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path: root/drivers/clk/qcom/clk-alpha-pll.c
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-rw-r--r--drivers/clk/qcom/clk-alpha-pll.c516
1 files changed, 423 insertions, 93 deletions
diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index 47a1da3739ce..6d04cd96482a 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -20,7 +20,7 @@
#include "clk-alpha-pll.h"
#include "common.h"
-#define PLL_MODE 0x00
+#define PLL_MODE(p) ((p)->offset + 0x0)
# define PLL_OUTCTRL BIT(0)
# define PLL_BYPASSNL BIT(1)
# define PLL_RESET_N BIT(2)
@@ -32,35 +32,87 @@
# define PLL_VOTE_FSM_ENA BIT(20)
# define PLL_FSM_ENA BIT(20)
# define PLL_VOTE_FSM_RESET BIT(21)
+# define PLL_UPDATE BIT(22)
+# define PLL_UPDATE_BYPASS BIT(23)
# define PLL_OFFLINE_ACK BIT(28)
+# define ALPHA_PLL_ACK_LATCH BIT(29)
# define PLL_ACTIVE_FLAG BIT(30)
# define PLL_LOCK_DET BIT(31)
-#define PLL_L_VAL 0x04
-#define PLL_ALPHA_VAL 0x08
-#define PLL_ALPHA_VAL_U 0x0c
+#define PLL_L_VAL(p) ((p)->offset + (p)->regs[PLL_OFF_L_VAL])
+#define PLL_ALPHA_VAL(p) ((p)->offset + (p)->regs[PLL_OFF_ALPHA_VAL])
+#define PLL_ALPHA_VAL_U(p) ((p)->offset + (p)->regs[PLL_OFF_ALPHA_VAL_U])
-#define PLL_USER_CTL 0x10
+#define PLL_USER_CTL(p) ((p)->offset + (p)->regs[PLL_OFF_USER_CTL])
# define PLL_POST_DIV_SHIFT 8
-# define PLL_POST_DIV_MASK 0xf
+# define PLL_POST_DIV_MASK(p) GENMASK((p)->width, 0)
# define PLL_ALPHA_EN BIT(24)
+# define PLL_ALPHA_MODE BIT(25)
# define PLL_VCO_SHIFT 20
# define PLL_VCO_MASK 0x3
-#define PLL_USER_CTL_U 0x14
-
-#define PLL_CONFIG_CTL 0x18
-#define PLL_CONFIG_CTL_U 0x20
-#define PLL_TEST_CTL 0x1c
-#define PLL_TEST_CTL_U 0x20
-#define PLL_STATUS 0x24
+#define PLL_USER_CTL_U(p) ((p)->offset + (p)->regs[PLL_OFF_USER_CTL_U])
+
+#define PLL_CONFIG_CTL(p) ((p)->offset + (p)->regs[PLL_OFF_CONFIG_CTL])
+#define PLL_CONFIG_CTL_U(p) ((p)->offset + (p)->regs[PLL_OFF_CONFIG_CTL_U])
+#define PLL_TEST_CTL(p) ((p)->offset + (p)->regs[PLL_OFF_TEST_CTL])
+#define PLL_TEST_CTL_U(p) ((p)->offset + (p)->regs[PLL_OFF_TEST_CTL_U])
+#define PLL_STATUS(p) ((p)->offset + (p)->regs[PLL_OFF_STATUS])
+
+const u8 clk_alpha_pll_regs[][PLL_OFF_MAX_REGS] = {
+ [CLK_ALPHA_PLL_TYPE_DEFAULT] = {
+ [PLL_OFF_L_VAL] = 0x04,
+ [PLL_OFF_ALPHA_VAL] = 0x08,
+ [PLL_OFF_ALPHA_VAL_U] = 0x0c,
+ [PLL_OFF_USER_CTL] = 0x10,
+ [PLL_OFF_USER_CTL_U] = 0x14,
+ [PLL_OFF_CONFIG_CTL] = 0x18,
+ [PLL_OFF_TEST_CTL] = 0x1c,
+ [PLL_OFF_TEST_CTL_U] = 0x20,
+ [PLL_OFF_STATUS] = 0x24,
+ },
+ [CLK_ALPHA_PLL_TYPE_HUAYRA] = {
+ [PLL_OFF_L_VAL] = 0x04,
+ [PLL_OFF_ALPHA_VAL] = 0x08,
+ [PLL_OFF_USER_CTL] = 0x10,
+ [PLL_OFF_CONFIG_CTL] = 0x14,
+ [PLL_OFF_CONFIG_CTL_U] = 0x18,
+ [PLL_OFF_TEST_CTL] = 0x1c,
+ [PLL_OFF_TEST_CTL_U] = 0x20,
+ [PLL_OFF_STATUS] = 0x24,
+ },
+ [CLK_ALPHA_PLL_TYPE_BRAMMO] = {
+ [PLL_OFF_L_VAL] = 0x04,
+ [PLL_OFF_ALPHA_VAL] = 0x08,
+ [PLL_OFF_ALPHA_VAL_U] = 0x0c,
