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path: root/drivers/clk/tegra/clk-pll.c
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Diffstat (limited to 'drivers/clk/tegra/clk-pll.c')
-rw-r--r--drivers/clk/tegra/clk-pll.c281
1 files changed, 152 insertions, 129 deletions
diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c
index 17c2cc0..197074a 100644
--- a/drivers/clk/tegra/clk-pll.c
+++ b/drivers/clk/tegra/clk-pll.c
@@ -117,10 +117,6 @@
#define PLLCX_MISC2_DEFAULT 0x30211200
#define PLLCX_MISC3_DEFAULT 0x200
-#define PMC_PLLM_WB0_OVERRIDE 0x1dc
-#define PMC_PLLM_WB0_OVERRIDE_2 0x2b0
-#define PMC_PLLM_WB0_OVERRIDE_2_DIVP_MASK BIT(27)
-
#define PMC_SATA_PWRGT 0x1ac
#define PMC_SATA_PWRGT_PLLE_IDDQ_VALUE BIT(5)
#define PMC_SATA_PWRGT_PLLE_IDDQ_SWCTL BIT(4)
@@ -128,38 +124,31 @@
#define pll_readl(offset, p) readl_relaxed(p->clk_base + offset)
#define pll_readl_base(p) pll_readl(p->params->base_reg, p)
#define pll_readl_misc(p) pll_readl(p->params->misc_reg, p)
+#define pll_override_readl(offset, p) readl_relaxed(p->pmc + offset)
#define pll_writel(val, offset, p) writel_relaxed(val, p->clk_base + offset)
#define pll_writel_base(val, p) pll_writel(val, p->params->base_reg, p)
#define pll_writel_misc(val, p) pll_writel(val, p->params->misc_reg, p)
+#define pll_override_writel(val, offset, p) writel(val, p->pmc + offset)
#define mask(w) ((1 << (w)) - 1)
-#define divm_mask(p) mask(p->divm_width)
-#define divn_mask(p) mask(p->divn_width)
+#define divm_mask(p) mask(p->params->div_nmp->divm_width)
+#define divn_mask(p) mask(p->params->div_nmp->divn_width)
#define divp_mask(p) (p->flags & TEGRA_PLLU ? PLLU_POST_DIVP_MASK : \
- mask(p->divp_width))
+ mask(p->params->div_nmp->divp_width))
#define divm_max(p) (divm_mask(p))
#define divn_max(p) (divn_mask(p))
#define divp_max(p) (1 << (divp_mask(p)))
-
-#ifdef CONFIG_ARCH_TEGRA_114_SOC
-/* PLLXC has 4-bit PDIV, but entry 15 is not allowed in h/w */
-#define PLLXC_PDIV_MAX 14
-
-/* non-monotonic mapping below is not a typo */
-static u8 pllxc_p[PLLXC_PDIV_MAX + 1] = {
- /* PDIV: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 */
- /* p: */ 1, 2, 3, 4, 5, 6, 8, 10, 12, 16, 12, 16, 20, 24, 32
-};
-
-#define PLLCX_PDIV_MAX 7
-static u8 pllcx_p[PLLCX_PDIV_MAX + 1] = {
- /* PDIV: 0, 1, 2, 3, 4, 5, 6, 7 */
- /* p: */ 1, 2, 3, 4, 6, 8, 12, 16
+static struct div_nmp default_nmp = {
+ .divn_shift = PLL_BASE_DIVN_SHIFT,
+ .divn_width = PLL_BASE_DIVN_WIDTH,
+ .divm_shift = PLL_BASE_DIVM_SHIFT,
+ .divm_width = PLL_BASE_DIVM_WIDTH,
+ .divp_shift = PLL_BASE_DIVP_SHIFT,
+ .divp_width = PLL_BASE_DIVP_WIDTH,
};
-#endif
static void clk_pll_enable_lock(struct tegra_clk_pll *pll)
{
@@ -297,6 +286,39 @@ static void clk_pll_disable(struct clk_hw *hw)
