Add of_device_id table for Palma GPIO to be enable the
driver from DT file.
The driver can be registered from DT file as:
palmas: tps65913@58 {
:::::::::::
palmas_gpio: palmas_gpio {
compatible = "ti,palmas-gpio";
gpio-controller;
#gpio-cells = <2>;
};
};
Signed-off-by: Laxman Dewangan <[email protected]>
---
Long back, I sent the similar patch but it was paused due to the DT binding.
http://lkml.indiana.edu/hypermail/linux/kernel/1304.2/00261.html
Now, PMIC DT binding is already finalised and as per mfd binding, we can
go ahead with similar approach for gpios. pmic and other palams sub devices
are already following the same approach.
Sending 3rd version of the change which is same as per code is related but
adding devicetree binding document for gpio also at this time.
Changes from V3:
- Added description in DT binding document for second arg of gpio cells.
.../devicetree/bindings/gpio/gpio-palmas.txt | 27 ++++++++++++++++++++
drivers/gpio/gpio-palmas.c | 12 ++++++++-
2 files changed, 38 insertions(+), 1 deletions(-)
create mode 100644 Documentation/devicetree/bindings/gpio/gpio-palmas.txt
diff --git a/Documentation/devicetree/bindings/gpio/gpio-palmas.txt b/Documentation/devicetree/bindings/gpio/gpio-palmas.txt
new file mode 100644
index 0000000..08b5b52
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-palmas.txt
@@ -0,0 +1,27 @@
+Palmas GPIO controller bindings
+
+Required properties:
+- compatible:
+ - "ti,palams-gpio" for palma series of the GPIO controller
+ - "ti,tps80036-gpio" for Palma series device TPS80036.
+ - "ti,tps65913-gpio" for palma series device TPS65913.
+ - "ti,tps65914-gpio" for palma series device TPS65914.
+- #gpio-cells : Should be two.
+ - first cell is the gpio pin number
+ - second cell is used to specify the gpio polarity:
+ 0 = active high
+ 1 = active low
+- gpio-controller : Marks the device node as a GPIO controller.
+
+Note: This gpio node will be sub node of palmas node.
+
+Example:
+ palmas: tps65913@58 {
+ :::::::::::
+ palmas_gpio: palmas_gpio {
+ compatible = "ti,palmas-gpio";
+ gpio-controller;
+ #gpio-cells = <2>;
+ };
+ :::::::::::
+ };
diff --git a/drivers/gpio/gpio-palmas.c b/drivers/gpio/gpio-palmas.c
index e3a4e56..09360c4 100644
--- a/drivers/gpio/gpio-palmas.c
+++ b/drivers/gpio/gpio-palmas.c
@@ -134,7 +134,7 @@ static int palmas_gpio_probe(struct platform_device *pdev)
palmas_gpio->gpio_chip.get = palmas_gpio_get;
palmas_gpio->gpio_chip.dev = &pdev->dev;
#ifdef CONFIG_OF_GPIO
- palmas_gpio->gpio_chip.of_node = palmas->dev->of_node;
+ palmas_gpio->gpio_chip.of_node = pdev->dev.of_node;
#endif
palmas_pdata = dev_get_platdata(palmas->dev);
if (palmas_pdata && palmas_pdata->gpio_base)
@@ -159,9 +159,19 @@ static int palmas_gpio_remove(struct platform_device *pdev)
return gpiochip_remove(&palmas_gpio->gpio_chip);
}
+static struct of_device_id of_palmas_gpio_match[] = {
+ { .compatible = "ti,palmas-gpio"},
+ { .compatible = "ti,tps65913-gpio"},
+ { .compatible = "ti,tps65914-gpio"},
+ { .compatible = "ti,tps80036-gpio"},
+ { },
+};
+MODULE_DEVICE_TABLE(of, of_palmas_gpio_match);
+
static struct platform_driver palmas_gpio_driver = {
.driver.name = "palmas-gpio",
.driver.owner = THIS_MODULE,
+ .driver.of_match_table = of_palmas_gpio_match,
.probe = palmas_gpio_probe,
.remove = palmas_gpio_remove,
};
--
1.7.1.1
On 07/23/2013 12:36 AM, Laxman Dewangan wrote:
> Add of_device_id table for Palma GPIO to be enable the
> driver from DT file.
>
> The driver can be registered from DT file as:
> palmas: tps65913@58 {
> :::::::::::
> palmas_gpio: palmas_gpio {
> compatible = "ti,palmas-gpio";
> gpio-controller;
> #gpio-cells = <2>;
> };
> };
The binding at least,
Acked-by: Stephen Warren <[email protected]>
> diff --git a/drivers/gpio/gpio-palmas.c b/drivers/gpio/gpio-palmas.c
> #ifdef CONFIG_OF_GPIO
> - palmas_gpio->gpio_chip.of_node = palmas->dev->of_node;
> + palmas_gpio->gpio_chip.of_node = pdev->dev.of_node;
> #endif
That still scares me slightly, in case someone is already using this
driver and this changes how it works, and it breaks something, but I
don't think anyone is, so this should be OK too.
On Tue, Jul 23, 2013 at 9:36 AM, Laxman Dewangan <[email protected]> wrote:
> Add of_device_id table for Palma GPIO to be enable the
> driver from DT file.
>
> The driver can be registered from DT file as:
> palmas: tps65913@58 {
> :::::::::::
> palmas_gpio: palmas_gpio {
> compatible = "ti,palmas-gpio";
> gpio-controller;
> #gpio-cells = <2>;
> };
> };
>
> Signed-off-by: Laxman Dewangan <[email protected]>
> ---
> Long back, I sent the similar patch but it was paused due to the DT binding.
> http://lkml.indiana.edu/hypermail/linux/kernel/1304.2/00261.html
>
> Now, PMIC DT binding is already finalised and as per mfd binding, we can
> go ahead with similar approach for gpios. pmic and other palams sub devices
> are already following the same approach.
>
> Sending 3rd version of the change which is same as per code is related but
> adding devicetree binding document for gpio also at this time.
>
> Changes from V3:
> - Added description in DT binding document for second arg of gpio cells.
Patch applied with Stephen's ACK.
Yours,
Linus Walleij