diff options
Diffstat (limited to 'drivers/clk/clk-stm32f4.c')
| -rw-r--r-- | drivers/clk/clk-stm32f4.c | 173 |
1 files changed, 155 insertions, 18 deletions
diff --git a/drivers/clk/clk-stm32f4.c b/drivers/clk/clk-stm32f4.c index cbc814868508..5eb05dbf59b8 100644 --- a/drivers/clk/clk-stm32f4.c +++ b/drivers/clk/clk-stm32f4.c @@ -46,7 +46,7 @@ struct stm32f4_gate_data { unsigned long flags; }; -static const struct stm32f4_gate_data stm32f4_gates[] __initconst = { +static const struct stm32f4_gate_data stm32f429_gates[] __initconst = { { STM32F4_RCC_AHB1ENR, 0, "gpioa", "ahb_div" }, { STM32F4_RCC_AHB1ENR, 1, "gpiob", "ahb_div" }, { STM32F4_RCC_AHB1ENR, 2, "gpioc", "ahb_div" }, @@ -126,22 +126,108 @@ static const struct stm32f4_gate_data stm32f4_gates[] __initconst = { { STM32F4_RCC_APB2ENR, 26, "ltdc", "apb2_div" }, }; +static const struct stm32f4_gate_data stm32f469_gates[] __initconst = { + { STM32F4_RCC_AHB1ENR, 0, "gpioa", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 1, "gpiob", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 2, "gpioc", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 3, "gpiod", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 4, "gpioe", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 5, "gpiof", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 6, "gpiog", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 7, "gpioh", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 8, "gpioi", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 9, "gpioj", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 10, "gpiok", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 12, "crc", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 18, "bkpsra", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 20, "ccmdatam", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 21, "dma1", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 22, "dma2", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 23, "dma2d", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 25, "ethmac", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 26, "ethmactx", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 27, "ethmacrx", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 28, "ethmacptp", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 29, "otghs", "ahb_div" }, + { STM32F4_RCC_AHB1ENR, 30, "otghsulpi", "ahb_div" }, + + { STM32F4_RCC_AHB2ENR, 0, "dcmi", "ahb_div" }, + { STM32F4_RCC_AHB2ENR, 4, "cryp", "ahb_div" }, + { STM32F4_RCC_AHB2ENR, 5, "hash", "ahb_div" }, + { STM32F4_RCC_AHB2ENR, 6, "rng", "pll48" }, + { STM32F4_RCC_AHB2ENR, 7, "otgfs", "pll48" }, + + { STM32F4_RCC_AHB3ENR, 0, "fmc", "ahb_div", + CLK_IGNORE_UNUSED }, + { STM32F4_RCC_AHB3ENR, 1, "qspi", "ahb_div", + CLK_IGNORE_UNUSED }, + + { STM32F4_RCC_APB1ENR, 0, "tim2", "apb1_mul" }, + { STM32F4_RCC_APB1ENR, 1, "tim3", "apb1_mul" }, + { STM32F4_RCC_APB1ENR, 2, "tim4", "apb1_mul" }, + { STM32F4_RCC_APB1ENR, 3, "tim5", "apb1_mul" }, + { STM32F4_RCC_APB1ENR, 4, "tim6", "apb1_mul" }, + { STM32F4_RCC_APB1ENR, 5, "tim7", "apb1_mul" }, + { STM32F4_RCC_APB1ENR, 6, "tim12", "apb1_mul" }, + { STM32F4_RCC_APB1ENR, 7, "tim13", "apb1_mul" }, + { STM32F4_RCC_APB1ENR, 8, "tim14", "apb1_mul" }, + { STM32F4_RCC_APB1ENR, 11, "wwdg", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 14, "spi2", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 15, "spi3", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 17, "uart2", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 18, "uart3", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 19, "uart4", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 20, "uart5", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 21, "i2c1", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 22, "i2c2", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 23, "i2c3", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 25, "can1", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 26, "can2", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 28, "pwr", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 29, "dac", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 30, "uart7", "apb1_div" }, + { STM32F4_RCC_APB1ENR, 31, "uart8", "apb1_div" }, + + { STM32F4_RCC_APB2ENR, 0, "tim1", "apb2_mul" }, + { STM32F4_RCC_APB2ENR, 1, "tim8", "apb2_mul" }, + { STM32F4_RCC_APB2ENR, 4, "usart1", "apb2_div" }, + { STM32F4_RCC_APB2ENR, 5, "usart6", "apb2_div" }, + { STM32F4_RCC_APB2ENR, 8, "adc1", "apb2_div" }, + { STM32F4_RCC_APB2ENR, 9, "adc2", "apb2_div" }, + { STM32F4_RCC_APB2ENR, 10, "adc3", "apb2_div" }, + { STM32F4_RCC_APB2ENR, 11, "sdio", "pll48" }, + { STM32F4_RCC_APB2ENR, 