| Message ID | 20240311111027.44577-3-sumit.garg@linaro.org |
|---|---|
| State | Superseded |
| Delegated to: | Caleb Connolly |
| Headers | show |
| Series | Add SE HMBSC board support | expand |
Hi Sumit, On 11/03/2024 11:10, Sumit Garg wrote: > 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. > > Signed-off-by: Sumit Garg <sumit.garg@linaro.org> > --- > drivers/clk/qcom/clock-apq8016.c | 50 +++++++++++++++++++++----- > drivers/pinctrl/qcom/pinctrl-apq8016.c | 1 + > drivers/serial/serial_msm.c | 6 ++-- > 3 files changed, 47 insertions(+), 10 deletions(-) > > diff --git a/drivers/clk/qcom/clock-apq8016.c b/drivers/clk/qcom/clock-apq8016.c > index e6647f7c41d..a620a10a520 100644 > --- a/drivers/clk/qcom/clock-apq8016.c > +++ b/drivers/clk/qcom/clock-apq8016.c > @@ -43,6 +43,14 @@ > #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) > > @@ -77,7 +85,7 @@ 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) This seems like an unrelated change, I don't think we need to namespace this function as it's static. > { > int div = 15; /* 100MHz default */ > > @@ -94,6 +102,33 @@ 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 apq8016_clk_init_uart1(phys_addr_t base) I know we're still dealing with some tech debt here, but I'm not a big fan of this approach. I notice that the RCG and CBCR registers are all offset by exactly 0xff0 between UART1 and UART2, what about adding a second "index" parameter to apq8016_clk_init_uart() and then offsetting the addresses by (0xff0 * index)? This will get cleaner once we drop the bcr_regs struct. > +{ > + /* Enable AHB clock */ > + clk_enable_vote_clk(base, &gcc_blsp1_ahb_clk); > + > + /* 7372800 uart block clock @ GPLL0 */ > + clk_rcg_set_rate_mnd(base, &uart1_regs, 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_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, > @@ -103,7 +138,7 @@ static const struct bcr_regs uart2_regs = { > }; > > /* UART: 115200 */ > -int apq8016_clk_init_uart(phys_addr_t base) > +int apq8016_clk_init_uart2(phys_addr_t base) > { > /* Enable AHB clock */ > clk_enable_vote_clk(base, &gcc_blsp1_ahb_clk); > @@ -127,14 +162,13 @@ 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_UART2_APPS_CLK: /* UART2 */ > - return apq8016_clk_init_uart(priv->base); > - break; > + return apq8016_clk_init_uart2(priv->base); > + case GCC_BLSP1_UART1_APPS_CLK: /* UART1 */ > + return apq8016_clk_init_uart1(priv->base); > default: > return 0; > } > diff --git a/drivers/pinctrl/qcom/pinctrl-apq8016.c b/drivers/pinctrl/qcom/pinctrl-apq8016.c > index db0e2124684..cb0e2227079 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..eaf024a55b0 100644 > --- a/drivers/serial/serial_msm.c > +++ b/drivers/serial/serial_msm.c > @@ -248,12 +248,14 @@ 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 */ Please update the comment to offer some hints about which UART should be enabled. > -//int apq8016_clk_init_uart(phys_addr_t gcc_base); > +//int apq8016_clk_init_uart1(phys_addr_t gcc_base); > +//int apq8016_clk_init_uart2(phys_addr_t gcc_base); > > 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); > + //apq8016_clk_init_uart1(0x1800000); > + //apq8016_clk_init_uart2(0x1800000); > uart_dm_init(&init_serial_data); > } >