spin_unlock_irqrestore(pll->lock, flags);
}
+static int _p_div_to_hw(struct clk_hw *hw, u8 p_div)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ struct pdiv_map *p_tohw = pll->params->pdiv_tohw;
+
+ if (p_tohw) {
+ while (p_tohw->pdiv) {
+ if (p_div <= p_tohw->pdiv)
+ return p_tohw->hw_val;
+ p_tohw++;
+ }
+ return -EINVAL;
+ }
+ return -EINVAL;
+}
+
+static int _hw_to_p_div(struct clk_hw *hw, u8 p_div_hw)
+{
+ struct tegra_clk_pll *pll = to_clk_pll(hw);
+ struct pdiv_map *p_tohw = pll->params->pdiv_tohw;
+
+ if (p_tohw) {
+ while (p_tohw->pdiv) {
+ if (p_div_hw == p_tohw->hw_val)
+ return p_tohw->pdiv;
+ p_tohw++;
+ }
+ return -EINVAL;
+ }
+
+ return 1 << p_div_hw;
+}
+
static int _get_table_rate(struct clk_hw *hw,
struct tegra_clk_pll_freq_table *cfg,
unsigned long rate, unsigned long parent_rate)
@@ -326,9 +348,9 @@ static int _calc_rate(struct clk_hw *hw, struct tegra_clk_pll_freq_table *cfg,
unsigned long rate, unsigned long parent_rate)
{
struct tegra_clk_pll *pll = to_clk_pll(hw);
- struct pdiv_map *p_tohw = pll->params->pdiv_tohw;
unsigned long cfreq;
u32 p_div = 0;
+ int ret;
switch (parent_rate) {
case 12000000:
@@ -369,20 +391,16 @@ static int _calc_rate(struct clk_hw *hw, struct tegra_clk_pll_freq_table *cfg,
|| cfg->output_rate > pll->params->vco_max) {
pr_err("%s: Failed to set %s rate %lu\n",
__func__, __clk_get_name(hw->clk), rate);
+ WARN_ON(1);
return -EINVAL;
}
- if (p_tohw) {
- p_div = 1 << p_div;
- while (p_tohw->pdiv) {
- if (p_div <= p_tohw->pdiv) {
- cfg->p = p_tohw->hw_val;
- break;
- }
- p_tohw++;
- }
- if (!p_tohw->pdiv)
- return -EINVAL;
+ if (pll->params->pdiv_tohw) {
+ ret = _p_div_to_hw(hw, 1 << p_div);
+ if (ret < 0)
+ return ret;
+ else
+ cfg->p = ret;
} else
cfg->p = p_div;
@@ -393,29 +411,61 @@ static void _update_pll_mnp(struct tegra_clk_pll *pll,
struct tegra_clk_pll_freq_table *cfg)
{
u32 val;
+ struct tegra_clk_pll_params *params = pll->params;
+ struct div_nmp *div_nmp = params->div_nmp;
+
+ if ((pll->flags & TEGRA_PLLM) &&
+ (pll_override_readl(PMC_PLLP_WB0_OVERRIDE, pll) &
+ PMC_PLLP_WB0_OVERRIDE_PLLM_OVERRIDE)) {
+ val = pll_override_readl(params->pmc_divp_reg, pll);
+ val &= ~(divp_mask(pll) << div_nmp->override_divp_shift);
+ val |= cfg->p << div_nmp->override_divp_shift;
+ pll_override_writel(val, params->pmc_divp_reg, pll);
+
+ val = pll_override_readl(params->pmc_divnm_reg, pll);
+ val &= ~(divm_mask(pll) << div_nmp->override_divm_shift) |
+ ~(divn_mask(pll) << div_nmp->override_divn_shift);
+ val |= (cfg->m << div_nmp->override_divm_shift) |
+ (cfg->n << div_nmp->override_divn_shift);
+ pll_override_writel(val, params->pmc_divnm_reg, pll);
+ } else {
+ val = pll_readl_base(pll);
- val = pll_readl_base(pll);
