[PATCH v1 1/1] clk: mmp: Switch to use struct u32_fract instead of custom one

Andy Shevchenko
2023-07-24T09:52:40Z

The struct mmp_clk_factor_tbl repeats the generic struct u32_fract.
Kill the custom one and use the generic one instead.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/clk/mmp/clk-frac.c | 57 ++++++++++++++++----------------
drivers/clk/mmp/clk-mmp2.c | 6 ++--
drivers/clk/mmp/clk-of-mmp2.c | 26 +++++++--------
drivers/clk/mmp/clk-of-pxa168.c | 4 +--
drivers/clk/mmp/clk-of-pxa1928.c | 6 ++--
drivers/clk/mmp/clk-of-pxa910.c | 4 +--
drivers/clk/mmp/clk-pxa168.c | 4 +--
drivers/clk/mmp/clk-pxa910.c | 4 +--
drivers/clk/mmp/clk.h | 10 ++----
9 files changed, 58 insertions(+), 63 deletions(-)

diff --git a/drivers/clk/mmp/clk-frac.c b/drivers/clk/mmp/clk-frac.c
index 1b90867b60c4..6556f6ada2e8 100644
--- a/drivers/clk/mmp/clk-frac.c
+++ b/drivers/clk/mmp/clk-frac.c
@@ -26,14 +26,15 @@ static long clk_factor_round_rate(struct clk_hw *hw, unsigned long drate,
{
struct mmp_clk_factor *factor = to_clk_factor(hw);
u64 rate = 0, prev_rate;
+ struct u32_fract *d;
int i;

for (i = 0; i < factor->ftbl_cnt; i++) {
+ d = &factor->ftbl[i];
+
prev_rate = rate;
- rate = *prate;
- rate *= factor->ftbl[i].den;
- do_div(rate, factor->ftbl[i].num * factor->masks->factor);
-
+ rate = (u64)(*prate) * d->denominator;
+ do_div(rate, d->numerator * factor->masks->factor);
if (rate > drate)
break;
}
@@ -52,23 +53,22 @@ static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
{
struct mmp_clk_factor *factor = to_clk_factor(hw);
struct mmp_clk_factor_masks *masks = factor->masks;
- unsigned int val, num, den;
+ struct u32_fract d;
+ unsigned int val;
u64 rate;

val = readl_relaxed(factor->base);

/* calculate numerator */
- num = (val >> masks->num_shift) & masks->num_mask;
+ d.numerator = (val >> masks->num_shift) & masks->num_mask;

/* calculate denominator */
- den = (val >> masks->den_shift) & masks->den_mask;
-
- if (!den)
+ d.denominator = (val >> masks->den_shift) & masks->den_mask;
+ if (!d.denominator)
return 0;

- rate = parent_rate;
- rate *= den;
- do_div(rate, num * factor->masks->factor);
+ rate = (u64)parent_rate * d.denominator;
+ do_div(rate, d.numerator * factor->masks->factor);

return rate;
}
@@ -82,18 +82,18 @@ static int clk_factor_set_rate(struct clk_hw *hw, unsigned long drate,
int i;
unsigned long val;
unsigned long flags = 0;
+ struct u32_fract *d;
u64 rate = 0;

for (i = 0; i < factor->ftbl_cnt; i++) {
- rate = prate;
- rate *= factor->ftbl[i].den;
- do_div(rate, factor->ftbl[i].num * factor->masks->factor);
+ d = &factor->ftbl[i];

+ rate = (u64)prate * d->denominator;
+ do_div(rate, d->numerator * factor->masks->factor);
if (rate > drate)
break;
}
- if (i > 0)
- i--;
+ d = i ? &factor->ftbl[i - 1] : &factor->ftbl[0];

if (factor->lock)
spin_lock_irqsave(factor->lock, flags);
@@ -101,10 +101,10 @@ static int clk_factor_set_rate(struct clk_hw *hw, unsigned long drate,
val = readl_relaxed(factor->base);

val &= ~(masks->num_mask << masks->num_shift);
- val |= (factor->ftbl[i].num & masks->num_mask) << masks->num_shift;
+ val |= (d->numerator & masks->num_mask) << masks->num_shift;

val &= ~(masks->den_mask << masks->den_shift);
- val |= (factor->ftbl[i].den & masks->den_mask) << masks->den_shift;
+ val |= (d->denominator & masks->den_mask) << masks->den_shift;

writel_relaxed(val, factor->base);

