[PATCH] input: touchscreen: add OF match table for ads7846

The current ads7846 has no OF match table. The method used is by applying a heuristic (of_modalias_node) which tries to name the device in a way that will match an existing device driver.
This patch adds explicit OF match table for ads7846, then the normal device tree match behaviour will always work.
It has been tested on PRIMA2 EVB board of CSR with a SPI's child node like the below:
ts@0 {
	compatible = "ti,ads7845";
	reg = <0x0>;
	spi-max-frequency = <31250>;
        interrupts = <90>;
};

Signed-off-by: Barry Song <redacted>
Cc: Grant Likely <redacted>
cc: Thomas Chou <redacted>
---
 drivers/input/touchscreen/ads7846.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 5196861..643138b 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c

@@ -28,6 +28,7 @@
 #include <linux/slab.h>
 #include <linux/pm.h>
 #include <linux/gpio.h>
+#include <linux/of.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/ads7846.h>
 #include <linux/regulator/consumer.h>

@@ -1425,12 +1426,25 @@ static int __devexit ads7846_remove(struct spi_device *spi)
 	return 0;
 }
 
+#if defined(CONFIG_OF)
+static struct of_device_id ads7846_spi_of_match_table[] __devinitdata = {
+	{ .compatible = "ti,ads7846", },
+	{ .compatible = "ti,ads7845", },
+	{ .compatible = "ti,ads7843", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, ads7846_spi_of_match_table);
+#endif
+
 static struct spi_driver ads7846_driver = {
 	.driver = {
 		.name	= "ads7846",
 		.bus	= &spi_bus_type,
 		.owner	= THIS_MODULE,
 		.pm	= &ads7846_pm,
+#if defined(CONFIG_OF)
+		.of_match_table = ads7846_spi_of_match_table,
+#endif
 	},
 	.probe		= ads7846_probe,
 	.remove		= __devexit_p(ads7846_remove),

-- 
1.7.1



Member of the CSR plc group of companies. CSR plc registered in England and Wales, registered number 4187346, registered office Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, United Kingdom
More information can be found at www.csr.com. Follow CSR on Twitter at http://twitter.com/CSR_PLC and read our blog at www.csr.com/blog

On Thu, Jun 9, 2011 at 8:28 PM, Barry Song [off-list ref] wrote:

The current ads7846 has no OF match table. The method used is by applying a heuristic (of_modalias_node) which tries to name the device in a way that will match an existing device driver.
This patch adds explicit OF match table for ads7846, then the normal device tree match behaviour will always work.
It has been tested on PRIMA2 EVB board of CSR with a SPI's child node like the below:
ts@0 {
       compatible = "ti,ads7845";
       reg = <0x0>;
       spi-max-frequency = <31250>;
       interrupts = <90>;
};

Signed-off-by: Barry Song <redacted>
Cc: Grant Likely <redacted>
cc: Thomas Chou <redacted>
---
 drivers/input/touchscreen/ads7846.c |   14 ++++++++++++++

There should also be documentation for the new binding added to
Documentation/devicetree/bindings for the new compatible strings.

#else
#define ads7846_spi_of_match_table NULL

+#endif
+
 static struct spi_driver ads7846_driver = {
       .driver = {
               .name   = "ads7846",
               .bus    = &spi_bus_type,
               .owner  = THIS_MODULE,
               .pm     = &ads7846_pm,
+#if defined(CONFIG_OF)
+               .of_match_table = ads7846_spi_of_match_table,
+#endif

With the #else  block added above, you can drop the #if/#endif
protection around of_match_table.

Otherwise:

Acked-by: Grant Likely <redacted>
--
To unsubscribe from this list: send the line "unsubscribe linux-input" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Hi Grant,
Thanks.

