SE HMIBSC board uses UART1 as the main debug console, so add corresponding clocks and pinmux support. Along with that update instructions to enable clocks for debug UART support.
Reviewed-by: Caleb Connolly caleb.connolly@linaro.org Signed-off-by: Sumit Garg sumit.garg@linaro.org --- drivers/clk/qcom/clock-apq8016.c | 38 ++++++++++++++++++-------- drivers/pinctrl/qcom/pinctrl-apq8016.c | 1 + drivers/serial/serial_msm.c | 11 ++++++-- 3 files changed, 35 insertions(+), 15 deletions(-)
diff --git a/drivers/clk/qcom/clock-apq8016.c b/drivers/clk/qcom/clock-apq8016.c index 5a5868169c8..9556b94774a 100644 --- a/drivers/clk/qcom/clock-apq8016.c +++ b/drivers/clk/qcom/clock-apq8016.c @@ -31,7 +31,8 @@ #define BLSP1_AHB_CBCR 0x1008
/* Uart clock control registers */ -#define BLSP1_UART2_BCR (0x3028) +#define BLSP1_UART1_APPS_CBCR (0x203C) +#define BLSP1_UART1_APPS_CMD_RCGR (0x2044) #define BLSP1_UART2_APPS_CBCR (0x302C) #define BLSP1_UART2_APPS_CMD_RCGR (0x3034)
@@ -52,7 +53,7 @@ static struct vote_clk gcc_blsp1_ahb_clk = { };
/* SDHCI */ -static int clk_init_sdc(struct msm_clk_priv *priv, int slot, uint rate) +static int apq8016_clk_init_sdc(struct msm_clk_priv *priv, int slot, uint rate) { int div = 15; /* 100MHz default */
@@ -70,20 +71,35 @@ static int clk_init_sdc(struct msm_clk_priv *priv, int slot, uint rate) }
/* UART: 115200 */ -int apq8016_clk_init_uart(phys_addr_t base) +int apq8016_clk_init_uart(phys_addr_t base, unsigned long id) { + u32 cmd_rcgr, apps_cbcr; + + switch (id) { + case GCC_BLSP1_UART1_APPS_CLK: + cmd_rcgr = BLSP1_UART1_APPS_CMD_RCGR; + apps_cbcr = BLSP1_UART1_APPS_CBCR; + break; + case GCC_BLSP1_UART2_APPS_CLK: + cmd_rcgr = BLSP1_UART2_APPS_CMD_RCGR; + apps_cbcr = BLSP1_UART2_APPS_CBCR; + break; + default: + return 0; + } + /* Enable AHB clock */ clk_enable_vote_clk(base, &gcc_blsp1_ahb_clk);
/* 7372800 uart block clock @ GPLL0 */ - clk_rcg_set_rate_mnd(base, BLSP1_UART2_APPS_CMD_RCGR, 1, 144, 15625, - CFG_CLK_SRC_GPLL0, 16); + clk_rcg_set_rate_mnd(base, cmd_rcgr, 1, 144, 15625, CFG_CLK_SRC_GPLL0, + 16);
/* Vote for gpll0 clock */ clk_enable_gpll0(base, &gpll0_vote_clk);
/* Enable core clk */ - clk_enable_cbc(base + BLSP1_UART2_APPS_CBCR); + clk_enable_cbc(base + apps_cbcr);
return 0; } @@ -94,14 +110,12 @@ static ulong apq8016_clk_set_rate(struct clk *clk, ulong rate)
switch (clk->id) { case GCC_SDCC1_APPS_CLK: /* SDC1 */ - return clk_init_sdc(priv, 0, rate); - break; + return apq8016_clk_init_sdc(priv, 0, rate); case GCC_SDCC2_APPS_CLK: /* SDC2 */ - return clk_init_sdc(priv, 1, rate); - break; + return apq8016_clk_init_sdc(priv, 1, rate); + case GCC_BLSP1_UART1_APPS_CLK: /* UART1 */ case GCC_BLSP1_UART2_APPS_CLK: /* UART2 */ - return apq8016_clk_init_uart(priv->base); - break; + return apq8016_clk_init_uart(priv->base, clk->id); default: return 0; } diff --git a/drivers/pinctrl/qcom/pinctrl-apq8016.c b/drivers/pinctrl/qcom/pinctrl-apq8016.c index a9a00f4b081..1ee8b7db1a2 100644 --- a/drivers/pinctrl/qcom/pinctrl-apq8016.c +++ b/drivers/pinctrl/qcom/pinctrl-apq8016.c @@ -29,6 +29,7 @@ static const char * const msm_pinctrl_pins[] = { };
static const struct pinctrl_function msm_pinctrl_functions[] = { + {"blsp_uart1", 2}, {"blsp_uart2", 2}, };
diff --git a/drivers/serial/serial_msm.c b/drivers/serial/serial_msm.c index ac4280c6c4c..4de10e75191 100644 --- a/drivers/serial/serial_msm.c +++ b/drivers/serial/serial_msm.c @@ -248,12 +248,17 @@ static struct msm_serial_data init_serial_data = { #include <debug_uart.h>
/* Uncomment to turn on UART clocks when debugging U-Boot as aboot on MSM8916 */ -//int apq8016_clk_init_uart(phys_addr_t gcc_base); +//int apq8016_clk_init_uart(phys_addr_t gcc_base, unsigned long id);
static inline void _debug_uart_init(void) { - /* Uncomment to turn on UART clocks when debugging U-Boot as aboot on MSM8916 */ - //apq8016_clk_init_uart(0x1800000); + /* + * Uncomment to turn on UART clocks when debugging U-Boot as aboot + * on MSM8916. Supported debug UART clock IDs: + * - db410c: GCC_BLSP1_UART2_APPS_CLK + * - HMIBSC: GCC_BLSP1_UART1_APPS_CLK + */ + //apq8016_clk_init_uart(0x1800000, <uart_clk_id>); uart_dm_init(&init_serial_data); }