@@ -118,7 +118,8 @@ static int clk_factor_init(struct clk_hw *hw)
{
struct mmp_clk_factor *factor = to_clk_factor(hw);
struct mmp_clk_factor_masks *masks = factor->masks;
- u32 val, num, den;
+ struct u32_fract d;
+ u32 val;
int i;
unsigned long flags = 0;

@@ -128,23 +129,22 @@ static int clk_factor_init(struct clk_hw *hw)
val = readl(factor->base);

/* calculate numerator */
- num = (val >> masks->num_shift) & masks->num_mask;
+ d.numerator = (val >> masks->num_shift) & masks->num_mask;

/* calculate denominator */
- den = (val >> masks->den_shift) & masks->den_mask;
+ d.denominator = (val >> masks->den_shift) & masks->den_mask;

for (i = 0; i < factor->ftbl_cnt; i++)
- if (den == factor->ftbl[i].den && num == factor->ftbl[i].num)
+ if (d.denominator == factor->ftbl[i].denominator &&
+ d.numerator == factor->ftbl[i].numerator)
break;

if (i >= factor->ftbl_cnt) {
val &= ~(masks->num_mask << masks->num_shift);
- val |= (factor->ftbl[0].num & masks->num_mask) <<
- masks->num_shift;
+ val |= (factor->ftbl[0].numerator & masks->num_mask) << masks->num_shift;

val &= ~(masks->den_mask << masks->den_shift);
- val |= (factor->ftbl[0].den & masks->den_mask) <<
- masks->den_shift;
+ val |= (factor->ftbl[0].denominator & masks->den_mask) << masks->den_shift;
}

if (!(val & masks->enable_mask) || i >= factor->ftbl_cnt) {
@@ -168,8 +168,7 @@ static const struct clk_ops clk_factor_ops = {
struct clk *mmp_clk_register_factor(const char *name, const char *parent_name,
unsigned long flags, void __iomem *base,
struct mmp_clk_factor_masks *masks,
- struct mmp_clk_factor_tbl *ftbl,
- unsigned int ftbl_cnt, spinlock_t *lock)
+ struct u32_fract *ftbl, unsigned int ftbl_cnt, spinlock_t *lock)
{
struct mmp_clk_factor *factor;
struct clk_init_data init;
diff --git a/drivers/clk/mmp/clk-mmp2.c b/drivers/clk/mmp/clk-mmp2.c
index aabacfa10158..ab7dde7e7a44 100644
--- a/drivers/clk/mmp/clk-mmp2.c
+++ b/drivers/clk/mmp/clk-mmp2.c
@@ -59,9 +59,9 @@ static struct mmp_clk_factor_masks uart_factor_masks = {
.den_shift = 0,
};

-static struct mmp_clk_factor_tbl uart_factor_tbl[] = {
- {.num = 8125, .den = 1536}, /*14.745MHZ */
- {.num = 3521, .den = 689}, /*19.23MHZ */
+static struct u32_fract uart_factor_tbl[] = {
+ { .numerator = 8125, .denominator = 1536 }, /* 14.745MHZ */
+ { .numerator = 3521, .denominator = 689 }, /* 19.23MHZ */
};

static const char *uart_parent[] = {"uart_pll", "vctcxo"};
diff --git a/drivers/clk/mmp/clk-of-mmp2.c b/drivers/clk/mmp/clk-of-mmp2.c
index bcf60f43aa13..d771b3e5fb2d 100644
--- a/drivers/clk/mmp/clk-of-mmp2.c
+++ b/drivers/clk/mmp/clk-of-mmp2.c
@@ -141,9 +141,9 @@ static struct mmp_clk_factor_masks uart_factor_masks = {
.den_shift = 0,
};

