imx: mx6sl: add lcdif clock support

Add lcdif clock support for i.MX6SL.

Signed-off-by: Peng Fan <peng.fan@nxp.com>

arch/arm/cpu/armv7/mx6/clock.c

@@ -625,16 +625,18 @@ void mxs_set_lcdclk(u32 base_addr, u32 freq)
 
 	debug("mxs_set_lcdclk, freq = %dKHz\n", freq);
 
-	if (!is_mx6sx() && !is_mx6ul() && !is_mx6ull()) {
+	if (!is_mx6sx() && !is_mx6ul() && !is_mx6ull() && !is_mx6sl()) {
 		debug("This chip not support lcd!\n");
 		return;
 	}
 
-	if (base_addr == LCDIF1_BASE_ADDR) {
-		reg = readl(&imx_ccm->cscdr2);
-		/* Can't change clocks when clock not from pre-mux */
-		if ((reg & MXC_CCM_CSCDR2_LCDIF1_CLK_SEL_MASK) != 0)
-			return;
+	if (!is_mx6sl()) {
+		if (base_addr == LCDIF1_BASE_ADDR) {
+			reg = readl(&imx_ccm->cscdr2);
+			/* Can't change clocks when clock not from pre-mux */
+			if ((reg & MXC_CCM_CSCDR2_LCDIF1_CLK_SEL_MASK) != 0)
+				return;
+		}
 	}
 
 	if (is_mx6sx()) {
@@ -705,19 +707,35 @@ void mxs_set_lcdclk(u32 base_addr, u32 freq)
 		if (enable_pll_video(pll_div, pll_num, pll_denom, post_div))
 			return;
 
-		/* Select pre-lcd clock to PLL5 and set pre divider */
-		clrsetbits_le32(&imx_ccm->cscdr2,
-				MXC_CCM_CSCDR2_LCDIF1_PRED_SEL_MASK |
-				MXC_CCM_CSCDR2_LCDIF1_PRE_DIV_MASK,
-				(0x2 << MXC_CCM_CSCDR2_LCDIF1_PRED_SEL_OFFSET) |
-				((pred - 1) <<
-				 MXC_CCM_CSCDR2_LCDIF1_PRE_DIV_OFFSET));
-
-		/* Set the post divider */
-		clrsetbits_le32(&imx_ccm->cbcmr,
-				MXC_CCM_CBCMR_LCDIF1_PODF_MASK,
-				((postd - 1) <<
-				 MXC_CCM_CBCMR_LCDIF1_PODF_OFFSET));
+		if (!is_mx6sl()) {
+			/* Select pre-lcd clock to PLL5 and set pre divider */
+			clrsetbits_le32(&imx_ccm->cscdr2,
+					MXC_CCM_CSCDR2_LCDIF1_PRED_SEL_MASK |
+					MXC_CCM_CSCDR2_LCDIF1_PRE_DIV_MASK,
+					(0x2 << MXC_CCM_CSCDR2_LCDIF1_PRED_SEL_OFFSET) |
+					((pred - 1) <<
+					 MXC_CCM_CSCDR2_LCDIF1_PRE_DIV_OFFSET));
+
+			/* Set the post divider */
+			clrsetbits_le32(&imx_ccm->cbcmr,
+					MXC_CCM_CBCMR_LCDIF1_PODF_MASK,
+					((postd - 1) <<
+					MXC_CCM_CBCMR_LCDIF1_PODF_OFFSET));
+		} else {
+			/* Select pre-lcd clock to PLL5 and set pre divider */
+			clrsetbits_le32(&imx_ccm->cscdr2,
+					MXC_CCM_CSCDR2_LCDIF_PIX_CLK_SEL_MASK |
+					MXC_CCM_CSCDR2_LCDIF_PIX_PRE_DIV_MASK,
+					(0x2 << MXC_CCM_CSCDR2_LCDIF_PIX_CLK_SEL_OFFSET) |
+					((pred - 1) <<
+					 MXC_CCM_CSCDR2_LCDIF_PIX_PRE_DIV_OFFSET));
+
+			/* Set the post divider */
+			clrsetbits_le32(&imx_ccm->cscmr1,
+					MXC_CCM_CSCMR1_LCDIF_PIX_PODF_MASK,
+					(((postd - 1)^0x6) <<
+					 MXC_CCM_CSCMR1_LCDIF_PIX_PODF_OFFSET));
+		}
 	} else if (is_mx6sx()) {
 		/* Setting LCDIF2 for i.MX6SX */
 		if (enable_pll_video(pll_div, pll_num, pll_denom, post_div))
@@ -767,6 +785,28 @@ int enable_lcdif_clock(u32 base_addr)
 		/* Set to pre-mux clock at default */
 		lcdif_clk_sel_mask = MXC_CCM_CSCDR2_LCDIF1_CLK_SEL_MASK;
 		lcdif_ccgr3_mask =  MXC_CCM_CCGR3_LCDIF1_PIX_MASK;
+	} else if (is_mx6sl()) {
+		if (base_addr != LCDIF1_BASE_ADDR) {
+			puts("Wrong LCD interface!\n");
+			return -EINVAL;
+		}
+
+		reg = readl(&imx_ccm->CCGR3);
+		reg &= ~(MXC_CCM_CCGR3_LCDIF_AXI_MASK |
+			 MXC_CCM_CCGR3_LCDIF_PIX_MASK);
+		writel(reg, &imx_ccm->CCGR3);
+
+		reg = readl(&imx_ccm->cscdr3);
+		reg &= ~MXC_CCM_CSCDR3_LCDIF_AXI_CLK_SEL_MASK;
+		reg |= 1 << MXC_CCM_CSCDR3_LCDIF_AXI_CLK_SEL_OFFSET;
+		writel(reg, &imx_ccm->cscdr3);
+
+		reg = readl(&imx_ccm->CCGR3);
+		reg |= MXC_CCM_CCGR3_LCDIF_AXI_MASK |
+			MXC_CCM_CCGR3_LCDIF_PIX_MASK;
+		writel(reg, &imx_ccm->CCGR3);
+
+		return 0;
 	} else {
 		return 0;
 	}

