summaryrefslogtreecommitdiffstats
path: root/drivers/clk/samsung/clk-pll.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/clk/samsung/clk-pll.c')
-rw-r--r--drivers/clk/samsung/clk-pll.c701
1 files changed, 553 insertions, 148 deletions
diff --git a/drivers/clk/samsung/clk-pll.c b/drivers/clk/samsung/clk-pll.c
index 362f12dcd944..529e11dc2c6b 100644
--- a/drivers/clk/samsung/clk-pll.c
+++ b/drivers/clk/samsung/clk-pll.c
@@ -10,31 +10,73 @@
*/
#include <linux/errno.h>
+#include <linux/hrtimer.h>
#include "clk.h"
#include "clk-pll.h"
+#define PLL_TIMEOUT_MS 10
+
+struct samsung_clk_pll {
+ struct clk_hw hw;
+ void __iomem *lock_reg;
+ void __iomem *con_reg;
+ enum samsung_pll_type type;
+ unsigned int rate_count;
+ const struct samsung_pll_rate_table *rate_table;
+};
+
+#define to_clk_pll(_hw) container_of(_hw, struct samsung_clk_pll, hw)
+
+static const struct samsung_pll_rate_table *samsung_get_pll_settings(
+ struct samsung_clk_pll *pll, unsigned long rate)
+{
+ const struct samsung_pll_rate_table *rate_table = pll->rate_table;
+ int i;
+
+ for (i = 0; i < pll->rate_count; i++) {
+ if (rate == rate_table[i].rate)
+ return &rate_table[i];
+ }
+
+ return NULL;
+}
+
+static long samsung_pll_round_rate(struct clk_hw *hw,
+ unsigned long drate, unsigned long *prate)
+{
+ struct samsung_clk_pll *pll = to_clk_pll(hw);
+ const struct samsung_pll_rate_table *rate_table = pll->rate_table;
+ int i;
+
+ /* Assumming rate_table is in descending order */
+ for (i = 0; i < pll->rate_count; i++) {
+ if (drate >= rate_table[i].rate)
+ return rate_table[i].rate;
+ }
+
+ /* return minimum supported value */
+ return rate_table[i - 1].rate;
+}
+
/*
* PLL35xx Clock Type
*/
+/* Maximum lock time can be 270 * PDIV cycles */
+#define PLL35XX_LOCK_FACTOR (270)
#define PLL35XX_MDIV_MASK (0x3FF)
#define PLL35XX_PDIV_MASK (0x3F)
#define PLL35XX_SDIV_MASK (0x7)
+#define PLL35XX_LOCK_STAT_MASK (0x1)
#define PLL35XX_MDIV_SHIFT (16)
#define PLL35XX_PDIV_SHIFT (8)
#define PLL35XX_SDIV_SHIFT (0)
-
-struct samsung_clk_pll35xx {
- struct clk_hw hw;
- const void __iomem *con_reg;
-};
-
-#define to_clk_pll35xx(_hw) container_of(_hw, struct samsung_clk_pll35xx, hw)
+#define PLL35XX_LOCK_STAT_SHIFT (29)
static unsigned long samsung_pll35xx_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
- struct samsung_clk_pll35xx *pll = to_clk_pll35xx(hw);
+ struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 mdiv, pdiv, sdiv, pll_con;
u64 fvco = parent_rate;
@@ -49,48 +91,80 @@ static unsigned long samsung_pll35xx_recalc_rate(struct clk_hw *hw,
return (unsigned long)fvco;
}
-static const struct clk_ops samsung_pll35xx_clk_ops = {
- .recalc_rate = samsung_pll35xx_recalc_rate,
-};
-
-struct clk * __init samsung_clk_register_pll35xx(const char *name,
- const char *pname, const void __iomem *con_reg)
+static inline bool samsung_pll35xx_mp_change(
+ const struct samsung_pll_rate_table *rate, u32 pll_con)
{
- struct samsung_clk_pll35xx *pll;
- struct clk *clk;
- struct clk_init_data init;
+ u32 old_mdiv, old_pdiv;