-static struct mmp_clk_factor_tbl uart_factor_tbl[] = {
- {.num = 8125, .den = 1536}, /*14.745MHZ */
- {.num = 3521, .den = 689}, /*19.23MHZ */
+static struct u32_fract uart_factor_tbl[] = {
+ { .numerator = 8125, .denominator = 1536 }, /* 14.745MHZ */
+ { .numerator = 3521, .denominator = 689 }, /* 19.23MHZ */
};

static struct mmp_clk_factor_masks i2s_factor_masks = {
@@ -155,16 +155,16 @@ static struct mmp_clk_factor_masks i2s_factor_masks = {
.enable_mask = 0xd0000000,
};

-static struct mmp_clk_factor_tbl i2s_factor_tbl[] = {
- {.num = 24868, .den = 511}, /* 2.0480 MHz */
- {.num = 28003, .den = 793}, /* 2.8224 MHz */
- {.num = 24941, .den = 1025}, /* 4.0960 MHz */
- {.num = 28003, .den = 1586}, /* 5.6448 MHz */
- {.num = 31158, .den = 2561}, /* 8.1920 MHz */
- {.num = 16288, .den = 1845}, /* 11.2896 MHz */
- {.num = 20772, .den = 2561}, /* 12.2880 MHz */
- {.num = 8144, .den = 1845}, /* 22.5792 MHz */
- {.num = 10386, .den = 2561}, /* 24.5760 MHz */
+static struct u32_fract i2s_factor_tbl[] = {
+ { .numerator = 24868, .denominator = 511 }, /* 2.0480 MHz */
+ { .numerator = 28003, .denominator = 793 }, /* 2.8224 MHz */
+ { .numerator = 24941, .denominator = 1025 }, /* 4.0960 MHz */
+ { .numerator = 28003, .denominator = 1586 }, /* 5.6448 MHz */
+ { .numerator = 31158, .denominator = 2561 }, /* 8.1920 MHz */
+ { .numerator = 16288, .denominator = 1845 }, /* 11.2896 MHz */
+ { .numerator = 20772, .denominator = 2561 }, /* 12.2880 MHz */
+ { .numerator = 8144, .denominator = 1845 }, /* 22.5792 MHz */
+ { .numerator = 10386, .denominator = 2561 }, /* 24.5760 MHz */
};

static DEFINE_SPINLOCK(acgr_lock);
diff --git a/drivers/clk/mmp/clk-of-pxa168.c b/drivers/clk/mmp/clk-of-pxa168.c
index 130d1a723879..17cb5c622c31 100644
--- a/drivers/clk/mmp/clk-of-pxa168.c
+++ b/drivers/clk/mmp/clk-of-pxa168.c
@@ -104,8 +104,8 @@ static struct mmp_clk_factor_masks uart_factor_masks = {
.den_shift = 0,
};

-static struct mmp_clk_factor_tbl uart_factor_tbl[] = {
- {.num = 8125, .den = 1536}, /*14.745MHZ */
+static struct u32_fract uart_factor_tbl[] = {
+ { .numerator = 8125, .denominator = 1536 }, /* 14.745MHZ */
};

static void pxa168_pll_init(struct pxa168_clk_unit *pxa_unit)
diff --git a/drivers/clk/mmp/clk-of-pxa1928.c b/drivers/clk/mmp/clk-of-pxa1928.c
index 2508a0d795f8..675d695c5f7d 100644
--- a/drivers/clk/mmp/clk-of-pxa1928.c
+++ b/drivers/clk/mmp/clk-of-pxa1928.c
@@ -58,9 +58,9 @@ static struct mmp_clk_factor_masks uart_factor_masks = {
.den_shift = 0,
};

