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path: root/drivers/clk/rockchip/clk-pll.c
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Diffstat (limited to 'drivers/clk/rockchip/clk-pll.c')
-rw-r--r--drivers/clk/rockchip/clk-pll.c135
1 files changed, 74 insertions, 61 deletions
diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c
index 7737a1df1e4b..4881eb8a1576 100644
--- a/drivers/clk/rockchip/clk-pll.c
+++ b/drivers/clk/rockchip/clk-pll.c
@@ -126,11 +126,32 @@ static int rockchip_pll_wait_lock(struct rockchip_clk_pll *pll)
#define RK3066_PLLCON3_PWRDOWN (1 << 1)
#define RK3066_PLLCON3_BYPASS (1 << 0)
+static void rockchip_rk3066_pll_get_params(struct rockchip_clk_pll *pll,
+ struct rockchip_pll_rate_table *rate)
+{
+ u32 pllcon;
+
+ pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(0));
+ rate->nr = ((pllcon >> RK3066_PLLCON0_NR_SHIFT)
+ & RK3066_PLLCON0_NR_MASK) + 1;
+ rate->no = ((pllcon >> RK3066_PLLCON0_OD_SHIFT)
+ & RK3066_PLLCON0_OD_MASK) + 1;
+
+ pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(1));
+ rate->nf = ((pllcon >> RK3066_PLLCON1_NF_SHIFT)
+ & RK3066_PLLCON1_NF_MASK) + 1;
+
+ pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(2));
+ rate->nb = ((pllcon >> RK3066_PLLCON2_NB_SHIFT)
+ & RK3066_PLLCON2_NB_MASK) + 1;
+}
+
static unsigned long rockchip_rk3066_pll_recalc_rate(struct clk_hw *hw,
unsigned long prate)
{
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
- u64 nf, nr, no, rate64 = prate;
+ struct rockchip_pll_rate_table cur;
+ u64 rate64 = prate;
u32 pllcon;
pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(3));
@@ -140,53 +161,31 @@ static unsigned long rockchip_rk3066_pll_recalc_rate(struct clk_hw *hw,
return prate;
}
- pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(1));
- nf = (pllcon >> RK3066_PLLCON1_NF_SHIFT) & RK3066_PLLCON1_NF_MASK;
-
- pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(0));
- nr = (pllcon >> RK3066_PLLCON0_NR_SHIFT) & RK3066_PLLCON0_NR_MASK;
- no = (pllcon >> RK3066_PLLCON0_OD_SHIFT) & RK3066_PLLCON0_OD_MASK;
+ rockchip_rk3066_pll_get_params(pll, &cur);
- rate64 *= (nf + 1);
- do_div(rate64, nr + 1);
- do_div(rate64, no + 1);
+ rate64 *= cur.nf;
+ do_div(rate64, cur.nr);
+ do_div(rate64, cur.no);
return (unsigned long)rate64;
}
-static int rockchip_rk3066_pll_set_rate(struct clk_hw *hw, unsigned long drate,
- unsigned long prate)
+static int rockchip_rk3066_pll_set_params(struct rockchip_clk_pll *pll,
+ const struct rockchip_pll_rate_table *rate)
{
- struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
- const struct rockchip_pll_rate_table *rate;
- unsigned long old_rate = rockchip_rk3066_pll_recalc_rate(hw, prate);
- struct regmap *grf = rockchip_clk_get_grf();
- struct clk_mux *pll_mux = &pll->pll_mux;
const struct clk_ops *pll_mux_ops = pll->pll_mux_ops;
+ struct clk_mux *pll_mux = &pll->pll_mux;
+ struct rockchip_pll_rate_table cur;
int rate_change_remuxed = 0;
int cur_parent;
int ret;
- if (IS_ERR(grf)) {
- pr_debug("%s: grf regmap not available, aborting rate change\n",
- __func__);
- return PTR_ERR(grf);
- }
-
- pr_debug("%s: changing %s from %lu to %lu with a parent rate of %lu\n",
- __func__, clk_hw_get_name(hw), old_rate, drate, prate);
-
- /* Get required rate settings from table */
- rate = rockchip_get_pll_settings(pll, drate);
- if (!rate) {
- pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
- drate, clk_hw_get_name(hw));
- return -EINVAL;
- }
-
pr_debug("%s: rate settings for %lu (nr, no, nf): (%d, %d, %d)\n",
__func__, rate->rate, rate->nr, rate->no, rate->nf);
+ rockchip_rk3066_pll_get_params(pll, &cur);
+ cur.rate = 0;
+
cur_parent = pll_mux_ops->get_parent(&pll_mux->hw);