On Mon, Mar 11, 2024 at 12:27:11PM +0000, Caleb Connolly wrote: > On 11/03/2024 11:10, Sumit Garg wrote: > > 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. > > > > Signed-off-by: Sumit Garg <sumit.garg@linaro.org> > > --- > > drivers/clk/qcom/clock-apq8016.c | 50 +++++++++++++++++++++----- > > drivers/pinctrl/qcom/pinctrl-apq8016.c | 1 + > > drivers/serial/serial_msm.c | 6 ++-- > > 3 files changed, 47 insertions(+), 10 deletions(-) > > > > diff --git a/drivers/clk/qcom/clock-apq8016.c b/drivers/clk/qcom/clock-apq8016.c > > index e6647f7c41d..a620a10a520 100644 > > --- a/drivers/clk/qcom/clock-apq8016.c > > +++ b/drivers/clk/qcom/clock-apq8016.c > > @@ -43,6 +43,14 @@ > > #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) > > > > [...] > > @@ -94,6 +102,33 @@ 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 apq8016_clk_init_uart1(phys_addr_t base) > > I know we're still dealing with some tech debt here, but I'm not a big > fan of this approach. I notice that the RCG and CBCR registers are all > offset by exactly 0xff0 between UART1 and UART2, what about adding a > second "index" parameter to apq8016_clk_init_uart() and then offsetting > the addresses by (0xff0 * index)? > This would work for MSM8916 where you have just two UARTs, but it might be misleading since the UART blocks are actually separated in 4 KiB (0x1000) blocks and not offset by 0xff0. UART2 is a special case that has different offsets within the 4 KiB block, for some weird reason. If you want to calculate the register offsets properly you would need special handling for UART2, e.g. I have the following (admittedly rather ugly) define in the TF-A port for MSM8916 and similar [1]: #define GCC_BLSP1_UART_APPS_CBCR(n) (GCC_BASE + \ (((n) == 2) ? (0x0302c) : (0x0203c + (((n) - 1) * 0x1000)))) where n is the UART number (here 1 or 2). As a different example, MDM9607 has 5 UARTs (1 to 5) and there only UART2 is special-cased, while all others follow the standard offset with 0x1000 offset. Thanks, Stephan [1]: https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/tree/plat/qti/msm8916/msm8916_setup.c?h=v2.10#n40
On 11/03/2024 13:32, Stephan Gerhold wrote: > On Mon, Mar 11, 2024 at 12:27:11PM +0000, Caleb Connolly wrote: >> On 11/03/2024 11:10, Sumit Garg wrote: >>> 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. >>> >>> Signed-off-by: Sumit Garg <sumit.garg@linaro.org> >>> --- >>> drivers/clk/qcom/clock-apq8016.c | 50 +++++++++++++++++++++----- >>> drivers/pinctrl/qcom/pinctrl-apq8016.c | 1 + >>> drivers/serial/serial_msm.c | 6 ++-- >>> 3 files changed, 47 insertions(+), 10 deletions(-) >>> >>> diff --git a/drivers/clk/qcom/clock-apq8016.c b/drivers/clk/qcom/clock-apq8016.c >>> index e6647f7c41d..a620a10a520 100644 >>> --- a/drivers/clk/qcom/clock-apq8016.c >>> +++ b/drivers/clk/qcom/clock-apq8016.c >>> @@ -43,6 +43,14 @@ >>> #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) >>> >>> [...] >>> @@ -94,6 +102,33 @@ 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 apq8016_clk_init_uart1(phys_addr_t base) >> >> I know we're still dealing with some tech debt here, but I'm not a big >> fan of this approach. I notice that the RCG and CBCR registers are all >> offset by exactly 0xff0 between UART1 and UART2, what about adding a >> second "index" parameter to apq8016_clk_init_uart() and then offsetting >> the addresses by (0xff0 * index)? >> > > This would work for MSM8916 where you have just two UARTs, but it might > be misleading since the UART blocks are actually separated in 4 KiB > (0x1000) blocks and not offset by 0xff0. UART2 is a special case that > has different offsets within the 4 KiB block, for some weird reason. > > If you want to calculate the register offsets properly you would need > special handling for UART2, e.g. I have the following (admittedly rather > ugly) define in the TF-A port for MSM8916 and similar [1]: > > #define GCC_BLSP1_UART_APPS_CBCR(n) (GCC_BASE + \ > (((n) == 2) ? (0x0302c) : (0x0203c + (((n) - 1) * 0x1000)))) > > where n is the UART number (here 1 or 2). As a different example, > MDM9607 has 5 UARTs (1 to 5) and there only UART2 is special-cased, > while all others follow the standard offset with 0x1000 offset. fwiw I would also be fine with just treating it like a binary switch and only allowing UART1 or UART2 to be selected if that's simpler. > > Thanks, > Stephan > > [1]: https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/tree/plat/qti/msm8916/msm8916_setup.c?h=v2.10#n40