-static struct mmp_clk_factor_tbl uart_factor_tbl[] = {
- {.num = 832, .den = 234}, /*58.5MHZ */
- {.num = 1, .den = 1}, /*26MHZ */
+static struct u32_fract uart_factor_tbl[] = {
+ { .numerator = 832, .denominator = 234 }, /* 58.5MHZ */
+ { .numerator = 1, .denominator = 1 }, /* 26MHZ */
};

static void pxa1928_pll_init(struct pxa1928_clk_unit *pxa_unit)
diff --git a/drivers/clk/mmp/clk-of-pxa910.c b/drivers/clk/mmp/clk-of-pxa910.c
index 4d15bac987eb..f5b0b7b278c0 100644
--- a/drivers/clk/mmp/clk-of-pxa910.c
+++ b/drivers/clk/mmp/clk-of-pxa910.c
@@ -84,8 +84,8 @@ static struct mmp_clk_factor_masks uart_factor_masks = {
.den_shift = 0,
};

-static struct mmp_clk_factor_tbl uart_factor_tbl[] = {
- {.num = 8125, .den = 1536}, /*14.745MHZ */
+static struct u32_fract uart_factor_tbl[] = {
+ { .numerator = 8125, .denominator = 1536 }, /* 14.745MHZ */
};

static void pxa910_pll_init(struct pxa910_clk_unit *pxa_unit)
diff --git a/drivers/clk/mmp/clk-pxa168.c b/drivers/clk/mmp/clk-pxa168.c
index 8a9b8fb3a465..2ea88945bffd 100644
--- a/drivers/clk/mmp/clk-pxa168.c
+++ b/drivers/clk/mmp/clk-pxa168.c
@@ -52,8 +52,8 @@ static struct mmp_clk_factor_masks uart_factor_masks = {
.den_shift = 0,
};

-static struct mmp_clk_factor_tbl uart_factor_tbl[] = {
- {.num = 8125, .den = 1536}, /*14.745MHZ */
+static struct u32_fract uart_factor_tbl[] = {
+ { .numerator = 8125, .denominator = 1536 }, /* 14.745MHZ */
};

static const char *uart_parent[] = {"pll1_3_16", "uart_pll"};
diff --git a/drivers/clk/mmp/clk-pxa910.c b/drivers/clk/mmp/clk-pxa910.c
index 9fcd76316d7e..e29b0fd6f423 100644
--- a/drivers/clk/mmp/clk-pxa910.c
+++ b/drivers/clk/mmp/clk-pxa910.c
@@ -50,8 +50,8 @@ static struct mmp_clk_factor_masks uart_factor_masks = {
.den_shift = 0,
};

-static struct mmp_clk_factor_tbl uart_factor_tbl[] = {
- {.num = 8125, .den = 1536}, /*14.745MHZ */
+static struct u32_fract uart_factor_tbl[] = {
+ { .numerator = 8125, .denominator = 1536 }, /* 14.745MHZ */
};

static const char *uart_parent[] = {"pll1_3_16", "uart_pll"};
diff --git a/drivers/clk/mmp/clk.h b/drivers/clk/mmp/clk.h
index 55ac05379781..c83cec169ddc 100644
--- a/drivers/clk/mmp/clk.h
+++ b/drivers/clk/mmp/clk.h
@@ -3,6 +3,7 @@
#define __MACH_MMP_CLK_H

#include <linux/clk-provider.h>
+#include <linux/math.h>
#include <linux/pm_domain.h>
#include <linux/clkdev.h>

@@ -20,16 +21,11 @@ struct mmp_clk_factor_masks {
unsigned int enable_mask;
};

-struct mmp_clk_factor_tbl {
- unsigned int num;
- unsigned int den;
-};
-
struct mmp_clk_factor {
struct clk_hw hw;
void __iomem *base;
struct mmp_clk_factor_masks *masks;
- struct mmp_clk_factor_tbl *ftbl;
+ struct u32_fract *ftbl;
unsigned int ftbl_cnt;
spinlock_t *lock;
};
@@ -37,7 +33,7 @@ struct mmp_clk_factor {
extern struct clk *mmp_clk_register_factor(const char *name,
const char *parent_name, unsigned long flags,
void __iomem *base, struct mmp_clk_factor_masks *masks,
- struct mmp_clk_factor_tbl *ftbl, unsigned int ftbl_cnt,
+ struct u32_fract *ftbl, unsigned int ftbl_cnt,
spinlock_t *lock);

/* Clock type "mix" */
--
2.40.0.1.gaa8946217a0b