- pll = kzalloc(sizeof(*pll), GFP_KERNEL);
- if (!pll) {
- pr_err("%s: could not allocate pll clk %s\n", __func__, name);
- return NULL;
+ old_mdiv = (pll_con >> PLL35XX_MDIV_SHIFT) & PLL35XX_MDIV_MASK;
+ old_pdiv = (pll_con >> PLL35XX_PDIV_SHIFT) & PLL35XX_PDIV_MASK;
+
+ return (rate->mdiv != old_mdiv || rate->pdiv != old_pdiv);
+}
+
+static int samsung_pll35xx_set_rate(struct clk_hw *hw, unsigned long drate,
+ unsigned long prate)
+{
+ struct samsung_clk_pll *pll = to_clk_pll(hw);
+ const struct samsung_pll_rate_table *rate;
+ u32 tmp;
+
+ /* Get required rate settings from table */
+ rate = samsung_get_pll_settings(pll, drate);
+ if (!rate) {
+ pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
+ drate, __clk_get_name(hw->clk));
+ return -EINVAL;
}
- init.name = name;
- init.ops = &samsung_pll35xx_clk_ops;
- init.flags = CLK_GET_RATE_NOCACHE;
- init.parent_names = &pname;
- init.num_parents = 1;
+ tmp = __raw_readl(pll->con_reg);
- pll->hw.init = &init;
- pll->con_reg = con_reg;
+ if (!(samsung_pll35xx_mp_change(rate, tmp))) {
+ /* If only s change, change just s value only*/
+ tmp &= ~(PLL35XX_SDIV_MASK << PLL35XX_SDIV_SHIFT);
+ tmp |= rate->sdiv << PLL35XX_SDIV_SHIFT;
+ __raw_writel(tmp, pll->con_reg);
- clk = clk_register(NULL, &pll->hw);
- if (IS_ERR(clk)) {
- pr_err("%s: failed to register pll clock %s\n", __func__,
- name);
- kfree(pll);
+ return 0;
}
- if (clk_register_clkdev(clk, name, NULL))
- pr_err("%s: failed to register lookup for %s", __func__, name);
-
- return clk;
+ /* Set PLL lock time. */
+ __raw_writel(rate->pdiv * PLL35XX_LOCK_FACTOR,
+ pll->lock_reg);
+
+ /* Change PLL PMS values */
+ tmp &= ~((PLL35XX_MDIV_MASK << PLL35XX_MDIV_SHIFT) |
+ (PLL35XX_PDIV_MASK << PLL35XX_PDIV_SHIFT) |
+ (PLL35XX_SDIV_MASK << PLL35XX_SDIV_SHIFT));
+ tmp |= (rate->mdiv << PLL35XX_MDIV_SHIFT) |
+ (rate->pdiv << PLL35XX_PDIV_SHIFT) |
+ (rate->sdiv << PLL35XX_SDIV_SHIFT);
+ __raw_writel(tmp, pll->con_reg);
+
+ /* wait_lock_time */
+ do {
+ cpu_relax();
+ tmp = __raw_readl(pll->con_reg);
+ } while (!(tmp & (PLL35XX_LOCK_STAT_MASK
+ << PLL35XX_LOCK_STAT_SHIFT)));
+ return 0;
}
+static const struct clk_ops samsung_pll35xx_clk_ops = {
+ .recalc_rate = samsung_pll35xx_recalc_rate,
+ .round_rate = samsung_pll_round_rate,
+ .set_rate = samsung_pll35xx_set_rate,
+};
+
+static const struct clk_ops samsung_pll35xx_clk_min_ops = {
+ .recalc_rate = samsung_pll35xx_recalc_rate,
+};
+
/*
* PLL36xx Clock Type
*/
+/* Maximum lock time can be 3000 * PDIV cycles */
+#define PLL36XX_LOCK_FACTOR (3000)
#define PLL36XX_KDIV_MASK (0xFFFF)
#define PLL36XX_MDIV_MASK (0x1FF)
@@ -99,18 +173,13 @@ struct clk * __init samsung_clk_register_pll35xx(const char *name,
#define PLL36XX_MDIV_SHIFT (16)
#define PLL36XX_PDIV_SHIFT (8)
#define PLL36XX_SDIV_SHIFT (0)
-
-struct samsung_clk_pll36xx {
- struct clk_hw hw;
- const void __iomem *con_reg;
-};
-
-#define to_clk_pll36xx(_hw) container_of(_hw, struct samsung_clk_pll36xx, hw)
+#define PLL36XX_KDIV_SHIFT (0)
+#define PLL36XX_LOCK_STAT_SHIFT (29)