On Mon, 11 Mar 2024 at 20:20, Caleb Connolly <caleb.connolly@linaro.org> wrote: > > > > On 11/03/2024 13:32, Stephan Gerhold wrote: > > On Mon, Mar 11, 2024 at 12:27:11PM +0000, Caleb Connolly wrote: > >> On 11/03/2024 11:10, Sumit Garg wrote: > >>> 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. > >>> > >>> Signed-off-by: Sumit Garg <sumit.garg@linaro.org> > >>> --- > >>> drivers/clk/qcom/clock-apq8016.c | 50 +++++++++++++++++++++----- > >>> drivers/pinctrl/qcom/pinctrl-apq8016.c | 1 + > >>> drivers/serial/serial_msm.c | 6 ++-- > >>> 3 files changed, 47 insertions(+), 10 deletions(-) > >>> > >>> diff --git a/drivers/clk/qcom/clock-apq8016.c b/drivers/clk/qcom/clock-apq8016.c > >>> index e6647f7c41d..a620a10a520 100644 > >>> --- a/drivers/clk/qcom/clock-apq8016.c > >>> +++ b/drivers/clk/qcom/clock-apq8016.c > >>> @@ -43,6 +43,14 @@ > >>> #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) > >>> > >>> [...] > >>> @@ -94,6 +102,33 @@ 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 apq8016_clk_init_uart1(phys_addr_t base) > >> > >> I know we're still dealing with some tech debt here, but I'm not a big > >> fan of this approach. I notice that the RCG and CBCR registers are all > >> offset by exactly 0xff0 between UART1 and UART2, what about adding a > >> second "index" parameter to apq8016_clk_init_uart() and then offsetting > >> the addresses by (0xff0 * index)? > >> > > > > This would work for MSM8916 where you have just two UARTs, but it might > > be misleading since the UART blocks are actually separated in 4 KiB > > (0x1000) blocks and not offset by 0xff0. UART2 is a special case that > > has different offsets within the 4 KiB block, for some weird reason. > > > > If you want to calculate the register offsets properly you would need > > special handling for UART2, e.g. I have the following (admittedly rather > > ugly) define in the TF-A port for MSM8916 and similar [1]: > > > > #define GCC_BLSP1_UART_APPS_CBCR(n) (GCC_BASE + \ > > (((n) == 2) ? (0x0302c) : (0x0203c + (((n) - 1) * 0x1000)))) > > > > where n is the UART number (here 1 or 2). As a different example, > > MDM9607 has 5 UARTs (1 to 5) and there only UART2 is special-cased, > > while all others follow the standard offset with 0x1000 offset. > > fwiw I would also be fine with just treating it like a binary switch and > only allowing UART1 or UART2 to be selected if that's simpler. Let me rather pass GCC_BLSP1_UART1_APPS_CLK/GCC_BLSP1_UART2_APPS_CLK as an argument to the apq8016_clk_init_uart(). -Sumit > > > > Thanks, > > Stephan > > > > [1]: https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/tree/plat/qti/msm8916/msm8916_setup.c?h=v2.10#n40 > > -- > // Caleb (they/them)
