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-rw-r--r--drivers/clk/microchip/clk-mpfs.c154
1 files changed, 87 insertions, 67 deletions
diff --git a/drivers/clk/microchip/clk-mpfs.c b/drivers/clk/microchip/clk-mpfs.c
index c8ffa755b5..22eab91a67 100644
--- a/drivers/clk/microchip/clk-mpfs.c
+++ b/drivers/clk/microchip/clk-mpfs.c
@@ -15,7 +15,8 @@
/* address offset of control registers */
#define REG_MSSPLL_REF_CR 0x08u
-#define REG_MSSPLL_POSTDIV_CR 0x10u
+#define REG_MSSPLL_POSTDIV01_CR 0x10u
+#define REG_MSSPLL_POSTDIV23_CR 0x14u
#define REG_MSSPLL_SSCG_2_CR 0x2Cu
#define REG_CLOCK_CONFIG_CR 0x08u
#define REG_RTC_CLOCK_CR 0x0Cu
@@ -26,10 +27,18 @@
#define MSSPLL_FBDIV_WIDTH 0x0Cu
#define MSSPLL_REFDIV_SHIFT 0x08u
#define MSSPLL_REFDIV_WIDTH 0x06u
-#define MSSPLL_POSTDIV_SHIFT 0x08u
+#define MSSPLL_POSTDIV02_SHIFT 0x08u
+#define MSSPLL_POSTDIV13_SHIFT 0x18u
#define MSSPLL_POSTDIV_WIDTH 0x07u
#define MSSPLL_FIXED_DIV 4u
+/*
+ * This clock ID is defined here, rather than the binding headers, as it is an
+ * internal clock only, and therefore has no consumers in other peripheral
+ * blocks.
+ */
+#define CLK_MSSPLL_INTERNAL 38u
+
struct mpfs_clock_data {
struct device *dev;
void __iomem *base;
@@ -39,17 +48,27 @@ struct mpfs_clock_data {
struct mpfs_msspll_hw_clock {
void __iomem *base;
+ struct clk_hw hw;
+ struct clk_init_data init;
unsigned int id;
u32 reg_offset;
u32 shift;
u32 width;
u32 flags;
- struct clk_hw hw;
- struct clk_init_data init;
};
#define to_mpfs_msspll_clk(_hw) container_of(_hw, struct mpfs_msspll_hw_clock, hw)
+struct mpfs_msspll_out_hw_clock {
+ void __iomem *base;
+ struct clk_divider output;
+ struct clk_init_data init;
+ unsigned int id;
+ u32 reg_offset;
+};
+
+#define to_mpfs_msspll_out_clk(_hw) container_of(_hw, struct mpfs_msspll_out_hw_clock, hw)
+
struct mpfs_cfg_hw_clock {
struct clk_divider cfg;
struct clk_init_data init;
@@ -93,93 +112,40 @@ static const struct clk_div_table mpfs_div_rtcref_table[] = {
{ 0, 0 }
};
-static unsigned long mpfs_clk_msspll_recalc_rate(struct clk_hw *hw, unsigned long prate)
-{
- struct mpfs_msspll_hw_clock *msspll_hw = to_mpfs_msspll_clk(hw);
- void __iomem *mult_addr = msspll_hw->base + msspll_hw->reg_offset;
- void __iomem *ref_div_addr = msspll_hw->base + REG_MSSPLL_REF_CR;
- void __iomem *postdiv_addr = msspll_hw->base + REG_MSSPLL_POSTDIV_CR;
- u32 mult, ref_div, postdiv;
-
- mult = readl_relaxed(mult_addr) >> MSSPLL_FBDIV_SHIFT;
- mult &= clk_div_mask(MSSPLL_FBDIV_WIDTH);
- ref_div = readl_relaxed(ref_div_addr) >> MSSPLL_REFDIV_SHIFT;
- ref_div &= clk_div_mask(MSSPLL_REFDIV_WIDTH);
- postdiv = readl_relaxed(postdiv_addr) >> MSSPLL_POSTDIV_SHIFT;
- postdiv &= clk_div_mask(MSSPLL_POSTDIV_WIDTH);
-
- return prate * mult / (ref_div * MSSPLL_FIXED_DIV * postdiv);
-}
+/*
+ * MSS PLL internal clock
+ */
-static long mpfs_clk_msspll_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *prate)
