From: Jaehoon Chung <jh80.chung@samsung.com>
Date: Mon, 25 Jul 2016 11:34:35 +0000 (+0900)
Subject: ARM: exynos: power: add the functions for controlling INFORM register
X-Git-Tag: submit/tizen/20160810.050017~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bed13664795cc5c70f4847aa5c12d3c0154dd85f;p=platform%2Fkernel%2Fu-boot.git

ARM: exynos: power: add the functions for controlling INFORM register

To control the INFORM register, add the some functions.
There are INFORM0~3 in exynos5, and there are INFORM0~7 in Exynos4.

Change-Id: I43d9ed09c97e91af2f0aecfb80266b66e0493e0d
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
---

diff --git a/arch/arm/mach-exynos/include/mach/power.h b/arch/arm/mach-exynos/include/mach/power.h
index a0b81e41e4..8b944d3d89 100644
--- a/arch/arm/mach-exynos/include/mach/power.h
+++ b/arch/arm/mach-exynos/include/mach/power.h
@@ -1921,6 +1921,8 @@ enum {
 };
 
 unsigned int get_boot_mode(void);
+unsigned int get_inform_value(int num);
+void clear_inform_value(int num);
 
 void set_mipi_phy_ctrl(unsigned int dev_index, unsigned int enable);
 
diff --git a/arch/arm/mach-exynos/power.c b/arch/arm/mach-exynos/power.c
index cd2d6618ac..f6b32ec481 100644
--- a/arch/arm/mach-exynos/power.c
+++ b/arch/arm/mach-exynos/power.c
@@ -6,6 +6,7 @@
  */
 
 #include <common.h>
+#include <errno.h>
 #include <asm/io.h>
 #include <asm/arch/power.h>
 
@@ -260,3 +261,65 @@ unsigned int get_boot_mode(void)
 
 	return readl(om_pin) & OM_PIN_MASK;
 }
+
+unsigned int exynos5_get_inform_value(int num)
+{
+	struct exynos5_power *power =
+		(struct exynos5_power *)samsung_get_base_power();
+
+	if (num < 0 || num > 3)
+		return -EINVAL;
+	return readl(&power->inform0 + num);
+}
+
+unsigned int exynos4_get_inform_value(int num)
+{
+	struct exynos4_power *power =
+		(struct exynos4_power *)samsung_get_base_power();
+
+	if (num < 0 || num > 7)
+		return -EINVAL;
+	return readl(&power->inform0 + num);
+}
+
+unsigned int get_inform_value(int num)
+{
+	if (cpu_is_exynos5())
+		return exynos5_get_inform_value(num);
+	else
+		return exynos4_get_inform_value(num);
+}
+
+void exynos5_clear_inform(int num)
+{
+	struct exynos5_power *power =
+		(struct exynos5_power *)samsung_get_base_power();
+
+	/* Exynos5 has from INFORM0 to INFORM3 */
+	if (num < 0 || num > 3)
+		return;
+
+	/* Clear to 0 */
+	writel(0, &power->inform0 + num);
+}
+
+void exynos4_clear_inform(int num)
+{
+	struct exynos4_power *power =
+		(struct exynos4_power *)samsung_get_base_power();
+
+	/* Exynos4 has from INFORM0 to INFORM7 */
+	if (num < 0 || num > 7)
+		return;
+
+	/* Clear to 0 */
+	writel(0, &power->inform0 + num);
+}
+
+void clear_inform_value(int num)
+{
+	if (cpu_is_exynos5())
+		exynos5_clear_inform(num);
+	else
+		exynos4_clear_inform(num);
+}