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Subject[PATCH 13/14] clk: stm32mp1: add MCO clocks
Date
From: Gabriel Fernandez <gabriel.fernandez@st.com>

Two micro-controller clock output (MCO) pins are available: MCO1 and MCO2.
For each output, it is possible to select a clock source.
The selected clock can be divided thanks to configurable prescaler.

Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
---
drivers/clk/clk-stm32mp1.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)

diff --git a/drivers/clk/clk-stm32mp1.c b/drivers/clk/clk-stm32mp1.c
index 1cb06b0..0402a0e 100644
--- a/drivers/clk/clk-stm32mp1.c
+++ b/drivers/clk/clk-stm32mp1.c
@@ -1188,6 +1188,16 @@ static struct clk_hw *_clk_register_cktim(struct device *dev,
_MUX(_mux_offset, _mux_bit, _mux_width, 0),\
}

+#define _GATEMUXDIV(_gate_offset, _bit_idx,\
+ _mux_offset, _mux_bit, _mux_width,\
+ _div_offset, _div_bit, _div_width\
+ )\
+{\
+ _DIV(_div_offset, _div_bit, _div_width, 0),\
+ _GATE(_gate_offset, _bit_idx, 0),\
+ _MUX(_mux_offset, _mux_bit, _mux_width, 0),\
+}
+
#define _MP1_GATE(_gate_offset, _bit_idx, _flags)\
_GATE_OPS(_gate_offset, _bit_idx, _flags, &mp1_gate_clk_ops)

@@ -1543,6 +1553,19 @@ static struct clk_hw *_clk_register_cktim(struct device *dev,
COMPOSITE(RTC, "ck_rtc", rtc_src, CLK_OPS_PARENT_ENABLE |
CLK_SET_RATE_PARENT,
_GATEMUX(RCC_BDCR, 20, RCC_BDCR, 16, 2)),
+
+ /* MCO clocks */
+ COMPOSITE(CK_MCO1, "ck_mco1", mco1_src, CLK_OPS_PARENT_ENABLE |
+ CLK_SET_RATE_NO_REPARENT,
+ _GATEMUXDIV(RCC_MCO1CFGR, 12,
+ RCC_MCO1CFGR, 0, 3,
+ RCC_MCO1CFGR, 4, 4)),
+
+ COMPOSITE(CK_MCO2, "ck_mco2", mco2_src, CLK_OPS_PARENT_ENABLE |
+ CLK_SET_RATE_NO_REPARENT,
+ _GATEMUXDIV(RCC_MCO2CFGR, 12,
+ RCC_MCO2CFGR, 0, 3,
+ RCC_MCO2CFGR, 4, 4)),
};

struct stm32_clock_match_data {
--
1.9.1
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