+ [PLL_OFF_USER_CTL] = 0x10,
+ [PLL_OFF_CONFIG_CTL] = 0x18,
+ [PLL_OFF_TEST_CTL] = 0x1c,
+ [PLL_OFF_STATUS] = 0x24,
+ },
+};
+EXPORT_SYMBOL_GPL(clk_alpha_pll_regs);
/*
* Even though 40 bits are present, use only 32 for ease of calculation.
*/
#define ALPHA_REG_BITWIDTH 40
-#define ALPHA_BITWIDTH 32
-#define ALPHA_16BIT_MASK 0xffff
+#define ALPHA_REG_16BIT_WIDTH 16
+#define ALPHA_BITWIDTH 32U
+#define ALPHA_SHIFT(w) min(w, ALPHA_BITWIDTH)
+
+#define PLL_HUAYRA_M_WIDTH 8
+#define PLL_HUAYRA_M_SHIFT 8
+#define PLL_HUAYRA_M_MASK 0xff
+#define PLL_HUAYRA_N_SHIFT 0
+#define PLL_HUAYRA_N_MASK 0xff
+#define PLL_HUAYRA_ALPHA_WIDTH 16
+
+#define pll_alpha_width(p) \
+ ((PLL_ALPHA_VAL_U(p) - PLL_ALPHA_VAL(p) == 4) ? \
+ ALPHA_REG_BITWIDTH : ALPHA_REG_16BIT_WIDTH)
+
+#define pll_has_64bit_config(p) ((PLL_CONFIG_CTL_U(p) - PLL_CONFIG_CTL(p)) == 4)
#define to_clk_alpha_pll(_hw) container_of(to_clk_regmap(_hw), \
struct clk_alpha_pll, clkr)
@@ -71,18 +123,17 @@
static int wait_for_pll(struct clk_alpha_pll *pll, u32 mask, bool inverse,
const char *action)
{
- u32 val, off;
+ u32 val;
int count;
int ret;
const char *name = clk_hw_get_name(&pll->clkr.hw);
- off = pll->offset;
- ret = regmap_read(pll->clkr.regmap, off + PLL_MODE, &val);
+ ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
if (ret)
return ret;
for (count = 100; count > 0; count--) {
- ret = regmap_read(pll->clkr.regmap, off + PLL_MODE, &val);
+ ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
if (ret)
return ret;
if (inverse && !(val & mask))
@@ -109,16 +160,30 @@ static int wait_for_pll(struct clk_alpha_pll *pll, u32 mask, bool inverse,
#define wait_for_pll_offline(pll) \
wait_for_pll(pll, PLL_OFFLINE_ACK, 0, "offline")
+#define wait_for_pll_update(pll) \
+ wait_for_pll(pll, PLL_UPDATE, 1, "update")
+
+#define wait_for_pll_update_ack_set(pll) \
+ wait_for_pll(pll, ALPHA_PLL_ACK_LATCH, 0, "update_ack_set")
+
+#define wait_for_pll_update_ack_clear(pll) \
+ wait_for_pll(pll, ALPHA_PLL_ACK_LATCH, 1, "update_ack_clear")
+
void clk_alpha_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
const struct alpha_pll_config *config)
{
u32 val, mask;
- u32 off = pll->offset;
- regmap_write(regmap, off + PLL_L_VAL, config->l);
- regmap_write(regmap, off + PLL_ALPHA_VAL, config->alpha);
- regmap_write(regmap, off + PLL_CONFIG_CTL, config->config_ctl_val);
- regmap_write(regmap, off + PLL_CONFIG_CTL_U, config->config_ctl_hi_val);
+ regmap_write(regmap, PLL_L_VAL(pll), config->l);
+ regmap_write(regmap, PLL_ALPHA_VAL(pll), config->alpha);
+ regmap_write(regmap, PLL_CONFIG_CTL(pll), config->config_ctl_val);
+
+ if (pll_has_64bit_config(pll))
+ regmap_write(regmap, PLL_CONFIG_CTL_U(pll),
+ config->config_ctl_hi_val);
+
+ if (pll_alpha_width(pll) > 32)
+ regmap_write(regmap, PLL_ALPHA_VAL_U(pll), config->alpha_hi);
val = config->main_output_mask;
val |= config->aux_output_mask;
@@ -127,6 +192,8 @@ void clk_alpha_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
