diff options
Diffstat (limited to 'drivers/clk/mvebu')
| -rw-r--r-- | drivers/clk/mvebu/ap-cpu-clk.c | 82 |
1 files changed, 62 insertions, 20 deletions
diff --git a/drivers/clk/mvebu/ap-cpu-clk.c b/drivers/clk/mvebu/ap-cpu-clk.c index e4cecb456884..784104f6793b 100644 --- a/drivers/clk/mvebu/ap-cpu-clk.c +++ b/drivers/clk/mvebu/ap-cpu-clk.c @@ -15,6 +15,7 @@ #include <linux/mfd/syscon.h> #include <linux/of.h> #include <linux/of_address.h> +#include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include "armada_ap_cp_helper.h" @@ -29,6 +30,26 @@ #define APN806_MAX_DIVIDER 32 +/** + * struct cpu_dfs_regs: CPU DFS register mapping + * @divider_reg: full integer ratio from PLL frequency to CPU clock frequency + * @force_reg: request to force new ratio regardless of relation to other clocks + * @ratio_reg: central request to switch ratios + */ +struct cpu_dfs_regs { + unsigned int divider_reg; + unsigned int force_reg; + unsigned int ratio_reg; + unsigned int ratio_state_reg; + unsigned int divider_mask; + unsigned int cluster_offset; + unsigned int force_mask; + int divider_offset; + int ratio_offset; + int ratio_state_offset; + int ratio_state_cluster_offset; +}; + /* AP806 CPU DFS register mapping*/ #define AP806_CA72MP2_0_PLL_CR_0_REG_OFFSET 0x278 #define AP806_CA72MP2_0_PLL_CR_1_REG_OFFSET 0x280 @@ -43,6 +64,7 @@ #define AP806_PLL_CR_0_CPU_CLK_RELOAD_FORCE_MASK \ (0x1 << AP806_PLL_CR_0_CPU_CLK_RELOAD_FORCE_OFFSET) #define AP806_PLL_CR_0_CPU_CLK_RELOAD_RATIO_OFFSET 16 +#define AP806_CA72MP2_0_PLL_RATIO_STABLE_OFFSET 0 #define AP806_CA72MP2_0_PLL_RATIO_STATE 11 #define STATUS_POLL_PERIOD_US 1 @@ -50,6 +72,20 @@ #define to_ap_cpu_clk(_hw) container_of(_hw, struct ap_cpu_clk, hw) +static const struct cpu_dfs_regs ap806_dfs_regs = { + .divider_reg = AP806_CA72MP2_0_PLL_CR_0_REG_OFFSET, + .force_reg = AP806_CA72MP2_0_PLL_CR_1_REG_OFFSET, + .ratio_reg = AP806_CA72MP2_0_PLL_CR_2_REG_OFFSET, + .ratio_state_reg = AP806_CA72MP2_0_PLL_SR_REG_OFFSET, + .divider_mask = AP806_PLL_CR_0_CPU_CLK_DIV_RATIO_MASK, + .cluster_offset = AP806_CA72MP2_0_PLL_CR_CLUSTER_OFFSET, + .force_mask = AP806_PLL_CR_0_CPU_CLK_RELOAD_FORCE_MASK, + .divider_offset = AP806_PLL_CR_0_CPU_CLK_DIV_RATIO_OFFSET, + .ratio_offset = AP806_PLL_CR_0_CPU_CLK_RELOAD_RATIO_OFFSET, + .ratio_state_offset = AP806_CA72MP2_0_PLL_RATIO_STABLE_OFFSET, + .ratio_state_cluster_offset = AP806_CA72MP2_0_PLL_RATIO_STABLE_OFFSET, +}; + /* * struct ap806_clk: CPU cluster clock controller instance * @cluster: Cluster clock controller index @@ -64,6 +100,7 @@ struct ap_cpu_clk { struct device *dev; struct clk_hw hw; struct regmap *pll_cr_base; + const struct cpu_dfs_regs *pll_regs; }; static unsigned long ap_cpu_clk_recalc_rate(struct clk_hw *hw, @@ -73,11 +110,11 @@ static unsigned long ap_cpu_clk_recalc_rate(struct clk_hw *hw, unsigned int cpu_clkdiv_reg; int cpu_clkdiv_ratio; - cpu_clkdiv_reg = AP806_CA72MP2_0_PLL_CR_0_REG_OFFSET + - (clk->cluster * AP806_CA72MP2_0_PLL_CR_CLUSTER_OFFSET); + cpu_clkdiv_reg = clk->pll_regs->divider_reg + + (clk->cluster * clk->pll_regs->cluster_offset); regmap_read(clk->pll_cr_base, cpu_clkdiv_reg, &cpu_clkdiv_ratio); - cpu_clkdiv_ratio &= AP806_PLL_CR_0_CPU_CLK_DIV_RATIO_MASK; - cpu_clkdiv_ratio >>= AP806_PLL_CR_0_CPU_CLK_DIV_RATIO_OFFSET; + cpu_clkdiv_ratio &= clk->pll_regs->divider_mask; + cpu_clkdiv_ratio >>= clk->pll_regs->divider_offset; return parent_rate / cpu_clkdiv_ratio; } @@ -89,35 +126,36 @@ static int ap_cpu_clk_set_rate(struct clk_hw *hw, unsigned long rate, int ret, reg, divider = parent_rate / rate; unsigned int cpu_clkdiv_reg, cpu_force_reg, cpu_ratio_reg, stable_bit; - cpu_clkdiv_reg = AP806_CA72MP2_0_PLL_CR_0_REG_OFFSET + - (clk->cluster * AP806_CA72MP2_0_PLL_CR_CLUSTER_OFFSET); - cpu_force_reg = AP806_CA72MP2_0_PLL_CR_1_REG_OFFSET + - (clk->cluster * AP806_CA72MP2_0_PLL_CR_CLUSTER_OFFSET); - cpu_ratio_reg = AP806_CA72MP2_0_PLL_CR_2_REG_OFFSET + - (clk->cluster * AP806_CA72MP2_0_PLL_CR_CLUSTER_OFFSET); + cpu_clkdiv_reg = clk->pll_regs->divider_reg + + (clk->cluster * clk->pll_regs->cluster_offset); + cpu_force_reg = clk->pll_regs->force_reg + + (clk->cluster * clk->pll_regs->cluster_offset); + cpu_ratio_reg = clk->pll_regs->ratio_reg + + (clk->cluster * clk->pll_regs->cluster_offset); regmap_update_bits(clk->pll_cr_base, cpu_clkdiv_reg, - AP806_PLL_CR_0_CPU_CLK_DIV_RATIO_MASK, divider); + clk->pll_regs->divider_mask, divider); regmap_update_bits(clk->pll_cr_base, cpu_force_reg, - AP806_PLL_CR_0_CPU_CLK_RELOAD_FORCE_MASK, - AP806_PLL_CR_0_CPU_CLK_RELOAD_FORCE_MASK); + clk->pll_regs->force_mask, + clk->pll_regs->force_mask); regmap_update_bits(clk->pll_cr_base, cpu_ratio_reg, - BIT(AP806_PLL_CR_0_CPU_CLK_RELOAD_RATIO_OFFSET), - BIT(AP806_PLL_CR_0_CPU_CLK_RELOAD_RATIO_OFFSET)); - - stable_bit = BIT(clk->cluster * AP806_CA72MP2_0_PLL_RATIO_STATE), + BIT(clk->pll_regs->ratio_offset), + BIT(clk->pll_regs->ratio_offset)); + stable_bit = BIT(clk->pll_regs->ratio_state_offset + + clk->cluster * + clk->pll_regs->ratio_state_cluster_offset), ret = regmap_read_poll_timeout(clk->pll_cr_base, - AP806_CA72MP2_0_PLL_SR_REG_OFFSET, reg, + clk->pll_regs->ratio_state_reg, reg, reg & stable_bit, STATUS_POLL_PERIOD_US, STATUS_POLL_TIMEOUT_US); if (ret) return ret; regmap_update_bits(clk->pll_cr_base, cpu_ratio_reg, - BIT(AP806_PLL_CR_0_CPU_CLK_RELOAD_RATIO_OFFSET), 0); + BIT(clk->pll_regs->ratio_offset), 0); return 0; } @@ -222,6 +260,7 @@ static int ap_cpu_clock_probe(struct platform_device *pdev) ap_cpu_clk[cluster_index].pll_cr_base = regmap; ap_cpu_clk[cluster_index].hw.init = &init; ap_cpu_clk[cluster_index].dev = dev; + ap_cpu_clk[cluster_index].pll_regs = of_device_get_match_data(&pdev->dev); init.name = ap_cpu_clk[cluster_index].clk_name; init.ops = &ap_cpu_clk_ops; @@ -244,7 +283,10 @@ static int ap_cpu_clock_probe(struct platform_device *pdev) } static const struct of_device_id ap_cpu_clock_of_match[] = { - { .compatible = "marvell,ap806-cpu-clock", }, + { + .compatible = "marvell,ap806-cpu-clock", + .data = &ap806_dfs_regs, + }, { } }; |