX_CLK_END
  - and dropped it
  - clock bindings moved to syscon with renaming to cirrus,ep9301-syscon.h

- clk: ep93xx: add DT support for Cirrus EP93xx
  - convert to auxiliary and use parent device tree node
  - moved all clocks except XTALI here
  - used devm version everywhere and *_parent_hw() instead of passing name where it's possible
  - unfortunately devm_clk_hw_register_fixed_rate doesn't have a parent index version

- [PATCH v4 05/42] dt-bindings: pinctrl: Add Cirrus EP93xx
  - "unevaluatedProperties: false" for pins
  - returned "additionalProperties: false" where it was
  - and dropped it

- pinctrl: add a Cirrus ep93xx SoC pin controller
  - sorted includes
  - convert to auxiliary and use parent device tree node

- power: reset: Add a driver for the ep93xx reset
  - convert to auxiliary device

- dt-bindings: soc: Add Cirrus EP93xx
  - dropped all ref to reboot, clk, pinctrl subnodes
  - added pins, as it's now used for pinctrl
  - added #clock-cells, as it's now used for clk

- dt-bindings: pwm: Add Cirrus EP93xx
  - $ref to pwm.yaml
  - fixed 'pwm-cells'
  - s/additionalProperties/unevaluatedProperties/

- soc: Add SoC driver for Cirrus ep93xx
  - removed clocks, they are moved to clk auxiliary driver, as we dropped the clk dt node
  - removed all swlocked exported functions
  - dropped static spinlock
  - added instantiating auxiliary reboot, clk, pinctrl

- dt-bindings: spi: Add Cirrus EP93xx
  - Document DMA support

- spi: ep93xx: add DT support for Cirrus EP93xx
  - dropped CONFIG_OF and SPI/DMA platform data entirely
  - s/master/host/
  - reworked DMA setup so we can use probe defer

- dt-bindings: dma: Add Cirrus EP93xx
  - dropped bindings header (moved ports description to YAML)
  - changed '#dma-cells' to 2, we use port, direction in cells so we can drop platform code completely

- dma: cirrus: add DT support for Cirrus EP93xx
  - dropped platform probing completely
  - dropped struct ep93xx_dma_data replaced with internal struct ep93xx_dma_chan_cfg with port/direction
  - added xlate functions for m2m/m2p
  - we require filters to set dma_cfg before hw_setup

- dt-bindings: ata: Add Cirrus EP93xx
  - Document DMA support 

- ata: pata_ep93xx: add device tree support
  - drop DMA platform header with data
  - use DMA OF so we can defer probing until DMA is up

- ARM: dts: add Cirrus EP93XX SoC .dtsi
- ARM: dts: ep93xx: add ts7250 board
- ARM: dts: ep93xx: Add EDB9302 DT
  - replaced "eclk: clock-controller" to syscon reference
  - replaced "pinctrl: pinctrl" to syscon reference
  - gpios are now "enabled" by default
  - reworked i2s node
  - change all dma nodes and refs

- new additions to I2S
  - Document DMA
  - Document Audio Port usage
  - drop legacy DMA support

- Link to v4: https://lore.kernel.org/r/20230915-ep93xx-v4-0-a1d779dcec10@maquefel.me

Changes in v4:

- gpio: ep93xx: split device in multiple
  - s/generic_handle_irq/generic_handle_domain_irq/
  - s/int offset/irq_hw_number_t offset/ though now it looks a bit odd to me
  - drop i = 0
  - drop 'error'
  - use dev_err_probe withour printing devname once again

dt-bindings: clock: Add Cirrus EP93xx
  - renamed cirrus,ep93xx-clock.h -> cirrus,ep9301-clk.h

clk: ep93xx: add DT support for Cirrus EP93xx
  - drop unused includes
  - use .name only for xtali, pll1, pll2 parents
  - convert // to /*
  - pass clk_parent_data instead of char* clock name

dt-bindings: pinctrl: Add Cirrus EP93xx
  - s/additionalProperties/unevaluatedProperties/

dt-bindings: soc: Add Cirrus EP93xx
  - move syscon to soc directory
  - add vendor prefix
  - make reboot same style as pinctrl, clk
  - use absolute path for ref
  - expand example

soc: Add SoC driver for Cirrus ep93xx
  - s/0xf0000000/GENMASK(31, 28)/
  - s/ret/ep93xx_chip_revision(map)/
  - drop symbol exports
  - convert to platform driver

dt-bindings: rtc: Add Cirrus EP93xx
  - allOf: with $ref to rtc.yaml
  - s/additionalProperties/unevaluatedProperties/

dt-bindings: watchdog: Add Cirrus EP93x
  - drop description
  - reword

power: reset: Add a driver for the ep93xx reset
  - lets use 'GPL-2.0+' instead of '(GPL-2.0)'
  - s/of_device/of/
  - drop mdelay with warning
  - return 0 at the end

net: cirrus: add DT support for Cirrus EP93xx
  - fix leaking np

mtd: nand: add support for ts72xx
  - +bits.h
  - drop comment
  - ok to fwnode_get_next_child_node
  - use goto to put handle and nand and report error

