[PATCH v6 0/2] ZII RAVE platform driver

[PATCH v6 0/2] ZII RAVE platform driver

[Andrey Smirnov]

Hi everyone,

This patch series is v6 of the driver for supervisory processor found
on RAVE series of devices from ZII. Supervisory processor is a PIC
microcontroller connected to various electrical subsystems on RAVE
devices whose firmware implements protocol to command/qery them.

Changes since [v5]:

    - Fixed a build break, introduced by a last minute change in [v5]

    - Moved majority of attributes that were exposed over sysfs to debugfs

    - Document remaining sysfs attributes in Documentation/ABI/testing/sysfs-platform-rave-sp

Changes since [v4]:

    - Replaced usage of DEVICE_ATTR with DEVICE_ATTR_RW

    - Fixed a number of warnings produces by sparse tool

    - Incorporated event more feedback from Andy Shevchenko

    - Collected Reviewed-by from Andy

Changes since [v3]:

    - Re-collected lost Acked-by from Rob

    - Incorporated further feedback from Andy Shevchenko

    - Dropped useless change (stray newline) to drivers/mfd/Makefile

Changes since [v2]:

    - Fixed swapped command codes in rave_sp_common_get_boot_source()
      and rave_sp_common_set_boot_source() revealed by further testing
      of the code

    - Incorporated feedback from Andy Shevchenko

Changes since [v1]:

    - Updated wording in DT-bindings as per Rob's request.

    - Collected Rob's Acked-by for patch 2/2

NOTE:

 * The driver for "zii,rave-sp-watchdog" exists, but I haven't
   submitted it yet, becuase I wanted to make sure that API exposed by
   this MFD is acceptable and doesn't need drastic changes.

 * This driver is dependent on crc_ccitt_false() introduced in
   2da9378d531f8cc6670c7497f20d936b706ab80b in 'linux-next'

Feedback is greatly appreciated!

Thanks,
Andrey Smirnov

[v5] lkml.kernel.org/r/20170728142704.11156-1-andrew.smirnov@gmail.com
[v4] lkml.kernel.org/r/20170725184450.13171-1-andrew.smirnov@gmail.com
[v3] lkml.kernel.org/r/20170724150915.4824-1-andrew.smirnov@gmail.com
[v2] lkml.kernel.org/r/20170718175604.11735-1-andrew.smirnov@gmail.com
[v1] lkml.kernel.org/r/20170710170449.4544-1-andrew.smirnov@gmail.com

Andrey Smirnov (2):
  platform: Add driver for RAVE Supervisory Processor
  dt-bindings: mfd: Add bindings for ZII RAVE devices

 Documentation/ABI/testing/sysfs-platform-rave-sp   |   35 +
 .../devicetree/bindings/mfd/zii,rave-sp.txt        |   39 +
 drivers/platform/Kconfig                           |    2 +
 drivers/platform/Makefile                          |    1 +
 drivers/platform/rave/Kconfig                      |   26 +
 drivers/platform/rave/Makefile                     |    1 +
 drivers/platform/rave/rave-sp.c                    | 1190 ++++++++++++++++++++
 include/linux/rave-sp.h                            |   54 +
 8 files changed, 1348 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-platform-rave-sp
 create mode 100644 Documentation/devicetree/bindings/mfd/zii,rave-sp.txt
 create mode 100644 drivers/platform/rave/Kconfig
 create mode 100644 drivers/platform/rave/Makefile
 create mode 100644 drivers/platform/rave/rave-sp.c
 create mode 100644 include/linux/rave-sp.h

-- 
2.13.5

[PATCH v6 2/2] dt-bindings: mfd: Add bindings for ZII RAVE devices

[Andrey Smirnov]

Add Device Tree bindings for RAVE Supervisory Processor, an MCU
implementing varoius bits of housekeeping functionality (watchdoging,
backlight control, LED control, etc) on RAVE family of products by
Zodiac Inflight Innovations.

Cc: cphealy@gmail.com
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Pavel Machek <pavel@ucw.cz>
Acked-by: Rob Herring <robh+dt@kernel.org>
Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 .../devicetree/bindings/mfd/zii,rave-sp.txt        | 39 ++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/zii,rave-sp.txt

diff --git a/Documentation/devicetree/bindings/mfd/zii,rave-sp.txt b/Documentation/devicetree/bindings/mfd/zii,rave-sp.txt
new file mode 100644
index 000000000000..088eff9ddb78
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/zii,rave-sp.txt
@@ -0,0 +1,39 @@
+Zodiac Inflight Innovations RAVE Supervisory Processor
+
+RAVE Supervisory Processor communicates with SoC over UART. It is
+expected that its Device Tree node is specified as a child of a node
+corresponding to UART controller used for communication.
+
+Required parent device properties:
+
+ - compatible: Should be one of:
+	- "zii,rave-sp-niu"
+	- "zii,rave-sp-mezz"
+	- "zii,rave-sp-esb"
+	- "zii,rave-sp-rdu1"
+	- "zii,rave-sp-rdu2"
+
+ - current-speed: Should be set to baud rate SP device is using
+
+RAVE SP consists of the following sub-devices:
+
+Device				 Description
+------				 -----------
+rave-sp-wdt			: Watchdog
+rave-sp-nvmem			: Interface to onborad EEPROM
+rave-sp-backlight		: Display backlight
+rave-sp-hwmon			: Interface to onboard hardware sensors
+rave-sp-leds			: Interface to onboard LEDs
+rave-sp-input			: Interface to onboard power button
+
+Example of usage:
+
+	rdu {
+		compatible = "zii,rave-sp-rdu2";
+		current-speed = <1000000>;
+
+		watchdog {
+			compatible = "zii,rave-sp-watchdog";
+		};
+	};
+
-- 
2.13.5

Re: [PATCH v6 2/2] dt-bindings: mfd: Add bindings for ZII RAVE devices

[Lee Jones]

On Mon, 28 Aug 2017, Andrey Smirnov wrote:

> Add Device Tree bindings for RAVE Supervisory Processor, an MCU
> implementing varoius bits of housekeeping functionality (watchdoging,
> backlight control, LED control, etc) on RAVE family of products by
> Zodiac Inflight Innovations.
> 
> Cc: cphealy@gmail.com
> Cc: Lucas Stach <l.stach@pengutronix.de>
> Cc: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: devicetree@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Pavel Machek <pavel@ucw.cz>
> Acked-by: Rob Herring <robh+dt@kernel.org>
> Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
> ---
>  .../devicetree/bindings/mfd/zii,rave-sp.txt        | 39 ++++++++++++++++++++++
>  1 file changed, 39 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/zii,rave-sp.txt

Applied, thanks.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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