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Message-ID: <20121129092308.GT2013@gmail.com>
Date: Thu, 29 Nov 2012 09:23:08 +0000
From: Lee Jones <lee.jones@...aro.org>
To: Viresh Kumar <viresh.kumar@...aro.org>
Cc: sameo@...ux.intel.com, grant.likely@...retlab.ca,
rabin.vincent@...ricsson.com, shiraz.hashim@...com,
devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
spear-devel@...t.st.com, linus.walleij@...aro.org,
Vipul Kumar Samar <vipulkumar.samar@...com>
Subject: Re: [PATCH V4 Resend 3/3] mfd: stmpe: Update DT support in stmpe
driver
On Thu, 29 Nov 2012, Viresh Kumar wrote:
> From: Vipul Kumar Samar <vipulkumar.samar@...com>
>
> This patch extends existing DT support for stmpe devices. This updates:
> - DT support from stmpe SPI and I2C drivers
> - missing header files in stmpe.c
> - stmpe_of_probe() with pwm, rotator and new bindings.
> - Bindings are updated in binding document.
>
> Signed-off-by: Vipul Kumar Samar <vipulkumar.samar@...com>
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
> ---
> V3->V4:
> - Remove need to pass irq type and polarity from DT.
> - Remove need to pass id from platform data.
>
> Documentation/devicetree/bindings/mfd/stmpe.txt | 9 ++++++---
> drivers/mfd/stmpe-i2c.c | 15 +++++++++++++++
> drivers/mfd/stmpe-spi.c | 15 +++++++++++++++
> drivers/mfd/stmpe.c | 22 ++++++++++++++++------
> 4 files changed, 52 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,
> +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-i2c.c b/drivers/mfd/stmpe-i2c.c
> index c734dc3..003c49b 100644
> --- a/drivers/mfd/stmpe-i2c.c
> +++ b/drivers/mfd/stmpe-i2c.c
> @@ -13,6 +13,7 @@
> #include <linux/interrupt.h>
> #include <linux/kernel.h>
> #include <linux/module.h>
> +#include <linux/of.h>
> #include <linux/types.h>
> #include "stmpe.h"
>
> @@ -81,6 +82,19 @@ static const struct i2c_device_id stmpe_i2c_id[] = {
> };
> MODULE_DEVICE_TABLE(i2c, stmpe_id);
>
> +#ifdef CONFIG_OF
> +static const struct of_device_id stmpe_dt_ids[] = {
> + { .compatible = "st,stmpe610", .data = &stmpe_i2c_id[0], },
> + { .compatible = "st,stmpe801", .data = &stmpe_i2c_id[1], },
> + { .compatible = "st,stmpe811", .data = &stmpe_i2c_id[2], },
> + { .compatible = "st,stmpe1601", .data = &stmpe_i2c_id[3], },
> + { .compatible = "st,stmpe2401", .data = &stmpe_i2c_id[4], },
> + { .compatible = "st,stmpe2403", .data = &stmpe_i2c_id[5], },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, stmpe_dt_ids);
> +#endif
> +
> static struct i2c_driver stmpe_i2c_driver = {
> .driver = {
> .name = "stmpe-i2c",
> @@ -88,6 +102,7 @@ static struct i2c_driver stmpe_i2c_driver = {
> #ifdef CONFIG_PM
> .pm = &stmpe_dev_pm_ops,
> #endif
> + .of_match_table = of_match_ptr(stmpe_dt_ids),
> },
> .probe = stmpe_i2c_probe,
> .remove = __devexit_p(stmpe_i2c_remove),
> diff --git a/drivers/mfd/stmpe-spi.c b/drivers/mfd/stmpe-spi.c
> index 9edfe86..1e2bff0 100644
> --- a/drivers/mfd/stmpe-spi.c
> +++ b/drivers/mfd/stmpe-spi.c
> @@ -11,6 +11,7 @@
> #include <linux/interrupt.h>
> #include <linux/kernel.h>
> #include <linux/module.h>
> +#include <linux/of.h>
> #include <linux/types.h>
> #include "stmpe.h"
>
> @@ -119,6 +120,19 @@ static const struct spi_device_id stmpe_spi_id[] = {
> };
> MODULE_DEVICE_TABLE(spi, stmpe_id);
>
> +#ifdef CONFIG_OF
> +static const struct of_device_id stmpe_dt_ids[] = {
> + { .compatible = "st,stmpe610", .data = (void *)STMPE610, },
> + { .compatible = "st,stmpe801", .data = (void *)STMPE801, },
> + { .compatible = "st,stmpe811", .data = (void *)STMPE811, },
> + { .compatible = "st,stmpe1601", .data = (void *)STMPE1601, },
> + { .compatible = "st,stmpe2401", .data = (void *)STMPE2401, },
> + { .compatible = "st,stmpe2403", .data = (void *)STMPE2403, },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, stmpe_dt_ids);
> +#endif
> +
> static struct spi_driver stmpe_spi_driver = {
> .driver = {
> .name = "stmpe-spi",
> @@ -126,6 +140,7 @@ static struct spi_driver stmpe_spi_driver = {
> #ifdef CONFIG_PM
> .pm = &stmpe_dev_pm_ops,
> #endif
> + .of_match_table = of_match_ptr(stmpe_dt_ids),
> },
> .probe = stmpe_spi_probe,
> .remove = __devexit_p(stmpe_spi_remove),
> diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
> index 10819e6..88cd8e5 100644
> --- a/drivers/mfd/stmpe.c
> +++ b/drivers/mfd/stmpe.c
> @@ -7,12 +7,15 @@
> * Author: Rabin Vincent <rabin.vincent@...ricsson.com> 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>
> @@ -1021,6 +1024,12 @@ 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.
> + */
> + pdata->id = -1;
And what if we're not booting with DT?
> of_property_read_u32(np, "st,autosleep-timeout",
> &pdata->autosleep_timeout);
>
> @@ -1029,15 +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;
> }
> }
> }
> --
> 1.7.12.rc2.18.g61b472e
>
--
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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