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From: Thomas Abraham <thomas.abraham@linaro.org>
To: linux-kernel@vger.kernel.org, devicetree-discuss@lists.ozlabs.org
Cc: linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org, linus.walleij@linaro.org,
	grant.likely@secretlab.ca, rob.herring@calxeda.com,
	kgene.kim@samsung.com, dong.aisheng@linaro.org,
	swarren@wwwdotorg.org, patches@linaro.org
Subject: [PATCH v3 4/4] ARM: EXYNOS: skip wakeup interrupt setup if pinctrl driver is used
Date: Thu, 23 Aug 2012 16:45:29 +0530	[thread overview]
Message-ID: <1345720529-32315-5-git-send-email-thomas.abraham@linaro.org> (raw)
In-Reply-To: <1345720529-32315-1-git-send-email-thomas.abraham@linaro.org>

Pinctrl driver includes support for configuring the external wakeup
interrupts. On exynos platforms that use pinctrl driver, the setup
of wakeup interrupts in the exynos platform code can be skipped.

Cc: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
---
 arch/arm/mach-exynos/common.c |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index 4eb39cd..715b690 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -980,6 +980,32 @@ static int __init exynos_init_irq_eint(void)
 {
 	int irq;
 
+#ifdef CONFIG_PINCTRL_SAMSUNG
+	/*
+	 * The Samsung pinctrl driver provides an integrated gpio/pinmux/pinconf
+	 * functionality along with support for external gpio and wakeup
+	 * interrupts. If the samsung pinctrl driver is enabled and includes
+	 * the wakeup interrupt support, then the setting up external wakeup
+	 * interrupts here can be skipped. This check here is temporary to
+	 * allow exynos4 platforms that do not use Samsung pinctrl driver to
+	 * co-exist with platforms that do. When all of the Samsung Exynos4
+	 * platforms switch over to using the pinctrl driver, the wakeup
+	 * interrupt support code here can be completely removed.
+	 */
+	struct device_node *pctrl_np, *wkup_np;
+	const char *pctrl_compat = "samsung,pinctrl-exynos4210";
+	const char *wkup_compat = "samsung,exynos4210-wakeup-eint";
+
+	for_each_compatible_node(pctrl_np, NULL, pctrl_compat) {
+		if (of_device_is_available(pctrl_np)) {
+			wkup_np = of_find_compatible_node(pctrl_np, NULL,
+							wkup_compat);
+			if (wkup_np)
+				return -ENODEV;
+		}
+	}
+#endif
+
 	if (soc_is_exynos5250())
 		exynos_eint_base = ioremap(EXYNOS5_PA_GPIO1, SZ_4K);
 	else
-- 
1.6.6.rc2


  parent reply	other threads:[~2012-08-23 10:58 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-23 11:15 [PATCH v3 0/4] pinctrl: add support for samsung pinctrl driver Thomas Abraham
2012-08-23 11:15 ` [PATCH v3 1/4] pinctrl: add samsung pinctrl and gpiolib driver Thomas Abraham
2012-08-23 23:12   ` Stephen Warren
2012-08-24  4:25     ` Thomas Abraham
2012-09-03 11:14   ` Linus Walleij
2012-09-04 19:47     ` Thomas Abraham
2012-09-04 21:45       ` Kukjin Kim
2012-09-05  6:20         ` Thomas Abraham
2012-09-06 17:33           ` Stephen Warren
2012-09-06 22:03             ` Kukjin Kim
2012-09-05 13:50   ` Tomasz Figa
2012-09-05 15:19     ` Thomas Abraham
2012-08-23 11:15 ` [PATCH v3 2/4] pinctrl: add exynos4210 specific extensions for samsung pinctrl driver Thomas Abraham
2012-09-03 11:16   ` Linus Walleij
2012-08-23 11:15 ` [PATCH v3 3/4] gpio: exynos4: skip gpiolib registration if pinctrl driver is used Thomas Abraham
2012-08-23 11:15 ` Thomas Abraham [this message]
2012-09-03 11:17   ` [PATCH v3 4/4] ARM: EXYNOS: skip wakeup interrupt setup " Linus Walleij

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