From: Gabriel Fernandez <gabriel.fernandez@xxxxxx>
This patch introduces SAI clocks for stm32f4 socs.
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@xxxxxx>
---
Documentation/devicetree/bindings/clock/st,stm32-rcc.txt | 2 ++
drivers/clk/clk-stm32f4.c | 16 ++++++++++++++++
include/dt-bindings/clock/stm32f4-clock.h | 4 +++-
3 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt b/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt
index 8c1ca68..8f93740 100644
--- a/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt
+++ b/Documentation/devicetree/bindings/clock/st,stm32-rcc.txt
@@ -79,6 +79,8 @@ The secondary index is bound with the following magic numbers:
7 PLL_VCO_SAI (vco frequency of SAI pll)
8 CLK_LCD (LCD-TFT)
9 CLK_I2S (I2S clocks)
+ 10 CLK_SAI1 (audio clocks)
+ 11 CLK_SAI2
Example:
diff --git a/drivers/clk/clk-stm32f4.c b/drivers/clk/clk-stm32f4.c
index 3063b30..02339d1 100644
--- a/drivers/clk/clk-stm32f4.c
+++ b/drivers/clk/clk-stm32f4.c
@@ -937,6 +937,9 @@ static struct clk_hw *stm32_register_cclk(struct device *dev, const char *name,
static const char *i2s_parents[2] = { "plli2s-r", NULL };
+static const char *sai_parents[4] = { "pllsai-q-div", "plli2s-q-div", NULL,
+ "no-clock" };
+
struct stm32_aux_clk {
int idx;
const char *name;
@@ -977,6 +980,18 @@ struct stm32f4_clk_data {
NO_GATE, 0,
CLK_SET_RATE_PARENT
},
+ {
+ CLK_SAI1, "sai1-a", sai_parents, ARRAY_SIZE(sai_parents),
+ STM32F4_RCC_DCKCFGR, 20, 3,
+ STM32F4_RCC_APB2ENR, 22,
+ CLK_SET_RATE_PARENT
+ },
+ {
+ CLK_SAI2, "sai1-b", sai_parents, ARRAY_SIZE(sai_parents),
+ STM32F4_RCC_DCKCFGR, 22, 3,
+ STM32F4_RCC_APB2ENR, 22,
+ CLK_SET_RATE_PARENT
+ },
};
static const struct stm32f4_clk_data stm32f429_clk_data = {
@@ -1109,6 +1124,7 @@ static void __init stm32f4_rcc_init(struct device_node *np)
i2s_in_clk = of_clk_get_parent_name(np, 1);
i2s_parents[1] = i2s_in_clk;
+ sai_parents[2] = i2s_in_clk;
clk_register_fixed_rate_with_accuracy(NULL, "hsi", NULL, 0,
16000000, 160000);
diff --git a/include/dt-bindings/clock/stm32f4-clock.h b/include/dt-bindings/clock/stm32f4-clock.h
index b129ab9..5431f00 100644
--- a/include/dt-bindings/clock/stm32f4-clock.h
+++ b/include/dt-bindings/clock/stm32f4-clock.h
@@ -29,7 +29,9 @@
#define PLL_VCO_SAI 7
#define CLK_LCD 8
#define CLK_I2S 9
+#define CLK_SAI1 10
+#define CLK_SAI2 11
-#define END_PRIMARY_CLK 10
+#define END_PRIMARY_CLK 12
#endif
--
1.9.1
--
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