static unsigned long samsung_pll36xx_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
- struct samsung_clk_pll36xx *pll = to_clk_pll36xx(hw);
+ struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 mdiv, pdiv, sdiv, pll_con0, pll_con1;
s16 kdiv;
u64 fvco = parent_rate;
@@ -129,68 +198,102 @@ static unsigned long samsung_pll36xx_recalc_rate(struct clk_hw *hw,
return (unsigned long)fvco;
}
-static const struct clk_ops samsung_pll36xx_clk_ops = {
- .recalc_rate = samsung_pll36xx_recalc_rate,
-};
-
-struct clk * __init samsung_clk_register_pll36xx(const char *name,
- const char *pname, const void __iomem *con_reg)
+static inline bool samsung_pll36xx_mpk_change(
+ const struct samsung_pll_rate_table *rate, u32 pll_con0, u32 pll_con1)
{
- struct samsung_clk_pll36xx *pll;
- struct clk *clk;
- struct clk_init_data init;
+ u32 old_mdiv, old_pdiv, old_kdiv;
- pll = kzalloc(sizeof(*pll), GFP_KERNEL);
- if (!pll) {
- pr_err("%s: could not allocate pll clk %s\n", __func__, name);
- return NULL;
+ old_mdiv = (pll_con0 >> PLL36XX_MDIV_SHIFT) & PLL36XX_MDIV_MASK;
+ old_pdiv = (pll_con0 >> PLL36XX_PDIV_SHIFT) & PLL36XX_PDIV_MASK;
+ old_kdiv = (pll_con1 >> PLL36XX_KDIV_SHIFT) & PLL36XX_KDIV_MASK;
+
+ return (rate->mdiv != old_mdiv || rate->pdiv != old_pdiv ||
+ rate->kdiv != old_kdiv);
+}
+
+static int samsung_pll36xx_set_rate(struct clk_hw *hw, unsigned long drate,
+ unsigned long parent_rate)
+{
+ struct samsung_clk_pll *pll = to_clk_pll(hw);
+ u32 tmp, pll_con0, pll_con1;
+ const struct samsung_pll_rate_table *rate;
+
+ rate = samsung_get_pll_settings(pll, drate);
+ if (!rate) {
+ pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
+ drate, __clk_get_name(hw->clk));
+ return -EINVAL;
}
- init.name = name;
- init.ops = &samsung_pll36xx_clk_ops;
- init.flags = CLK_GET_RATE_NOCACHE;
- init.parent_names = &pname;
- init.num_parents = 1;
+ pll_con0 = __raw_readl(pll->con_reg);
+ pll_con1 = __raw_readl(pll->con_reg + 4);
- pll->hw.init = &init;
- pll->con_reg = con_reg;
+ if (!(samsung_pll36xx_mpk_change(rate, pll_con0, pll_con1))) {
+ /* If only s change, change just s value only*/
+ pll_con0 &= ~(PLL36XX_SDIV_MASK << PLL36XX_SDIV_SHIFT);
+ pll_con0 |= (rate->sdiv << PLL36XX_SDIV_SHIFT);
+ __raw_writel(pll_con0, pll->con_reg);
- clk = clk_register(NULL, &pll->hw);
- if (IS_ERR(clk)) {
- pr_err("%s: failed to register pll clock %s\n", __func__,
- name);
- kfree(pll);
+ return 0;
}
- if (clk_register_clkdev(clk, name, NULL))
- pr_err("%s: failed to register lookup for %s", __func__, name);
-
- return clk;
+ /* Set PLL lock time. */
+ __raw_writel(rate->pdiv * PLL36XX_LOCK_FACTOR, pll->lock_reg);
+
+ /* Change PLL PMS values */
+ pll_con0 &= ~((PLL36XX_MDIV_MASK << PLL36XX_MDIV_SHIFT) |
+ (PLL36XX_PDIV_MASK << PLL36XX_PDIV_SHIFT) |
+ (PLL36XX_SDIV_MASK << PLL36XX_SDIV_SHIFT));
+ pll_con0 |= (rate->mdiv << PLL36XX_MDIV_SHIFT) |
+ (rate->pdiv << PLL36XX_PDIV_SHIFT) |
+ (rate->sdiv << PLL36XX_SDIV_SHIFT);
+ __raw_writel(pll_con0, pll->con_reg);
+
+ pll_con1 &= ~(PLL36XX_KDIV_MASK << PLL36XX_KDIV_SHIFT);
