From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH v1 03/12] gpiolib: add gpio_get_chip helper
Date: Mon, 17 Jun 2019 17:07:42 +0200 [thread overview]
Message-ID: <20190617150751.3421-4-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20190617150751.3421-1-a.fatoum@pengutronix.de>
Pinctrl nodes adhering to the generic pinctrl bindings may contain
properties like input-low/input-high, which require pinctrl_ops.set_state
to have a handle on the relevant gpio chip.
Currently this would lead to code duplication: Both the pinctrl driver
and gpiolib will need to store a list of registered gpiochips.
Avoid this by providing a helper to query the registered gpio_chip
given a gpio's number.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
drivers/gpio/gpiolib.c | 7 +++++++
include/gpio.h | 1 +
2 files changed, 8 insertions(+)
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 4c7aee4a0b19..f96009896a41 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -475,6 +475,13 @@ int gpio_get_num(struct device_d *dev, int gpio)
return -EPROBE_DEFER;
}
+struct gpio_chip *gpio_get_chip(int gpio)
+{
+ struct gpio_info *gi = gpio_to_desc(gpio);
+
+ return gi ? gi->chip : NULL;
+}
+
#ifdef CONFIG_CMD_GPIO
static int do_gpiolib(int argc, char *argv[])
{
diff --git a/include/gpio.h b/include/gpio.h
index 38d6ba2df913..e822fd53475d 100644
--- a/include/gpio.h
+++ b/include/gpio.h
@@ -153,5 +153,6 @@ int gpiochip_add(struct gpio_chip *chip);
void gpiochip_remove(struct gpio_chip *chip);
int gpio_get_num(struct device_d *dev, int gpio);
+struct gpio_chip *gpio_get_chip(int gpio);
#endif /* __GPIO_H */
--
2.20.1
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next prev parent reply other threads:[~2019-06-17 15:07 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-17 15:07 [PATCH v1 00/12] ARM: stm32mp: add drivers for GPIO, pinctrl Ahmad Fatoum
2019-06-17 15:07 ` [PATCH v1 01/12] ARM: dts: stm32mp157a-dk1.dts: include upstream dts before barebox' Ahmad Fatoum
2019-06-17 15:07 ` [PATCH v1 02/12] ARM: dts: stm32mp: factor out common DK nodes into dtsi Ahmad Fatoum
2019-06-17 15:07 ` Ahmad Fatoum [this message]
2019-06-17 15:07 ` [PATCH v1 04/12] driver: add stubs for hardware spinlocks Ahmad Fatoum
2019-06-17 15:07 ` [PATCH v1 05/12] pinctrl: add driver for STM32 GPIO and pin multiplexer Ahmad Fatoum
2019-06-17 15:07 ` [PATCH v1 06/12] ARM: dts: stm32mp157a-dk1: enable heartbeat and error LEDs Ahmad Fatoum
2019-06-17 15:07 ` [PATCH v1 07/12] ARM: stm32mp: turn on GPIO related options Ahmad Fatoum
2019-06-17 15:07 ` [PATCH v1 08/12] ARM: stm32mp157c-dk2: add board-specific sysconf fixups Ahmad Fatoum
2019-06-17 15:14 ` Ahmad Fatoum
2019-06-18 5:43 ` Rouven Czerwinski
2019-06-17 15:07 ` [PATCH v1 09/12] ARM: psci: fix erroneous call of ->system_reset on system_off Ahmad Fatoum
2019-06-17 15:07 ` [PATCH v1 10/12] ARM: sm: move get_gicd_base_address to header for reuse Ahmad Fatoum
2019-06-17 15:07 ` [PATCH v1 11/12] ARM: stm32mp: implement PSCI support Ahmad Fatoum
2019-06-17 15:07 ` [PATCH v1 12/12] ARM: stm32mp157c-dk2: boot kernel in nonsecure mode Ahmad Fatoum
2019-06-20 14:32 ` [PATCH v1 00/12] ARM: stm32mp: add drivers for GPIO, pinctrl Sascha Hauer
2019-07-03 16:51 ` Ahmad Fatoum
2019-07-04 5:39 ` Ahmad Fatoum
2019-07-04 7:01 ` Sascha Hauer
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