ARM: dts: add Cirrus EP93XX SoC .dtsi
  - add simple-bus for ebi, as we don't require to setup anything
  - add arm,pl011 compatible to uart nodes
  - drop i2c-gpio, as it's isn't used anywhere

ARM: dts: ep93xx: add ts7250 board
  - generic node name for temperature-sensor
  - drop i2c
  - move nand, rtc, watchdog to ebi node
 
- Link to v3: https://lore.kernel.org/r/20230605-ep93xx-v3-0-3d63a5f1103e@maquefel.me

---
Alexander Sverdlin (3):
      ASoC: ep93xx: Drop legacy DMA support
      ARM: dts: ep93xx: Add EDB9302 DT
      ASoC: cirrus: edb93xx: Delete driver

Nikita Shubin (37):
      ARM: ep93xx:  Add terminator to gpiod_lookup_table
      gpio: ep93xx: split device in multiple
      ARM: ep93xx: add regmap aux_dev
      clk: ep93xx: add DT support for Cirrus EP93xx
      pinctrl: add a Cirrus ep93xx SoC pin controller
      power: reset: Add a driver for the ep93xx reset
      dt-bindings: soc: Add Cirrus EP93xx
      soc: Add SoC driver for Cirrus ep93xx
      dt-bindings: dma: Add Cirrus EP93xx
      dma: cirrus: Convert to DT for Cirrus EP93xx
      dt-bindings: watchdog: Add Cirrus EP93x
      watchdog: ep93xx: add DT support for Cirrus EP93xx
      dt-bindings: pwm: Add Cirrus EP93xx
      pwm: ep93xx: add DT support for Cirrus EP93xx
      dt-bindings: spi: Add Cirrus EP93xx
      spi: ep93xx: add DT support for Cirrus EP93xx
      dt-bindings: net: Add Cirrus EP93xx
      net: cirrus: add DT support for Cirrus EP93xx
      dt-bindings: mtd: Add ts7200 nand-controller
      mtd: rawnand: add support for ts72xx
      dt-bindings: ata: Add Cirrus EP93xx
      ata: pata_ep93xx: add device tree support
      dt-bindings: input: Add Cirrus EP93xx keypad
      input: keypad: ep93xx: add DT support for Cirrus EP93xx
      dt-bindings: wdt: Add ts72xx
      wdt: ts72xx: add DT support for ts72xx
      gpio: ep93xx: add DT support for gpio-ep93xx
      ASoC: dt-bindings: ep93xx: Document DMA support
      ASoC: dt-bindings: ep93xx: Document Audio Port support
      ARM: dts: add Cirrus EP93XX SoC .dtsi
      ARM: dts: ep93xx: add ts7250 board
      ARM: ep93xx: DT for the Cirrus ep93xx SoC platforms
      pwm: ep93xx: drop legacy pinctrl
      ata: pata_ep93xx: remove legacy pinctrl use
      ARM: ep93xx: delete all boardfiles
      ARM: ep93xx: soc: drop defines
      dma: cirrus: remove platform code