val |= config->pre_div_val;
val |= config->post_div_val;
val |= config->vco_val;
+ val |= config->alpha_en_mask;
+ val |= config->alpha_mode_mask;
mask = config->main_output_mask;
mask |= config->aux_output_mask;
@@ -136,20 +203,19 @@ void clk_alpha_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
mask |= config->post_div_mask;
mask |= config->vco_mask;
- regmap_update_bits(regmap, off + PLL_USER_CTL, mask, val);
+ regmap_update_bits(regmap, PLL_USER_CTL(pll), mask, val);
if (pll->flags & SUPPORTS_FSM_MODE)
- qcom_pll_set_fsm_mode(regmap, off + PLL_MODE, 6, 0);
+ qcom_pll_set_fsm_mode(regmap, PLL_MODE(pll), 6, 0);
}
static int clk_alpha_pll_hwfsm_enable(struct clk_hw *hw)
{
int ret;
- u32 val, off;
struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+ u32 val;
- off = pll->offset;
- ret = regmap_read(pll->clkr.regmap, off + PLL_MODE, &val);
+ ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
if (ret)
return ret;
@@ -158,7 +224,7 @@ static int clk_alpha_pll_hwfsm_enable(struct clk_hw *hw)
if (pll->flags & SUPPORTS_OFFLINE_REQ)
val &= ~PLL_OFFLINE_REQ;
- ret = regmap_write(pll->clkr.regmap, off + PLL_MODE, val);
+ ret = regmap_write(pll->clkr.regmap, PLL_MODE(pll), val);
if (ret)
return ret;
@@ -171,16 +237,15 @@ static int clk_alpha_pll_hwfsm_enable(struct clk_hw *hw)
static void clk_alpha_pll_hwfsm_disable(struct clk_hw *hw)
{
int ret;
- u32 val, off;
struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+ u32 val;
- off = pll->offset;
- ret = regmap_read(pll->clkr.regmap, off + PLL_MODE, &val);
+ ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
if (ret)
return;
if (pll->flags & SUPPORTS_OFFLINE_REQ) {
- ret = regmap_update_bits(pll->clkr.regmap, off + PLL_MODE,
+ ret = regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll),
PLL_OFFLINE_REQ, PLL_OFFLINE_REQ);
if (ret)
return;
@@ -191,7 +256,7 @@ static void clk_alpha_pll_hwfsm_disable(struct clk_hw *hw)
}
/* Disable hwfsm */
- ret = regmap_update_bits(pll->clkr.regmap, off + PLL_MODE,
+ ret = regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll),
PLL_FSM_ENA, 0);
if (ret)
return;
@@ -202,11 +267,10 @@ static void clk_alpha_pll_hwfsm_disable(struct clk_hw *hw)
static int pll_is_enabled(struct clk_hw *hw, u32 mask)
{
int ret;
- u32 val, off;
struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+ u32 val;
- off = pll->offset;
- ret = regmap_read(pll->clkr.regmap, off + PLL_MODE, &val);
+ ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
if (ret)
return ret;
@@ -227,12 +291,10 @@ static int clk_alpha_pll_enable(struct clk_hw *hw)
{
int ret;
struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
- u32 val, mask, off;
-
- off = pll->offset;
+ u32 val, mask;
mask = PLL_OUTCTRL | PLL_RESET_N | PLL_BYPASSNL;
- ret = regmap_read(pll->clkr.regmap, off + PLL_MODE, &val);
+ ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