+ pll_con1 |= rate->kdiv << PLL36XX_KDIV_SHIFT;
+ __raw_writel(pll_con1, pll->con_reg + 4);
+
+ /* wait_lock_time */
+ do {
+ cpu_relax();
+ tmp = __raw_readl(pll->con_reg);
+ } while (!(tmp & (1 << PLL36XX_LOCK_STAT_SHIFT)));
+
+ return 0;
}
+static const struct clk_ops samsung_pll36xx_clk_ops = {
+ .recalc_rate = samsung_pll36xx_recalc_rate,
+ .set_rate = samsung_pll36xx_set_rate,
+ .round_rate = samsung_pll_round_rate,
+};
+
+static const struct clk_ops samsung_pll36xx_clk_min_ops = {
+ .recalc_rate = samsung_pll36xx_recalc_rate,
+};
+
/*
* PLL45xx Clock Type
*/
+#define PLL4502_LOCK_FACTOR 400
+#define PLL4508_LOCK_FACTOR 240
#define PLL45XX_MDIV_MASK (0x3FF)
#define PLL45XX_PDIV_MASK (0x3F)
#define PLL45XX_SDIV_MASK (0x7)
+#define PLL45XX_AFC_MASK (0x1F)
#define PLL45XX_MDIV_SHIFT (16)
#define PLL45XX_PDIV_SHIFT (8)
#define PLL45XX_SDIV_SHIFT (0)
+#define PLL45XX_AFC_SHIFT (0)
-struct samsung_clk_pll45xx {
- struct clk_hw hw;
- enum pll45xx_type type;
- const void __iomem *con_reg;
-};
-
-#define to_clk_pll45xx(_hw) container_of(_hw, struct samsung_clk_pll45xx, hw)
+#define PLL45XX_ENABLE BIT(31)
+#define PLL45XX_LOCKED BIT(29)
static unsigned long samsung_pll45xx_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
- struct samsung_clk_pll45xx *pll = to_clk_pll45xx(hw);
+ struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 mdiv, pdiv, sdiv, pll_con;
u64 fvco = parent_rate;
@@ -208,54 +311,113 @@ static unsigned long samsung_pll45xx_recalc_rate(struct clk_hw *hw,
return (unsigned long)fvco;
}
-static const struct clk_ops samsung_pll45xx_clk_ops = {
- .recalc_rate = samsung_pll45xx_recalc_rate,
-};
-
-struct clk * __init samsung_clk_register_pll45xx(const char *name,
- const char *pname, const void __iomem *con_reg,
- enum pll45xx_type type)
+static bool samsung_pll45xx_mp_change(u32 pll_con0, u32 pll_con1,
+ const struct samsung_pll_rate_table *rate)
{
- struct samsung_clk_pll45xx *pll;
- struct clk *clk;
- struct clk_init_data init;
+ u32 old_mdiv, old_pdiv, old_afc;
- pll = kzalloc(sizeof(*pll), GFP_KERNEL);
- if (!pll) {
- pr_err("%s: could not allocate pll clk %s\n", __func__, name);
- return NULL;
+ old_mdiv = (pll_con0 >> PLL45XX_MDIV_SHIFT) & PLL45XX_MDIV_MASK;
+ old_pdiv = (pll_con0 >> PLL45XX_PDIV_SHIFT) & PLL45XX_PDIV_MASK;
+ old_afc = (pll_con1 >> PLL45XX_AFC_SHIFT) & PLL45XX_AFC_MASK;
+
+ return (old_mdiv != rate->mdiv || old_pdiv != rate->pdiv
+ || old_afc != rate->afc);
+}
+
+static int samsung_pll45xx_set_rate(struct clk_hw *hw, unsigned long drate,
+ unsigned long prate)
+{
+ struct samsung_clk_pll *pll = to_clk_pll(hw);
+ const struct samsung_pll_rate_table *rate;
+ u32 con0, con1;
+ ktime_t start;
+
+ /* Get required rate settings from table */
+ rate = samsung_get_pll_settings(pll, drate);
+ if (!rate) {
+ pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
+ drate, __clk_get_name(hw->clk));
+ return -EINVAL;
}
- init.name = name;
- init.ops = &samsung_pll45xx_clk_ops;
- init.flags = CLK_GET_RATE_NOCACHE;
- init.parent_names = &pname;
