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Subject[PATCH v2 2/3] clk: mediatek: Add support for clk-mux using regmap
Date
This patches adds support for the mediatek clocks to be able to register
and use a clk-mux wich relies on regmap.

Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
---
drivers/clk/mediatek/clk-mtk.c | 37 +++++++++++++++++++++++++++++++++++++
drivers/clk/mediatek/clk-mtk.h | 26 ++++++++++++++++++++++++++
2 files changed, 63 insertions(+)

diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index 18444ae..cf953a8 100644
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -111,6 +111,43 @@ int mtk_clk_register_gates(struct device_node *node, const struct mtk_gate *clks
return 0;
}

+int mtk_clk_regm_register_mux(struct device_node *node,
+ const struct mtk_regm_mux *clks, int num,
+ struct clk_onecell_data *clk_data)
+{
+ int i;
+ struct clk *clk;
+ struct regmap *regmap;
+
+ if (!clk_data)
+ return -ENOMEM;
+
+ regmap = syscon_node_to_regmap(node);
+ if (IS_ERR(regmap)) {
+ pr_err("Cannot find regmap for %s: %ld\n", node->full_name,
+ PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+
+ for (i = 0; i < num; i++) {
+ const struct mtk_regm_mux *mux = &clks[i];
+
+ clk = clk_regm_register_mux(NULL, mux->name, mux->parent_names,
+ mux->num_parents, 0, regmap,
+ mux->mux_offset, mux->mux_shift,
+ mux->mux_width, mux->flags, NULL);
+ if (IS_ERR(clk)) {
+ pr_err("Failed to register clk mux %s: %ld\n",
+ mux->name, PTR_ERR(clk));
+ continue;
+ }
+
+ clk_data->clks[mux->id] = clk;
+ }
+
+ return 0;
+}
+
struct clk *mtk_clk_register_composite(const struct mtk_composite *mc,
void __iomem *base, spinlock_t *lock)
{
diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index 61035b9..3f41725 100644
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -156,6 +156,32 @@ void __init mtk_clk_register_plls(struct device_node *node,
const struct mtk_pll_data *plls, int num_plls,
struct clk_onecell_data *clk_data);

+struct mtk_regm_mux {
+ int id;
+ const char *name;
+ const char * const *parent_names;
+ u8 num_parents;
+ unsigned flags;
+ uint32_t mux_offset;
+ uint32_t mux_shift;
+ uint32_t mux_width;
+};
+
+int __init mtk_clk_regm_register_mux(struct device_node *node,
+ const struct mtk_regm_mux *clks, int num,
+ struct clk_onecell_data *clk_data);
+
+#define MUX_REGMAP(_id, _name, _parents, _offset, _shift, _width) { \
+ .id = _id, \
+ .name = _name, \
+ .parent_names = _parents, \
+ .num_parents = ARRAY_SIZE(_parents), \
+ .flags = CLK_SET_RATE_PARENT, \
+ .mux_offset = _offset, \
+ .mux_shift = _shift, \
+ .mux_width = _width, \
+ }
+
#ifdef CONFIG_RESET_CONTROLLER
void mtk_register_reset_controller(struct device_node *np,
unsigned int num_regs, int regofs);
--
1.9.1


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