lkml.org 
[lkml]   [2018]   [Mar]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 04/12] clk: stm32mp1: add Source Clocks for PLLs
Date
From: Gabriel Fernandez <gabriel.fernandez@st.com>

This patch adds source clocks for PLLs
This patch also introduces MUX clock API.

Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
---
drivers/clk/clk-stm32mp1.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 60 insertions(+)

diff --git a/drivers/clk/clk-stm32mp1.c b/drivers/clk/clk-stm32mp1.c
index 56b738e..47984f3 100644
--- a/drivers/clk/clk-stm32mp1.c
+++ b/drivers/clk/clk-stm32mp1.c
@@ -103,6 +103,18 @@

#define RCC_CLR 0x4

+static const char * const ref12_parents[] = {
+ "ck_hsi", "ck_hse"
+};
+
+static const char * const ref3_parents[] = {
+ "ck_hsi", "ck_hse", "ck_csi"
+};
+
+static const char * const ref4_parents[] = {
+ "ck_hsi", "ck_hse", "ck_csi"
+};
+
struct clock_config {
u32 id;
const char *name;
@@ -140,6 +152,14 @@ struct div_cfg {
const struct clk_div_table *table;
};

+struct mux_cfg {
+ u32 reg_off;
+ u8 shift;
+ u8 width;
+ u8 mux_flags;
+ u32 *table;
+};
+
struct stm32_gate_cfg {
struct gate_cfg *gate;
const struct clk_ops *ops;
@@ -196,6 +216,20 @@ struct stm32_gate_cfg {
lock);
}

+static struct clk_hw *
+_clk_hw_register_mux(struct device *dev,
+ struct clk_hw_onecell_data *clk_data,
+ void __iomem *base, spinlock_t *lock,
+ const struct clock_config *cfg)
+{
+ struct mux_cfg *mux_cfg = cfg->cfg;
+
+ return clk_hw_register_mux(dev, cfg->name, cfg->parent_names,
+ cfg->num_parents, cfg->flags,
+ mux_cfg->reg_off + base, mux_cfg->shift,
+ mux_cfg->width, mux_cfg->mux_flags, lock);
+}
+
/* MP1 Gate clock with set & clear registers */

static int mp1_gate_clk_enable(struct clk_hw *hw)
@@ -350,6 +384,22 @@ static void mp1_gate_clk_disable(struct clk_hw *hw)
DIV_TABLE(_id, _name, _parent, _flags, _offset, _shift, _width,\
_div_flags, NULL)

+#define MUX(_id, _name, _parents, _flags, _offset, _shift, _width, _mux_flags)\
+{\
+ .id = _id,\
+ .name = _name,\
+ .parent_names = _parents,\
+ .num_parents = ARRAY_SIZE(_parents),\
+ .flags = _flags,\
+ .cfg = &(struct mux_cfg) {\
+ .reg_off = _offset,\
+ .shift = _shift,\
+ .width = _width,\
+ .mux_flags = _mux_flags,\
+ },\
+ .func = _clk_hw_register_mux,\
+}
+
/* STM32 GATE */
#define STM32_GATE(_id, _name, _parent, _flags, _gate)\
{\
@@ -392,6 +442,16 @@ static void mp1_gate_clk_disable(struct clk_hw *hw)
GATE(CK_LSE, "ck_lse", "clk-lse", 0, RCC_BDCR, 0, 0),

FIXED_FACTOR(CK_HSE_DIV2, "clk-hse-div2", "ck_hse", 0, 1, 2),
+
+ /* ref clock pll */
+ MUX(NO_ID, "ref1", ref12_parents, CLK_OPS_PARENT_ENABLE, RCC_RCK12SELR,
+ 0, 2, CLK_MUX_READ_ONLY),
+
+ MUX(NO_ID, "ref3", ref3_parents, CLK_OPS_PARENT_ENABLE, RCC_RCK3SELR,
+ 0, 2, CLK_MUX_READ_ONLY),
+
+ MUX(NO_ID, "ref4", ref4_parents, CLK_OPS_PARENT_ENABLE, RCC_RCK4SELR,
+ 0, 2, CLK_MUX_READ_ONLY),
};

struct stm32_clock_match_data {
--
1.9.1
\
 
 \ /
  Last update: 2018-03-08 17:58    [W:0.107 / U:1.832 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site