- init.num_parents = 1;
+ con0 = __raw_readl(pll->con_reg);
+ con1 = __raw_readl(pll->con_reg + 0x4);
- pll->hw.init = &init;
- pll->con_reg = con_reg;
- pll->type = type;
+ if (!(samsung_pll45xx_mp_change(con0, con1, rate))) {
+ /* If only s change, change just s value only*/
+ con0 &= ~(PLL45XX_SDIV_MASK << PLL45XX_SDIV_SHIFT);
+ con0 |= rate->sdiv << PLL45XX_SDIV_SHIFT;
+ __raw_writel(con0, pll->con_reg);
- clk = clk_register(NULL, &pll->hw);
- if (IS_ERR(clk)) {
- pr_err("%s: failed to register pll clock %s\n", __func__,
- name);
- kfree(pll);
+ return 0;
}
- if (clk_register_clkdev(clk, name, NULL))
- pr_err("%s: failed to register lookup for %s", __func__, name);
+ /* Set PLL PMS values. */
+ con0 &= ~((PLL45XX_MDIV_MASK << PLL45XX_MDIV_SHIFT) |
+ (PLL45XX_PDIV_MASK << PLL45XX_PDIV_SHIFT) |
+ (PLL45XX_SDIV_MASK << PLL45XX_SDIV_SHIFT));
+ con0 |= (rate->mdiv << PLL45XX_MDIV_SHIFT) |
+ (rate->pdiv << PLL45XX_PDIV_SHIFT) |
+ (rate->sdiv << PLL45XX_SDIV_SHIFT);
+
+ /* Set PLL AFC value. */
+ con1 = __raw_readl(pll->con_reg + 0x4);
+ con1 &= ~(PLL45XX_AFC_MASK << PLL45XX_AFC_SHIFT);
+ con1 |= (rate->afc << PLL45XX_AFC_SHIFT);
+
+ /* Set PLL lock time. */
+ switch (pll->type) {
+ case pll_4502:
+ __raw_writel(rate->pdiv * PLL4502_LOCK_FACTOR, pll->lock_reg);
+ break;
+ case pll_4508:
+ __raw_writel(rate->pdiv * PLL4508_LOCK_FACTOR, pll->lock_reg);
+ break;
+ default:
+ break;
+ };
+
+ /* Set new configuration. */
+ __raw_writel(con1, pll->con_reg + 0x4);
+ __raw_writel(con0, pll->con_reg);
+
+ /* Wait for locking. */
+ start = ktime_get();
+ while (!(__raw_readl(pll->con_reg) & PLL45XX_LOCKED)) {
+ ktime_t delta = ktime_sub(ktime_get(), start);
+
+ if (ktime_to_ms(delta) > PLL_TIMEOUT_MS) {
+ pr_err("%s: could not lock PLL %s\n",
+ __func__, __clk_get_name(hw->clk));
+ return -EFAULT;
+ }
+
+ cpu_relax();
+ }
- return clk;
+ return 0;
}
+static const struct clk_ops samsung_pll45xx_clk_ops = {
+ .recalc_rate = samsung_pll45xx_recalc_rate,
+ .round_rate = samsung_pll_round_rate,
+ .set_rate = samsung_pll45xx_set_rate,
+};
+
+static const struct clk_ops samsung_pll45xx_clk_min_ops = {
+ .recalc_rate = samsung_pll45xx_recalc_rate,
+};
+
/*
* PLL46xx Clock Type
*/
+#define PLL46XX_LOCK_FACTOR 3000
+#define PLL46XX_VSEL_MASK (1)
#define PLL46XX_MDIV_MASK (0x1FF)
#define PLL46XX_PDIV_MASK (0x3F)
#define PLL46XX_SDIV_MASK (0x7)
+#define PLL46XX_VSEL_SHIFT (27)
#define PLL46XX_MDIV_SHIFT (16)
#define PLL46XX_PDIV_SHIFT (8)
#define PLL46XX_SDIV_SHIFT (0)
@@ -263,19 +425,20 @@ struct clk * __init samsung_clk_register_pll45xx(const char *name,
#define PLL46XX_KDIV_MASK (0xFFFF)
#define PLL4650C_KDIV_MASK (0xFFF)
#define PLL46XX_KDIV_SHIFT (0)
+#define PLL46XX_MFR_MASK (0x3F)
+#define PLL46XX_MRR_MASK (0x1F)
+#define PLL46XX_KDIV_SHIFT (0)
+#define PLL46XX_MFR_SHIFT (16)
+#define PLL46XX_MRR_SHIFT (24)
-struct samsung_clk_pll46xx {
- struct clk_hw hw;
- enum pll46xx_type type;
- const void __iomem *con_reg;
-};
-
-#define to_clk_pll46xx(_hw) container_of(_hw, struct samsung_clk_pll46xx, hw)
