Re: [PATCH V4 1/3] mfd: add support for ams AS3722 PMIC

On Wed, 02 Oct 2013, Laxman Dewangan wrote:

The ams AS3722 is a compact system PMU suitable for mobile phones,
tablets etc. It has 4 DC/DC step-down regulators, 3 DC/DC step-down
controller, 11 LDOs, RTC, automatic battery, temperature and
over-current monitoring, 8 GPIOs, ADC and a watchdog.

Add MFD core driver for the AS3722 to support core functionality.

Signed-off-by: Laxman Dewangan <redacted>
Signed-off-by: Florian Lobmaier <redacted>
---
Changes from V1:
- Remove compatible string from DT for subnode.
- Nit cleanups in driver and use module_i2c_driver
        
Changes from V2:
- Change DT file to reflect the changes in gpio/pincntrl driver.
  Now there is no extra subnode.

Changes from V3:
- Combine DT of pincontrol and regulator to mfd.
- Nits cleanups.
- AMS to ams.

 Documentation/devicetree/bindings/mfd/as3722.txt |  174 +++++++++
 drivers/mfd/Kconfig                              |   12 +
 drivers/mfd/Makefile                             |    1 +
 drivers/mfd/as3722.c                             |  449 ++++++++++++++++++++++
 include/linux/mfd/as3722.h                       |  423 ++++++++++++++++++++
 5 files changed, 1059 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mfd/as3722.txt
 create mode 100644 drivers/mfd/as3722.c
 create mode 100644 include/linux/mfd/as3722.h

<snip>

+Required properties:
+-------------------
+- compatible: Must be "ams,as3722".
+- reg: I2C device address.
+- interrupt-controller: AS3722 has internal interrupt controller which takes the
+  interrupt request from  internal sub-blocks like RTC, regulators,

Silly nit: Attention to detail 'from..internal'.

GPIOs as well

80 chars

+  as external input.
+- #interrupt-cells: Should be set to 2 for IRQ number and flags.
+  The first cell is the IRQ number.
+  The second cell is the flags, encoded as the trigger masks from binding document

80 chars

<snip>

+Optional properties:
+-------------------
+The input supply of regulators are the optional properties on the
+regulator node. The input supply of these regulators are provided
+through following properties:
+vsup-sd2-supply: Input supply for SD2.
+vsup-sd3-supply: Input supply for SD3.
+vsup-sd4-supply: Input supply for SD4.
+vsup-sd5-supply: Input supply for SD5.
+vin-ldo0-supply: Input supply for LDO0.
+vin-ldo1-6-supply: Input supply for LDO1 and LDO6.
+vin-ldo2-5-7-supply: Input supply for LDO2, LDO5 and LDO7.
+vin-ldo3-4-supply: Input supply for LDO3 and LDO4.
+vin-ldo9-10-supply: Input supply for LDO9 and LDO10.
+vin-ldo11-supply: Input supply for LDO11.

Perhaps some indentation would be good here.

+Optional sub nodes:
+-----------------
+	The subnodes name is the name of regulator and it must be one of:
+	sd[0-6], ldo[0-7], ldo[9-11]
+
+	Each sub-node should contain the constraints and initialization
+	information for that regulator. See regulator.txt for a description
+	of standard properties for these sub-nodes.
+	Additional custom properties  are listed below.

Silly nit: Attention to detail 'properties..are'.

<snip>

Besides all that stuff that's actually not all that important, the
code looks pretty good to me.

For the !DT MFD stuff:

Acked-by: Lee Jones <redacted>

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