2011/6/13 Grant Likely [off-list ref]:

On Thu, Jun 9, 2011 at 8:28 PM, Barry Song [off-list ref] wrote:

quoted

The current ads7846 has no OF match table. The method used is by applying a heuristic (of_modalias_node) which tries to name the device in a way that will match an existing device driver.
This patch adds explicit OF match table for ads7846, then the normal device tree match behaviour will always work.
It has been tested on PRIMA2 EVB board of CSR with a SPI's child node like the below:
ts@0 {
       compatible = "ti,ads7845";
       reg = <0x0>;
       spi-max-frequency = <31250>;
       interrupts = <90>;
};

Signed-off-by: Barry Song <redacted>
Cc: Grant Likely <redacted>
cc: Thomas Chou <redacted>
---
 drivers/input/touchscreen/ads7846.c |   14 ++++++++++++++

There should also be documentation for the new binding added to
Documentation/devicetree/bindings for the new compatible strings.

Which directory do you think is the best to place this document? or do
we build a new diretory named
Documentation/devicetree/bindings/input/touchscreen/ ?
The dir Documentation/devicetree/bindings seems to be for spi host,
not for spi clients.

quoted

 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 5196861..643138b 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c

@@ -28,6 +28,7 @@

 #include <linux/slab.h>
 #include <linux/pm.h>
 #include <linux/gpio.h>
+#include <linux/of.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/ads7846.h>
 #include <linux/regulator/consumer.h>

@@ -1425,12 +1426,25 @@ static int __devexit ads7846_remove(struct spi_device *spi)

       return 0;
 }

+#if defined(CONFIG_OF)
+static struct of_device_id ads7846_spi_of_match_table[] __devinitdata = {
+       { .compatible = "ti,ads7846", },
+       { .compatible = "ti,ads7845", },
+       { .compatible = "ti,ads7843", },
+       {},
+};
+MODULE_DEVICE_TABLE(of, ads7846_spi_of_match_table);

#else
#define ads7846_spi_of_match_table NULL

quoted

+#endif
+
 static struct spi_driver ads7846_driver = {
       .driver = {
               .name   = "ads7846",
               .bus    = &spi_bus_type,
               .owner  = THIS_MODULE,
               .pm     = &ads7846_pm,
+#if defined(CONFIG_OF)
+               .of_match_table = ads7846_spi_of_match_table,
+#endif

With the #else  block added above, you can drop the #if/#endif
protection around of_match_table.

ok. thanks

Otherwise:

Acked-by: Grant Likely <redacted>

--
To unsubscribe from this list: send the line "unsubscribe linux-input" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

On Mon, Jun 13, 2011 at 2:15 AM, Barry Song [off-list ref] wrote:

Hi Grant,
Thanks.

2011/6/13 Grant Likely [off-list ref]:

quoted

On Thu, Jun 9, 2011 at 8:28 PM, Barry Song [off-list ref] wrote:

quoted

The current ads7846 has no OF match table. The method used is by applying a heuristic (of_modalias_node) which tries to name the device in a way that will match an existing device driver.
This patch adds explicit OF match table for ads7846, then the normal device tree match behaviour will always work.
It has been tested on PRIMA2 EVB board of CSR with a SPI's child node like the below:
ts@0 {
       compatible = "ti,ads7845";
       reg = <0x0>;
       spi-max-frequency = <31250>;
       interrupts = <90>;
};

Signed-off-by: Barry Song <redacted>
Cc: Grant Likely <redacted>
cc: Thomas Chou <redacted>
---
 drivers/input/touchscreen/ads7846.c |   14 ++++++++++++++

There should also be documentation for the new binding added to
Documentation/devicetree/bindings for the new compatible strings.

Which directory do you think is the best to place this document? or do
we build a new diretory named
Documentation/devicetree/bindings/input/touchscreen/ ?
The dir Documentation/devicetree/bindings seems to be for spi host,
not for spi clients.

Documentation/devicetree/bindings/input sounds appropriate.

g.
--
To unsubscribe from this list: send the line "unsubscribe linux-input" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html