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clk: imx: pll14xx: Fix quick switch of S/K parameter

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commit 094234fcf46146339caaac8282aa15d225a5911a upstream.

The PLL14xx on imx8m can change the S and K parameter without requiring
a reset and relock of the whole PLL.

Fix clk_pll144xx_mp_change register reading and use it for pll1443 as
well since no reset+relock is required on K changes either.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Fixes: 8646d4dcc7fb ("clk: imx: Add PLLs driver for imx8mm soc")
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Leonard Crestez 2019-09-04 12:49:18 +03:00 committed by Greg Kroah-Hartman
parent 8fa2c2ca23
commit 1283ae6333
1 changed files with 8 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
drivers/clk/imx/clk-pll14xx.c
View File

@ -112,43 +112,17 @@ static unsigned long clk_pll1443x_recalc_rate(struct clk_hw *hw,
return fvco;
}
static inline bool clk_pll1416x_mp_change(const struct imx_pll14xx_rate_table *rate,
static inline bool clk_pll14xx_mp_change(const struct imx_pll14xx_rate_table *rate,
u32 pll_div)
{
u32 old_mdiv, old_pdiv;
old_mdiv = (pll_div >> MDIV_SHIFT) & MDIV_MASK;
old_pdiv = (pll_div >> PDIV_SHIFT) & PDIV_MASK;
old_mdiv = (pll_div & MDIV_MASK) >> MDIV_SHIFT;
old_pdiv = (pll_div & PDIV_MASK) >> PDIV_SHIFT;
return rate->mdiv != old_mdiv || rate->pdiv != old_pdiv;
}
static inline bool clk_pll1443x_mpk_change(const struct imx_pll14xx_rate_table *rate,
u32 pll_div_ctl0, u32 pll_div_ctl1)
{
u32 old_mdiv, old_pdiv, old_kdiv;
old_mdiv = (pll_div_ctl0 >> MDIV_SHIFT) & MDIV_MASK;
old_pdiv = (pll_div_ctl0 >> PDIV_SHIFT) & PDIV_MASK;
old_kdiv = (pll_div_ctl1 >> KDIV_SHIFT) & KDIV_MASK;
return rate->mdiv != old_mdiv || rate->pdiv != old_pdiv ||
rate->kdiv != old_kdiv;
}
static inline bool clk_pll1443x_mp_change(const struct imx_pll14xx_rate_table *rate,
u32 pll_div_ctl0, u32 pll_div_ctl1)
{
u32 old_mdiv, old_pdiv, old_kdiv;
old_mdiv = (pll_div_ctl0 >> MDIV_SHIFT) & MDIV_MASK;
old_pdiv = (pll_div_ctl0 >> PDIV_SHIFT) & PDIV_MASK;
old_kdiv = (pll_div_ctl1 >> KDIV_SHIFT) & KDIV_MASK;
return rate->mdiv != old_mdiv || rate->pdiv != old_pdiv ||
rate->kdiv != old_kdiv;
}
static int clk_pll14xx_wait_lock(struct clk_pll14xx *pll)
{
u32 val;
@ -174,7 +148,7 @@ static int clk_pll1416x_set_rate(struct clk_hw *hw, unsigned long drate,
tmp = readl_relaxed(pll->base + 4);
if (!clk_pll1416x_mp_change(rate, tmp)) {
if (!clk_pll14xx_mp_change(rate, tmp)) {
tmp &= ~(SDIV_MASK) << SDIV_SHIFT;
tmp |= rate->sdiv << SDIV_SHIFT;
writel_relaxed(tmp, pll->base + 4);
@ -239,13 +213,15 @@ static int clk_pll1443x_set_rate(struct clk_hw *hw, unsigned long drate,
}
tmp = readl_relaxed(pll->base + 4);
div_val = readl_relaxed(pll->base + 8);
if (!clk_pll1443x_mpk_change(rate, tmp, div_val)) {
if (!clk_pll14xx_mp_change(rate, tmp)) {
tmp &= ~(SDIV_MASK) << SDIV_SHIFT;
tmp |= rate->sdiv << SDIV_SHIFT;
writel_relaxed(tmp, pll->base + 4);
tmp = rate->kdiv << KDIV_SHIFT;
writel_relaxed(tmp, pll->base + 8);
return 0;
}