 .../bindings/arm/cirrus/cirrus,ep9301.yaml         |   38 +
 .../bindings/ata/cirrus,ep9312-pata.yaml           |   42 +
 .../bindings/dma/cirrus,ep9301-dma-m2m.yaml        |   84 ++
 .../bindings/dma/cirrus,ep9301-dma-m2p.yaml        |  144 ++
 .../bindings/input/cirrus,ep9307-keypad.yaml       |   87 ++
 .../devicetree/bindings/mtd/technologic,nand.yaml  |   45 +
 .../devicetree/bindings/net/cirrus,ep9301-eth.yaml |   59 +
 .../devicetree/bindings/pwm/cirrus,ep9301-pwm.yaml |   53 +
 .../bindings/soc/cirrus/cirrus,ep9301-syscon.yaml  |   94 ++
 .../bindings/sound/cirrus,ep9301-i2s.yaml          |   16 +
 .../devicetree/bindings/spi/cirrus,ep9301-spi.yaml |   70 +
 .../bindings/watchdog/cirrus,ep9301-wdt.yaml       |   42 +
 .../bindings/watchdog/technologic,ts7200-wdt.yaml  |   45 +
 arch/arm/Makefile                                  |    1 -
 arch/arm/boot/dts/cirrus/Makefile                  |    4 +
 arch/arm/boot/dts/cirrus/ep93xx-bk3.dts            |  126 ++
 arch/arm/boot/dts/cirrus/ep93xx-edb9302.dts        |  182 +++
 arch/arm/boot/dts/cirrus/ep93xx-ts7250.dts         |  145 ++
 arch/arm/boot/dts/cirrus/ep93xx.dtsi               |  441 ++++++
 arch/arm/mach-ep93xx/Kconfig                       |   20 +-
 arch/arm/mach-ep93xx/Makefile                      |   11 -
 arch/arm/mach-ep93xx/clock.c                       |  733 ----------
 arch/arm/mach-ep93xx/core.c                        | 1017 --------------
 arch/arm/mach-ep93xx/dma.c                         |  114 --
 arch/arm/mach-ep93xx/edb93xx.c                     |  344 -----
 arch/arm/mach-ep93xx/ep93xx-regs.h                 |   38 -
 arch/arm/mach-ep93xx/gpio-ep93xx.h                 |  111 --
 arch/arm/mach-ep93xx/hardware.h                    |   25 -
 arch/arm/mach-ep93xx/irqs.h                        |   76 --
 arch/arm/mach-ep93xx/platform.h                    |   42 -
 arch/arm/mach-ep93xx/soc.h                         |  212 ---
 arch/arm/mach-ep93xx/timer-ep93xx.c                |  143 --
 arch/arm/mach-ep93xx/ts72xx.c                      |  422 ------
 arch/arm/mach-ep93xx/ts72xx.h                      |   94 --
 arch/arm/mach-ep93xx/vision_ep9307.c               |  311 -----
 drivers/ata/pata_ep93xx.c                          |  106 +-
 drivers/clk/Kconfig                                |    8 +
 drivers/clk/Makefile                               |    1 +
 drivers/clk/clk-ep93xx.c                           |  849 ++++++++++++
 drivers/dma/ep93xx_dma.c                           |  286 +++-
 drivers/gpio/gpio-ep93xx.c                         |  345 ++---
 drivers/input/keyboard/ep93xx_keypad.c             |   74 +-
 drivers/mtd/nand/raw/Kconfig                       |    7 +
 drivers/mtd/nand/raw/Makefile                      |    1 +
 drivers/mtd/nand/raw/technologic-nand-controller.c |  220 +++
 drivers/net/ethernet/cirrus/ep93xx_eth.c           |   63 +-
 drivers/pinctrl/Kconfig                            |    7 +
 drivers/pinctrl/Makefile                           |    1 +
 drivers/pinctrl/pinctrl-ep93xx.c                   | 1430 ++++++++++++++++++++
 drivers/power/reset/Kconfig                        |   10 +
 drivers/power/reset/Makefile                       |    1 +
 drivers/power/reset/ep93xx-restart.c               |   80 ++
 drivers/pwm/pwm-ep93xx.c                           |   26 +-
 drivers/soc/Kconfig                                |    1 +
 drivers/soc/Makefile                               |    1 +
 drivers/soc/cirrus/Kconfig                         |   13 +
 drivers/soc/cirrus/Makefile                        |    2 +
 drivers/soc/cirrus/soc-ep93xx.c                    |  247 ++++
 drivers/spi/spi-ep93xx.c                           |   68 +-
 drivers/watchdog/ep93xx_wdt.c                      |    8 +
 drivers/watchdog/ts72xx_wdt.c                      |    8 +
 include/dt-bindings/clock/cirrus,ep9301-syscon.h   |   46 +
 include/linux/platform_data/dma-ep93xx.h           |   94 --
 include/linux/platform_data/eth-ep93xx.h           |   10 -
 include/linux/platform_data/keypad-ep93xx.h        |   32 -
 include/linux/platform_data/spi-ep93xx.h           |   15 -
 include/linux/soc/cirrus/ep93xx.h                  |   47 +-
 sound/soc/cirrus/Kconfig                           |    9 -
 sound/soc/cirrus/Makefile                          |    4 -
 sound/soc/cirrus/edb93xx.c                         |  117 --
 sound/soc/cirrus/ep93xx-i2s.c                      |   19 -
 sound/soc/cirrus/ep93xx-pcm.c                      |   19 +-
 72 files changed, 5192 insertions(+), 4514 deletions(-)
---
base-commit: 26aff849438cebcd05f1a647390c4aa700d5c0f1
change-id: 20230605-ep93xx-01c76317e2d2

Best regards,
-- 
Nikita Shubin <nikita.shubin@maquefel.me>


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[PATCH v6 19/40] dt-bindings: mtd: Add ts7200 nand-controller

[Nikita Shubin via B4 Relay]

From: Nikita Shubin <nikita.shubin@maquefel.me>

Add YAML bindings for ts7200 NAND Controller.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
---
 .../devicetree/bindings/mtd/technologic,nand.yaml  | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/technologic,nand.yaml b/Documentation/devicetree/bindings/mtd/technologic,nand.yaml
new file mode 100644
index 000000000000..f9d87c46094b
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/technologic,nand.yaml
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/technologic,nand.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Technologic Systems NAND controller
+
+maintainers:
+  - Nikita Shubin <nikita.shubin@maquefel.me>
+
+allOf:
+  - $ref: nand-controller.yaml
+
+properties:
+  compatible:
+    oneOf:
+      - const: technologic,ts7200-nand
+      - items:
+          - enum:
+              - technologic,ts7300-nand
+              - technologic,ts7260-nand
+              - technologic,ts7250-nand
+          - const: technologic,ts7200-nand
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    nand-controller@60000000 {
+        compatible = "technologic,ts7200-nand";
+        reg = <0x60000000 0x8000000>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        nand@0 {
+           reg = <0>;
+        };
+    };

-- 
2.41.0


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[PATCH v6 20/40] mtd: rawnand: add support for ts72xx

[Nikita Shubin via B4 Relay]

From: Nikita Shubin <nikita.shubin@maquefel.me>

Technologic Systems has it's own nand controller implementation in CPLD.

Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
---
 drivers/mtd/nand/raw/Kconfig                       |   7 +
 drivers/mtd/nand/raw/Makefile                      |   1 +
 drivers/mtd/nand/raw/technologic-nand-controller.c | 220 +++++++++++++++++++++
 3 files changed, 228 insertions(+)

diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index cbf8ae85e1ae..3937c10dea1c 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -449,6 +449,13 @@ config MTD_NAND_RENESAS
 	  Enables support for the NAND controller found on Renesas R-Car
 	  Gen3 and RZ/N1 SoC families.
 
+config MTD_NAND_TS72XX
+	tristate "ts72xx NAND controller"
+	depends on ARCH_EP93XX && HAS_IOMEM
+	help
+	  Enables support for NAND controller on ts72xx SBCs.
+	  This is a legacy driver based on gen_nand.
+
 comment "Misc"
 
 config MTD_SM_COMMON
diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile
index 25120a4afada..d0b0e6b83568 100644
--- a/drivers/mtd/nand/raw/Makefile
+++ b/drivers/mtd/nand/raw/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_MTD_NAND_MLC_LPC32XX)      += lpc32xx_mlc.o
 obj-$(CONFIG_MTD_NAND_SH_FLCTL)		+= sh_flctl.o
 obj-$(CONFIG_MTD_NAND_MXC)		+= mxc_nand.o
 obj-$(CONFIG_MTD_NAND_SOCRATES)		+= socrates_nand.o
+obj-$(CONFIG_MTD_NAND_TS72XX)           += technologic-nand-controller.o
 obj-$(CONFIG_MTD_NAND_TXX9NDFMC)	+= txx9ndfmc.o
 obj-$(CONFIG_MTD_NAND_MPC5121_NFC)	+= mpc5121_nfc.o
 obj-$(CONFIG_MTD_NAND_VF610_NFC)	+= vf610_nfc.o
diff --git a/drivers/mtd/nand/raw/technologic-nand-controller.c b/drivers/mtd/nand/raw/technologic-nand-controller.c
new file mode 100644
index 000000000000..63157e7b5572
--- /dev/null
+++ b/drivers/mtd/nand/raw/technologic-nand-controller.c
@@ -0,0 +1,220 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Technologic Systems TS72xx NAND controller driver
+ *
+ * Copyright (C) 2023 Nikita Shubin <nikita.shubin@maquefel.me>
+ *
+ * Derived from: plat_nand.c
+ *  Author: Vitaly Wool <vitalywool@gmail.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/platnand.h>
+
+#define TS72XX_NAND_CONTROL_ADDR_LINE	BIT(22)	/* 0xN0400000 */
+#define TS72XX_NAND_BUSY_ADDR_LINE	BIT(23)	/* 0xN0800000 */
+
+#define TS72XX_NAND_ALE			BIT(0)
+#define TS72XX_NAND_CLE			BIT(1)
+#define TS72XX_NAND_NCE			BIT(2)
+
+#define TS72XX_NAND_CTRL_CLE		(TS72XX_NAND_NCE | TS72XX_NAND_CLE)
+#define TS72XX_NAND_CTRL_ALE		(TS72XX_NAND_NCE | TS72XX_NAND_ALE)
+
+struct ts72xx_nand_data {
+	struct nand_controller	controller;
+	struct nand_chip	chip;
+	void __iomem		*base;
+	void __iomem		*ctrl;
+	void __iomem		*busy;
+};
+
+static inline struct ts72xx_nand_data *chip_to_ts72xx(struct nand_chip *chip)
+{
+	return container_of(chip, struct ts72xx_nand_data, chip);
+}
+
+static int ts72xx_nand_attach_chip(struct nand_chip *chip)
+{
+	switch (chip->ecc.engine_type) {
+	case NAND_ECC_ENGINE_TYPE_ON_HOST:
+		return -EINVAL;
+	case NAND_ECC_ENGINE_TYPE_SOFT:
+		if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
+			chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
+		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
+		fallthrough;
+	default:
+		return 0;
+	}
+}
+
+static void ts72xx_nand_ctrl(struct nand_chip *chip, u8 value)
+{
+	struct ts72xx_nand_data *data = chip_to_ts72xx(chip);
+	unsigned char bits = ioread8(data->ctrl) & ~GENMASK(2, 0);
+
+	iowrite8(bits | value, data->ctrl);
+}
+
+static int ts72xx_nand_exec_instr(struct nand_chip *chip,
+				const struct nand_op_instr *instr)
+{
+	struct ts72xx_nand_data *data = chip_to_ts72xx(chip);
+	unsigned int timeout_us;
+	u32 status;
+	int ret;
+
+	switch (instr->type) {
+	case NAND_OP_CMD_INSTR:
+		ts72xx_nand_ctrl(chip, TS72XX_NAND_CTRL_CLE);
