diff options
Diffstat (limited to 'drivers/clk/rockchip/clk-pll.c')
| -rw-r--r-- | drivers/clk/rockchip/clk-pll.c | 218 |
1 files changed, 217 insertions, 1 deletions
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 @@ -843,6 +843,213 @@ static const struct clk_ops rockchip_rk3399_pll_clk_ops = { }; /* + * 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); |