[PATCH/RFC 2/3] i2c: gpio: Add support for named gpios in DT
From: Geert Uytterhoeven <hidden>
Date: 2017-08-24 09:21:13
Also in:
linux-i2c, linux-renesas-soc
Subsystem:
generic gpio i2c driver, i2c subsystem, i2c subsystem host drivers, the rest · Maintainers:
Wolfram Sang, Andi Shyti, Linus Torvalds
Possibly related (same subject, not in this thread)
- 2017-09-13 · Re: [PATCH/RFC 2/3] i2c: gpio: Add support for named gpios in DT · Wolfram Sang <hidden>
- 2017-09-13 · Re: [PATCH/RFC 2/3] i2c: gpio: Add support for named gpios in DT · Wolfram Sang <hidden>
Add support for the new DT bindings using named gpios, which are less error-prone than unnamed gpios. The latter are still supported as a fallback. Signed-off-by: Geert Uytterhoeven <redacted> --- drivers/i2c/busses/i2c-gpio.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/i2c/busses/i2c-gpio.c b/drivers/i2c/busses/i2c-gpio.c
index 0ef8fcc6ac3aca1e..45b7ec99dc210bbe 100644
--- a/drivers/i2c/busses/i2c-gpio.c
+++ b/drivers/i2c/busses/i2c-gpio.c@@ -88,6 +88,15 @@ static int i2c_gpio_getscl(void *data) static int of_i2c_gpio_get_pins(struct device_node *np, unsigned int *sda_pin, unsigned int *scl_pin) { + *sda_pin = of_get_named_gpio(np, "sda-gpios", 0); + *scl_pin = of_get_named_gpio(np, "scl-gpios", 0); + if (*sda_pin == -EPROBE_DEFER || *scl_pin == -EPROBE_DEFER) + return -EPROBE_DEFER; + + if (gpio_is_valid(*sda_pin) && gpio_is_valid(*scl_pin)) + return 0; + + /* Try deprecated unnamed gpios */ if (of_gpio_count(np) < 2) return -ENODEV;
--
2.7.4
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