linux-kernel - [PATCH] ARM: pxa: activate pinctrl for device-tree machines

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Date:	Sat,  2 Apr 2016 20:56:02 +0200
From:	Robert Jarzmik <robert.jarzmik@...e.fr>
To:	Daniel Mack <daniel@...que.org>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Robert Jarzmik <robert.jarzmik@...e.fr>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Masahiro Yamada <yamada.masahiro@...ionext.com>
Subject: [PATCH] ARM: pxa: activate pinctrl for device-tree machines

Pincontrol is not yet ready for all PXA platforms.
For example, a legacy platform, if PINCTRL was activated, will fail its
calls to gpio_request() or gpio_direction_output(), as the pinctrl
driver might not be available, such as for pxa25x and pxa3xx.

As a step forward, activate pincontrol for all device-tree available
machines, ie. pxa27x device-tree based and pxa3xx device-tree based.

If it appears later that pincontrol is also required for legacy
platforms and if the mfp->pinctrl conversion can be achieved, then
PINCTRL will be activated for the whole PXA architecture.

Cc: Linus Walleij <linus.walleij@...aro.org>
Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>
Signed-off-by: Robert Jarzmik <robert.jarzmik@...e.fr>
---
 arch/arm/mach-pxa/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index 7ee4652b4c61..cd894d69e766 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -6,6 +6,7 @@ comment "Intel/Marvell Dev Platforms (sorted by hardware release time)"

 config MACH_PXA27X_DT
 	bool "Support PXA27x platforms from device tree"
+	select PINCTRL
 	select POWER_SUPPLY
 	select PXA27x
 	select USE_OF
@@ -17,6 +18,7 @@ config MACH_PXA27X_DT
 config MACH_PXA3XX_DT
 	bool "Support PXA3xx platforms from device tree"
 	select CPU_PXA300
+	select PINCTRL
 	select POWER_SUPPLY
 	select PXA3xx
 	select USE_OF
-- 
2.1.4