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143 lines
3.4 KiB
143 lines
3.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (C) 2016 Maxime Ripard |
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* Maxime Ripard <[email protected]> |
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*/ |
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#include <linux/clk-provider.h> |
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#include <linux/io.h> |
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#include "ccu_gate.h" |
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#include "ccu_div.h" |
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static unsigned long ccu_div_round_rate(struct ccu_mux_internal *mux, |
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struct clk_hw *parent, |
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unsigned long *parent_rate, |
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unsigned long rate, |
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void *data) |
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{ |
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struct ccu_div *cd = data; |
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if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV) |
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rate *= cd->fixed_post_div; |
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rate = divider_round_rate_parent(&cd->common.hw, parent, |
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rate, parent_rate, |
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cd->div.table, cd->div.width, |
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cd->div.flags); |
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if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV) |
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rate /= cd->fixed_post_div; |
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return rate; |
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} |
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static void ccu_div_disable(struct clk_hw *hw) |
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{ |
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struct ccu_div *cd = hw_to_ccu_div(hw); |
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return ccu_gate_helper_disable(&cd->common, cd->enable); |
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} |
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static int ccu_div_enable(struct clk_hw *hw) |
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{ |
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struct ccu_div *cd = hw_to_ccu_div(hw); |
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return ccu_gate_helper_enable(&cd->common, cd->enable); |
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} |
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static int ccu_div_is_enabled(struct clk_hw *hw) |
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{ |
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struct ccu_div *cd = hw_to_ccu_div(hw); |
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return ccu_gate_helper_is_enabled(&cd->common, cd->enable); |
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} |
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static unsigned long ccu_div_recalc_rate(struct clk_hw *hw, |
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unsigned long parent_rate) |
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{ |
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struct ccu_div *cd = hw_to_ccu_div(hw); |
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unsigned long val; |
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u32 reg; |
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reg = readl(cd->common.base + cd->common.reg); |
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val = reg >> cd->div.shift; |
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val &= (1 << cd->div.width) - 1; |
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parent_rate = ccu_mux_helper_apply_prediv(&cd->common, &cd->mux, -1, |
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parent_rate); |
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val = divider_recalc_rate(hw, parent_rate, val, cd->div.table, |
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cd->div.flags, cd->div.width); |
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if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV) |
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val /= cd->fixed_post_div; |
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return val; |
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} |
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static int ccu_div_determine_rate(struct clk_hw *hw, |
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struct clk_rate_request *req) |
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{ |
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struct ccu_div *cd = hw_to_ccu_div(hw); |
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return ccu_mux_helper_determine_rate(&cd->common, &cd->mux, |
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req, ccu_div_round_rate, cd); |
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} |
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static int ccu_div_set_rate(struct clk_hw *hw, unsigned long rate, |
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unsigned long parent_rate) |
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{ |
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struct ccu_div *cd = hw_to_ccu_div(hw); |
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unsigned long flags; |
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unsigned long val; |
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u32 reg; |
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parent_rate = ccu_mux_helper_apply_prediv(&cd->common, &cd->mux, -1, |
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parent_rate); |
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if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV) |
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rate *= cd->fixed_post_div; |
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val = divider_get_val(rate, parent_rate, cd->div.table, cd->div.width, |
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cd->div.flags); |
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spin_lock_irqsave(cd->common.lock, flags); |
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reg = readl(cd->common.base + cd->common.reg); |
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reg &= ~GENMASK(cd->div.width + cd->div.shift - 1, cd->div.shift); |
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writel(reg | (val << cd->div.shift), |
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cd->common.base + cd->common.reg); |
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spin_unlock_irqrestore(cd->common.lock, flags); |
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return 0; |
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} |
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static u8 ccu_div_get_parent(struct clk_hw *hw) |
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{ |
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struct ccu_div *cd = hw_to_ccu_div(hw); |
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return ccu_mux_helper_get_parent(&cd->common, &cd->mux); |
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} |
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static int ccu_div_set_parent(struct clk_hw *hw, u8 index) |
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{ |
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struct ccu_div *cd = hw_to_ccu_div(hw); |
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return ccu_mux_helper_set_parent(&cd->common, &cd->mux, index); |
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} |
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const struct clk_ops ccu_div_ops = { |
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.disable = ccu_div_disable, |
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.enable = ccu_div_enable, |
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.is_enabled = ccu_div_is_enabled, |
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.get_parent = ccu_div_get_parent, |
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.set_parent = ccu_div_set_parent, |
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.determine_rate = ccu_div_determine_rate, |
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.recalc_rate = ccu_div_recalc_rate, |
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.set_rate = ccu_div_set_rate, |
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};
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