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| author | Gabriel Fernandez <gabriel.fernandez@st.com> | 2016-12-13 15:20:16 +0100 |
|---|---|---|
| committer | Stephen Boyd <sboyd@codeaurora.org> | 2016-12-21 16:09:10 -0800 |
| commit | 12696bac3ac256f4baa730b3a7b6712c602ea578 (patch) | |
| tree | 994b6168016a8d41aa3f163d70b47807e0aee090 /drivers/clk/clk-stm32f4.c | |
| parent | daf2d117cbca8913b02643aff36ec8763f7d8198 (diff) | |
| download | linux-12696bac3ac256f4baa730b3a7b6712c602ea578.tar.gz linux-12696bac3ac256f4baa730b3a7b6712c602ea578.tar.bz2 linux-12696bac3ac256f4baa730b3a7b6712c602ea578.zip | |
clk: stm32f4: Add I2S clock
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@st.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk/clk-stm32f4.c')
| -rw-r--r-- | drivers/clk/clk-stm32f4.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/clk/clk-stm32f4.c b/drivers/clk/clk-stm32f4.c index fb9c4de9bb3a..fde883a73394 100644 --- a/drivers/clk/clk-stm32f4.c +++ b/drivers/clk/clk-stm32f4.c @@ -946,6 +946,8 @@ static const char *rtc_parents[4] = { 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 @@ static const struct stm32_aux_clk stm32f429_aux_clk[] = { 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 @@ fail: 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); |