+static unsigned long mpfs_clk_msspll_recalc_rate(struct clk_hw *hw, unsigned long prate)
{
struct mpfs_msspll_hw_clock *msspll_hw = to_mpfs_msspll_clk(hw);
void __iomem *mult_addr = msspll_hw->base + msspll_hw->reg_offset;
void __iomem *ref_div_addr = msspll_hw->base + REG_MSSPLL_REF_CR;
u32 mult, ref_div;
- unsigned long rate_before_ctrl;
-
- mult = readl_relaxed(mult_addr) >> MSSPLL_FBDIV_SHIFT;
- mult &= clk_div_mask(MSSPLL_FBDIV_WIDTH);
- ref_div = readl_relaxed(ref_div_addr) >> MSSPLL_REFDIV_SHIFT;
- ref_div &= clk_div_mask(MSSPLL_REFDIV_WIDTH);
-
- rate_before_ctrl = rate * (ref_div * MSSPLL_FIXED_DIV) / mult;
-
- return divider_round_rate(hw, rate_before_ctrl, prate, NULL, MSSPLL_POSTDIV_WIDTH,
- msspll_hw->flags);
-}
-
-static int mpfs_clk_msspll_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long prate)
-{
- struct mpfs_msspll_hw_clock *msspll_hw = to_mpfs_msspll_clk(hw);
- void __iomem *mult_addr = msspll_hw->base + msspll_hw->reg_offset;
- void __iomem *ref_div_addr = msspll_hw->base + REG_MSSPLL_REF_CR;
- void __iomem *postdiv_addr = msspll_hw->base + REG_MSSPLL_POSTDIV_CR;
- u32 mult, ref_div, postdiv;
- int divider_setting;
- unsigned long rate_before_ctrl, flags;
mult = readl_relaxed(mult_addr) >> MSSPLL_FBDIV_SHIFT;
mult &= clk_div_mask(MSSPLL_FBDIV_WIDTH);
ref_div = readl_relaxed(ref_div_addr) >> MSSPLL_REFDIV_SHIFT;
ref_div &= clk_div_mask(MSSPLL_REFDIV_WIDTH);
- rate_before_ctrl = rate * (ref_div * MSSPLL_FIXED_DIV) / mult;
- divider_setting = divider_get_val(rate_before_ctrl, prate, NULL, MSSPLL_POSTDIV_WIDTH,
- msspll_hw->flags);
-
- if (divider_setting < 0)
- return divider_setting;
-
- spin_lock_irqsave(&mpfs_clk_lock, flags);
-
- postdiv = readl_relaxed(postdiv_addr);
- postdiv &= ~(clk_div_mask(MSSPLL_POSTDIV_WIDTH) << MSSPLL_POSTDIV_SHIFT);
- writel_relaxed(postdiv, postdiv_addr);
-
- spin_unlock_irqrestore(&mpfs_clk_lock, flags);
-
- return 0;
+ return prate * mult / (ref_div * MSSPLL_FIXED_DIV);
}
static const struct clk_ops mpfs_clk_msspll_ops = {
.recalc_rate = mpfs_clk_msspll_recalc_rate,
- .round_rate = mpfs_clk_msspll_round_rate,
- .set_rate = mpfs_clk_msspll_set_rate,
};
#define CLK_PLL(_id, _name, _parent, _shift, _width, _flags, _offset) { \
.id = _id, \
+ .flags = _flags, \
.shift = _shift, \
.width = _width, \
.reg_offset = _offset, \
- .flags = _flags, \
.hw.init = CLK_HW_INIT_PARENTS_DATA(_name, _parent, &mpfs_clk_msspll_ops, 0), \
}
static struct mpfs_msspll_hw_clock mpfs_msspll_clks[] = {
- CLK_PLL(CLK_MSSPLL, "clk_msspll", mpfs_ext_ref, MSSPLL_FBDIV_SHIFT,
+ CLK_PLL(CLK_MSSPLL_INTERNAL, "clk_msspll_internal", mpfs_ext_ref, MSSPLL_FBDIV_SHIFT,
MSSPLL_FBDIV_WIDTH, 0, REG_MSSPLL_SSCG_2_CR),
};
@@ -196,7 +162,7 @@ static int mpfs_clk_register_mssplls(struct device *dev, struct mpfs_msspll_hw_c
ret = devm_clk_hw_register(dev, &msspll_hw->hw);
if (ret)