+ val &= ~((divm_mask(pll) << div_nmp->divm_shift) |
+ (divn_mask(pll) << div_nmp->divn_shift) |
+ (divp_mask(pll) << div_nmp->divp_shift));
- val &= ~((divm_mask(pll) << pll->divm_shift) |
- (divn_mask(pll) << pll->divn_shift) |
- (divp_mask(pll) << pll->divp_shift));
- val |= ((cfg->m << pll->divm_shift) |
- (cfg->n << pll->divn_shift) |
- (cfg->p << pll->divp_shift));
+ val |= ((cfg->m << div_nmp->divm_shift) |
+ (cfg->n << div_nmp->divn_shift) |
+ (cfg->p << div_nmp->divp_shift));
- pll_writel_base(val, pll);
+ pll_writel_base(val, pll);
+ }
}
static void _get_pll_mnp(struct tegra_clk_pll *pll,
struct tegra_clk_pll_freq_table *cfg)
{
u32 val;
+ struct tegra_clk_pll_params *params = pll->params;
+ struct div_nmp *div_nmp = params->div_nmp;
+
+ if ((pll->flags & TEGRA_PLLM) &&
+ (pll_override_readl(PMC_PLLP_WB0_OVERRIDE, pll) &
+ PMC_PLLP_WB0_OVERRIDE_PLLM_OVERRIDE)) {
+ val = pll_override_readl(params->pmc_divp_reg, pll);
+ cfg->p = (val >> div_nmp->override_divp_shift) & divp_mask(pll);
+
+ val = pll_override_readl(params->pmc_divnm_reg, pll);
+ cfg->m = (val >> div_nmp->override_divm_shift) & divm_mask(pll);
+ cfg->n = (val >> div_nmp->override_divn_shift) & divn_mask(pll);
+ } else {
+ val = pll_readl_base(pll);
- val = pll_readl_base(pll);
-
- cfg->m = (val >> pll->divm_shift) & (divm_mask(pll));
- cfg->n = (val >> pll->divn_shift) & (divn_mask(pll));
- cfg->p = (val >> pll->divp_shift) & (divp_mask(pll));
+ cfg->m = (val >> div_nmp->divm_shift) & divm_mask(pll);
+ cfg->n = (val >> div_nmp->divn_shift) & divn_mask(pll);
+ cfg->p = (val >> div_nmp->divp_shift) & divp_mask(pll);
+ }
}
static void _update_pll_cpcon(struct tegra_clk_pll *pll,
@@ -485,9 +535,10 @@ static int clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
}
if (_get_table_rate(hw, &cfg, rate, parent_rate) &&
- _calc_rate(hw, &cfg, rate, parent_rate))
+ _calc_rate(hw, &cfg, rate, parent_rate)) {
+ WARN_ON(1);
return -EINVAL;
-
+ }
if (pll->lock)
spin_lock_irqsave(pll->lock, flags);
@@ -507,7 +558,6 @@ static long clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
{
struct tegra_clk_pll *pll = to_clk_pll(hw);
struct tegra_clk_pll_freq_table cfg;
- u64 output_rate = *prate;
if (pll->flags & TEGRA_PLL_FIXED)
return pll->fixed_rate;
@@ -517,13 +567,12 @@ static long clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
return __clk_get_rate(hw->clk);
if (_get_table_rate(hw, &cfg, rate, *prate) &&
- _calc_rate(hw, &cfg, rate, *prate))
+ _calc_rate(hw, &cfg, rate, *prate)) {
+ WARN_ON(1);
return -EINVAL;
+ }
- output_rate *= cfg.n;
- do_div(output_rate, cfg.m * (1 << cfg.p));
-
- return output_rate;
+ return cfg.output_rate;
}
static unsigned long clk_pll_recalc_rate(struct clk_hw *hw,
