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| author | Gabriel Fernandez <gabriel.fernandez@st.com> | 2018-03-08 17:54:00 +0100 |
|---|---|---|
| committer | Michael Turquette <mturquette@baylibre.com> | 2018-03-11 23:40:33 +0100 |
| commit | e51d297e9a923556e45e5491f5dd29888e38889e (patch) | |
| tree | 85bf12724aaa350a919f8f83d7aecd93ad12f1d7 /drivers/clk/clk-stm32mp1.c | |
| parent | clk: stm32mp1: add Post-dividers for PLL (diff) | |
| download | linux-e51d297e9a923556e45e5491f5dd29888e38889e.tar.xz linux-e51d297e9a923556e45e5491f5dd29888e38889e.zip | |
clk: stm32mp1: add Sub System clocks
The RCC handles three sub-system clocks: ck_mpuss, ck_axiss
and ck_mcuss.
This patch adds also some MUX system and several prescalers.
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Diffstat (limited to 'drivers/clk/clk-stm32mp1.c')
| -rw-r--r-- | drivers/clk/clk-stm32mp1.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/drivers/clk/clk-stm32mp1.c b/drivers/clk/clk-stm32mp1.c index 3a99ad7f7048..77d96d9acad6 100644 --- a/drivers/clk/clk-stm32mp1.c +++ b/drivers/clk/clk-stm32mp1.c @@ -116,6 +116,42 @@ static const char * const ref4_parents[] = { "ck_hsi", "ck_hse", "ck_csi" }; +static const char * const cpu_src[] = { + "ck_hsi", "ck_hse", "pll1_p" +}; + +static const char * const axi_src[] = { + "ck_hsi", "ck_hse", "pll2_p", "pll3_p" +}; + +static const char * const per_src[] = { + "ck_hsi", "ck_csi", "ck_hse" +}; + +static const char * const mcu_src[] = { + "ck_hsi", "ck_hse", "ck_csi", "pll3_p" +}; + +static const struct clk_div_table axi_div_table[] = { + { 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 4 }, + { 4, 4 }, { 5, 4 }, { 6, 4 }, { 7, 4 }, + { 0 }, +}; + +static const struct clk_div_table mcu_div_table[] = { + { 0, 1 }, { 1, 2 }, { 2, 4 }, { 3, 8 }, + { 4, 16 }, { 5, 32 }, { 6, 64 }, { 7, 128 }, + { 8, 512 }, { 9, 512 }, { 10, 512}, { 11, 512 }, + { 12, 512 }, { 13, 512 }, { 14, 512}, { 15, 512 }, + { 0 }, +}; + +static const struct clk_div_table apb_div_table[] = { + { 0, 1 }, { 1, 2 }, { 2, 4 }, { 3, 8 }, + { 4, 16 }, { 5, 16 }, { 6, 16 }, { 7, 16 }, + { 0 }, +}; + struct clock_config { u32 id; const char *name; @@ -781,6 +817,21 @@ _clk_stm32_register_composite(struct device *dev, _STM32_DIV(_div_offset, _div_shift, _div_width,\ _div_flags, _div_table, NULL)\ +#define _STM32_MUX(_offset, _shift, _width, _mux_flags, _ops)\ + .mux = &(struct stm32_mux_cfg) {\ + &(struct mux_cfg) {\ + .reg_off = _offset,\ + .shift = _shift,\ + .width = _width,\ + .mux_flags = _mux_flags,\ + .table = NULL,\ + },\ + .ops = _ops,\ + } + +#define _MUX(_offset, _shift, _width, _mux_flags)\ + _STM32_MUX(_offset, _shift, _width, _mux_flags, NULL)\ + #define PARENT(_parent) ((const char *[]) { _parent}) #define _NO_MUX .mux = NULL @@ -882,6 +933,40 @@ static const struct clock_config stm32mp1_clock_cfg[] = { _GATE(RCC_PLL4CR, 6, 0), _NO_MUX, _DIV(RCC_PLL4CFGR2, 16, 7, 0, NULL)), + + /* MUX system clocks */ + MUX(CK_PER, "ck_per", per_src, CLK_OPS_PARENT_ENABLE, + RCC_CPERCKSELR, 0, 2, 0), + + MUX(CK_MPU, "ck_mpu", cpu_src, CLK_OPS_PARENT_ENABLE | + CLK_IS_CRITICAL, RCC_MPCKSELR, 0, 2, 0), + + COMPOSITE(CK_AXI, "ck_axi", axi_src, CLK_IS_CRITICAL | + CLK_OPS_PARENT_ENABLE, + _NO_GATE, + _MUX(RCC_ASSCKSELR, 0, 2, 0), + _DIV(RCC_AXIDIVR, 0, 3, 0, axi_div_table)), + + COMPOSITE(CK_MCU, "ck_mcu", mcu_src, CLK_IS_CRITICAL | + CLK_OPS_PARENT_ENABLE, + _NO_GATE, + _MUX(RCC_MSSCKSELR, 0, 2, 0), + _DIV(RCC_MCUDIVR, 0, 4, 0, mcu_div_table)), + + DIV_TABLE(NO_ID, "pclk1", "ck_mcu", CLK_IGNORE_UNUSED, RCC_APB1DIVR, 0, + 3, CLK_DIVIDER_READ_ONLY, apb_div_table), + + DIV_TABLE(NO_ID, "pclk2", "ck_mcu", CLK_IGNORE_UNUSED, RCC_APB2DIVR, 0, + 3, CLK_DIVIDER_READ_ONLY, apb_div_table), + + DIV_TABLE(NO_ID, "pclk3", "ck_mcu", CLK_IGNORE_UNUSED, RCC_APB3DIVR, 0, + 3, CLK_DIVIDER_READ_ONLY, apb_div_table), + + DIV_TABLE(NO_ID, "pclk4", "ck_axi", CLK_IGNORE_UNUSED, RCC_APB4DIVR, 0, + 3, CLK_DIVIDER_READ_ONLY, apb_div_table), + + DIV_TABLE(NO_ID, "pclk5", "ck_axi", CLK_IGNORE_UNUSED, RCC_APB5DIVR, 0, + 3, CLK_DIVIDER_READ_ONLY, apb_div_table), }; struct stm32_clock_match_data { |