6.6-stable review patch. If anyone has any objections, please let me know.
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From: Gabor Juhos j4g8y7@gmail.com
commit b04f0d89e880bc2cca6a5c73cf287082c91878da upstream.
The two alarm LEDs of on the uDPU board are stopped working since commit 78efa53e715e ("leds: Init leds class earlier").
The LEDs are driven by the GPIO{15,16} pins of the North Bridge GPIO controller. These pins are part of the 'spi_quad' pin group for which the 'spi' function is selected via the default pinctrl state of the 'spi' node. This is wrong however, since in order to allow controlling the LEDs, the pins should use the 'gpio' function.
Before the commit mentined above, the 'spi' function is selected first by the pinctrl core before probing the spi driver, but then it gets overridden to 'gpio' implicitly via the devm_gpiod_get_index_optional() call from the 'leds-gpio' driver.
After the commit, the LED subsystem gets initialized before the SPI subsystem, so the function of the pin group remains 'spi' which in turn prevents controlling of the LEDs.
Despite the change of the initialization order, the root cause is that the pinctrl state definition is wrong since its initial commit 0d45062cfc89 ("arm64: dts: marvell: Add device tree for uDPU board"),
To fix the problem, override the function in the 'spi_quad_pins' node to 'gpio' and move the pinctrl state definition from the 'spi' node into the 'leds' node.
Cc: stable@vger.kernel.org # needs adjustment for < 6.1 Fixes: 0d45062cfc89 ("arm64: dts: marvell: Add device tree for uDPU board") Signed-off-by: Gabor Juhos j4g8y7@gmail.com Signed-off-by: Imre Kaloz kaloz@openwrt.org Signed-off-by: Gregory CLEMENT gregory.clement@bootlin.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm64/boot/dts/marvell/armada-3720-uDPU.dtsi | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
--- a/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dtsi +++ b/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dtsi @@ -26,6 +26,8 @@
leds { compatible = "gpio-leds"; + pinctrl-names = "default"; + pinctrl-0 = <&spi_quad_pins>;
led-power1 { label = "udpu:green:power"; @@ -82,8 +84,6 @@
&spi0 { status = "okay"; - pinctrl-names = "default"; - pinctrl-0 = <&spi_quad_pins>;
flash@0 { compatible = "jedec,spi-nor"; @@ -108,6 +108,10 @@ }; };
+&spi_quad_pins { + function = "gpio"; +}; + &pinctrl_nb { i2c2_recovery_pins: i2c2-recovery-pins { groups = "i2c2";