@@ -531,7 +580,6 @@ static unsigned long clk_pll_recalc_rate(struct clk_hw *hw,
{
struct tegra_clk_pll *pll = to_clk_pll(hw);
struct tegra_clk_pll_freq_table cfg;
- struct pdiv_map *p_tohw = pll->params->pdiv_tohw;
u32 val;
u64 rate = parent_rate;
int pdiv;
@@ -553,21 +601,11 @@ static unsigned long clk_pll_recalc_rate(struct clk_hw *hw,
_get_pll_mnp(pll, &cfg);
- if (p_tohw) {
- while (p_tohw->pdiv) {
- if (cfg.p == p_tohw->hw_val) {
- pdiv = p_tohw->pdiv;
- break;
- }
- p_tohw++;
- }
-
- if (!p_tohw->pdiv) {
- WARN_ON(1);
- pdiv = 1;
- }
- } else
- pdiv = 1 << cfg.p;
+ pdiv = _hw_to_p_div(hw, cfg.p);
+ if (pdiv < 0) {
+ WARN_ON(1);
+ pdiv = 1;
+ }
cfg.m *= pdiv;
@@ -647,9 +685,9 @@ static int clk_plle_enable(struct clk_hw *hw)
val = pll_readl_base(pll);
val &= ~(divm_mask(pll) | divn_mask(pll) | divp_mask(pll));
val &= ~(PLLE_BASE_DIVCML_WIDTH << PLLE_BASE_DIVCML_SHIFT);
- val |= sel.m << pll->divm_shift;
- val |= sel.n << pll->divn_shift;
- val |= sel.p << pll->divp_shift;
+ val |= sel.m << pll->params->div_nmp->divm_shift;
+ val |= sel.n << pll->params->div_nmp->divn_shift;
+ val |= sel.p << pll->params->div_nmp->divp_shift;
val |= sel.cpcon << PLLE_BASE_DIVCML_SHIFT;
pll_writel_base(val, pll);
}
@@ -680,9 +718,9 @@ static unsigned long clk_plle_recalc_rate(struct clk_hw *hw,
u32 divn = 0, divm = 0, divp = 0;
u64 rate = parent_rate;
- divp = (val >> pll->divp_shift) & (divp_mask(pll));
- divn = (val >> pll->divn_shift) & (divn_mask(pll));
- divm = (val >> pll->divm_shift) & (divm_mask(pll));
+ divp = (val >> pll->params->div_nmp->divp_shift) & (divp_mask(pll));
+ divn = (val >> pll->params->div_nmp->divn_shift) & (divn_mask(pll));
+ divm = (val >> pll->params->div_nmp->divm_shift) & (divm_mask(pll));
divm *= divp;
rate *= divn;
@@ -769,16 +807,22 @@ static int _calc_dynamic_ramp_rate(struct clk_hw *hw,
{
struct tegra_clk_pll *pll = to_clk_pll(hw);
unsigned int p;
+ int p_div;
if (!rate)
return -EINVAL;
p = DIV_ROUND_UP(pll->params->vco_min, rate);
cfg->m = _pll_fixed_mdiv(pll->params, parent_rate);
- cfg->p = p;
- cfg->output_rate = rate * cfg->p;
+ cfg->output_rate = rate * p;
cfg->n = cfg->output_rate * cfg->m / parent_rate;
+ p_div = _p_div_to_hw(hw, p);
+ if (p_div < 0)
+ return p_div;
+ else
+ cfg->p = p_div;
+
if (cfg->n > divn_max(pll) || cfg->output_rate > pll->params->vco_max)
return -EINVAL;
@@ -790,18 +834,25 @@ static int _pll_ramp_calc_pll(struct clk_hw *hw,
unsigned long rate, unsigned long parent_rate)
{
struct tegra_clk_pll *pll = to_clk_pll(hw);
- int err = 0;
+ int err = 0, p_div;
err = _get_table_rate(hw, cfg, rate, parent_rate);
if (err < 0)
err = _calc_dynamic_ramp_rate(hw, cfg, rate, parent_rate);
- else if (cfg->m != _pll_fixed_mdiv(pll->params, parent_rate)) {