+#define PLL46XX_ENABLE BIT(31)
+#define PLL46XX_LOCKED BIT(29)
+#define PLL46XX_VSEL BIT(27)
static unsigned long samsung_pll46xx_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
- struct samsung_clk_pll46xx *pll = to_clk_pll46xx(hw);
+ struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 mdiv, pdiv, sdiv, kdiv, pll_con0, pll_con1, shift;
u64 fvco = parent_rate;
@@ -295,47 +458,175 @@ static unsigned long samsung_pll46xx_recalc_rate(struct clk_hw *hw,
return (unsigned long)fvco;
}
+static bool samsung_pll46xx_mpk_change(u32 pll_con0, u32 pll_con1,
+ const struct samsung_pll_rate_table *rate)
+{
+ u32 old_mdiv, old_pdiv, old_kdiv;
+
+ old_mdiv = (pll_con0 >> PLL46XX_MDIV_SHIFT) & PLL46XX_MDIV_MASK;
+ old_pdiv = (pll_con0 >> PLL46XX_PDIV_SHIFT) & PLL46XX_PDIV_MASK;
+ old_kdiv = (pll_con1 >> PLL46XX_KDIV_SHIFT) & PLL46XX_KDIV_MASK;
+
+ return (old_mdiv != rate->mdiv || old_pdiv != rate->pdiv
+ || old_kdiv != rate->kdiv);
+}
+
+static int samsung_pll46xx_set_rate(struct clk_hw *hw, unsigned long drate,
+ unsigned long prate)
+{
+ struct samsung_clk_pll *pll = to_clk_pll(hw);
+ const struct samsung_pll_rate_table *rate;
+ u32 con0, con1, lock;
+ ktime_t start;
+
+ /* Get required rate settings from table */
+ rate = samsung_get_pll_settings(pll, drate);
+ if (!rate) {
+ pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
+ drate, __clk_get_name(hw->clk));
+ return -EINVAL;
+ }
+
+ con0 = __raw_readl(pll->con_reg);
+ con1 = __raw_readl(pll->con_reg + 0x4);
+
+ if (!(samsung_pll46xx_mpk_change(con0, con1, rate))) {
+ /* If only s change, change just s value only*/
+ con0 &= ~(PLL46XX_SDIV_MASK << PLL46XX_SDIV_SHIFT);
+ con0 |= rate->sdiv << PLL46XX_SDIV_SHIFT;
+ __raw_writel(con0, pll->con_reg);
+
+ return 0;
+ }
+
+ /* Set PLL lock time. */
+ lock = rate->pdiv * PLL46XX_LOCK_FACTOR;
+ if (lock > 0xffff)
+ /* Maximum lock time bitfield is 16-bit. */
+ lock = 0xffff;
+
+ /* Set PLL PMS and VSEL values. */
+ con0 &= ~((PLL46XX_MDIV_MASK << PLL46XX_MDIV_SHIFT) |
+ (PLL46XX_PDIV_MASK << PLL46XX_PDIV_SHIFT) |
+ (PLL46XX_SDIV_MASK << PLL46XX_SDIV_SHIFT) |
+ (PLL46XX_VSEL_MASK << PLL46XX_VSEL_SHIFT));
+ con0 |= (rate->mdiv << PLL46XX_MDIV_SHIFT) |
+ (rate->pdiv << PLL46XX_PDIV_SHIFT) |
+ (rate->sdiv << PLL46XX_SDIV_SHIFT) |
+ (rate->vsel << PLL46XX_VSEL_SHIFT);
+
+ /* Set PLL K, MFR and MRR values. */
+ con1 = __raw_readl(pll->con_reg + 0x4);
+ con1 &= ~((PLL46XX_KDIV_MASK << PLL46XX_KDIV_SHIFT) |
+ (PLL46XX_MFR_MASK << PLL46XX_MFR_SHIFT) |
+ (PLL46XX_MRR_MASK << PLL46XX_MRR_SHIFT));
+ con1 |= (rate->kdiv << PLL46XX_KDIV_SHIFT) |
+ (rate->mfr << PLL46XX_MFR_SHIFT) |
+ (rate->mrr << PLL46XX_MRR_SHIFT);
+
+ /* Write configuration to PLL */
+ __raw_writel(lock, pll->lock_reg);
+ __raw_writel(con0, pll->con_reg);
+ __raw_writel(con1, pll->con_reg + 0x4);
+
+ /* Wait for locking. */
+ start = ktime_get();
+ while (!(__raw_readl(pll->con_reg) & PLL46XX_LOCKED)) {
+ ktime_t delta = ktime_sub(ktime_get(), start);
+
+ if (ktime_to_ms(delta) > PLL_TIMEOUT_MS) {
