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path: root/drivers/clk/ti
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Diffstat (limited to 'drivers/clk/ti')
-rw-r--r--drivers/clk/ti/clk.c38
-rw-r--r--drivers/clk/ti/clock.h13
-rw-r--r--drivers/clk/ti/divider.c26
-rw-r--r--drivers/clk/ti/mux.c13
4 files changed, 77 insertions, 13 deletions
diff --git a/drivers/clk/ti/clk.c b/drivers/clk/ti/clk.c
index f4d6802a8544..7d22e1af2247 100644
--- a/drivers/clk/ti/clk.c
+++ b/drivers/clk/ti/clk.c
@@ -55,6 +55,29 @@ static void clk_memmap_writel(u32 val, const struct clk_omap_reg *reg)
writel_relaxed(val, io->mem + reg->offset);
}
+static void _clk_rmw(u32 val, u32 mask, void __iomem *ptr)
+{
+ u32 v;
+
+ v = readl_relaxed(ptr);
+ v &= ~mask;
+ v |= val;
+ writel_relaxed(v, ptr);
+}
+
+static void clk_memmap_rmw(u32 val, u32 mask, const struct clk_omap_reg *reg)
+{
+ struct clk_iomap *io = clk_memmaps[reg->index];
+
+ if (reg->ptr) {
+ _clk_rmw(val, mask, reg->ptr);
+ } else if (io->regmap) {
+ regmap_update_bits(io->regmap, reg->offset, mask, val);
+ } else {
+ _clk_rmw(val, mask, io->mem + reg->offset);
+ }
+}
+
static u32 clk_memmap_readl(const struct clk_omap_reg *reg)
{
u32 val;
@@ -89,6 +112,7 @@ int ti_clk_setup_ll_ops(struct ti_clk_ll_ops *ops)
ti_clk_ll_ops = ops;
ops->clk_readl = clk_memmap_readl;
ops->clk_writel = clk_memmap_writel;
+ ops->clk_rmw = clk_memmap_rmw;
return 0;
}
@@ -251,6 +275,20 @@ int ti_clk_get_reg_addr(struct device_node *node, int index,
return 0;
}
+void ti_clk_latch(struct clk_omap_reg *reg, s8 shift)
+{
+ u32 latch;
+
+ if (shift < 0)
+ return;
+
+ latch = 1 << shift;
+
+ ti_clk_ll_ops->clk_rmw(latch, latch, reg);
+ ti_clk_ll_ops->clk_rmw(0, latch, reg);
+ ti_clk_ll_ops->clk_readl(reg); /* OCP barrier */
+}
+
/**
* omap2_clk_provider_init - init master clock provider
* @parent: master node
diff --git a/drivers/clk/ti/clock.h b/drivers/clk/ti/clock.h
index d9b43bfc2532..b58278077226 100644
--- a/drivers/clk/ti/clock.h
+++ b/drivers/clk/ti/clock.h
@@ -22,6 +22,7 @@ struct clk_omap_divider {
u8 shift;
u8 width;
u8 flags;
+ s8 latch;
const struct clk_div_table *table;
};
@@ -33,6 +34,7 @@ struct clk_omap_mux {
u32 *table;
u32 mask;
u8 shift;
+ s8 latch;
u8 flags;
};
@@ -74,6 +76,11 @@ enum {
#define CLKF_CORE (1 << 9)
#define CLKF_J_TYPE (1 << 10)
+/* CLKCTRL flags */
+#define CLKF_SW_SUP BIT(5)
+#define CLKF_HW_SUP BIT(6)
+#define CLKF_NO_IDLEST BIT(7)
+
#define CLK(dev, con, ck) \
{ \
.lk = { \
@@ -183,10 +190,6 @@ extern const struct omap_clkctrl_data am438x_clkctrl_data[];
extern const struct omap_clkctrl_data dm814_clkctrl_data[];
extern const struct omap_clkctrl_data dm816_clkctrl_data[];
-#define CLKF_SW_SUP BIT(0)
-#define CLKF_HW_SUP BIT(1)
-#define CLKF_NO_IDLEST BIT(2)
-
typedef void (*ti_of_clk_init_cb_t)(void *, struct device_node *);
struct clk *ti_clk_register(struct device *dev, struct clk_hw *hw,
