From: Greg Meiste <w30289@motorola.com>
Date: Thu, 5 Aug 2010 15:38:12 +0000 (-0500)
Subject: [ARM] tegra: stingray: Configure Charge LED
X-Git-Tag: firefly_0821_release~9834^2~727
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=243777788c80b313d4bb57aa65e17536171c16cd;p=firefly-linux-kernel-4.4.55.git

[ARM] tegra: stingray: Configure Charge LED

Configure GPIO_PZ5 to control the charge LED.  For now, charge LEDs
are enabled when device is powered up.  GPIO is also exported to
enable factory testing.

Change-Id: I6bf7345cc795d57c1312c2c14ab1c74863a421ce
Signed-off-by: Greg Meiste <w30289@motorola.com>
---

diff --git a/arch/arm/mach-tegra/board-stingray.c b/arch/arm/mach-tegra/board-stingray.c
index 949238cc4135..4312cbbcd0ad 100644
--- a/arch/arm/mach-tegra/board-stingray.c
+++ b/arch/arm/mach-tegra/board-stingray.c
@@ -861,6 +861,17 @@ static void __init tegra_stingray_init(void)
 		gpio_export(TEGRA_GPIO_PI4, false);
 	}
 
+	/* Enable charge LEDs */
+	if (stingray_revision() >= STINGRAY_REVISION_P0) {
+		/* Set the SYS_CLK_REQ override bit to allow PZ5 to be used
+		   as a GPIO. */
+		writel(0, IO_TO_VIRT(TEGRA_PMC_BASE + 0x01C));
+		tegra_gpio_enable(TEGRA_GPIO_PZ5);
+		gpio_request(TEGRA_GPIO_PZ5, "chg_led_disable");
+		gpio_direction_output(TEGRA_GPIO_PZ5, 0);
+		gpio_export(TEGRA_GPIO_PZ5, false);
+	}
+
 	stingray_pinmux_init();
 
 	tegra_clk_init_from_table(stingray_clk_init_table);