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Subject[PATCH 6/6] gpio: OpenFirmware bindings for the pca953x
Unfortunately we have to duplicate compatibles list, since
MODULE_DEVICE_TABLE() doesn't work with the extern symbols. :-(

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
---
drivers/gpio/Kconfig | 7 ++
drivers/gpio/Makefile | 1 +
drivers/gpio/of_pca953x.c | 134 +++++++++++++++++++++++++++++++++++++++++++++
drivers/of/base.c | 21 +++++++
4 files changed, 163 insertions(+), 0 deletions(-)
create mode 100644 drivers/gpio/of_pca953x.c
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 7f2ee27..d5a9e2c 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -103,6 +103,13 @@ config GPIO_PCA953X
This driver can also be built as a module. If so, the module
will be called pca953x.

+config GPIO_OF_PCA953X
+ tristate "OpenFirmware Bindings for PCA953x, PCA955x, and MAX7310"
+ depends on GPIO_PCA953X
+ help
+ Say yes here to enable OpenFirmware bindings for PCA953x, PCA955x,
+ and MAX7310 I/O ports.
+
config GPIO_PCF857X
tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
depends on I2C
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 6aafdeb..b6edf33 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_GPIO_MAX7301) += max7301.o
obj-$(CONFIG_GPIO_MAX732X) += max732x.o
obj-$(CONFIG_GPIO_MCP23S08) += mcp23s08.o
obj-$(CONFIG_GPIO_PCA953X) += pca953x.o
+obj-$(CONFIG_GPIO_OF_PCA953X) += of_pca953x.o
obj-$(CONFIG_GPIO_PCF857X) += pcf857x.o
obj-$(CONFIG_GPIO_TWL4030) += twl4030-gpio.o
obj-$(CONFIG_GPIO_BT8XX) += bt8xxgpio.o
diff --git a/drivers/gpio/of_pca953x.c b/drivers/gpio/of_pca953x.c
new file mode 100644
index 0000000..6884776
--- /dev/null
+++ b/drivers/gpio/of_pca953x.c
@@ -0,0 +1,134 @@
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/of.h>
+#include <linux/of_i2c.h>
+#include <linux/of_gpio.h>
+#include <linux/of_platform.h>
+#include <linux/i2c/pca953x.h>
+
+struct of_pca953x {
+ struct device_node *node;
+ struct pca953x_platform_data pdata;
+ struct i2c_client *client;
+};
+
+static int of_pca953x_setup(struct i2c_client *client, struct gpio_chip *chip,
+ void *context)
+{
+ struct of_pca953x *of_pca = context;
+ struct of_gpio_chip *of_gc;
+
+ of_gc = kzalloc(sizeof(*of_gc), GFP_KERNEL);
+ if (!of_gc)
+ return -ENOMEM;
+
+ of_gc->gpio_cells = 2;
+ of_gc->xlate = of_gpio_simple_xlate;
+
+ of_gc->chip = chip;
+ of_pca->node->data = of_gc;
+
+ return 0;
+}
+
+static int of_pca953x_teardown(struct i2c_client *client,
+ struct gpio_chip *chip,
+ void *context)
+{
+ struct of_pca953x *of_pca = context;
+ struct of_gpio_chip *of_gc = of_pca->node->data;
+
+ of_pca->node->data = NULL;
+ kfree(of_gc);
+ return 0;
+}
+
+static int __devinit of_pca953x_platform_probe(struct of_device *ofdev,
+ const struct of_device_id *match)
+{
+ struct device *dev = &ofdev->dev;
+ struct device *adap_dev = dev->parent;
+ struct i2c_adapter *adap = to_i2c_adapter(adap_dev);
+ struct device_node *node = ofdev->node;
+ struct i2c_board_info info = {};
+ struct of_pca953x *of_pca;
+ int ret;
+
+ of_pca = kzalloc(sizeof(*of_pca), GFP_KERNEL);
+ if (!of_pca)
+ return -ENOMEM;
+
+ of_pca->node = node;
+ of_pca->pdata.gpio_base = -1;
+ of_pca->pdata.context = of_pca;
+ of_pca->pdata.setup = of_pca953x_setup;
+ of_pca->pdata.teardown = of_pca953x_teardown;
+ info.platform_data = &of_pca->pdata;
+
+ of_pca->client = of_register_i2c_device(adap, &info, node);
+ if (!of_pca->client) {
+ ret = -EINVAL;
+ goto err;
+ }
+
+ dev_set_drvdata(dev, of_pca);
+ return 0;
+err:
+ kfree(of_pca);
+ return ret;
+}
+
+static int __devexit of_pca953x_platform_remove(struct of_device *ofdev)
+{
+ struct of_pca953x *of_pca = dev_get_drvdata(&ofdev->dev);
+
+ of_unregister_i2c_device(of_pca->client);
+ return 0;
+}
+
+static const struct of_device_id of_pca953x_ids[] = {
+ { "nxp,pca9534" },
+ { "nxp,pca9535" },
+ { "nxp,pca9536" },
+ { "nxp,pca9537" },
+ { "nxp,pca9538" },
+ { "nxp,pca9539" },
+ { "nxp,pca9554" },
+ { "nxp,pca9555" },
+ { "nxp,pca9557" },
+ { "ti,pca9534" },
+ { "ti,pca9535" },
+ { "ti,pca9536" },
+ { "ti,pca9537" },
+ { "ti,pca9538" },
+ { "ti,pca9539" },
+ { "ti,pca9554" },
+ { "ti,pca9555" },
+ { "ti,pca9557" },
+ { "maxim,max7310" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_pca953x_ids);
+
+static struct of_platform_driver of_pca953x_platform_driver = {
+ .name = "of_pca953x_platform",
+ .match_table = of_pca953x_ids,
+ .probe = of_pca953x_platform_probe,
+ .remove = __devexit_p(of_pca953x_platform_remove),
+};
+
+static int __init of_pca953x_platform_init(void)
+{
+ return of_register_platform_driver(&of_pca953x_platform_driver);
+}
+module_init(of_pca953x_platform_init);
+
+static void __exit of_pca953x_platform_exit(void)
+{
+ of_unregister_platform_driver(&of_pca953x_platform_driver);
+}
+module_exit(of_pca953x_platform_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 1baeee3..f828792 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -464,6 +464,27 @@ EXPORT_SYMBOL_GPL(of_modalias_node);
* devices.
*/
static const char *of_pdev_list[] = {
+#if defined(CONFIG_GPIO_OF_PCA953X) || defined(CONFIG_GPIO_OF_PCA953X_MODULE)
+ "nxp,pca9534",
+ "nxp,pca9535",
+ "nxp,pca9536",
+ "nxp,pca9537",
+ "nxp,pca9538",
+ "nxp,pca9539",
+ "nxp,pca9554",
+ "nxp,pca9555",
+ "nxp,pca9557",
+ "ti,pca9534",
+ "ti,pca9535",
+ "ti,pca9536",
+ "ti,pca9537",
+ "ti,pca9538",
+ "ti,pca9539",
+ "ti,pca9554",
+ "ti,pca9555",
+ "ti,pca9557",
+ "maxim,max7310",
+#endif
};

/**
--
1.5.6.3

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