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Commit 8334c0e7 authored by Heiko Stübner's avatar Heiko Stübner Committed by Stephen Boyd
Browse files

clk: rockchip: don't use clk_ APIs in the pll init-callback 



Separate the update of pll registers from the actual set_rate function
so that the init callback does not need to access clk-API functions.

As we now have separated the getting and setting of the pll parameters
we can also directly use these new functions in other places too.

Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
parent df70aeef

drivers/clk/rockchip/clk-pll.c

+74 −61
Original line number Diff line number Diff line
@@ -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);

	}

}