+ else {
+ if (cfg->m != _pll_fixed_mdiv(pll->params, parent_rate)) {
WARN_ON(1);
err = -EINVAL;
goto out;
+ }
+ p_div = _p_div_to_hw(hw, cfg->p);
+ if (p_div < 0)
+ return p_div;
+ else
+ cfg->p = p_div;
}
- if (!cfg->p || (cfg->p > pll->params->max_p))
+ if (cfg->p > pll->params->max_p)
err = -EINVAL;
out:
@@ -815,7 +866,6 @@ static int clk_pllxc_set_rate(struct clk_hw *hw, unsigned long rate,
struct tegra_clk_pll_freq_table cfg, old_cfg;
unsigned long flags = 0;
int ret = 0;
- u8 old_p;
ret = _pll_ramp_calc_pll(hw, &cfg, rate, parent_rate);
if (ret < 0)
@@ -826,11 +876,8 @@ static int clk_pllxc_set_rate(struct clk_hw *hw, unsigned long rate,
_get_pll_mnp(pll, &old_cfg);
- old_p = pllxc_p[old_cfg.p];
- if (old_cfg.m != cfg.m || old_cfg.n != cfg.n || old_p != cfg.p) {
- cfg.p -= 1;
+ if (old_cfg.m != cfg.m || old_cfg.n != cfg.n || old_cfg.p != cfg.p)
ret = _program_pll(hw, &cfg, rate);
- }
if (pll->lock)
spin_unlock_irqrestore(pll->lock, flags);
@@ -842,15 +889,19 @@ static long clk_pll_ramp_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
struct tegra_clk_pll_freq_table cfg;
- int ret = 0;
+ int ret = 0, p_div;
u64 output_rate = *prate;
ret = _pll_ramp_calc_pll(hw, &cfg, rate, *prate);
if (ret < 0)
return ret;
+ p_div = _hw_to_p_div(hw, cfg.p);
+ if (p_div < 0)
+ return p_div;
+
output_rate *= cfg.n;
- do_div(output_rate, cfg.m * cfg.p);
+ do_div(output_rate, cfg.m * p_div);
return output_rate;
}
@@ -862,7 +913,6 @@ static int clk_pllm_set_rate(struct clk_hw *hw, unsigned long rate,
struct tegra_clk_pll *pll = to_clk_pll(hw);
unsigned long flags = 0;
int state, ret = 0;
- u32 val;
if (pll->lock)
spin_lock_irqsave(pll->lock, flags);
@@ -881,22 +931,7 @@ static int clk_pllm_set_rate(struct clk_hw *hw, unsigned long rate,
if (ret < 0)
goto out;
- cfg.p -= 1;
-
- val = readl_relaxed(pll->pmc + PMC_PLLM_WB0_OVERRIDE);
- if (val & PMC_PLLP_WB0_OVERRIDE_PLLM_OVERRIDE) {
- val = readl_relaxed(pll->pmc + PMC_PLLM_WB0_OVERRIDE_2);
- val = cfg.p ? (val | PMC_PLLM_WB0_OVERRIDE_2_DIVP_MASK) :
- (val & ~PMC_PLLM_WB0_OVERRIDE_2_DIVP_MASK);
- writel_relaxed(val, pll->pmc + PMC_PLLM_WB0_OVERRIDE_2);
-
- val = readl_relaxed(pll->pmc + PMC_PLLM_WB0_OVERRIDE);
- val &= ~(divn_mask(pll) | divm_mask(pll));
- val |= (cfg.m << pll->divm_shift) | (cfg.n << pll->divn_shift);
- writel_relaxed(val, pll->pmc + PMC_PLLM_WB0_OVERRIDE);
- } else
- _update_pll_mnp(pll, &cfg);
-
+ _update_pll_mnp(pll, &cfg);
out:
if (pll->lock)
@@ -1010,13 +1045,10 @@ static int _pllcx_update_dynamic_coef(struct tegra_clk_pll *pll,
static int clk_pllc_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
- struct tegra_clk_pll_freq_table cfg;
+ struct tegra_clk_pll_freq_table cfg, old_cfg;