+		iowrite8(instr->ctx.cmd.opcode, data->base);
+		ts72xx_nand_ctrl(chip, TS72XX_NAND_NCE);
+		break;
+
+	case NAND_OP_ADDR_INSTR:
+		ts72xx_nand_ctrl(chip, TS72XX_NAND_CTRL_ALE);
+		iowrite8_rep(data->base, instr->ctx.addr.addrs, instr->ctx.addr.naddrs);
+		ts72xx_nand_ctrl(chip, TS72XX_NAND_NCE);
+		break;
+
+	case NAND_OP_DATA_IN_INSTR:
+		ioread8_rep(data->base, instr->ctx.data.buf.in, instr->ctx.data.len);
+		break;
+
+	case NAND_OP_DATA_OUT_INSTR:
+		iowrite8_rep(data->base, instr->ctx.data.buf.in, instr->ctx.data.len);
+		break;
+
+	case NAND_OP_WAITRDY_INSTR:
+		timeout_us = instr->ctx.waitrdy.timeout_ms * 1000;
+		ret = readb_poll_timeout(data->busy, status, status & BIT(5), 0, timeout_us);
+		if (ret)
+			return ret;
+
+		break;
+	}
+
+	if (instr->delay_ns)
+		ndelay(instr->delay_ns);
+
+	return 0;
+}
+
+static int ts72xx_nand_exec_op(struct nand_chip *chip,
+			       const struct nand_operation *op, bool check_only)
+{
+	unsigned int i;
+	int ret;
+
+	if (check_only)
+		return 0;
+
+	for (i = 0; i < op->ninstrs; i++) {
+		ret = ts72xx_nand_exec_instr(chip, &op->instrs[i]);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static const struct nand_controller_ops ts72xx_nand_ops = {
+	.attach_chip = ts72xx_nand_attach_chip,
+	.exec_op = ts72xx_nand_exec_op,
+};
+
+static int ts72xx_nand_probe(struct platform_device *pdev)
+{
+	struct ts72xx_nand_data *data;
+	struct fwnode_handle *child;
+	struct mtd_info *mtd;
+	int err;
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	nand_controller_init(&data->controller);
+	data->controller.ops = &ts72xx_nand_ops;
+	data->chip.controller = &data->controller;
+
+	data->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(data->base))
+		return PTR_ERR(data->base);
+	data->ctrl = data->base + TS72XX_NAND_CONTROL_ADDR_LINE;
+	data->busy = data->base + TS72XX_NAND_BUSY_ADDR_LINE;
+
+	child = fwnode_get_next_child_node(dev_fwnode(&pdev->dev), NULL);
+	if (!child)
+		return dev_err_probe(&pdev->dev, -ENXIO,
+				"ts72xx controller node should have exactly one child\n");
+
+	nand_set_flash_node(&data->chip, to_of_node(child));
+	mtd = nand_to_mtd(&data->chip);
+	mtd->dev.parent = &pdev->dev;
+	platform_set_drvdata(pdev, data);
+
+	/*
+	 * This driver assumes that the default ECC engine should be TYPE_SOFT.
+	 * Set ->engine_type before registering the NAND devices in order to
+	 * provide a driver specific default value.
+	 */
+	data->chip.ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
+
+	/* Scan to find existence of the device */
+	err = nand_scan(&data->chip, 1);
+	if (err)
+		goto err_handle_put;
+
+	err = mtd_device_parse_register(mtd, NULL, NULL, NULL, 0);
+	if (err)
+		goto err_clean_nand;
+
+	return 0;
+
+err_clean_nand:
+	nand_cleanup(&data->chip);
+err_handle_put:
+	fwnode_handle_put(child);
+	return err;
+}
+
+static void ts72xx_nand_remove(struct platform_device *pdev)
+{
+	struct ts72xx_nand_data *data = platform_get_drvdata(pdev);
+	struct nand_chip *chip = &data->chip;
+	int ret;
+
+	ret = mtd_device_unregister(nand_to_mtd(chip));
+	WARN_ON(ret);
+	nand_cleanup(chip);
+}
+
+static const struct of_device_id ts72xx_id_table[] = {
+	{ .compatible = "technologic,ts7200-nand" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ts72xx_id_table);
+
+static struct platform_driver ts72xx_nand_driver = {
+	.driver = {
+		.name = "ts72xx-nand",
+		.of_match_table = ts72xx_id_table,
+	},
+	.probe = ts72xx_nand_probe,
+	.remove_new = ts72xx_nand_remove,
+};
+module_platform_driver(ts72xx_nand_driver);
+
+MODULE_AUTHOR("Nikita Shubin <nikita.shubin@maquefel.me>");
+MODULE_DESCRIPTION("Technologic Systems TS72xx NAND controller driver");
+MODULE_LICENSE("GPL");