return dev_err_probe(dev, ret, "failed to register msspll id: %d\n",
- CLK_MSSPLL);
+ CLK_MSSPLL_INTERNAL);
data->hw_data.hws[msspll_hw->id] = &msspll_hw->hw;
}
@@ -205,6 +171,54 @@ static int mpfs_clk_register_mssplls(struct device *dev, struct mpfs_msspll_hw_c
}
/*
+ * MSS PLL output clocks
+ */
+
+#define CLK_PLL_OUT(_id, _name, _parent, _flags, _shift, _width, _offset) { \
+ .id = _id, \
+ .output.shift = _shift, \
+ .output.width = _width, \
+ .output.table = NULL, \
+ .reg_offset = _offset, \
+ .output.flags = _flags, \
+ .output.hw.init = CLK_HW_INIT(_name, _parent, &clk_divider_ops, 0), \
+ .output.lock = &mpfs_clk_lock, \
+}
+
+static struct mpfs_msspll_out_hw_clock mpfs_msspll_out_clks[] = {
+ CLK_PLL_OUT(CLK_MSSPLL0, "clk_msspll", "clk_msspll_internal", CLK_DIVIDER_ONE_BASED,
+ MSSPLL_POSTDIV02_SHIFT, MSSPLL_POSTDIV_WIDTH, REG_MSSPLL_POSTDIV01_CR),
+ CLK_PLL_OUT(CLK_MSSPLL1, "clk_msspll1", "clk_msspll_internal", CLK_DIVIDER_ONE_BASED,
+ MSSPLL_POSTDIV13_SHIFT, MSSPLL_POSTDIV_WIDTH, REG_MSSPLL_POSTDIV01_CR),
+ CLK_PLL_OUT(CLK_MSSPLL2, "clk_msspll2", "clk_msspll_internal", CLK_DIVIDER_ONE_BASED,
+ MSSPLL_POSTDIV02_SHIFT, MSSPLL_POSTDIV_WIDTH, REG_MSSPLL_POSTDIV23_CR),
+ CLK_PLL_OUT(CLK_MSSPLL3, "clk_msspll3", "clk_msspll_internal", CLK_DIVIDER_ONE_BASED,
+ MSSPLL_POSTDIV13_SHIFT, MSSPLL_POSTDIV_WIDTH, REG_MSSPLL_POSTDIV23_CR),
+};
+
+static int mpfs_clk_register_msspll_outs(struct device *dev,
+ struct mpfs_msspll_out_hw_clock *msspll_out_hws,
+ unsigned int num_clks, struct mpfs_clock_data *data)
+{
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < num_clks; i++) {
+ struct mpfs_msspll_out_hw_clock *msspll_out_hw = &msspll_out_hws[i];
+
+ msspll_out_hw->output.reg = data->msspll_base + msspll_out_hw->reg_offset;
+ ret = devm_clk_hw_register(dev, &msspll_out_hw->output.hw);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to register msspll out id: %d\n",
+ msspll_out_hw->id);
+
+ data->hw_data.hws[msspll_out_hw->id] = &msspll_out_hw->output.hw;
+ }
+
+ return 0;
+}
+
+/*
* "CFG" clocks
*/
@@ -442,8 +456,8 @@ static int mpfs_clk_probe(struct platform_device *pdev)
int ret;
/* CLK_RESERVED is not part of clock arrays, so add 1 */
- num_clks = ARRAY_SIZE(mpfs_msspll_clks) + ARRAY_SIZE(mpfs_cfg_clks)
- + ARRAY_SIZE(mpfs_periph_clks) + 1;
+ num_clks = ARRAY_SIZE(mpfs_msspll_clks) + ARRAY_SIZE(mpfs_msspll_out_clks)
+ + ARRAY_SIZE(mpfs_cfg_clks) + ARRAY_SIZE(mpfs_periph_clks) + 1;
clk_data = devm_kzalloc(dev, struct_size(clk_data, hw_data.hws, num_clks), GFP_KERNEL);
if (!clk_data)
@@ -466,6 +480,12 @@ static int mpfs_clk_probe(struct platform_device *pdev)
if (ret)
return ret;
+ ret = mpfs_clk_register_msspll_outs(dev, mpfs_msspll_out_clks,
+ ARRAY_SIZE(mpfs_msspll_out_clks),
+ clk_data);
+ if (ret)
+ return ret;
+
ret = mpfs_clk_register_cfgs(dev, mpfs_cfg_clks, ARRAY_SIZE(mpfs_cfg_clks), clk_data);
if (ret)
return ret;