12, "spi1", "apb2_div" }, + { STM32F4_RCC_APB2ENR, 13, "spi4", "apb2_div" }, + { STM32F4_RCC_APB2ENR, 14, "syscfg", "apb2_div" }, + { STM32F4_RCC_APB2ENR, 16, "tim9", "apb2_mul" }, + { STM32F4_RCC_APB2ENR, 17, "tim10", "apb2_mul" }, + { STM32F4_RCC_APB2ENR, 18, "tim11", "apb2_mul" }, + { STM32F4_RCC_APB2ENR, 20, "spi5", "apb2_div" }, + { STM32F4_RCC_APB2ENR, 21, "spi6", "apb2_div" }, + { STM32F4_RCC_APB2ENR, 22, "sai1", "apb2_div" }, + { STM32F4_RCC_APB2ENR, 26, "ltdc", "apb2_div" }, +}; + enum { SYSTICK, FCLK, CLK_LSI, CLK_LSE, CLK_HSE_RTC, CLK_RTC, END_PRIMARY_CLK }; -/* - * MAX_CLKS is the maximum value in the enumeration below plus the combined - * hweight of stm32f42xx_gate_map (plus one). - */ -#define MAX_CLKS (71 + END_PRIMARY_CLK + 1) /* * This bitmask tells us which bit offsets (0..192) on STM32F4[23]xxx * have gate bits associated with them. Its combined hweight is 71. */ -static const u64 stm32f42xx_gate_map[] = { 0x000000f17ef417ffull, - 0x0000000000000001ull, - 0x04777f33f6fec9ffull }; +#define MAX_GATE_MAP 3 + +static const u64 stm32f42xx_gate_map[MAX_GATE_MAP] = { 0x000000f17ef417ffull, + 0x0000000000000001ull, + 0x04777f33f6fec9ffull }; + +static const u64 stm32f46xx_gate_map[MAX_GATE_MAP] = { 0x000000f17ef417ffull, + 0x0000000000000003ull, + 0x0c777f33f6fec9ffull }; + +static const u64 *stm32f4_gate_map; + +static struct clk_hw **clks; -static struct clk_hw *clks[MAX_CLKS]; static DEFINE_SPINLOCK(stm32f4_clk_lock); static void __iomem *base; @@ -263,7 +349,7 @@ static void stm32f4_rcc_register_pll(const char *hse_clk, const char *hsi_clk) */ static int stm32f4_rcc_lookup_clk_idx(u8 primary, u8 secondary) { - u64 table[ARRAY_SIZE(stm32f42xx_gate_map)]; + u64 table[MAX_GATE_MAP]; if (primary == 1) { if (WARN_ON(secondary >= END_PRIMARY_CLK)) @@ -271,7 +357,7 @@ static int stm32f4_rcc_lookup_clk_idx(u8 primary, u8 secondary) return secondary; } - memcpy(table, stm32f42xx_gate_map, sizeof(table)); + memcpy(table, stm32f4_gate_map, sizeof(table)); /* only bits set in table can be used as indices */ if (WARN_ON(secondary >= BITS_PER_BYTE * sizeof(table) || @@ -525,10 +611,42 @@ static const char *rtc_parents[4] = { "no-clock", "lse", "lsi", "hse-rtc" }; +struct stm32f4_clk_data { + const struct stm32f4_gate_data *gates_data; + const u64 *gates_map; + int gates_num; +}; + +static const struct stm32f4_clk_data stm32f429_clk_data = { + .gates_data = stm32f429_gates, + .gates_map = stm32f42xx_gate_map, + .gates_num = ARRAY_SIZE(stm32f429_gates), +}; + +static const struct stm32f4_clk_data stm32f469_clk_data = { + .gates_data = stm32f469_gates, + .gates_map = stm32f46xx_gate_map, + .gates_num = ARRAY_SIZE(stm32f469_gates), +}; + +static const struct of_device_id stm32f4_of_match[] = { + { + .compatible = "st,stm32f42xx-rcc", + .data = &stm32f429_clk_data + }, + { + .compatible = "st,stm32f469-rcc", + .data = &stm32f469_clk_data + }, + {} +}; + static void __init stm32f4_rcc_init(struct device_node *np) { const char *hse_clk; int n; + const struct of_device_id *match; + const struct stm32f4_clk_data *data; base = of_iomap(np, 0); if (!base) { @@ -542,6 +660,19 @@ static void __init stm32f4_rcc_init(struct device_node *np) pr_warn("%s: Unable to get syscfg\n", __func__); } + match = of_match_node(stm32f4_of_match, np); + if (WARN_ON(!match)) + return; + + data = match->data; + + clks = kmalloc_array(data->gates_num + END_PRIMARY_CLK, + sizeof(*clks), GFP_KERNEL); + if (!clks) + goto fail; + + stm32f4_gate_map = data->gates_map; + hse_clk = of_clk_get_parent_name(np, 0); clk_register_fixed_rate_with_accuracy(NULL, "hsi", NULL, 0, @@ -574,11 +705,15 @@ static void __init stm32f4_rcc_init(struct device_node *np) clks[FCLK] = clk_hw_register_fixed_factor(NULL, "fclk", "ahb_div", 0, 1, 1); - for (n = 0; n < ARRAY_SIZE(stm32f4_gates); n++) { - const struct stm32f4_gate_data *gd = &stm32f4_gates[n]; - unsigned int secondary = - 8 * (gd->offset - STM32F4_RCC_AHB1ENR) + gd->bit_idx; - int idx = stm32f4_rcc_lookup_clk_idx(0, secondary); + for (n = 0; n < data->gates_num; n++) { + const struct stm32f4_gate_data *gd; + unsigned int secondary; + int idx; + + gd = &data->gates_data[n]; + secondary = 8 * (gd->offset - STM32F4_RCC_AHB1ENR) + + gd->bit_idx; + idx = stm32f4_rcc_lookup_clk_idx(0, secondary); if (idx < 0) goto fail; @@ -630,6 +765,8 @@ static void __init stm32f4_rcc_init(struct device_node *np) of_clk_add_hw_provider(np, stm32f4_rcc_lookup_clk, NULL); return; fail: + kfree(clks); iounmap(base); } -CLK_OF_DECLARE(stm32f4_rcc, "st,stm32f42xx-rcc", stm32f4_rcc_init); +CLK_OF_DECLARE(stm32f42xx_rcc, "st,stm32f42xx-rcc", stm32f4_rcc_init); +CLK_OF_DECLARE(stm32f46xx_rcc, "st,stm32f469-rcc", stm32f4_rcc_init); |