struct tegra_clk_pll *pll = to_clk_pll(hw);
unsigned long flags = 0;
int state, ret = 0;
- u32 val;
- u16 old_m, old_n;
- u8 old_p;
if (pll->lock)
spin_lock_irqsave(pll->lock, flags);
@@ -1025,21 +1057,16 @@ static int clk_pllc_set_rate(struct clk_hw *hw, unsigned long rate,
if (ret < 0)
goto out;
- val = pll_readl_base(pll);
- old_m = (val >> pll->divm_shift) & (divm_mask(pll));
- old_n = (val >> pll->divn_shift) & (divn_mask(pll));
- old_p = pllcx_p[(val >> pll->divp_shift) & (divp_mask(pll))];
+ _get_pll_mnp(pll, &old_cfg);
- if (cfg.m != old_m) {
+ if (cfg.m != old_cfg.m) {
WARN_ON(1);
goto out;
}
- if (old_n == cfg.n && old_p == cfg.p)
+ if (old_cfg.n == cfg.n && old_cfg.p == cfg.p)
goto out;
- cfg.p -= 1;
-
state = clk_pll_is_enabled(hw);
if (state)
_clk_pllc_disable(hw);
@@ -1178,8 +1205,8 @@ static int clk_plle_tegra114_enable(struct clk_hw *hw)
val = pll_readl_base(pll);
val &= ~(divm_mask(pll) | divn_mask(pll) | divp_mask(pll));
val &= ~(PLLE_BASE_DIVCML_WIDTH << PLLE_BASE_DIVCML_SHIFT);
- val |= sel.m << pll->divm_shift;
- val |= sel.n << pll->divn_shift;
+ val |= sel.m << pll->params->div_nmp->divm_shift;
+ val |= sel.n << pll->params->div_nmp->divn_shift;
val |= sel.cpcon << PLLE_BASE_DIVCML_SHIFT;
pll_writel_base(val, pll);
udelay(1);
@@ -1240,12 +1267,8 @@ static struct tegra_clk_pll *_tegra_init_pll(void __iomem *clk_base,
pll->flags = pll_flags;
pll->lock = lock;
- pll->divp_shift = PLL_BASE_DIVP_SHIFT;
- pll->divp_width = PLL_BASE_DIVP_WIDTH;
- pll->divn_shift = PLL_BASE_DIVN_SHIFT;
- pll->divn_width = PLL_BASE_DIVN_WIDTH;
- pll->divm_shift = PLL_BASE_DIVM_SHIFT;
- pll->divm_width = PLL_BASE_DIVM_WIDTH;
+ if (!pll_params->div_nmp)
+ pll_params->div_nmp = &default_nmp;
return pll;
}
@@ -1401,7 +1424,7 @@ struct clk *tegra_clk_register_pllre(const char *name, const char *parent_name,
struct tegra_clk_pll *pll;
struct clk *clk;
- pll_flags |= TEGRA_PLL_HAS_LOCK_ENABLE;
+ pll_flags |= TEGRA_PLL_HAS_LOCK_ENABLE | TEGRA_PLL_LOCK_MISC;
pll = _tegra_init_pll(clk_base, pmc, fixed_rate, pll_params, pll_flags,
freq_table, lock);
if (IS_ERR(pll))
@@ -1428,7 +1451,6 @@ struct clk *tegra_clk_register_pllre(const char *name, const char *parent_name,
val &= ~BIT(29);
pll_writel_misc(val, pll);
- pll_flags |= TEGRA_PLL_LOCK_MISC;
clk = _tegra_clk_register_pll(pll, name, parent_name, flags,
&tegra_clk_pllre_ops);
if (IS_ERR(clk))
@@ -1453,6 +1475,7 @@ struct clk *tegra_clk_register_pllm(const char *name, const char *parent_name,
pll_flags |= TEGRA_PLL_BYPASS;
pll_flags |= TEGRA_PLL_HAS_LOCK_ENABLE;
+ pll_flags |= TEGRA_PLLM;
pll = _tegra_init_pll(clk_base, pmc, fixed_rate, pll_params, pll_flags,
freq_table, lock);
if (IS_ERR(pll))
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