[PATCHv2 5/9] clk: rockchip: add pll type for RK3588
Sebastian Reichel
sebastian.reichel at collabora.com
Fri Sep 30 08:38:53 PDT 2022
From: Elaine Zhang <zhangqing at rock-chips.com>
Add RK3588 PLL support fully relying on lookup tables like
the other upstream supported rockchip platforms.
Signed-off-by: Elaine Zhang <zhangqing at rock-chips.com>
[rebase and modify code to avoid PLL parameter calculation]
Signed-off-by: Sebastian Reichel <sebastian.reichel at collabora.com>
---
drivers/clk/rockchip/clk-pll.c | 218 ++++++++++++++++++++++++++++++++-
drivers/clk/rockchip/clk.h | 18 +++
2 files changed, 235 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c
index f7827b3b7fc1..4b9840994295 100644
--- a/drivers/clk/rockchip/clk-pll.c
+++ b/drivers/clk/rockchip/clk-pll.c
@@ -842,6 +842,213 @@ static const struct clk_ops rockchip_rk3399_pll_clk_ops = {
.init = rockchip_rk3399_pll_init,
};
+/*
+ * PLL used in RK3588
+ */
+
+#define RK3588_PLLCON(i) (i * 0x4)
+#define RK3588_PLLCON0_M_MASK 0x3ff
+#define RK3588_PLLCON0_M_SHIFT 0
+#define RK3588_PLLCON1_P_MASK 0x3f
+#define RK3588_PLLCON1_P_SHIFT 0
+#define RK3588_PLLCON1_S_MASK 0x7
+#define RK3588_PLLCON1_S_SHIFT 6
+#define RK3588_PLLCON2_K_MASK 0xffff
+#define RK3588_PLLCON2_K_SHIFT 0
+#define RK3588_PLLCON1_PWRDOWN BIT(13)
+#define RK3588_PLLCON6_LOCK_STATUS BIT(15)
+
+static int rockchip_rk3588_pll_wait_lock(struct rockchip_clk_pll *pll)
+{
+ u32 pllcon;
+ int ret;
+
+ /*
+ * Lock time typical 250, max 500 input clock cycles @24MHz
+ * So define a very safe maximum of 1000us, meaning 24000 cycles.
+ */
+ ret = readl_relaxed_poll_timeout(pll->reg_base + RK3588_PLLCON(6),
+ pllcon,
+ pllcon & RK3588_PLLCON6_LOCK_STATUS,
+ 0, 1000);
+ if (ret)
+ pr_err("%s: timeout waiting for pll to lock\n", __func__);
+
+ return ret;
+}
+
+static void rockchip_rk3588_pll_get_params(struct rockchip_clk_pll *pll,
+ struct rockchip_pll_rate_table *rate)
+{
+ u32 pllcon;
+
+ pllcon = readl_relaxed(pll->reg_base + RK3588_PLLCON(0));
+ rate->m = ((pllcon >> RK3588_PLLCON0_M_SHIFT) & RK3588_PLLCON0_M_MASK);
+
+ pllcon = readl_relaxed(pll->reg_base + RK3588_PLLCON(1));
+ rate->p = ((pllcon >> RK3588_PLLCON1_P_SHIFT) & RK3588_PLLCON1_P_MASK);
+ rate->s = ((pllcon >> RK3588_PLLCON1_S_SHIFT) & RK3588_PLLCON1_S_MASK);
+
+ pllcon = readl_relaxed(pll->reg_base + RK3588_PLLCON(2));
+ rate->k = ((pllcon >> RK3588_PLLCON2_K_SHIFT) & RK3588_PLLCON2_K_MASK);
+}
+
+static unsigned long rockchip_rk3588_pll_recalc_rate(struct clk_hw *hw, unsigned long prate)
+{
+ struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
+ struct rockchip_pll_rate_table cur;
+ u64 rate64 = prate, postdiv;
+
+ rockchip_rk3588_pll_get_params(pll, &cur);
+
+ rate64 *= cur.m;
+ do_div(rate64, cur.p);
+
+ if (cur.k) {