arch/arm/include/asm/arch-mx6/crm_regs.h

@@ -307,6 +307,9 @@ struct mxc_ccm_reg {
 /* LCFIF2_PODF on i.MX6SX */
 #define MXC_CCM_CSCMR1_LCDIF2_PODF_MASK			(0x7 << 20)
 #define MXC_CCM_CSCMR1_LCDIF2_PODF_OFFSET               20
+/* LCDIF_PIX_PODF on i.MX6SL */
+#define MXC_CCM_CSCMR1_LCDIF_PIX_PODF_MASK		(0x7 << 20)
+#define MXC_CCM_CSCMR1_LCDIF_PIX_PODF_OFFSET		20
 /* ACLK_EMI on i.MX6DQ/SDL/DQP */
 #define MXC_CCM_CSCMR1_ACLK_EMI_PODF_MASK		(0x7 << 20)
 #define MXC_CCM_CSCMR1_ACLK_EMI_PODF_OFFSET		20
@@ -529,6 +532,12 @@ struct mxc_ccm_reg {
 #define MXC_CCM_CSCDR2_LCDIF2_CLK_SEL_MASK              (0x7 << 0)
 #define MXC_CCM_CSCDR2_LCDIF2_CLK_SEL_OFFSET             0
 
+/*LCD on i.MX6SL */
+#define MXC_CCM_CSCDR2_LCDIF_PIX_CLK_SEL_MASK		(0x7 << 6)
+#define MXC_CCM_CSCDR2_LCDIF_PIX_CLK_SEL_OFFSET		6
+#define MXC_CCM_CSCDR2_LCDIF_PIX_PRE_DIV_MASK		(0x7 << 3)
+#define MXC_CCM_CSCDR2_LCDIF_PIX_PRE_DIV_OFFSET		3
+
 /* All IPU2_DI1 are LCDIF1 on MX6SX */
 #define MXC_CCM_CHSCCDR_IPU2_DI1_PRE_CLK_SEL_MASK	(0x7 << 15)
 #define MXC_CCM_CHSCCDR_IPU2_DI1_PRE_CLK_SEL_OFFSET	15
@@ -554,6 +563,12 @@ struct mxc_ccm_reg {
 #define MXC_CCM_CSCDR3_IPU1_HSP_CLK_SEL_MASK		(0x3 << 9)
 #define MXC_CCM_CSCDR3_IPU1_HSP_CLK_SEL_OFFSET		9
 
+/* For i.MX6SL */
+#define MXC_CCM_CSCDR3_LCDIF_AXI_PODF_MASK		(0x7 << 16)
+#define MXC_CCM_CSCDR3_LCDIF_AXI_PODF_OFFSET		16
+#define MXC_CCM_CSCDR3_LCDIF_AXI_CLK_SEL_MASK		(0x3 << 14)
+#define MXC_CCM_CSCDR3_LCDIF_AXI_CLK_SEL_OFFSET		14
+
 /* Define the bits in register CDHIPR */
 #define MXC_CCM_CDHIPR_ARM_PODF_BUSY			(1 << 16)
 #define MXC_CCM_CDHIPR_PERIPH_CLK_SEL_BUSY		(1 << 5)
@@ -783,6 +798,12 @@ struct mxc_ccm_reg {
 #define MXC_CCM_CCGR3_QSPI_OFFSET				14
 #define MXC_CCM_CCGR3_QSPI_MASK					(3 << MXC_CCM_CCGR3_QSPI_OFFSET)
 
+/* i.MX6SL */
+#define MXC_CCM_CCGR3_LCDIF_AXI_OFFSET				6
+#define MXC_CCM_CCGR3_LCDIF_AXI_MASK				(3 << MXC_CCM_CCGR3_LCDIF_AXI_OFFSET)
+#define MXC_CCM_CCGR3_LCDIF_PIX_OFFSET				8
+#define MXC_CCM_CCGR3_LCDIF_PIX_MASK				(3 << MXC_CCM_CCGR3_LCDIF_PIX_OFFSET)
+
 #define MXC_CCM_CCGR3_IPU1_IPU_OFFSET				0
 #define MXC_CCM_CCGR3_IPU1_IPU_MASK				(3 << MXC_CCM_CCGR3_IPU1_IPU_OFFSET)
 #define MXC_CCM_CCGR3_IPU1_IPU_DI0_OFFSET			2