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clk: tegra: Use override bits when needed 

PLLM has override bits in the PMC. Use those when PLLM_OVERRIDE_ENABLE
is set.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Peter De Schrijver 2013-06-06 13:47:31 +03:00 committed by Mike Turquette
parent c09e32bb67
commit 408a24f822
1 changed files with 48 additions and 32 deletions
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72
drivers/clk/tegra/clk-pll.c
View File

@ -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)
@ -128,10 +124,12 @@
#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->params->div_nmp->divm_width)
@ -413,29 +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 &= ~((divm_mask(pll) << pll->params->div_nmp->divm_shift) |
(divn_mask(pll) << pll->params->div_nmp->divn_shift) |
(divp_mask(pll) << pll->params->div_nmp->divp_shift));
val |= ((cfg->m << pll->params->div_nmp->divm_shift) |
(cfg->n << pll->params->div_nmp->divn_shift) |
(cfg->p << pll->params->div_nmp->divp_shift));
val &= ~((divm_mask(pll) << div_nmp->divm_shift) |
(divn_mask(pll) << div_nmp->divn_shift) |
(divp_mask(pll) << div_nmp->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);
}
}
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);
cfg->m = (val >> pll->params->div_nmp->divm_shift) & (divm_mask(pll));
cfg->n = (val >> pll->params->div_nmp->divn_shift) & (divn_mask(pll));
cfg->p = (val >> pll->params->div_nmp->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,
@ -883,7 +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);
@ -902,22 +931,8 @@ static int clk_pllm_set_rate(struct clk_hw *hw, unsigned long rate,
if (ret < 0)
goto out;
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->params->div_nmp->divm_shift) |
(cfg.n << pll->params->div_nmp->divn_shift);
writel_relaxed(val, pll->pmc + PMC_PLLM_WB0_OVERRIDE);
} else
_update_pll_mnp(pll, &cfg);
out:
if (pll->lock)
spin_unlock_irqrestore(pll->lock, flags);
@ -1460,6 +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))