@@ -194,6 +197,8 @@ struct clk *ti_clk_register(struct device *dev, struct clk_hw *hw,
int ti_clk_add_alias(struct device *dev, struct clk *clk, const char *con);
void ti_clk_add_aliases(void);
+void ti_clk_latch(struct clk_omap_reg *reg, s8 shift);
+
struct clk_hw *ti_clk_build_component_mux(struct ti_clk_mux *setup);
int ti_clk_parse_divider_data(int *div_table, int num_dividers, int max_div,
diff --git a/drivers/clk/ti/divider.c b/drivers/clk/ti/divider.c
index 77f93f6d2806..aaa277dd6d99 100644
--- a/drivers/clk/ti/divider.c
+++ b/drivers/clk/ti/divider.c
@@ -263,6 +263,8 @@ static int ti_clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
val |= value << divider->shift;
ti_clk_ll_ops->clk_writel(val, &divider->reg);
+ ti_clk_latch(&divider->reg, divider->latch);
+
return 0;
}
@@ -276,7 +278,8 @@ static struct clk *_register_divider(struct device *dev, const char *name,
const char *parent_name,
unsigned long flags,
struct clk_omap_reg *reg,
- u8 shift, u8 width, u8 clk_divider_flags,
+ u8 shift, u8 width, s8 latch,
+ u8 clk_divider_flags,
const struct clk_div_table *table)
{
struct clk_omap_divider *div;
@@ -305,6 +308,7 @@ static struct clk *_register_divider(struct device *dev, const char *name,
memcpy(&div->reg, reg, sizeof(*reg));
div->shift = shift;
div->width = width;
+ div->latch = latch;
div->flags = clk_divider_flags;
div->hw.init = &init;
div->table = table;
@@ -420,6 +424,7 @@ struct clk_hw *ti_clk_build_component_div(struct ti_clk_divider *setup)
div->table = _get_div_table_from_setup(setup, &div->width);
div->shift = setup->bit_shift;
+ div->latch = -EINVAL;
return &div->hw;
}
@@ -452,7 +457,7 @@ struct clk *ti_clk_register_divider(struct ti_clk *setup)
clk = _register_divider(NULL, setup->name, div->parent,
flags, &reg, div->bit_shift,
- width, div_flags, table);
+ width, -EINVAL, div_flags, table);
if (IS_ERR(clk))
kfree(table);
@@ -556,7 +561,7 @@ static int _get_divider_width(struct device_node *node,
static int __init ti_clk_divider_populate(struct device_node *node,
struct clk_omap_reg *reg, const struct clk_div_table **table,
- u32 *flags, u8 *div_flags, u8 *width, u8 *shift)
+ u32 *flags, u8 *div_flags, u8 *width, u8 *shift, s8 *latch)
{
u32 val;
int ret;
@@ -570,6 +575,13 @@ static int __init ti_clk_divider_populate(struct device_node *node,
else
*shift = 0;
+ if (latch) {
+ if (!of_property_read_u32(node, "ti,latch-bit", &val))
+ *latch = val;
+ else
+ *latch = -EINVAL;
+ }
+
*flags = 0;
*div_flags = 0;
@@ -606,17 +618,18 @@ static void __init of_ti_divider_clk_setup(struct device_node *node)
u8 clk_divider_flags = 0;
u8 width = 0;
u8 shift = 0;
+ s8 latch = -EINVAL;
const struct clk_div_table *table = NULL;
u32 flags = 0;
parent_name = of_clk_get_parent_name(node, 0);
if (ti_clk_divider_populate(node, &reg, &table, &flags,
- &clk_divider_flags, &width, &shift))
+ &clk_divider_flags, &width, &shift, &latch))
goto cleanup;
clk = _register_divider(NULL, node->name, parent_name, flags, &reg,
