diff options
author | Gabriel Fernandez <gabriel.fernandez@foss.st.com> | 2021-06-17 08:18:06 +0300 |
---|---|---|
committer | Stephen Boyd <sboyd@kernel.org> | 2021-06-28 04:31:52 +0300 |
commit | 9008fddee4be8797b2e7ab1747348176079fed25 (patch) | |
tree | 636a936573acdace7e3fc1c1578d06cc996895d9 /drivers/clk/clk-stm32mp1.c | |
parent | 152efe5662ea442085a20dd7993c472bed5b084c (diff) | |
download | linux-9008fddee4be8797b2e7ab1747348176079fed25.tar.xz |
clk: stm32mp1: remove intermediate pll clocks
This patch is to prepare STM32MP1 clocks in trusted mode.
Integrate the mux clock into pll clock will facilitate to have a more
coherent clock tree in no trusted / trusted mode.
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@foss.st.com>
Link: https://lore.kernel.org/r/20210617051814.12018-4-gabriel.fernandez@foss.st.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers/clk/clk-stm32mp1.c')
-rw-r--r-- | drivers/clk/clk-stm32mp1.c | 65 |
1 files changed, 42 insertions, 23 deletions
diff --git a/drivers/clk/clk-stm32mp1.c b/drivers/clk/clk-stm32mp1.c index a7c244fd0b03..24d99da07fc8 100644 --- a/drivers/clk/clk-stm32mp1.c +++ b/drivers/clk/clk-stm32mp1.c @@ -731,6 +731,7 @@ struct stm32_pll_obj { spinlock_t *lock; void __iomem *reg; struct clk_hw hw; + struct clk_mux mux; }; #define to_pll(_hw) container_of(_hw, struct stm32_pll_obj, hw) @@ -745,6 +746,8 @@ struct stm32_pll_obj { #define FRAC_MASK 0x1FFF #define FRAC_SHIFT 3 #define FRACLE BIT(16) +#define PLL_MUX_SHIFT 0 +#define PLL_MUX_MASK 3 static int __pll_is_enabled(struct clk_hw *hw) { @@ -856,16 +859,29 @@ static int pll_is_enabled(struct clk_hw *hw) return ret; } +static u8 pll_get_parent(struct clk_hw *hw) +{ + struct stm32_pll_obj *clk_elem = to_pll(hw); + struct clk_hw *mux_hw = &clk_elem->mux.hw; + + __clk_hw_set_clk(mux_hw, hw); + + return clk_mux_ops.get_parent(mux_hw); +} + static const struct clk_ops pll_ops = { .enable = pll_enable, .disable = pll_disable, .recalc_rate = pll_recalc_rate, .is_enabled = pll_is_enabled, + .get_parent = pll_get_parent, }; static struct clk_hw *clk_register_pll(struct device *dev, const char *name, - const char *parent_name, + const char * const *parent_names, + int num_parents, void __iomem *reg, + void __iomem *mux_reg, unsigned long flags, spinlock_t *lock) { @@ -881,8 +897,15 @@ static struct clk_hw *clk_register_pll(struct device *dev, const char *name, init.name = name; init.ops = &pll_ops; init.flags = flags; - init.parent_names = &parent_name; - init.num_parents = 1; + init.parent_names = parent_names; + init.num_parents = num_parents; + + element->mux.lock = lock; + element->mux.reg = mux_reg; + element->mux.shift = PLL_MUX_SHIFT; + element->mux.mask = PLL_MUX_MASK; + element->mux.flags = CLK_MUX_READ_ONLY; + element->mux.reg = mux_reg; element->hw.init = &init; element->reg = reg; @@ -1074,6 +1097,7 @@ static const struct clk_ops rtc_div_clk_ops = { struct stm32_pll_cfg { u32 offset; + u32 muxoff; }; static struct clk_hw *_clk_register_pll(struct device *dev, @@ -1083,8 +1107,11 @@ static struct clk_hw *_clk_register_pll(struct device *dev, { struct stm32_pll_cfg *stm_pll_cfg = cfg->cfg; - return clk_register_pll(dev, cfg->name, cfg->parent_name, - base + stm_pll_cfg->offset, cfg->flags, lock); + return clk_register_pll(dev, cfg->name, cfg->parent_names, + cfg->num_parents, + base + stm_pll_cfg->offset, + base + stm_pll_cfg->muxoff, + cfg->flags, lock); } struct stm32_cktim_cfg { @@ -1194,14 +1221,16 @@ _clk_stm32_register_composite(struct device *dev, .func = _clk_hw_register_mux,\ } -#define PLL(_id, _name, _parent, _flags, _offset)\ +#define PLL(_id, _name, _parents, _flags, _offset_p, _offset_mux)\ {\ .id = _id,\ .name = _name,\ - .parent_name = _parent,\ - .flags = _flags,\ + .parent_names = _parents,\ + .num_parents = ARRAY_SIZE(_parents),\ + .flags = CLK_IGNORE_UNUSED | (_flags),\ .cfg = &(struct stm32_pll_cfg) {\ - .offset = _offset,\ + .offset = _offset_p,\ + .muxoff = _offset_mux,\ },\ .func = _clk_register_pll,\ } @@ -1717,21 +1746,11 @@ static const struct clock_config stm32mp1_clock_cfg[] = { FIXED_FACTOR(CK_HSE_DIV2, "clk-hse-div2", "ck_hse", 0, 1, 2), - /* ref clock pll */ - MUX(NO_ID, "ref1", ref12_parents, CLK_OPS_PARENT_ENABLE, RCC_RCK12SELR, - 0, 2, CLK_MUX_READ_ONLY), - - MUX(NO_ID, "ref3", ref3_parents, CLK_OPS_PARENT_ENABLE, RCC_RCK3SELR, - 0, 2, CLK_MUX_READ_ONLY), - - MUX(NO_ID, "ref4", ref4_parents, CLK_OPS_PARENT_ENABLE, RCC_RCK4SELR, - 0, 2, CLK_MUX_READ_ONLY), - /* PLLs */ - PLL(PLL1, "pll1", "ref1", CLK_IGNORE_UNUSED, RCC_PLL1CR), - PLL(PLL2, "pll2", "ref1", CLK_IGNORE_UNUSED, RCC_PLL2CR), - PLL(PLL3, "pll3", "ref3", CLK_IGNORE_UNUSED, RCC_PLL3CR), - PLL(PLL4, "pll4", "ref4", CLK_IGNORE_UNUSED, RCC_PLL4CR), + PLL(PLL1, "pll1", ref12_parents, 0, RCC_PLL1CR, RCC_RCK12SELR), + PLL(PLL2, "pll2", ref12_parents, 0, RCC_PLL2CR, RCC_RCK12SELR), + PLL(PLL3, "pll3", ref3_parents, 0, RCC_PLL3CR, RCC_RCK3SELR), + PLL(PLL4, "pll4", ref4_parents, 0, RCC_PLL4CR, RCC_RCK4SELR), /* ODF */ COMPOSITE(PLL1_P, "pll1_p", PARENT("pll1"), 0, |