diff options
| -rw-r--r-- | Documentation/devicetree/bindings/i2c/samsung-i2c.txt | 20 | ||||
| -rw-r--r-- | drivers/i2c/busses/i2c-s3c2410.c | 12 |
2 files changed, 24 insertions, 8 deletions
diff --git a/Documentation/devicetree/bindings/i2c/samsung-i2c.txt b/Documentation/devicetree/bindings/i2c/samsung-i2c.txt index b6cb5a12c67..e9611ace879 100644 --- a/Documentation/devicetree/bindings/i2c/samsung-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/samsung-i2c.txt @@ -13,11 +13,17 @@ Required properties: - interrupts: interrupt number to the cpu. - samsung,i2c-sda-delay: Delay (in ns) applied to data line (SDA) edges. +Required for all cases except "samsung,s3c2440-hdmiphy-i2c": + - Samsung GPIO variant (deprecated): + - gpios: The order of the gpios should be the following: <SDA, SCL>. + The gpio specifier depends on the gpio controller. Required in all + cases except for "samsung,s3c2440-hdmiphy-i2c" whose input/output + lines are permanently wired to the respective clienta + - Pinctrl variant (preferred, if available): + - pinctrl-0: Pin control group to be used for this controller. + - pinctrl-names: Should contain only one value - "default". + Optional properties: - - gpios: The order of the gpios should be the following: <SDA, SCL>. - The gpio specifier depends on the gpio controller. Required in all - cases except for "samsung,s3c2440-hdmiphy-i2c" whose input/output - lines are permanently wired to the respective client - samsung,i2c-slave-addr: Slave address in multi-master enviroment. If not specified, default value is 0. - samsung,i2c-max-bus-freq: Desired frequency in Hz of the bus. If not @@ -31,8 +37,14 @@ Example: interrupts = <345>; samsung,i2c-sda-delay = <100>; samsung,i2c-max-bus-freq = <100000>; + /* Samsung GPIO variant begins here */ gpios = <&gpd1 2 0 /* SDA */ &gpd1 3 0 /* SCL */>; + /* Samsung GPIO variant ends here */ + /* Pinctrl variant begins here */ + pinctrl-0 = <&i2c3_bus>; + pinctrl-names = "default"; + /* Pinctrl variant ends here */ #address-cells = <1>; #size-cells = <0>; diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c index f82d11f9b8f..40e2d40bbdb 100644 --- a/drivers/i2c/busses/i2c-s3c2410.c +++ b/drivers/i2c/busses/i2c-s3c2410.c @@ -38,6 +38,7 @@ #include <linux/io.h> #include <linux/of_i2c.h> #include <linux/of_gpio.h> +#include <linux/pinctrl/consumer.h> #include <asm/irq.h> @@ -82,6 +83,7 @@ struct s3c24xx_i2c { struct s3c2410_platform_i2c *pdata; int gpios[2]; + struct pinctrl *pctrl; #ifdef CONFIG_CPU_FREQ struct notifier_block freq_transition; #endif @@ -860,9 +862,8 @@ static int s3c24xx_i2c_init(struct s3c24xx_i2c *i2c) if (pdata->cfg_gpio) pdata->cfg_gpio(to_platform_device(i2c->dev)); - else - if (s3c24xx_i2c_parse_dt_gpio(i2c)) - return -EINVAL; + else if (IS_ERR(i2c->pctrl) && s3c24xx_i2c_parse_dt_gpio(i2c)) + return -EINVAL; /* write slave address */ @@ -1003,6 +1004,8 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) i2c->adap.algo_data = i2c; i2c->adap.dev.parent = &pdev->dev; + i2c->pctrl = devm_pinctrl_get_select_default(i2c->dev); + /* initialise the i2c controller */ ret = s3c24xx_i2c_init(i2c); @@ -1092,7 +1095,8 @@ static int s3c24xx_i2c_remove(struct platform_device *pdev) clk_disable_unprepare(i2c->clk); clk_put(i2c->clk); - s3c24xx_i2c_dt_gpio_free(i2c); + if (pdev->dev.of_node && IS_ERR(i2c->pctrl)) + s3c24xx_i2c_dt_gpio_free(i2c); return 0; } |