+ /* fractional mode */
+ u64 frac_rate64 = prate * cur.k;
+
+ postdiv = cur.p * 65535;
+ do_div(frac_rate64, postdiv);
+ rate64 += frac_rate64;
+ }
+ rate64 = rate64 >> cur.s;
+
+ return (unsigned long)rate64;
+}
+
+static int rockchip_rk3588_pll_set_params(struct rockchip_clk_pll *pll,
+ const struct rockchip_pll_rate_table *rate)
+{
+ 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;
+
+ pr_debug("%s: rate settings for %lu p: %d, m: %d, s: %d, k: %d\n",
+ __func__, rate->rate, rate->p, rate->m, rate->s, rate->k);
+
+ rockchip_rk3588_pll_get_params(pll, &cur);
+ cur.rate = 0;
+
+ if (pll->type == pll_rk3588) {
+ 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);
+ rate_change_remuxed = 1;
+ }
+ }
+
+ /* set pll power down */
+ writel(HIWORD_UPDATE(RK3588_PLLCON1_PWRDOWN,
+ RK3588_PLLCON1_PWRDOWN, 0),
+ pll->reg_base + RK3399_PLLCON(1));
+
+ /* update pll values */
+ writel_relaxed(HIWORD_UPDATE(rate->m, RK3588_PLLCON0_M_MASK, RK3588_PLLCON0_M_SHIFT),
+ pll->reg_base + RK3399_PLLCON(0));
+
+ writel_relaxed(HIWORD_UPDATE(rate->p, RK3588_PLLCON1_P_MASK, RK3588_PLLCON1_P_SHIFT) |
+ HIWORD_UPDATE(rate->s, RK3588_PLLCON1_S_MASK, RK3588_PLLCON1_S_SHIFT),
+ pll->reg_base + RK3399_PLLCON(1));
+
+ writel_relaxed(HIWORD_UPDATE(rate->k, RK3588_PLLCON2_K_MASK, RK3588_PLLCON2_K_SHIFT),
+ pll->reg_base + RK3399_PLLCON(2));
+
+ /* set pll power up */
+ writel(HIWORD_UPDATE(0, RK3588_PLLCON1_PWRDOWN, 0),
+ pll->reg_base + RK3588_PLLCON(1));
+
+ /* wait for the pll to lock */
+ ret = rockchip_rk3588_pll_wait_lock(pll);
+ if (ret) {
+ pr_warn("%s: pll update unsuccessful, trying to restore old params\n",
+ __func__);
+ rockchip_rk3588_pll_set_params(pll, &cur);
+ }
+
+ if ((pll->type == pll_rk3588) && rate_change_remuxed)
+ pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_NORM);
+
+ return ret;
+}
+
+static int rockchip_rk3588_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;
+
+ pr_debug("%s: changing %s to %lu with a parent rate of %lu\n",
+ __func__, __clk_get_name(hw->clk), 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_get_name(hw->clk));
+ return -EINVAL;
+ }
+
+ return rockchip_rk3588_pll_set_params(pll, rate);
+}
+
+static int rockchip_rk3588_pll_enable(struct clk_hw *hw)
+{
+ struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
+
+ writel(HIWORD_UPDATE(0, RK3588_PLLCON1_PWRDOWN, 0),
+ pll->reg_base + RK3588_PLLCON(1));
+ rockchip_rk3588_pll_wait_lock(pll);
+
+ return 0;
+}
+
+static void rockchip_rk3588_pll_disable(struct clk_hw *hw)
+{
+ struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
+
+ writel(HIWORD_UPDATE(RK3588_PLLCON1_PWRDOWN, RK3588_PLLCON1_PWRDOWN, 0),
+ pll->reg_base + RK3588_PLLCON(1));
+}
+
+static int rockchip_rk3588_pll_is_enabled(struct clk_hw *hw)
