Re: [PATCH V3 3/3] mfd: stmpe: Update DT support in stmpe driver

[Lee Jones <lee.jones@linaro.org>]

On Fri, 23 Nov 2012, Viresh Kumar wrote:

> From: Vipul Kumar Samar <vipulkumar.samar@st.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@st.com>
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
> ---
> V2->V3:
> ------
> - Removed sub-modules DT bindings from this patch
> - Retain original work done by Lee Jones
> 
>  Documentation/devicetree/bindings/mfd/stmpe.txt | 12 ++++++++----
>  drivers/mfd/stmpe-i2c.c                         | 15 +++++++++++++++
>  drivers/mfd/stmpe-spi.c                         | 15 +++++++++++++++
>  drivers/mfd/stmpe.c                             | 21 +++++++++++++++------
>  4 files changed, 53 insertions(+), 10 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/stmpe.txt b/Documentation/devicetree/bindings/mfd/stmpe.txt
> index 8f0aeda..8f65c8d 100644
> --- a/Documentation/devicetree/bindings/mfd/stmpe.txt
> +++ b/Documentation/devicetree/bindings/mfd/stmpe.txt
> @@ -1,13 +1,17 @@
> -* 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
> - - interrupt-controller         : Marks the device node as an interrupt controller

On closer inspection, this is actually incorrect.

The STMPE _is_ an interrupt-controller.

>   - interrupt-parent             : Specifies which IRQ controller we're connected to
> + - irq-trigger			: IRQ trigger to use for the interrupt to the host
> + - irq-invert-polarity		: bool, IRQ line is connected with reversed polarity

I've told you about this already. ;)

>   - i2c-client-wake              : Marks the input device as wakable
>   - st,autosleep-timeout         : Valid entries (ms); 4, 16, 32, 64, 128, 256, 512 and 1024
>  
> 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 f86e3fc..e482f5f 100644
> --- a/drivers/mfd/stmpe-spi.c
> +++ b/drivers/mfd/stmpe-spi.c
> @@ -10,6 +10,7 @@
>  #include <linux/interrupt.h>
>  #include <linux/kernel.h>
>  #include <linux/module.h>
> +#include <linux/of.h>
>  #include <linux/spi/spi.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 6086481..e2c0dda 100644
> --- a/drivers/mfd/stmpe.c
> +++ b/drivers/mfd/stmpe.c
> @@ -7,6 +7,7 @@
>   * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
>   */
>  
> +#include <linux/err.h>
>  #include <linux/export.h>
>  #include <linux/gpio.h>
>  #include <linux/interrupt.h>
> @@ -14,6 +15,8 @@
>  #include <linux/irqdomain.h>
>  #include <linux/kernel.h>
>  #include <linux/mfd/core.h>
> +#include <linux/of.h>
> +#include <linux/of_gpio.h>
>  #include <linux/pm.h>
>  #include <linux/slab.h>
>  #include "stmpe.h"
> @@ -1028,18 +1031,24 @@ void __devinit stmpe_of_probe(struct stmpe_platform_data *pdata,
>  
>  	pdata->autosleep = (pdata->autosleep_timeout) ? true : false;
>  
> +	of_property_read_u32(np, "irq-trigger", &pdata->irq_trigger);
> +
> +	if (of_property_read_bool(np, "irq-invert-polarity"))
> +		pdata->irq_invert_polarity = true;
> +

You don't need these.

>  	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
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