This patch support exynos5 lcd clock control.
Signed-off-by: Donghwa Lee <dh09....@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.p...@samsung.com>
---
arch/arm/cpu/armv7/exynos/clock.c | 108 ++++++++++++++++++++++++++++++++++++-
1 files changed, 107 insertions(+), 1 deletions(-)
diff --git a/arch/arm/cpu/armv7/exynos/clock.c
b/arch/arm/cpu/armv7/exynos/clock.c
index 7326655..3143f7e 100644
--- a/arch/arm/cpu/armv7/exynos/clock.c
+++ b/arch/arm/cpu/armv7/exynos/clock.c
@@ -480,6 +480,48 @@ static unsigned long exynos4_get_lcd_clk(void)
return pclk;
}
+/* get_lcd_clk: return lcd clock frequency */
+static unsigned long exynos5_get_lcd_clk(void)
+{
+ struct exynos5_clock *clk =
+ (struct exynos5_clock *)samsung_get_base_clock();
+ unsigned long pclk, sclk;
+ unsigned int sel;
+ unsigned int ratio;
+
+ /*
+ * CLK_SRC_LCD0
+ * FIMD0_SEL [3:0]
+ */
+ sel = readl(&clk->src_disp1_0);
+ sel = sel & 0xf;
+
+ /*
+ * 0x6: SCLK_MPLL
+ * 0x7: SCLK_EPLL
+ * 0x8: SCLK_VPLL
+ */
+ if (sel == 0x6)
+ sclk = get_pll_clk(MPLL);
+ else if (sel == 0x7)
+ sclk = get_pll_clk(EPLL);
+ else if (sel == 0x8)
+ sclk = get_pll_clk(VPLL);
+ else
+ return 0;
+
+ /*
+ * CLK_DIV_LCD0
+ * FIMD0_RATIO [3:0]
+ */
+ ratio = readl(&clk->div_disp1_0);
+ ratio = ratio & 0xf;
+
+ pclk = sclk / (ratio + 1);
+
+ return pclk;
+}
+
void exynos4_set_lcd_clk(void)
{
struct exynos4_clock *clk =
@@ -542,6 +584,68 @@ void exynos4_set_lcd_clk(void)
writel(cfg, &clk->div_lcd0);
}
+void exynos5_set_lcd_clk(void)
+{
+ struct exynos5_clock *clk =
+ (struct exynos5_clock *)samsung_get_base_clock();
+ unsigned int cfg = 0;
+
+ /*
+ * CLK_GATE_BLOCK
+ * CLK_CAM [0]
+ * CLK_TV [1]
+ * CLK_MFC [2]
+ * CLK_G3D [3]
+ * CLK_LCD0 [4]
+ * CLK_LCD1 [5]
+ * CLK_GPS [7]
+ */
+ cfg = readl(&clk->gate_block);
+ cfg |= 1 << 4;
+ writel(cfg, &clk->gate_block);
+
+ /*
+ * CLK_SRC_LCD0
+ * FIMD0_SEL [3:0]
+ * MDNIE0_SEL [7:4]
+ * MDNIE_PWM0_SEL [8:11]
+ * MIPI0_SEL [12:15]
+ * set lcd0 src clock 0x6: SCLK_MPLL
+ */
+ cfg = readl(&clk->src_disp1_0);
+ cfg &= ~(0xf);
+ cfg |= 0x8;
+ writel(cfg, &clk->src_disp1_0);
+
+ /*
+ * CLK_GATE_IP_LCD0
+ * CLK_FIMD0 [0]
+ * CLK_MIE0 [1]
+ * CLK_MDNIE0 [2]
+ * CLK_DSIM0 [3]
+ * CLK_SMMUFIMD0 [4]
+ * CLK_PPMULCD0 [5]
+ * Gating all clocks for FIMD0
+ */
+ cfg = readl(&clk->gate_ip_disp1);
+ cfg |= 1 << 0;
+ writel(cfg, &clk->gate_ip_disp1);
+
+ /*
+ * CLK_DIV_LCD0
+ * FIMD0_RATIO [3:0]
+ * MDNIE0_RATIO [7:4]
+ * MDNIE_PWM0_RATIO [11:8]
+ * MDNIE_PWM_PRE_RATIO [15:12]
+ * MIPI0_RATIO [19:16]
+ * MIPI0_PRE_RATIO [23:20]
+ * set fimd ratio
+ */
+ cfg &= ~(0xf);
+ cfg |= 0x0;
+ writel(cfg, &clk->div_disp1_0);
+}
+
void exynos4_set_mipi_clk(void)
{
struct exynos4_clock *clk =
@@ -680,13 +784,15 @@ unsigned long get_lcd_clk(void)
if (cpu_is_exynos4())
return exynos4_get_lcd_clk();
else
- return 0;
+ return exynos5_get_lcd_clk();
}
void set_lcd_clk(void)
{
if (cpu_is_exynos4())
exynos4_set_lcd_clk();
+ else
+ exynos5_set_lcd_clk();
}
void set_mipi_clk(void)
--
1.7.4.1
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