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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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  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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