[PATCH 1/7] clk: apq8016: Add support for UART1 clocks

[Sumit Garg]

SE HMIBSC board uses UART1 as the main debug console, so add
corresponding clocks support.

Signed-off-by: Sumit Garg <sumit.garg at linaro.org>
---
 drivers/clk/qcom/clock-apq8016.c | 44 ++++++++++++++++++++++++++++----
 1 file changed, 39 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/qcom/clock-apq8016.c b/drivers/clk/qcom/clock-apq8016.c
index c0ce570edc7..fb663d2e92e 100644
--- a/drivers/clk/qcom/clock-apq8016.c
+++ b/drivers/clk/qcom/clock-apq8016.c
@@ -42,6 +42,14 @@
 #define BLSP1_UART2_APPS_N		(0x3040)
 #define BLSP1_UART2_APPS_D		(0x3044)
 
+#define BLSP1_UART1_BCR			(0x2038)
+#define BLSP1_UART1_APPS_CBCR		(0x203C)
+#define BLSP1_UART1_APPS_CMD_RCGR	(0x2044)
+#define BLSP1_UART1_APPS_CFG_RCGR	(0x2048)
+#define BLSP1_UART1_APPS_M		(0x204C)
+#define BLSP1_UART1_APPS_N		(0x2050)
+#define BLSP1_UART1_APPS_D		(0x2054)
+
 /* GPLL0 clock control registers */
 #define GPLL0_STATUS_ACTIVE BIT(17)
 
@@ -93,6 +101,33 @@ static int clk_init_sdc(struct msm_clk_priv *priv, int slot, uint rate)
 	return rate;
 }
 
+static const struct bcr_regs uart1_regs = {
+	.cfg_rcgr = BLSP1_UART1_APPS_CFG_RCGR,
+	.cmd_rcgr = BLSP1_UART1_APPS_CMD_RCGR,
+	.M = BLSP1_UART1_APPS_M,
+	.N = BLSP1_UART1_APPS_N,
+	.D = BLSP1_UART1_APPS_D,
+};
+
+/* UART: 115200 */
+static int clk_init_uart1(struct msm_clk_priv *priv)
+{
+	/* Enable AHB clock */
+	clk_enable_vote_clk(priv->base, &gcc_blsp1_ahb_clk);
+
+	/* 7372800 uart block clock @ GPLL0 */
+	clk_rcg_set_rate_mnd(priv->base, &uart1_regs, 1, 144, 15625,
+			     CFG_CLK_SRC_GPLL0, 16);
+
+	/* Vote for gpll0 clock */
+	clk_enable_gpll0(priv->base, &gpll0_vote_clk);
+
+	/* Enable core clk */
+	clk_enable_cbc(priv->base + BLSP1_UART1_APPS_CBCR);
+
+	return 0;
+}
+
 static const struct bcr_regs uart2_regs = {
 	.cfg_rcgr = BLSP1_UART2_APPS_CFG_RCGR,
 	.cmd_rcgr = BLSP1_UART2_APPS_CMD_RCGR,
@@ -102,7 +137,7 @@ static const struct bcr_regs uart2_regs = {
 };
 
 /* UART: 115200 */
-static int clk_init_uart(struct msm_clk_priv *priv)
+static int clk_init_uart2(struct msm_clk_priv *priv)
 {
 	/* Enable AHB clock */
 	clk_enable_vote_clk(priv->base, &gcc_blsp1_ahb_clk);
@@ -127,13 +162,12 @@ static ulong apq8016_clk_set_rate(struct clk *clk, ulong rate)
 	switch (clk->id) {
 	case 0: /* SDC1 */
 		return clk_init_sdc(priv, 0, rate);
-		break;
 	case 1: /* SDC2 */
 		return clk_init_sdc(priv, 1, rate);
-		break;
 	case 4: /* UART2 */
-		return clk_init_uart(priv);
-		break;
+		return clk_init_uart2(priv);
+	case 5: /* UART1 */
+		return clk_init_uart1(priv);
 	default:
 		return 0;
 	}
-- 
2.34.1