[PATCH 1/1] ARM: DTS: dra72-evm: remove cpsw gpio hogging and add select-slave-gpio

[PATCH 1/1] ARM: DTS: dra72-evm: remove cpsw gpio hogging and add select-slave-gpio

[Mugunthan V N]

Since GPIO hogging fails to through error when booting with
gpio-pcf857x as module and NFS root filesystem. So by having
mode-gpio, it throw error to user so that the used can make
gpio-pcf857x as inbuilt for NFS. 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-l0cyMroinI0@public.gmane.org>
---

The driver patch is applied to net-next branch (also present in
linux-next) with commit '1d147ccbfc35 ("drivers: net: cpsw: Add
support to drive gpios for ethernet to be functional") and logs
[1] also pushed a branch [2] for testing.

[1]: http://pastebin.ubuntu.com/12306224/
[2]: git://git.ti.com/~mugunthanvnm/ti-linux-kernel/linux.git cpsw-gpio-optional-v3

---
 arch/arm/boot/dts/dra72-evm.dts | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/arch/arm/boot/dts/dra72-evm.dts b/arch/arm/boot/dts/dra72-evm.dts
index c11ccb1..b7eca13 100644
--- a/arch/arm/boot/dts/dra72-evm.dts
+++ b/arch/arm/boot/dts/dra72-evm.dts
@@ -353,12 +353,6 @@
 		interrupts = <11 IRQ_TYPE_EDGE_FALLING>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
-
-		cpsw_sel_s0 {
-			gpio-hog;
-			gpios = <4 GPIO_ACTIVE_HIGH>;
-			output-low;
-		};
 	};
 };
 
@@ -590,6 +584,7 @@
 	pinctrl-0 = <&cpsw_default>;
 	pinctrl-1 = <&cpsw_sleep>;
 	slaves = <1>;
+	mode-gpios = <&pcf_gpio_21 4 GPIO_ACTIVE_HIGH>;
 };
 
 &cpsw_emac0 {
-- 
2.6.0.rc2.10.gf4d9753

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Re: [PATCH 1/1] ARM: DTS: dra72-evm: remove cpsw gpio hogging and add select-slave-gpio

[Mugunthan V N]

On Monday 21 September 2015 01:34 PM, Mugunthan V N wrote:
> Since GPIO hogging fails to through error when booting with
> gpio-pcf857x as module and NFS root filesystem. So by having
> mode-gpio, it throw error to user so that the used can make
> gpio-pcf857x as inbuilt for NFS. 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-l0cyMroinI0@public.gmane.org>

There is some typo error. Will submit a v2 ASAP

Regards
Mugunthan V N

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