+ pr_err("%s: could not lock PLL %s\n",
+ __func__, __clk_get_name(hw->clk));
+ return -EFAULT;
+ }
+
+ cpu_relax();
+ }
+
+ return 0;
+}
+
static const struct clk_ops samsung_pll46xx_clk_ops = {
.recalc_rate = samsung_pll46xx_recalc_rate,
+ .round_rate = samsung_pll_round_rate,
+ .set_rate = samsung_pll46xx_set_rate,
+};
+
+static const struct clk_ops samsung_pll46xx_clk_min_ops = {
+ .recalc_rate = samsung_pll46xx_recalc_rate,
};
-struct clk * __init samsung_clk_register_pll46xx(const char *name,
- const char *pname, const void __iomem *con_reg,
- enum pll46xx_type type)
+/*
+ * PLL6552 Clock Type
+ */
+
+#define PLL6552_MDIV_MASK 0x3ff
+#define PLL6552_PDIV_MASK 0x3f
+#define PLL6552_SDIV_MASK 0x7
+#define PLL6552_MDIV_SHIFT 16
+#define PLL6552_PDIV_SHIFT 8
+#define PLL6552_SDIV_SHIFT 0
+
+static unsigned long samsung_pll6552_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
{
- struct samsung_clk_pll46xx *pll;
- struct clk *clk;
- struct clk_init_data init;
+ struct samsung_clk_pll *pll = to_clk_pll(hw);
+ u32 mdiv, pdiv, sdiv, pll_con;
+ u64 fvco = parent_rate;
- pll = kzalloc(sizeof(*pll), GFP_KERNEL);
- if (!pll) {
- pr_err("%s: could not allocate pll clk %s\n", __func__, name);
- return NULL;
- }
+ pll_con = __raw_readl(pll->con_reg);
+ mdiv = (pll_con >> PLL6552_MDIV_SHIFT) & PLL6552_MDIV_MASK;
+ pdiv = (pll_con >> PLL6552_PDIV_SHIFT) & PLL6552_PDIV_MASK;
+ sdiv = (pll_con >> PLL6552_SDIV_SHIFT) & PLL6552_SDIV_MASK;
- init.name = name;
- init.ops = &samsung_pll46xx_clk_ops;
- init.flags = CLK_GET_RATE_NOCACHE;
- init.parent_names = &pname;
- init.num_parents = 1;
+ fvco *= mdiv;
+ do_div(fvco, (pdiv << sdiv));
- pll->hw.init = &init;
- pll->con_reg = con_reg;
- pll->type = type;
+ return (unsigned long)fvco;
+}
- clk = clk_register(NULL, &pll->hw);
- if (IS_ERR(clk)) {
- pr_err("%s: failed to register pll clock %s\n", __func__,
- name);
- kfree(pll);
- }
+static const struct clk_ops samsung_pll6552_clk_ops = {
+ .recalc_rate = samsung_pll6552_recalc_rate,
+};
- if (clk_register_clkdev(clk, name, NULL))
- pr_err("%s: failed to register lookup for %s", __func__, name);
+/*
+ * PLL6553 Clock Type
+ */
- return clk;
+#define PLL6553_MDIV_MASK 0xff
+#define PLL6553_PDIV_MASK 0x3f
+#define PLL6553_SDIV_MASK 0x7
+#define PLL6553_KDIV_MASK 0xffff
+#define PLL6553_MDIV_SHIFT 16
+#define PLL6553_PDIV_SHIFT 8
+#define PLL6553_SDIV_SHIFT 0
+#define PLL6553_KDIV_SHIFT 0
+
+static unsigned long samsung_pll6553_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct samsung_clk_pll *pll = to_clk_pll(hw);
+ u32 mdiv, pdiv, sdiv, kdiv, pll_con0, pll_con1;
+ u64 fvco = parent_rate;
+
+ pll_con0 = __raw_readl(pll->con_reg);
+ pll_con1 = __raw_readl(pll->con_reg + 0x4);
+ mdiv = (pll_con0 >> PLL6553_MDIV_SHIFT) & PLL6553_MDIV_MASK;
+ pdiv = (pll_con0 >> PLL6553_PDIV_SHIFT) & PLL6553_PDIV_MASK;
+ sdiv = (pll_con0 >> PLL6553_SDIV_SHIFT) & PLL6553_SDIV_MASK;
+ kdiv = (pll_con1 >> PLL6553_KDIV_SHIFT) & PLL6553_KDIV_MASK;
+
+ fvco *= (mdiv << 16) + kdiv;
+ do_div(fvco, (pdiv << sdiv));
+ fvco >>= 16;
+