-- 
2.41.0


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Re: [PATCH v6 20/40] mtd: rawnand: add support for ts72xx

[Greg Kroah-Hartman]

On Tue, Dec 12, 2023 at 11:20:37AM +0300, Nikita Shubin via B4 Relay wrote:
> From: Nikita Shubin <nikita.shubin@maquefel.me>
> 
> Technologic Systems has it's own nand controller implementation in CPLD.
> 
> Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
> ---
>  drivers/mtd/nand/raw/Kconfig                       |   7 +
>  drivers/mtd/nand/raw/Makefile                      |   1 +
>  drivers/mtd/nand/raw/technologic-nand-controller.c | 220 +++++++++++++++++++++
>  3 files changed, 228 insertions(+)
> 
> diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
> index cbf8ae85e1ae..3937c10dea1c 100644
> --- a/drivers/mtd/nand/raw/Kconfig
> +++ b/drivers/mtd/nand/raw/Kconfig
> @@ -449,6 +449,13 @@ config MTD_NAND_RENESAS
>  	  Enables support for the NAND controller found on Renesas R-Car
>  	  Gen3 and RZ/N1 SoC families.
>  
> +config MTD_NAND_TS72XX
> +	tristate "ts72xx NAND controller"
> +	depends on ARCH_EP93XX && HAS_IOMEM
> +	help
> +	  Enables support for NAND controller on ts72xx SBCs.
> +	  This is a legacy driver based on gen_nand.

Why is a new "legacy driver" being written these days?  Why not do it
properly?

thanks,

greg k-h

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Re: [PATCH v6 20/40] mtd: rawnand: add support for ts72xx

[Nikita Shubin]

Hello Greg!

On Tue, 2023-12-12 at 09:30 +0100, Greg Kroah-Hartman wrote:
> On Tue, Dec 12, 2023 at 11:20:37AM +0300, Nikita Shubin via B4 Relay
> wrote:
> > From: Nikita Shubin <nikita.shubin@maquefel.me>
> > 
> > Technologic Systems has it's own nand controller implementation in
> > CPLD.
> > 
> > Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
> > ---
> >  drivers/mtd/nand/raw/Kconfig                       |   7 +
> >  drivers/mtd/nand/raw/Makefile                      |   1 +
> >  drivers/mtd/nand/raw/technologic-nand-controller.c | 220
> > +++++++++++++++++++++
> >  3 files changed, 228 insertions(+)
> > 
> > diff --git a/drivers/mtd/nand/raw/Kconfig
> > b/drivers/mtd/nand/raw/Kconfig
> > index cbf8ae85e1ae..3937c10dea1c 100644
> > --- a/drivers/mtd/nand/raw/Kconfig
> > +++ b/drivers/mtd/nand/raw/Kconfig
> > @@ -449,6 +449,13 @@ config MTD_NAND_RENESAS
> >           Enables support for the NAND controller found on Renesas
> > R-Car
> >           Gen3 and RZ/N1 SoC families.
> >  
> > +config MTD_NAND_TS72XX
> > +       tristate "ts72xx NAND controller"
> > +       depends on ARCH_EP93XX && HAS_IOMEM
> > +       help
> > +         Enables support for NAND controller on ts72xx SBCs.
> > +         This is a legacy driver based on gen_nand.
> 
> Why is a new "legacy driver" being written these days?  Why not do it
> properly?

Sorry, my bad, description is a leftover from older description (when i
was allowed to submit a legacy one).

The driver is mostly new, shiny and approved by Miquel:

https://lore.kernel.org/lkml/20231004103911.2aa65354@xps-13/

The KConfig description should be fixed.

> 
> thanks,
> 
> greg k-h


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Re: [PATCH v6 00/40] ep93xx device tree conversion

[Uwe Kleine-König]

[-- Attachment #1.1: Type: text/plain, Size: 1179 bytes --]

Hello,

On Tue, Dec 12, 2023 at 11:20:17AM +0300, Nikita Shubin via B4 Relay wrote:
> No major changes since last version all changes are cometic.
> 
> Following patches require attention from Stephen Boyd, as they were converted to aux_dev as suggested:
> 
> - ARM: ep93xx: add regmap aux_dev
> - clk: ep93xx: add DT support for Cirrus EP93xx
> 
> DMA related patches still require Acked or Reviewed tags.
> 
> got approval LGTM from Miquel:
> - mtd: rawnand: add support for ts72xx
> Link: https://lore.kernel.org/lkml/20231004103911.2aa65354@xps-13/
> 
> new patches:
> 
> ARM: ep93xx:  Add terminator to gpiod_lookup_table
>   - fixed terminator in gpiod_lockup_table
> 
> So mostly all patches got approval.
> 
> Patches should be now formated with '--histogram'

You didn't mention how this should be merged. IIRC for the earlier
rounds the idea was to merge it all together via arm-soc when all
necessary agreement is reached. I assume that's still the case here?