On Mon, 11 Mar 2024 at 17:57, Caleb Connolly <caleb.connolly@linaro.org> wrote: > > Hi Sumit, > > On 11/03/2024 11:10, Sumit Garg wrote: > > 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. > > > > Signed-off-by: Sumit Garg <sumit.garg@linaro.org> > > --- > > drivers/clk/qcom/clock-apq8016.c | 50 +++++++++++++++++++++----- > > drivers/pinctrl/qcom/pinctrl-apq8016.c | 1 + > > drivers/serial/serial_msm.c | 6 ++-- > > 3 files changed, 47 insertions(+), 10 deletions(-) > > > > diff --git a/drivers/clk/qcom/clock-apq8016.c b/drivers/clk/qcom/clock-apq8016.c > > index e6647f7c41d..a620a10a520 100644 > > --- a/drivers/clk/qcom/clock-apq8016.c > > +++ b/drivers/clk/qcom/clock-apq8016.c > > @@ -43,6 +43,14 @@ > > #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) > > > > @@ -77,7 +85,7 @@ 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) > This seems like an unrelated change, I don't think we need to namespace > this function as it's static. We should follow the same naming convention within a driver to avoid confusion. [snip] > > diff --git a/drivers/serial/serial_msm.c b/drivers/serial/serial_msm.c > > index ac4280c6c4c..eaf024a55b0 100644 > > --- a/drivers/serial/serial_msm.c > > +++ b/drivers/serial/serial_msm.c > > @@ -248,12 +248,14 @@ 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 */ > Please update the comment to offer some hints about which UART should be > enabled. Okay I can add a hint for UART to be board specific. -Sumit > > -//int apq8016_clk_init_uart(phys_addr_t gcc_base); > > +//int apq8016_clk_init_uart1(phys_addr_t gcc_base); > > +//int apq8016_clk_init_uart2(phys_addr_t gcc_base); > > > > 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); > > + //apq8016_clk_init_uart1(0x1800000); > > + //apq8016_clk_init_uart2(0x1800000); > > uart_dm_init(&init_serial_data); > > } > > > > -- > // Caleb (they/them)
diff --git a/drivers/clk/qcom/clock-apq8016.c b/drivers/clk/qcom/clock-apq8016.c index e6647f7c41d..a620a10a520 100644 --- a/drivers/clk/qcom/clock-apq8016.c +++ b/drivers/clk/qcom/clock-apq8016.c @@ -43,6 +43,14 @@ #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) @@ -77,7 +85,7 @@ 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 */ @@ -94,6 +102,33 @@ 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 apq8016_clk_init_uart1(phys_addr_t base) +{ + /* Enable AHB clock */ + clk_enable_vote_clk(base, &gcc_blsp1_ahb_clk); + + /* 7372800 uart block clock @ GPLL0 */ + clk_rcg_set_rate_mnd(base, &uart1_regs, 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_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, @@ -103,7 +138,7 @@ static const struct bcr_regs uart2_regs = { }; /* UART: 115200 */ -int apq8016_clk_init_uart(phys_addr_t base) +int apq8016_clk_init_uart2(phys_addr_t base) { /* Enable AHB clock */ clk_enable_vote_clk(base, &gcc_blsp1_ahb_clk); @@ -127,14 +162,13 @@ 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_UART2_APPS_CLK: /* UART2 */ - return apq8016_clk_init_uart(priv->base); - break; + return apq8016_clk_init_uart2(priv->base); + case GCC_BLSP1_UART1_APPS_CLK: /* UART1 */ + return apq8016_clk_init_uart1(priv->base); default: return 0; } diff --git a/drivers/pinctrl/qcom/pinctrl-apq8016.c b/drivers/pinctrl/qcom/pinctrl-apq8016.c index db0e2124684..cb0e2227079 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..eaf024a55b0 100644 --- a/drivers/serial/serial_msm.c +++ b/drivers/serial/serial_msm.c @@ -248,12 +248,14 @@ 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_uart1(phys_addr_t gcc_base); +//int apq8016_clk_init_uart2(phys_addr_t gcc_base); 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); + //apq8016_clk_init_uart1(0x1800000); + //apq8016_clk_init_uart2(0x1800000); uart_dm_init(&init_serial_data); }
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. Signed-off-by: Sumit Garg <sumit.garg@linaro.org> --- drivers/clk/qcom/clock-apq8016.c | 50 +++++++++++++++++++++----- drivers/pinctrl/qcom/pinctrl-apq8016.c | 1 + drivers/serial/serial_msm.c | 6 ++-- 3 files changed, 47 insertions(+), 10 deletions(-)