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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>
This commit is contained in:
Gabriel Fernandez 2018-03-08 17:54:00 +01:00 committed by Michael Turquette
parent a97703c59f
commit e51d297e9a
1 changed files with 85 additions and 0 deletions
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85
drivers/clk/clk-stm32mp1.c
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@ -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 {