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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[-- Attachment #2: Type: text/plain, Size: 144 bytes --]

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Re: [PATCH v6 20/40] mtd: rawnand: add support for ts72xx

[Miquel Raynal]

Hello,

nikita.shubin@maquefel.me wrote on Tue, 12 Dec 2023 11:35:48 +0300:

> Hello Greg!
> 
> On Tue, 2023-12-12 at 09:30 +0100, Greg Kroah-Hartman wrote:
> > On Tue, Dec 12, 2023 at 11:20:37AM +0300, Nikita Shubin via B4 Relay
> > wrote:  
> > > From: Nikita Shubin <nikita.shubin@maquefel.me>
> > > 
> > > Technologic Systems has it's own nand controller implementation in
> > > CPLD.
> > > 
> > > Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
> > > ---
> > >  drivers/mtd/nand/raw/Kconfig                       |   7 +
> > >  drivers/mtd/nand/raw/Makefile                      |   1 +
> > >  drivers/mtd/nand/raw/technologic-nand-controller.c | 220
> > > +++++++++++++++++++++
> > >  3 files changed, 228 insertions(+)
> > > 
> > > diff --git a/drivers/mtd/nand/raw/Kconfig
> > > b/drivers/mtd/nand/raw/Kconfig
> > > index cbf8ae85e1ae..3937c10dea1c 100644
> > > --- a/drivers/mtd/nand/raw/Kconfig
> > > +++ b/drivers/mtd/nand/raw/Kconfig
> > > @@ -449,6 +449,13 @@ config MTD_NAND_RENESAS
> > >           Enables support for the NAND controller found on Renesas
> > > R-Car
> > >           Gen3 and RZ/N1 SoC families.
> > >  
> > > +config MTD_NAND_TS72XX
> > > +       tristate "ts72xx NAND controller"
> > > +       depends on ARCH_EP93XX && HAS_IOMEM
> > > +       help
> > > +         Enables support for NAND controller on ts72xx SBCs.
> > > +         This is a legacy driver based on gen_nand.  
> > 
> > Why is a new "legacy driver" being written these days?  Why not do it
> > properly?  
> 
> Sorry, my bad, description is a leftover from older description (when i
> was allowed to submit a legacy one).
> 
> The driver is mostly new, shiny and approved by Miquel:
> 
> https://lore.kernel.org/lkml/20231004103911.2aa65354@xps-13/
> 
> The KConfig description should be fixed.

Indeed, later submissions carried a brand new implementation which no
longer leverages any legacy hook. The Kconfig description is wrong,
good catch.

Thanks,
Miquèl

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Re: [PATCH v6 00/40] ep93xx device tree conversion

[Andy Shevchenko]

On Tue, Dec 12, 2023 at 11:20:17AM +0300, Nikita Shubin wrote:
> No major changes since last version all changes are cometic.
> 
> Following patches require attention from Stephen Boyd, as they were converted to aux_dev as suggested:
> 
> - ARM: ep93xx: add regmap aux_dev
> - clk: ep93xx: add DT support for Cirrus EP93xx
> 
> DMA related patches still require Acked or Reviewed tags.
> 
> got approval LGTM from Miquel:
> - mtd: rawnand: add support for ts72xx
> Link: https://lore.kernel.org/lkml/20231004103911.2aa65354@xps-13/
> 
> new patches:
> 
> ARM: ep93xx:  Add terminator to gpiod_lookup_table
>   - fixed terminator in gpiod_lockup_table
> 
> So mostly all patches got approval.
> 
> Patches should be now formated with '--histogram'

It _feels_ like some tags might be missing.
In any case I suggest to use `b4` tool to retrieve tags when preparing
the next version:

	git checkout -b vXX v6.7-rcX
	b4 am -slt $MSG_ID_OF_v(XX-1)
	git am ...
	git rebase --interactive ... # to address comments

-- 
With Best Regards,
Andy Shevchenko



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Re: [PATCH v6 20/40] mtd: rawnand: add support for ts72xx

[Miquel Raynal]

Hi Nikita,

devnull+nikita.shubin.maquefel.me@kernel.org wrote on Tue, 12 Dec 2023
11:20:37 +0300:

> From: Nikita Shubin <nikita.shubin@maquefel.me>
> 
> Technologic Systems has it's own nand controller implementation in CPLD.
> 
> Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>

I'm fine with this version, I could collect patches 19 and 20 through
mtd but I saw no clear answer to the cover letter, regarding who should
pickup the patches. Let me know what you prefer.

Thanks,
Miquèl

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Re: [PATCH v6 20/40] mtd: rawnand: add support for ts72xx

[Nikita Shubin]

Hello Miquel and Uwe.

