Commit 36958598 authored Sep 21, 2015 by Mugunthan V N Committed by Tony Lindgren Oct 20, 2015

ARM: dts: dra72-evm: remove cpsw gpio hogging and add mode-gpios



With the current implementation of GPIO hogging and with
gpio-pcf857x is built as module, ethernet doesn't work on boot
and doesn't throw any error/warning to user. Ethernet becomes
operational when inserting gpio-pcf857x module, even this time
there is no error/warning logs to user that ethernet is
operational.

When using with NFS rootfs and gpio-pcf857x as module, board
doesn't boot as it doesn't get any ip address and doesn't throw
any error/warning. To over come this, now cpsw driver tries to
get mode-gpios. When gpio-pcf857x is built as module it will
throw error, so that user can decide either to built in
gpio-pcf857x to continue with nfs boot or choose alternate rootfs
filesystem like sd/ramdisk.

When using mmc/ramdisk as root fs, cpsw will probe defer and
re-probes again when gpio-pcf857x module is inserted and ethernet
becomes operational.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

parent 23c74bf5

arch/arm/boot/dts/dra72-evm.dts

+1 −6

Original line number	Diff line number	Diff line
		@@ -429,12 +429,6 @@
		interrupts = <11 IRQ_TYPE_EDGE_FALLING>;
		interrupt-controller;
		#interrupt-cells = <2>;

		cpsw_sel_s0 {
		gpio-hog;
		gpios = <4 GPIO_ACTIVE_HIGH>;
		output-low;
		};
		};

		tlv320aic3106: tlv320aic3106@19 {
		@@ -689,6 +683,7 @@
		pinctrl-0 = <&cpsw_default>;
		pinctrl-1 = <&cpsw_sleep>;
		slaves = <1>;
		mode-gpios = <&pcf_gpio_21 4 GPIO_ACTIVE_HIGH>;
		};

		&cpsw_emac0 {