if (ret)
return ret;
@@ -248,7 +310,7 @@ static int clk_alpha_pll_enable(struct clk_hw *hw)
if ((val & mask) == mask)
return 0;
- ret = regmap_update_bits(pll->clkr.regmap, off + PLL_MODE,
+ ret = regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll),
PLL_BYPASSNL, PLL_BYPASSNL);
if (ret)
return ret;
@@ -260,7 +322,7 @@ static int clk_alpha_pll_enable(struct clk_hw *hw)
mb();
udelay(5);
- ret = regmap_update_bits(pll->clkr.regmap, off + PLL_MODE,
+ ret = regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll),
PLL_RESET_N, PLL_RESET_N);
if (ret)
return ret;
@@ -269,7 +331,7 @@ static int clk_alpha_pll_enable(struct clk_hw *hw)
if (ret)
return ret;
- ret = regmap_update_bits(pll->clkr.regmap, off + PLL_MODE,
+ ret = regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll),
PLL_OUTCTRL, PLL_OUTCTRL);
/* Ensure that the write above goes through before returning. */
@@ -281,11 +343,9 @@ static void clk_alpha_pll_disable(struct clk_hw *hw)
{
int ret;
struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
- u32 val, mask, off;
-
- off = pll->offset;
+ u32 val, mask;
- ret = regmap_read(pll->clkr.regmap, off + PLL_MODE, &val);
+ ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
if (ret)
return;
@@ -296,23 +356,25 @@ static void clk_alpha_pll_disable(struct clk_hw *hw)
}
mask = PLL_OUTCTRL;
- regmap_update_bits(pll->clkr.regmap, off + PLL_MODE, mask, 0);
+ regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll), mask, 0);
/* Delay of 2 output clock ticks required until output is disabled */
mb();
udelay(1);
mask = PLL_RESET_N | PLL_BYPASSNL;
- regmap_update_bits(pll->clkr.regmap, off + PLL_MODE, mask, 0);
+ regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll), mask, 0);
}
-static unsigned long alpha_pll_calc_rate(u64 prate, u32 l, u32 a)
+static unsigned long
+alpha_pll_calc_rate(u64 prate, u32 l, u32 a, u32 alpha_width)
{
- return (prate * l) + ((prate * a) >> ALPHA_BITWIDTH);
+ return (prate * l) + ((prate * a) >> ALPHA_SHIFT(alpha_width));
}
static unsigned long
-alpha_pll_round_rate(unsigned long rate, unsigned long prate, u32 *l, u64 *a)
+alpha_pll_round_rate(unsigned long rate, unsigned long prate, u32 *l, u64 *a,
+ u32 alpha_width)
{
u64 remainder;
u64 quotient;
@@ -327,14 +389,15 @@ alpha_pll_round_rate(unsigned long rate, unsigned long prate, u32 *l, u64 *a)
}
/* Upper ALPHA_BITWIDTH bits of Alpha */
- quotient = remainder << ALPHA_BITWIDTH;
+ quotient = remainder << ALPHA_SHIFT(alpha_width);
+
remainder = do_div(quotient, prate);
if (remainder)
quotient++;
*a = quotient;
- return alpha_pll_calc_rate(prate, *l, *a);
+ return alpha_pll_calc_rate(prate, *l, *a, alpha_width);
}
static const struct pll_vco *
@@ -356,71 +419,138 @@ clk_alpha_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
u32 l, low, high, ctl;
u64 a = 0, prate = parent_rate;
struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
- u32 off = pll->offset;