On Fri, 2023-12-15 at 11:16 +0100, Miquel Raynal wrote:
> Hi Nikita,
> 
> devnull+nikita.shubin.maquefel.me@kernel.org wrote on Tue, 12 Dec
> 2023
> 11:20:37 +0300:
> 
> > From: Nikita Shubin <nikita.shubin@maquefel.me>
> > 
> > Technologic Systems has it's own nand controller implementation in
> > CPLD.
> > 
> > Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
> 
> I'm fine with this version, I could collect patches 19 and 20 through
> mtd but I saw no clear answer to the cover letter, regarding who
> should
> pickup the patches. Let me know what you prefer.

This is still planned going via arm-soc branch, as these patches are
pretty useless without ep93xx totally converted to device tree.

> 
> Thanks,
> Miquèl


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Re: [PATCH v6 20/40] mtd: rawnand: add support for ts72xx

[Miquel Raynal]

Hi Nikita,

nikita.shubin@maquefel.me wrote on Fri, 15 Dec 2023 15:11:02 +0300:

> Hello Miquel and Uwe.
> 
> On Fri, 2023-12-15 at 11:16 +0100, Miquel Raynal wrote:
> > Hi Nikita,
> > 
> > devnull+nikita.shubin.maquefel.me@kernel.org wrote on Tue, 12 Dec
> > 2023
> > 11:20:37 +0300:
> >   
> > > From: Nikita Shubin <nikita.shubin@maquefel.me>
> > > 
> > > Technologic Systems has it's own nand controller implementation in
> > > CPLD.
> > > 
> > > Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>  
> > 
> > I'm fine with this version, I could collect patches 19 and 20 through
> > mtd but I saw no clear answer to the cover letter, regarding who
> > should
> > pickup the patches. Let me know what you prefer.  
> 
> This is still planned going via arm-soc branch, as these patches are
> pretty useless without ep93xx totally converted to device tree.

Alright, so I will not take these patches for the next merge window.

Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>

Thanks,
Miquèl

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Re: [PATCH v6 00/40] ep93xx device tree conversion

[Nikita Shubin]

Hello Andy!

On Wed, 2023-12-13 at 19:59 +0200, Andy Shevchenko wrote:
> On Tue, Dec 12, 2023 at 11:20:17AM +0300, Nikita Shubin wrote:
> > No major changes since last version all changes are cometic.
> > 
> > Following patches require attention from Stephen Boyd, as they were
> > converted to aux_dev as suggested:
> > 
> > - ARM: ep93xx: add regmap aux_dev
> > - clk: ep93xx: add DT support for Cirrus EP93xx
> > 
> > DMA related patches still require Acked or Reviewed tags.
> > 
> > got approval LGTM from Miquel:
> > - mtd: rawnand: add support for ts72xx
> > Link: https://lore.kernel.org/lkml/20231004103911.2aa65354@xps-13/
> > 
> > new patches:
> > 
> > ARM: ep93xx:  Add terminator to gpiod_lookup_table
> >   - fixed terminator in gpiod_lockup_table
> > 
> > So mostly all patches got approval.
> > 
> > Patches should be now formated with '--histogram'
> 
> It _feels_ like some tags might be missing.
> In any case I suggest to use `b4` tool to retrieve tags when
> preparing
> the next version:
> 
>         git checkout -b vXX v6.7-rcX
>         b4 am -slt $MSG_ID_OF_v(XX-1)
>         git am ...
>         git rebase --interactive ... # to address comments
> 

I moved to b4 a few iterations ago:

```
Calculating patch-ids from commits, this may take a moment...
Checking change-id "20230605-ep93xx-01c76317e2d2"
Grabbing search results from lore.kernel.org
Grabbing thread from lore.kernel.org/all/20230424123522.18302-1-
nikita.shubin%40maquefel.me/t.mbox.gz
---
NOTE: some trailers ignored due to from/email mismatches:
    ! Trailer: Tested-by: Michael Peters <mpeters@embeddedTS.com>
     Msg From: Kris Bahnsen <kris@embeddedTS.com>
NOTE: Rerun with -S to apply them anyway
No trailer updates found.
```

I haven't found any missing tags, that b4 didn't apply, the ones above
refer to a very old iteration and were given to cover letter and i
don't feel like they need to be included.

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Re: [PATCH v6 00/40] ep93xx device tree conversion

[Andy Shevchenko]

On Sat, Dec 23, 2023 at 11:13 AM Nikita Shubin
<nikita.shubin@maquefel.me> wrote:
> On Wed, 2023-12-13 at 19:59 +0200, Andy Shevchenko wrote:

...

> I haven't found any missing tags, that b4 didn't apply, the ones above
> refer to a very old iteration and were given to cover letter and i
> don't feel like they need to be included.

When somebody gives you a tag against a cover letter, it means the
entire series (if not spelled differently). `b4` even has a parameter
-t for that IIRC.


-- 
With Best Regards,
Andy Shevchenko

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