From: Jaewon Kim <jaewon02.kim@samsung.com>
Date: Tue, 16 Aug 2016 09:47:38 +0000 (+0900)
Subject: board: samsung: artik5: setup pwm early
X-Git-Tag: submit/tizen/20161205.083345^0
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=refs%2Fheads%2Ftizen_3.0;p=profile%2Fcommon%2Fplatform%2Fkernel%2Fu-boot-artik.git

board: samsung: artik5: setup pwm early

This patch setups pwm channel 0 and 1 in order to maintain
the pwm gpio signal to low until use in kernel.

Change-Id: I170c1af8f686a0ea7cc37f385ab4a657b1fcd054
Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com>
---

diff --git a/board/samsung/espresso3250/espresso3250.c b/board/samsung/espresso3250/espresso3250.c
index 0df24873f..394022c4f 100644
--- a/board/samsung/espresso3250/espresso3250.c
+++ b/board/samsung/espresso3250/espresso3250.c
@@ -44,6 +44,18 @@
 DECLARE_GLOBAL_DATA_PTR;
 unsigned int OmPin;
 
+void pwm_early_init(unsigned int channel)
+{
+	struct exynos3_gpio_part1 *bank =
+		(struct exynos3_gpio_part1 *)samsung_get_base_gpio_part1();
+
+	if (channel > 4)
+		return;
+
+	pwm_enable(channel);
+	pwm_disable(channel);
+	s5p_gpio_cfg_pin(&bank->d0, channel, GPIO_FUNC(0x2));
+}
 
 int board_init(void)
 {
@@ -129,6 +141,10 @@ int board_init(void)
 		printf(" Please check OM_pin\n");
 	}
 
+	/* Enable PWM to maintain the PWM output signal to low */
+	pwm_early_init(0);
+	pwm_early_init(1);
+
 	return 0;
 }