+ return (unsigned long)fvco;
}
+static const struct clk_ops samsung_pll6553_clk_ops = {
+ .recalc_rate = samsung_pll6553_recalc_rate,
+};
+
/*
* PLL2550x Clock Type
*/
@@ -418,3 +709,117 @@ struct clk * __init samsung_clk_register_pll2550x(const char *name,
return clk;
}
+
+static void __init _samsung_clk_register_pll(struct samsung_pll_clock *pll_clk,
+ void __iomem *base)
+{
+ struct samsung_clk_pll *pll;
+ struct clk *clk;
+ struct clk_init_data init;
+ int ret, len;
+
+ pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+ if (!pll) {
+ pr_err("%s: could not allocate pll clk %s\n",
+ __func__, pll_clk->name);
+ return;
+ }
+
+ init.name = pll_clk->name;
+ init.flags = pll_clk->flags;
+ init.parent_names = &pll_clk->parent_name;
+ init.num_parents = 1;
+
+ if (pll_clk->rate_table) {
+ /* find count of rates in rate_table */
+ for (len = 0; pll_clk->rate_table[len].rate != 0; )
+ len++;
+
+ pll->rate_count = len;
+ pll->rate_table = kmemdup(pll_clk->rate_table,
+ pll->rate_count *
+ sizeof(struct samsung_pll_rate_table),
+ GFP_KERNEL);
+ WARN(!pll->rate_table,
+ "%s: could not allocate rate table for %s\n",
+ __func__, pll_clk->name);
+ }
+
+ switch (pll_clk->type) {
+ /* clk_ops for 35xx and 2550 are similar */
+ case pll_35xx:
+ case pll_2550:
+ if (!pll->rate_table)
+ init.ops = &samsung_pll35xx_clk_min_ops;
+ else
+ init.ops = &samsung_pll35xx_clk_ops;
+ break;
+ case pll_4500:
+ init.ops = &samsung_pll45xx_clk_min_ops;
+ break;
+ case pll_4502:
+ case pll_4508:
+ if (!pll->rate_table)
+ init.ops = &samsung_pll45xx_clk_min_ops;
+ else
+ init.ops = &samsung_pll45xx_clk_ops;
+ break;
+ /* clk_ops for 36xx and 2650 are similar */
+ case pll_36xx:
+ case pll_2650:
+ if (!pll->rate_table)
+ init.ops = &samsung_pll36xx_clk_min_ops;
+ else
+ init.ops = &samsung_pll36xx_clk_ops;
+ break;
+ case pll_6552:
+ init.ops = &samsung_pll6552_clk_ops;
+ break;
+ case pll_6553:
+ init.ops = &samsung_pll6553_clk_ops;
+ break;
+ case pll_4600:
+ case pll_4650:
+ case pll_4650c:
+ if (!pll->rate_table)
+ init.ops = &samsung_pll46xx_clk_min_ops;
+ else
+ init.ops = &samsung_pll46xx_clk_ops;
+ break;
+ default:
+ pr_warn("%s: Unknown pll type for pll clk %s\n",
+ __func__, pll_clk->name);
+ }
+
+ pll->hw.init = &init;
+ pll->type = pll_clk->type;
+ pll->lock_reg = base + pll_clk->lock_offset;
+ pll->con_reg = base + pll_clk->con_offset;
+
+ clk = clk_register(NULL, &pll->hw);
+ if (IS_ERR(clk)) {
+ pr_err("%s: failed to register pll clock %s : %ld\n",
+ __func__, pll_clk->name, PTR_ERR(clk));
+ kfree(pll);
+ return;
+ }
+
+ samsung_clk_add_lookup(clk, pll_clk->id);
+
+ if (!pll_clk->alias)
+ return;
+
+ ret = clk_register_clkdev(clk, pll_clk->alias, pll_clk->dev_name);
+ if (ret)
+ pr_err("%s: failed to register lookup for %s : %d",
+ __func__, pll_clk->name, ret);
+}
+
+void __init samsung_clk_register_pll(struct samsung_pll_clock *pll_list,
+ unsigned int nr_pll, void __iomem *base)
+{
+ int cnt;
+
+ for (cnt = 0; cnt < nr_pll; cnt++)
+ _samsung_clk_register_pll(&pll_list[cnt], base);
+}