Commit 12696bac authored by Gabriel Fernandez's avatar Gabriel Fernandez Committed by Stephen Boyd
Browse files

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: default avatarGabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
parent daf2d117

drivers/clk/clk-stm32f4.c

+13 −1
Original line number Diff line number Diff line
@@ -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 @@ 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);