EXYNOS5: support exynos5 lcd clock control

This patch support exynos5 lcd clock control.

Signed-off-by: Donghwa Lee <dh09.lee@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

arch/arm/cpu/armv7/exynos/clock.c

@@ -483,6 +483,48 @@ 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 =
@@ -545,6 +587,68 @@ 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 =
@@ -683,13 +787,15 @@ 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)