- shift, width, clk_divider_flags, table);
+ shift, width, latch, clk_divider_flags, table);
if (!IS_ERR(clk)) {
of_clk_add_provider(node, of_clk_src_simple_get, clk);
@@ -639,7 +652,8 @@ static void __init of_ti_composite_divider_clk_setup(struct device_node *node)
return;
if (ti_clk_divider_populate(node, &div->reg, &div->table, &val,
- &div->flags, &div->width, &div->shift) < 0)
+ &div->flags, &div->width, &div->shift,
+ NULL) < 0)
goto cleanup;
if (!ti_clk_add_component(node, &div->hw, CLK_COMPONENT_TYPE_DIVIDER))
diff --git a/drivers/clk/ti/mux.c b/drivers/clk/ti/mux.c
index d4705803f3d3..69a4308a5a98 100644
--- a/drivers/clk/ti/mux.c
+++ b/drivers/clk/ti/mux.c
@@ -86,6 +86,7 @@ static int ti_clk_mux_set_parent(struct clk_hw *hw, u8 index)
}
val |= index << mux->shift;
ti_clk_ll_ops->clk_writel(val, &mux->reg);
+ ti_clk_latch(&mux->reg, mux->latch);
return 0;
}
@@ -100,7 +101,7 @@ static struct clk *_register_mux(struct device *dev, const char *name,
const char * const *parent_names,
u8 num_parents, unsigned long flags,
struct clk_omap_reg *reg, u8 shift, u32 mask,
- u8 clk_mux_flags, u32 *table)
+ s8 latch, u8 clk_mux_flags, u32 *table)
{
struct clk_omap_mux *mux;
struct clk *clk;
@@ -121,6 +122,7 @@ static struct clk *_register_mux(struct device *dev, const char *name,
memcpy(&mux->reg, reg, sizeof(*reg));
mux->shift = shift;
mux->mask = mask;
+ mux->latch = latch;
mux->flags = clk_mux_flags;
mux->table = table;
mux->hw.init = &init;
@@ -160,7 +162,7 @@ struct clk *ti_clk_register_mux(struct ti_clk *setup)
flags |= CLK_SET_RATE_PARENT;
return _register_mux(NULL, setup->name, mux->parents, mux->num_parents,
- flags, &reg, mux->bit_shift, mask,
+ flags, &reg, mux->bit_shift, mask, -EINVAL,
mux_flags, NULL);
}
@@ -179,6 +181,7 @@ static void of_mux_clk_setup(struct device_node *node)
u8 clk_mux_flags = 0;
u32 mask = 0;
u32 shift = 0;
+ s32 latch = -EINVAL;
u32 flags = CLK_SET_RATE_NO_REPARENT;
num_parents = of_clk_get_parent_count(node);
@@ -197,6 +200,8 @@ static void of_mux_clk_setup(struct device_node *node)
of_property_read_u32(node, "ti,bit-shift", &shift);
+ of_property_read_u32(node, "ti,latch-bit", &latch);
+
if (of_property_read_bool(node, "ti,index-starts-at-one"))
clk_mux_flags |= CLK_MUX_INDEX_ONE;
@@ -211,7 +216,8 @@ static void of_mux_clk_setup(struct device_node *node)
mask = (1 << fls(mask)) - 1;
clk = _register_mux(NULL, node->name, parent_names, num_parents,
- flags, &reg, shift, mask, clk_mux_flags, NULL);
+ flags, &reg, shift, mask, latch, clk_mux_flags,
+ NULL);
if (!IS_ERR(clk))
of_clk_add_provider(node, of_clk_src_simple_get, clk);
@@ -234,6 +240,7 @@ struct clk_hw *ti_clk_build_component_mux(struct ti_clk_mux *setup)
return ERR_PTR(-ENOMEM);
mux->shift = setup->bit_shift;
+ mux->latch = -EINVAL;
mux->reg.index = setup->module;
mux->reg.offset = setup->reg;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 06:46:10 +0000