+ u32 alpha_width = pll_alpha_width(pll);
- regmap_read(pll->clkr.regmap, off + PLL_L_VAL, &l);
+ regmap_read(pll->clkr.regmap, PLL_L_VAL(pll), &l);
- regmap_read(pll->clkr.regmap, off + PLL_USER_CTL, &ctl);
+ regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &ctl);
if (ctl & PLL_ALPHA_EN) {
- regmap_read(pll->clkr.regmap, off + PLL_ALPHA_VAL, &low);
- if (pll->flags & SUPPORTS_16BIT_ALPHA) {
- a = low & ALPHA_16BIT_MASK;
- } else {
- regmap_read(pll->clkr.regmap, off + PLL_ALPHA_VAL_U,
+ regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL(pll), &low);
+ if (alpha_width > 32) {
+ regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL_U(pll),
&high);
a = (u64)high << 32 | low;
- a >>= ALPHA_REG_BITWIDTH - ALPHA_BITWIDTH;
+ } else {
+ a = low & GENMASK(alpha_width - 1, 0);
}
+
+ if (alpha_width > ALPHA_BITWIDTH)
+ a >>= alpha_width - ALPHA_BITWIDTH;
}
- return alpha_pll_calc_rate(prate, l, a);
+ return alpha_pll_calc_rate(prate, l, a, alpha_width);
}
-static int clk_alpha_pll_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long prate)
+static int clk_alpha_pll_update_latch(struct clk_alpha_pll *pll,
+ int (*is_enabled)(struct clk_hw *))
+{
+ int ret;
+ u32 mode;
+
+ if (!is_enabled(&pll->clkr.hw) ||
+ !(pll->flags & SUPPORTS_DYNAMIC_UPDATE))
+ return 0;
+
+ regmap_read(pll->clkr.regmap, PLL_MODE(pll), &mode);
+
+ /* Latch the input to the PLL */
+ regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll), PLL_UPDATE,
+ PLL_UPDATE);
+
+ /* Wait for 2 reference cycle before checking ACK bit */
+ udelay(1);
+
+ /*
+ * PLL will latch the new L, Alpha and freq control word.
+ * PLL will respond by raising PLL_ACK_LATCH output when new programming
+ * has been latched in and PLL is being updated. When
+ * UPDATE_LOGIC_BYPASS bit is not set, PLL_UPDATE will be cleared
+ * automatically by hardware when PLL_ACK_LATCH is asserted by PLL.
+ */
+ if (mode & PLL_UPDATE_BYPASS) {
+ ret = wait_for_pll_update_ack_set(pll);
+ if (ret)
+ return ret;
+
+ regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll), PLL_UPDATE, 0);
+ } else {
+ ret = wait_for_pll_update(pll);
+ if (ret)
+ return ret;
+ }
+
+ ret = wait_for_pll_update_ack_clear(pll);
+ if (ret)
+ return ret;
+
+ /* Wait for PLL output to stabilize */
+ udelay(10);
+
+ return 0;
+}
+
+static int __clk_alpha_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long prate,
+ int (*is_enabled)(struct clk_hw *))
{
struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
const struct pll_vco *vco;
- u32 l, off = pll->offset;
+ u32 l, alpha_width = pll_alpha_width(pll);
u64 a;
- rate = alpha_pll_round_rate(rate, prate, &l, &a);
+ rate = alpha_pll_round_rate(rate, prate, &l, &a, alpha_width);
vco = alpha_pll_find_vco(pll, rate);
- if (!vco) {
+ if (pll->vco_table && !vco) {
pr_err("alpha pll not in a valid vco range\n");
return -EINVAL;
}
- regmap_write(pll->clkr.regmap, off + PLL_L_VAL, l);
+ regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l);
- if (pll->flags & SUPPORTS_16BIT_ALPHA) {
- regmap_write(pll->clkr.regmap, off + PLL_ALPHA_VAL,
- a & ALPHA_16BIT_MASK);
- } else {
- a <<= (ALPHA_REG_BITWIDTH - ALPHA_BITWIDTH);
- regmap_write(pll->clkr.regmap, off + PLL_ALPHA_VAL_U, a >> 32);
+ if (alpha_width > ALPHA_BITWIDTH)
+ a <<= alpha_width - ALPHA_BITWIDTH;
+
+ if (alpha_width > 32)
+ regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL_U(pll), a >> 32);
+
+ regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL(pll), a);
+
+ if (vco) {
+ regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
+ PLL_VCO_MASK << PLL_VCO_SHIFT,
+ vco->val << PLL_VCO_SHIFT);
}
- regmap_update_bits(pll->clkr.regmap, off + PLL_USER_CTL,
- PLL_VCO_MASK << PLL_VCO_SHIFT,
- vco->val << PLL_VCO_SHIFT);
+ regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
+ PLL_ALPHA_EN, PLL_ALPHA_EN);
- regmap_update_bits(pll->clkr.regmap, off + PLL_USER_CTL, PLL_ALPHA_EN,
- PLL_ALPHA_EN);
+ return clk_alpha_pll_update_latch(pll, is_enabled);
+}
- return 0;
+static int clk_alpha_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long prate)
+{
+ return __clk_alpha_pll_set_rate(hw, rate, prate,
+ clk_alpha_pll_is_enabled);
+}
+
+static int clk_alpha_pll_hwfsm_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long prate)
+{
+ return __clk_alpha_pll_set_rate(hw, rate, prate,
+ clk_alpha_pll_hwfsm_is_enabled);
}
static long clk_alpha_pll_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
- u32 l;
+ u32 l, alpha_width = pll_alpha_width(pll);
u64 a;
unsigned long min_freq, max_freq;
- rate = alpha_pll_round_rate(rate, *prate, &l, &a);
- if (alpha_pll_find_vco(pll, rate))
+ rate = alpha_pll_round_rate(rate, *prate, &l, &a, alpha_width);
+ if (!pll->vco_table || alpha_pll_find_vco(pll, rate))
return rate;
min_freq = pll->vco_table[0].min_freq;
@@ -429,6 +559,158 @@ static long clk_alpha_pll_round_rate(struct clk_hw *hw, unsigned long rate,
return clamp(rate, min_freq, max_freq);
}
+static unsigned long
+alpha_huayra_pll_calc_rate(u64 prate, u32 l, u32 a)
+{
+ /*
+ * a contains 16 bit alpha_val in two’s compliment number in the range
+ * of [-0.5, 0.5).
+ */
+ if (a >= BIT(PLL_HUAYRA_ALPHA_WIDTH - 1))
+ l -= 1;
+
+ return (prate * l) + (prate * a >> PLL_HUAYRA_ALPHA_WIDTH);
+}
+
+static unsigned long
+alpha_huayra_pll_round_rate(unsigned long rate, unsigned long prate,
+ u32 *l, u32 *a)
+{
+ u64 remainder;
+ u64 quotient;
+
+ quotient = rate;
+ remainder = do_div(quotient, prate);
+ *l = quotient;
+
+ if (!remainder) {
+ *a = 0;
+ return rate;
+ }
+
+ quotient = remainder << PLL_HUAYRA_ALPHA_WIDTH;
+ remainder = do_div(quotient, prate);
+
+ if (remainder)
+ quotient++;
+
+ /*
+ * alpha_val should be in two’s compliment number in the range
+ * of [-0.5, 0.5) so if quotient >= 0.5 then increment the l value
+ * since alpha value will be subtracted in this case.
