diff options
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-sx150x.txt | 40 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/vendor-prefixes.txt | 1 | ||||
| -rw-r--r-- | drivers/gpio/gpio-sx150x.c | 17 |
3 files changed, 57 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt b/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt new file mode 100644 index 0000000..ba2bb84 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt @@ -0,0 +1,40 @@ +SEMTECH SX150x GPIO expander bindings + + +Required properties: + +- compatible: should be "semtech,sx1506q", + "semtech,sx1508q", + "semtech,sx1509q". + +- reg: The I2C slave address for this device. + +- interrupt-parent: phandle of the parent interrupt controller. + +- interrupts: Interrupt specifier for the controllers interrupt. + +- #gpio-cells: Should be 2. The first cell is the GPIO number and the + second cell is used to specify optional parameters: + bit 0: polarity (0: normal, 1: inverted) + +- gpio-controller: Marks the device as a GPIO controller. + +- interrupt-controller: Marks the device as a interrupt controller. + +The GPIO expander can optionally be used as an interrupt controller, in +which case it uses the default two cell specifier as described in +Documentation/devicetree/bindings/interrupt-controller/interrupts.txt. + +Example: + + i2c_gpio_expander@20{ + #gpio-cells = <2>; + #interrupt-cells = <2>; + compatible = "semtech,sx1506q"; + reg = <0x20>; + interrupt-parent = <&gpio_1>; + interrupts = <16 0>; + + gpio-controller; + interrupt-controller; + }; diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index b1df0ad..ce751cb 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -141,6 +141,7 @@ sandisk Sandisk Corporation sbs Smart Battery System schindler Schindler seagate Seagate Technology PLC +semtech Semtech Corporation sil Silicon Image silabs Silicon Laboratories simtek diff --git a/drivers/gpio/gpio-sx150x.c b/drivers/gpio/gpio-sx150x.c index 20573ac..88012e2 100644 --- a/drivers/gpio/gpio-sx150x.c +++ b/drivers/gpio/gpio-sx150x.c @@ -23,6 +23,11 @@ #include <linux/mutex.h> #include <linux/slab.h> #include <linux/i2c/sx150x.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/of_gpio.h> +#include <linux/of_device.h> #define NO_UPDATE_PENDING -1 @@ -147,6 +152,13 @@ static const struct i2c_device_id sx150x_id[] = { }; MODULE_DEVICE_TABLE(i2c, sx150x_id); +static const struct of_device_id sx150x_dt_id[] = { + { .compatible = "semtech,sx1508q" }, + { .compatible = "semtech,sx1509q" }, + { .compatible = "semtech,sx1506q" }, + {}, +}; + static s32 sx150x_i2c_write(struct i2c_client *client, u8 reg, u8 val) { s32 err = i2c_smbus_write_byte_data(client, reg, val); @@ -472,6 +484,8 @@ static void sx150x_init_chip(struct sx150x_chip *chip, chip->gpio_chip.base = pdata->gpio_base; chip->gpio_chip.can_sleep = true; chip->gpio_chip.ngpio = chip->dev_cfg->ngpios; + chip->gpio_chip.of_node = client->dev.of_node; + chip->gpio_chip.of_gpio_n_cells = 2; if (pdata->oscio_is_gpo) ++chip->gpio_chip.ngpio; @@ -666,7 +680,8 @@ static int sx150x_remove(struct i2c_client *client) static struct i2c_driver sx150x_driver = { .driver = { .name = "sx150x", - .owner = THIS_MODULE + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(sx150x_dt_id), }, .probe = sx150x_probe, .remove = sx150x_remove, |