From: Gabriel Fernandez <gabriel.fernandez@xxxxxx> This patch introduces I2S clock for stm32f4 soc. The I2S clock could be derived from an external clock or from pll-i2s Signed-off-by: Gabriel Fernandez <gabriel.fernandez@xxxxxx> --- drivers/clk/clk-stm32f4.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/clk/clk-stm32f4.c b/drivers/clk/clk-stm32f4.c index 86244fc..3063b30 100644 --- a/drivers/clk/clk-stm32f4.c +++ b/drivers/clk/clk-stm32f4.c @@ -935,6 +935,8 @@ static struct clk_hw *stm32_register_cclk(struct device *dev, const char *name, static const char *lcd_parent[1] = { "pllsai-r-div" }; +static const char *i2s_parents[2] = { "plli2s-r", NULL }; + struct stm32_aux_clk { int idx; const char *name; @@ -969,6 +971,12 @@ struct stm32f4_clk_data { STM32F4_RCC_APB2ENR, 26, CLK_SET_RATE_PARENT }, + { + CLK_I2S, "i2s", i2s_parents, ARRAY_SIZE(i2s_parents), + STM32F4_RCC_CFGR, 23, 1, + NO_GATE, 0, + CLK_SET_RATE_PARENT + }, }; static const struct stm32f4_clk_data stm32f429_clk_data = { @@ -1063,7 +1071,7 @@ static struct clk_hw *stm32_register_aux_clk(const char *name, static void __init stm32f4_rcc_init(struct device_node *np) { - const char *hse_clk; + const char *hse_clk, *i2s_in_clk; int n; const struct of_device_id *match; const struct stm32f4_clk_data *data; @@ -1098,6 +1106,10 @@ static void __init stm32f4_rcc_init(struct device_node *np) hse_clk = of_clk_get_parent_name(np, 0); + i2s_in_clk = of_clk_get_parent_name(np, 1); + + i2s_parents[1] = i2s_in_clk; + clk_register_fixed_rate_with_accuracy(NULL, "hsi", NULL, 0, 16000000, 160000); pllcfgr = readl(base + STM32F4_RCC_PLLCFGR); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html