[PATCH v4 4/4] clk: samsung: exynos5420: Setup clocks before system suspend

[Abhilash Kesavan]

Prior to suspending the system, we need to ensure that certain
clock source and gate registers are unmasked.

Signed-off-by: Vikas Sajjan <vikas.sajjan at samsung.com>
Signed-off-by: Abhilash Kesavan <a.kesavan at samsung.com>
---
 drivers/clk/samsung/clk-exynos5420.c |   25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
index e576456..dd509d1 100644
--- a/drivers/clk/samsung/clk-exynos5420.c
+++ b/drivers/clk/samsung/clk-exynos5420.c
@@ -28,6 +28,7 @@
 #define GATE_BUS_CPU		0x700
 #define GATE_SCLK_CPU		0x800
 #define CLKOUT_CMU_CPU		0xa00
+#define SRC_MASK_CPERI		0x4300
 #define GATE_IP_G2D		0x8800
 #define CPLL_LOCK		0x10020
 #define DPLL_LOCK		0x10030
@@ -66,6 +67,8 @@
 #define SRC_TOP10		0x10280
 #define SRC_TOP11		0x10284
 #define SRC_TOP12		0x10288
+#define SRC_MASK_TOP0		0x10300
+#define SRC_MASK_TOP1		0x10304
 #define SRC_MASK_TOP2		0x10308
 #define SRC_MASK_TOP7		0x1031c
 #define SRC_MASK_DISP10		0x1032c
@@ -73,6 +76,7 @@
 #define SRC_MASK_FSYS		0x10340
 #define SRC_MASK_PERIC0		0x10350
 #define SRC_MASK_PERIC1		0x10354
+#define SRC_MASK_ISP		0x10370
 #define DIV_TOP0		0x10500
 #define DIV_TOP1		0x10504
 #define DIV_TOP2		0x10508
@@ -91,6 +95,7 @@
 #define DIV2_RATIO0		0x10590
 #define DIV4_RATIO		0x105a0
 #define GATE_BUS_TOP		0x10700
+#define GATE_BUS_DISP1		0x10728
 #define GATE_BUS_GEN		0x1073c
 #define GATE_BUS_FSYS0		0x10740
 #define GATE_BUS_FSYS2		0x10748
@@ -115,6 +120,7 @@
 #define GATE_TOP_SCLK_MAU	0x1083c
 #define GATE_TOP_SCLK_FSYS	0x10840
 #define GATE_TOP_SCLK_PERIC	0x10850
+#define GATE_IP_PERIC		0x10950
 #define TOP_SPARE2		0x10b08
 #define BPLL_LOCK		0x20010
 #define BPLL_CON0		0x20110
@@ -222,11 +228,30 @@ static unsigned long exynos5420_clk_regs[] __initdata = {
 	DIV_KFC0,
 };
 
+static const struct samsung_clk_reg_dump exynos5420_set_clksrc[] = {
+	{ .offset = SRC_MASK_CPERI,		.value = 0xffffffff, },
+	{ .offset = SRC_MASK_TOP0,		.value = 0x11111111, },
+	{ .offset = SRC_MASK_TOP1,		.value = 0x11101111, },
+	{ .offset = SRC_MASK_TOP2,		.value = 0x11111110, },
+	{ .offset = SRC_MASK_TOP7,		.value = 0x00111100, },
+	{ .offset = SRC_MASK_DISP10,		.value = 0x11111110, },
+	{ .offset = SRC_MASK_MAU,		.value = 0x10000000, },
+	{ .offset = SRC_MASK_FSYS,		.value = 0x11111110, },
+	{ .offset = SRC_MASK_PERIC0,		.value = 0x11111110, },
+	{ .offset = SRC_MASK_PERIC1,		.value = 0x11111100, },
+	{ .offset = SRC_MASK_ISP,		.value = 0x11111000, },
+	{ .offset = GATE_BUS_DISP1,		.value = 0xffffffff, },
+	{ .offset = GATE_IP_PERIC,		.value = 0xffffffff, },
+};
+
 static int exynos5420_clk_suspend(void)
 {
 	samsung_clk_save(reg_base, exynos5420_save,
 				ARRAY_SIZE(exynos5420_clk_regs));
 
+	samsung_clk_restore(reg_base, exynos5420_set_clksrc,
+				ARRAY_SIZE(exynos5420_set_clksrc));
+
 	return 0;
 }
 
-- 
1.7.9.5