The PLL for the UART was not set, and relied on previous initializtion made by LK. add the appropriate initialization.
Signed-off-by: Ramon Fried ramon.fried@gmail.com ---
arch/arm/mach-snapdragon/clock-apq8096.c | 34 +++++++++++++++++++ .../include/mach/sysmap-apq8096.h | 9 +++++ 2 files changed, 43 insertions(+)
diff --git a/arch/arm/mach-snapdragon/clock-apq8096.c b/arch/arm/mach-snapdragon/clock-apq8096.c index 628c38785b..e5011be8f2 100644 --- a/arch/arm/mach-snapdragon/clock-apq8096.c +++ b/arch/arm/mach-snapdragon/clock-apq8096.c @@ -34,6 +34,12 @@ static const struct pll_vote_clk gpll0_vote_clk = { .vote_bit = APCS_GPLL_ENA_VOTE_GPLL0, };
+static struct vote_clk gcc_blsp2_ahb_clk = { + .cbcr_reg = BLSP2_AHB_CBCR, + .ena_vote = APCS_CLOCK_BRANCH_ENA_VOTE, + .vote_bit = BIT(15), +}; + static int clk_init_sdc(struct msm_clk_priv *priv, uint rate) { int div = 3; @@ -47,6 +53,32 @@ static int clk_init_sdc(struct msm_clk_priv *priv, uint rate) return rate; }
+static const struct bcr_regs uart2_regs = { + .cfg_rcgr = BLSP2_UART2_APPS_CFG_RCGR, + .cmd_rcgr = BLSP2_UART2_APPS_CMD_RCGR, + .M = BLSP2_UART2_APPS_M, + .N = BLSP2_UART2_APPS_N, + .D = BLSP2_UART2_APPS_D, +}; + +static int clk_init_uart(struct msm_clk_priv *priv) +{ + /* Enable AHB clock */ + clk_enable_vote_clk(priv->base, &gcc_blsp2_ahb_clk); + + /* 7372800 uart block clock @ GPLL0 */ + clk_rcg_set_rate_mnd(priv->base, &uart2_regs, 1, 192, 15625, + CFG_CLK_SRC_GPLL0); + + /* Vote for gpll0 clock */ + clk_enable_gpll0(priv->base, &gpll0_vote_clk); + + /* Enable core clk */ + clk_enable_cbc(priv->base + BLSP2_UART2_APPS_CBCR); + + return 0; +} + ulong msm_set_rate(struct clk *clk, ulong rate) { struct msm_clk_priv *priv = dev_get_priv(clk->dev); @@ -55,6 +87,8 @@ ulong msm_set_rate(struct clk *clk, ulong rate) case 0: /* SDC1 */ return clk_init_sdc(priv, rate); break; + case 4: /*UART2*/ + return clk_init_uart(priv); default: return 0; } diff --git a/arch/arm/mach-snapdragon/include/mach/sysmap-apq8096.h b/arch/arm/mach-snapdragon/include/mach/sysmap-apq8096.h index 14febb6487..36a902bd92 100644 --- a/arch/arm/mach-snapdragon/include/mach/sysmap-apq8096.h +++ b/arch/arm/mach-snapdragon/include/mach/sysmap-apq8096.h @@ -15,6 +15,7 @@ /* Clocks: (from CLK_CTL_BASE) */ #define GPLL0_STATUS (0x0000) #define APCS_GPLL_ENA_VOTE (0x52000) +#define APCS_CLOCK_BRANCH_ENA_VOTE (0x52004)
#define SDCC2_BCR (0x14000) /* block reset */ #define SDCC2_APPS_CBCR (0x14004) /* branch control */ @@ -25,4 +26,12 @@ #define SDCC2_N (0x1401C) #define SDCC2_D (0x14020)
+#define BLSP2_AHB_CBCR (0x25004) +#define BLSP2_UART2_APPS_CBCR (0x29004) +#define BLSP2_UART2_APPS_CMD_RCGR (0x2900C) +#define BLSP2_UART2_APPS_CFG_RCGR (0x29010) +#define BLSP2_UART2_APPS_M (0x29014) +#define BLSP2_UART2_APPS_N (0x29018) +#define BLSP2_UART2_APPS_D (0x2901C) + #endif