if (cur_parent == PLL_MODE_NORM) {
pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_SLOW);
@@ -219,9 +218,9 @@ static int rockchip_rk3066_pll_set_rate(struct clk_hw *hw, unsigned long drate,
/* wait for the pll to lock */
ret = rockchip_pll_wait_lock(pll);
if (ret) {
- pr_warn("%s: pll did not lock, trying to restore old rate %lu\n",
- __func__, old_rate);
- rockchip_rk3066_pll_set_rate(hw, old_rate, prate);
+ pr_warn("%s: pll update unsucessful, trying to restore old params\n",
+ __func__);
+ rockchip_rk3066_pll_set_params(pll, &cur);
}
if (rate_change_remuxed)
@@ -230,6 +229,34 @@ static int rockchip_rk3066_pll_set_rate(struct clk_hw *hw, unsigned long drate,
return ret;
}
+static int rockchip_rk3066_pll_set_rate(struct clk_hw *hw, unsigned long drate,
+ unsigned long prate)
+{
+ struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
+ const struct rockchip_pll_rate_table *rate;
+ unsigned long old_rate = rockchip_rk3066_pll_recalc_rate(hw, prate);
+ struct regmap *grf = rockchip_clk_get_grf();
+
+ if (IS_ERR(grf)) {
+ pr_debug("%s: grf regmap not available, aborting rate change\n",
+ __func__);
+ return PTR_ERR(grf);
+ }
+
+ pr_debug("%s: changing %s from %lu to %lu with a parent rate of %lu\n",
+ __func__, clk_hw_get_name(hw), old_rate, drate, prate);
+
+ /* Get required rate settings from table */
+ rate = rockchip_get_pll_settings(pll, drate);
+ if (!rate) {
+ pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
+ drate, clk_hw_get_name(hw));
+ return -EINVAL;
+ }
+
+ return rockchip_rk3066_pll_set_params(pll, rate);
+}
+
static int rockchip_rk3066_pll_enable(struct clk_hw *hw)
{
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
@@ -261,9 +288,8 @@ static void rockchip_rk3066_pll_init(struct clk_hw *hw)
{
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
const struct rockchip_pll_rate_table *rate;
- unsigned int nf, nr, no, nb;
+ struct rockchip_pll_rate_table cur;
unsigned long drate;
- u32 pllcon;
if (!(pll->flags & ROCKCHIP_PLL_SYNC_RATE))
return;
@@ -275,34 +301,21 @@ static void rockchip_rk3066_pll_init(struct clk_hw *hw)
if (!rate)
return;
- pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(0));
- nr = ((pllcon >> RK3066_PLLCON0_NR_SHIFT) & RK3066_PLLCON0_NR_MASK) + 1;
- no = ((pllcon >> RK3066_PLLCON0_OD_SHIFT) & RK3066_PLLCON0_OD_MASK) + 1;
-
- pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(1));
- nf = ((pllcon >> RK3066_PLLCON1_NF_SHIFT) & RK3066_PLLCON1_NF_MASK) + 1;
-
- pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(2));
- nb = ((pllcon >> RK3066_PLLCON2_NB_SHIFT) & RK3066_PLLCON2_NB_MASK) + 1;
+ rockchip_rk3066_pll_get_params(pll, &cur);
pr_debug("%s: pll %s@%lu: nr (%d:%d); no (%d:%d); nf(%d:%d), nb(%d:%d)\n",
- __func__, clk_hw_get_name(hw), drate, rate->nr, nr,
- rate->no, no, rate->nf, nf, rate->nb, nb);
- if (rate->nr != nr || rate->no != no || rate->nf != nf
- || rate->nb != nb) {
- struct clk_hw *parent = clk_hw_get_parent(hw);
- unsigned long prate;
-
- if (!parent) {
- pr_warn("%s: parent of %s not available\n",
- __func__, clk_hw_get_name(hw));
+ __func__, clk_hw_get_name(hw), drate, rate->nr, cur.nr,
+ rate->no, cur.no, rate->nf, cur.nf, rate->nb, cur.nb);
+ if (rate->nr != cur.nr || rate->no != cur.no || rate->nf != cur.nf
+ || rate->nb != cur.nb) {
+ struct regmap *grf = rockchip_clk_get_grf();
+
+ if (IS_ERR(grf))
return;
- }
pr_debug("%s: pll %s: rate params do not match rate table, adjusting\n",
__func__, clk_hw_get_name(hw));
- prate = clk_hw_get_rate(parent);
- rockchip_rk3066_pll_set_rate(hw, drate, prate);
+ rockchip_rk3066_pll_set_params(pll, rate);
}
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.