+{
+ struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
+ u32 pllcon = readl(pll->reg_base + RK3588_PLLCON(1));
+
+ return !(pllcon & RK3588_PLLCON1_PWRDOWN);
+}
+
+static int rockchip_rk3588_pll_init(struct clk_hw *hw)
+{
+ struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
+
+ if (!(pll->flags & ROCKCHIP_PLL_SYNC_RATE))
+ return 0;
+
+ return 0;
+}
+
+static const struct clk_ops rockchip_rk3588_pll_clk_norate_ops = {
+ .recalc_rate = rockchip_rk3588_pll_recalc_rate,
+ .enable = rockchip_rk3588_pll_enable,
+ .disable = rockchip_rk3588_pll_disable,
+ .is_enabled = rockchip_rk3588_pll_is_enabled,
+};
+
+static const struct clk_ops rockchip_rk3588_pll_clk_ops = {
+ .recalc_rate = rockchip_rk3588_pll_recalc_rate,
+ .round_rate = rockchip_pll_round_rate,
+ .set_rate = rockchip_rk3588_pll_set_rate,
+ .enable = rockchip_rk3588_pll_enable,
+ .disable = rockchip_rk3588_pll_disable,
+ .is_enabled = rockchip_rk3588_pll_is_enabled,
+ .init = rockchip_rk3588_pll_init,
+};
+
/*
* Common registering of pll clocks
*/
@@ -890,7 +1097,8 @@ struct clk *rockchip_clk_register_pll(struct rockchip_clk_provider *ctx,
if (pll_type == pll_rk3036 ||
pll_type == pll_rk3066 ||
pll_type == pll_rk3328 ||
- pll_type == pll_rk3399)
+ pll_type == pll_rk3399 ||
+ pll_type == pll_rk3588)
pll_mux->flags |= CLK_MUX_HIWORD_MASK;
/* the actual muxing is xin24m, pll-output, xin32k */
@@ -957,6 +1165,14 @@ struct clk *rockchip_clk_register_pll(struct rockchip_clk_provider *ctx,
else
init.ops = &rockchip_rk3399_pll_clk_ops;
break;
+ case pll_rk3588:
+ case pll_rk3588_core:
+ if (!pll->rate_table)
+ init.ops = &rockchip_rk3588_pll_clk_norate_ops;
+ else
+ init.ops = &rockchip_rk3588_pll_clk_ops;
+ init.flags = flags;
+ break;
default:
pr_warn("%s: Unknown pll type for pll clk %s\n",
__func__, name);
diff --git a/drivers/clk/rockchip/clk.h b/drivers/clk/rockchip/clk.h
index 6aece7f07a7d..bf7c8d082fde 100644
--- a/drivers/clk/rockchip/clk.h
+++ b/drivers/clk/rockchip/clk.h
@@ -221,6 +221,8 @@ enum rockchip_pll_type {
pll_rk3066,
pll_rk3328,
pll_rk3399,
+ pll_rk3588,
+ pll_rk3588_core,
};
#define RK3036_PLL_RATE(_rate, _refdiv, _fbdiv, _postdiv1, \
@@ -253,6 +255,15 @@ enum rockchip_pll_type {
.nb = _nb, \
}
+#define RK3588_PLL_RATE(_rate, _p, _m, _s, _k) \
+{ \
+ .rate = _rate##U, \
+ .p = _p, \
+ .m = _m, \
+ .s = _s, \
+ .k = _k, \
+}
+
/**
* struct rockchip_clk_provider - information about clock provider
* @reg_base: virtual address for the register base.
@@ -288,6 +299,13 @@ struct rockchip_pll_rate_table {
unsigned int dsmpd;
unsigned int frac;
};
+ struct {
+ /* for RK3588 */
+ unsigned int m;
+ unsigned int p;
+ unsigned int s;
+ unsigned int k;
+ };
};
};
--
2.35.1
More information about the Linux-rockchip
mailing list