[PATCH v4 5/9] clk: stm32f4: Add I2S clock
From: gabriel.fernandez at st.com <hidden>
Date: 2016-12-13 14:24:05
Also in:
linux-clk, linux-devicetree, lkml
Subsystem:
common clk framework, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Linus Torvalds
From: Gabriel Fernandez <redacted> 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 <redacted> --- 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 076a063..a7a6a16 100644
--- a/drivers/clk/clk-stm32f4.c
+++ b/drivers/clk/clk-stm32f4.c@@ -946,6 +946,8 @@ 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;
@@ -975,6 +977,12 @@ 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 = {
@@ -1069,7 +1077,7 @@ 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;
@@ -1104,6 +1112,10 @@ 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