+ */
+ if (quotient >= BIT(PLL_HUAYRA_ALPHA_WIDTH - 1))
+ *l += 1;
+
+ *a = quotient;
+ return alpha_huayra_pll_calc_rate(prate, *l, *a);
+}
+
+static unsigned long
+alpha_pll_huayra_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
+{
+ u64 rate = parent_rate, tmp;
+ struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+ u32 l, alpha = 0, ctl, alpha_m, alpha_n;
+
+ regmap_read(pll->clkr.regmap, PLL_L_VAL(pll), &l);
+ regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &ctl);
+
+ if (ctl & PLL_ALPHA_EN) {
+ regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL(pll), &alpha);
+ /*
+ * Depending upon alpha_mode, it can be treated as M/N value or
+ * as a two’s compliment number. When alpha_mode=1,
+ * pll_alpha_val<15:8>=M and pll_apla_val<7:0>=N
+ *
+ * Fout=FIN*(L+(M/N))
+ *
+ * M is a signed number (-128 to 127) and N is unsigned
+ * (0 to 255). M/N has to be within +/-0.5.
+ *
+ * When alpha_mode=0, it is a two’s compliment number in the
+ * range [-0.5, 0.5).
+ *
+ * Fout=FIN*(L+(alpha_val)/2^16)
+ *
+ * where alpha_val is two’s compliment number.
+ */
+ if (!(ctl & PLL_ALPHA_MODE))
+ return alpha_huayra_pll_calc_rate(rate, l, alpha);
+
+ alpha_m = alpha >> PLL_HUAYRA_M_SHIFT & PLL_HUAYRA_M_MASK;
+ alpha_n = alpha >> PLL_HUAYRA_N_SHIFT & PLL_HUAYRA_N_MASK;
+
+ rate *= l;
+ tmp = parent_rate;
+ if (alpha_m >= BIT(PLL_HUAYRA_M_WIDTH - 1)) {
+ alpha_m = BIT(PLL_HUAYRA_M_WIDTH) - alpha_m;
+ tmp *= alpha_m;
+ do_div(tmp, alpha_n);
+ rate -= tmp;
+ } else {
+ tmp *= alpha_m;
+ do_div(tmp, alpha_n);
+ rate += tmp;
+ }
+
+ return rate;
+ }
+
+ return alpha_huayra_pll_calc_rate(rate, l, alpha);
+}
+
+static int alpha_pll_huayra_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long prate)
+{
+ struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+ u32 l, a, ctl, cur_alpha = 0;
+
+ rate = alpha_huayra_pll_round_rate(rate, prate, &l, &a);
+
+ regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &ctl);
+
+ if (ctl & PLL_ALPHA_EN)
+ regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL(pll), &cur_alpha);
+
+ /*
+ * Huayra PLL supports PLL dynamic programming. User can change L_VAL,
+ * without having to go through the power on sequence.
+ */
+ if (clk_alpha_pll_is_enabled(hw)) {
+ if (cur_alpha != a) {
+ pr_err("clock needs to be gated %s\n",
+ clk_hw_get_name(hw));
+ return -EBUSY;
+ }
+
+ regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l);
+ /* Ensure that the write above goes to detect L val change. */
+ mb();
+ return wait_for_pll_enable_lock(pll);
+ }
+
+ regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l);
+ regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL(pll), a);
+
+ if (a == 0)
+ regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
+ PLL_ALPHA_EN, 0x0);
+ else
+ regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
+ PLL_ALPHA_EN | PLL_ALPHA_MODE, PLL_ALPHA_EN);
+
+ return 0;
+}
+
+static long alpha_pll_huayra_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *prate)
+{
+ u32 l, a;
+
+ return alpha_huayra_pll_round_rate(rate, *prate, &l, &a);
+}
+
const struct clk_ops clk_alpha_pll_ops = {
.enable = clk_alpha_pll_enable,
.disable = clk_alpha_pll_disable,
@@ -439,13 +721,23 @@ const struct clk_ops clk_alpha_pll_ops = {
