Unverified Commit 0a919ae4 authored Apr 02, 2019 by Andrey Smirnov Committed by Mark Brown Apr 05, 2019

spi: Don't call spi_get_gpio_descs() before device name is set



Move code calling spi_get_gpio_descs() to happen after ctlr->dev's
name is set in order to have proper GPIO consumer names.

Before:

cat /sys/kernel/debug/gpio
gpiochip0: GPIOs 0-31, parent: platform/40049000.gpio, vf610-gpio:
 gpio-6   (                    |regulator-usb0-vbus ) out lo

gpiochip1: GPIOs 32-63, parent: platform/4004a000.gpio, vf610-gpio:
 gpio-36  (                    |scl                 ) in  hi
 gpio-37  (                    |sda                 ) in  hi
 gpio-40  (                    |(null) CS1          ) out lo
 gpio-41  (                    |(null) CS0          ) out lo ACTIVE LOW
 gpio-42  (                    |miso                ) in  hi
 gpio-43  (                    |mosi                ) in  lo
 gpio-44  (                    |sck                 ) out lo

After:

cat /sys/kernel/debug/gpio
gpiochip0: GPIOs 0-31, parent: platform/40049000.gpio, vf610-gpio:
 gpio-6   (                    |regulator-usb0-vbus ) out lo

gpiochip1: GPIOs 32-63, parent: platform/4004a000.gpio, vf610-gpio:
 gpio-36  (                    |scl                 ) in  hi
 gpio-37  (                    |sda                 ) in  hi
 gpio-40  (                    |spi0 CS1            ) out lo
 gpio-41  (                    |spi0 CS0            ) out lo ACTIVE LOW
 gpio-42  (                    |miso                ) in  hi
 gpio-43  (                    |mosi                ) in  lo
 gpio-44  (                    |sck                 ) out lo

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Chris Healy <cphealy@gmail.com>
Cc: linux-spi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

parent 249e2632

drivers/spi/spi.c

+19 −18

Original line number	Diff line number	Diff line
		@@ -2281,24 +2281,6 @@ int spi_register_controller(struct spi_controller *ctlr)
		if (status)
		return status;

		if (!spi_controller_is_slave(ctlr)) {
		if (ctlr->use_gpio_descriptors) {
		status = spi_get_gpio_descs(ctlr);
		if (status)
		return status;
		/*
		* A controller using GPIO descriptors always
		* supports SPI_CS_HIGH if need be.
		*/
		ctlr->mode_bits \|= SPI_CS_HIGH;
		} else {
		/* Legacy code path for GPIOs from DT */
		status = of_spi_register_master(ctlr);
		if (status)
		return status;
		}
		}

		/* even if it's just one always-selected device, there must
		* be at least one chipselect
		*/
		@@ -2355,6 +2337,25 @@ int spi_register_controller(struct spi_controller *ctlr)
		* registration fails if the bus ID is in use.
		*/
		dev_set_name(&ctlr->dev, "spi%u", ctlr->bus_num);

		if (!spi_controller_is_slave(ctlr)) {
		if (ctlr->use_gpio_descriptors) {
		status = spi_get_gpio_descs(ctlr);
		if (status)
		return status;
		/*
		* A controller using GPIO descriptors always
		* supports SPI_CS_HIGH if need be.
		*/
		ctlr->mode_bits \|= SPI_CS_HIGH;
		} else {
		/* Legacy code path for GPIOs from DT */
		status = of_spi_register_master(ctlr);
		if (status)
		return status;
		}
		}

		status = device_add(&ctlr->dev);
		if (status < 0) {
		/* free bus id */