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clk: stm32f4: Add I2S clock

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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>
This commit is contained in:
Gabriel Fernandez 2016-12-13 15:20:16 +01:00 committed by Stephen Boyd
parent daf2d117cb
commit 12696bac3a
1 changed files with 13 additions and 1 deletions
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14
drivers/clk/clk-stm32f4.c
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@ -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);