};
EXPORT_SYMBOL_GPL(clk_alpha_pll_ops);
+const struct clk_ops clk_alpha_pll_huayra_ops = {
+ .enable = clk_alpha_pll_enable,
+ .disable = clk_alpha_pll_disable,
+ .is_enabled = clk_alpha_pll_is_enabled,
+ .recalc_rate = alpha_pll_huayra_recalc_rate,
+ .round_rate = alpha_pll_huayra_round_rate,
+ .set_rate = alpha_pll_huayra_set_rate,
+};
+EXPORT_SYMBOL_GPL(clk_alpha_pll_huayra_ops);
+
const struct clk_ops clk_alpha_pll_hwfsm_ops = {
.enable = clk_alpha_pll_hwfsm_enable,
.disable = clk_alpha_pll_hwfsm_disable,
.is_enabled = clk_alpha_pll_hwfsm_is_enabled,
.recalc_rate = clk_alpha_pll_recalc_rate,
.round_rate = clk_alpha_pll_round_rate,
- .set_rate = clk_alpha_pll_set_rate,
+ .set_rate = clk_alpha_pll_hwfsm_set_rate,
};
EXPORT_SYMBOL_GPL(clk_alpha_pll_hwfsm_ops);
@@ -455,10 +747,10 @@ clk_alpha_pll_postdiv_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw);
u32 ctl;
- regmap_read(pll->clkr.regmap, pll->offset + PLL_USER_CTL, &ctl);
+ regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &ctl);
ctl >>= PLL_POST_DIV_SHIFT;
- ctl &= PLL_POST_DIV_MASK;
+ ctl &= PLL_POST_DIV_MASK(pll);
return parent_rate >> fls(ctl);
}
@@ -472,16 +764,48 @@ static const struct clk_div_table clk_alpha_div_table[] = {
{ }
};
+static const struct clk_div_table clk_alpha_2bit_div_table[] = {
+ { 0x0, 1 },
+ { 0x1, 2 },
+ { 0x3, 4 },
+ { }
+};
+
static long
clk_alpha_pll_postdiv_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw);
+ const struct clk_div_table *table;
- return divider_round_rate(hw, rate, prate, clk_alpha_div_table,
+ if (pll->width == 2)
+ table = clk_alpha_2bit_div_table;
+ else
+ table = clk_alpha_div_table;
+
+ return divider_round_rate(hw, rate, prate, table,
pll->width, CLK_DIVIDER_POWER_OF_TWO);
}
+static long
+clk_alpha_pll_postdiv_round_ro_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *prate)
+{
+ struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw);
+ u32 ctl, div;
+
+ regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &ctl);
+
+ ctl >>= PLL_POST_DIV_SHIFT;
+ ctl &= BIT(pll->width) - 1;
+ div = 1 << fls(ctl);
+
+ if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT)
+ *prate = clk_hw_round_rate(clk_hw_get_parent(hw), div * rate);
+
+ return DIV_ROUND_UP_ULL((u64)*prate, div);
+}
+
static int clk_alpha_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
@@ -491,8 +815,8 @@ static int clk_alpha_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate,
/* 16 -> 0xf, 8 -> 0x7, 4 -> 0x3, 2 -> 0x1, 1 -> 0x0 */
div = DIV_ROUND_UP_ULL((u64)parent_rate, rate) - 1;
- return regmap_update_bits(pll->clkr.regmap, pll->offset + PLL_USER_CTL,
- PLL_POST_DIV_MASK << PLL_POST_DIV_SHIFT,
+ return regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
+ PLL_POST_DIV_MASK(pll) << PLL_POST_DIV_SHIFT,
div << PLL_POST_DIV_SHIFT);
}
@@ -502,3 +826,9 @@ const struct clk_ops clk_alpha_pll_postdiv_ops = {
.set_rate = clk_alpha_pll_postdiv_set_rate,
};
EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_ops);
+
+const struct clk_ops clk_alpha_pll_postdiv_ro_ops = {
+ .round_rate = clk_alpha_pll_postdiv_round_ro_rate,
+ .recalc_rate = clk_alpha_pll_postdiv_recalc_rate,
+};
+EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_ro_ops);