Re: [PATCH V6] mfd: stmpe: Update DT support for stmpe driver

From: Lee Jones
Date: Thu Dec 06 2012 - 11:40:52 EST


On Thu, 06 Dec 2012, Viresh Kumar wrote:

> From: Vipul Kumar Samar <vipulkumar.samar@xxxxxx>
>
> This patch extends existing DT support for stmpe devices. This updates:
> - missing header files in stmpe.c
> - stmpe_of_probe() with pwm, rotator and new bindings.
> - Bindings are updated in binding document.
>
> Acked-by: Lee Jones <lee.jones@xxxxxxxxxx>
> Signed-off-by: Vipul Kumar Samar <vipulkumar.samar@xxxxxx>
> Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
> ---
> Hi Samuel,
>
> I have added acked by Lee as he earlier Acked this patch, most of the part is
> still the same. And nothing new added.
>
> V5->V6:
> - Removed of_devide_id tables from stmpe-i2c[spi].c
>
> Documentation/devicetree/bindings/mfd/stmpe.txt | 9 ++++++---
> drivers/mfd/stmpe.c | 27 +++++++++++++++++++------
> 2 files changed, 27 insertions(+), 9 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/mfd/stmpe.txt b/Documentation/devicetree/bindings/mfd/stmpe.txt
> index 8f0aeda..d2d88d9 100644
> --- a/Documentation/devicetree/bindings/mfd/stmpe.txt
> +++ b/Documentation/devicetree/bindings/mfd/stmpe.txt
> @@ -1,8 +1,11 @@
> -* STMPE Multi-Functional Device
> +* ST Microelectronics STMPE Multi-Functional Device
> +
> +STMPE is an MFD device which may expose following inbuilt devices: gpio, keypad,

^ the

> +touchscreen, adc, pwm, rotator.
>
> Required properties:
> - - compatible : "st,stmpe[811|1601|2401|2403]"
> - - reg : I2C address of the device
> + - compatible : "st,stmpe[610|801|811|1601|2401|2403]"
> + - reg : I2C/SPI address of the device
>
> Optional properties:
> - interrupts : The interrupt outputs from the controller
> diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
> index 34408b4..bb2dfdb 100644
> --- a/drivers/mfd/stmpe.c
> +++ b/drivers/mfd/stmpe.c
> @@ -7,12 +7,15 @@
> * Author: Rabin Vincent <rabin.vincent@xxxxxxxxxxxxxx> for ST-Ericsson
> */
>
> +#include <linux/err.h>
> #include <linux/gpio.h>
> #include <linux/export.h>
> #include <linux/kernel.h>
> #include <linux/interrupt.h>
> #include <linux/irq.h>
> #include <linux/irqdomain.h>
> +#include <linux/of.h>
> +#include <linux/of_gpio.h>
> #include <linux/pm.h>
> #include <linux/slab.h>
> #include <linux/mfd/core.h>
> @@ -1019,6 +1022,14 @@ void __devinit stmpe_of_probe(struct stmpe_platform_data *pdata,
> {
> struct device_node *child;
>
> + /*
> + * Distinct names of same cell-type within multiple instances of stmpe
> + * will be guaranteed by DT.
> + */

I think the comment is unnecessary.

> + pdata->id = -1;

Perhaps PLATFORM_DEVID_AUTO would be better?

> + pdata->irq_trigger = IRQF_TRIGGER_NONE;
> +

There's no need for this. It's guaranteed to be zero by:

pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);

> of_property_read_u32(np, "st,autosleep-timeout",
> &pdata->autosleep_timeout);
>
> @@ -1027,15 +1038,16 @@ void __devinit stmpe_of_probe(struct stmpe_platform_data *pdata,
> for_each_child_of_node(np, child) {
> if (!strcmp(child->name, "stmpe_gpio")) {
> pdata->blocks |= STMPE_BLOCK_GPIO;
> - }
> - if (!strcmp(child->name, "stmpe_keypad")) {
> + } else if (!strcmp(child->name, "stmpe_keypad")) {
> pdata->blocks |= STMPE_BLOCK_KEYPAD;
> - }
> - if (!strcmp(child->name, "stmpe_touchscreen")) {
> + } else if (!strcmp(child->name, "stmpe_touchscreen")) {
> pdata->blocks |= STMPE_BLOCK_TOUCHSCREEN;
> - }
> - if (!strcmp(child->name, "stmpe_adc")) {
> + } else if (!strcmp(child->name, "stmpe_adc")) {
> pdata->blocks |= STMPE_BLOCK_ADC;
> + } else if (!strcmp(child->name, "stmpe_pwm")) {
> + pdata->blocks |= STMPE_BLOCK_PWM;
> + } else if (!strcmp(child->name, "stmpe_rotator")) {
> + pdata->blocks |= STMPE_BLOCK_ROTATOR;
> }
> }
> }
> @@ -1106,6 +1118,9 @@ int __devinit stmpe_probe(struct stmpe_client_info *ci, int partnum)
> return -ENODEV;
> }
> stmpe->variant = stmpe_noirq_variant_info[stmpe->partnum];
> + } else if (pdata->irq_trigger == IRQF_TRIGGER_NONE) {
> + pdata->irq_trigger =
> + irqd_get_trigger_type(irq_get_irq_data(stmpe->irq));
> }
>
> ret = stmpe_chip_init(stmpe);
> --
> 1.7.12.rc2.18.g61b472e
>

--
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org â Open source software for ARM SoCs
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