b914ec33b3
The Allwinner SoC's typically have an upper and lower limit for their clocks' rates. Up until now, support for that has been implemented separately for each clock type. Implement that functionality in the sunxi-ng's common part making use of the CCF rate liming capabilities, so that it is available for all clock types. Suggested-by: Maxime Ripard <mripard@kernel.org> Signed-off-by: Frank Oltmanns <frank@oltmanns.dev> Cc: stable@vger.kernel.org Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com> Acked-by: Maxime Ripard <mripard@kernel.org> Link: https://lore.kernel.org/r/20240310-pinephone-pll-fixes-v4-1-46fc80c83637@oltmanns.dev Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2016 Maxime Ripard. All rights reserved.
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*/
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#ifndef _COMMON_H_
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#define _COMMON_H_
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#include <linux/compiler.h>
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#include <linux/clk-provider.h>
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#define CCU_FEATURE_FRACTIONAL BIT(0)
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#define CCU_FEATURE_VARIABLE_PREDIV BIT(1)
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#define CCU_FEATURE_FIXED_PREDIV BIT(2)
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#define CCU_FEATURE_FIXED_POSTDIV BIT(3)
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#define CCU_FEATURE_ALL_PREDIV BIT(4)
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#define CCU_FEATURE_LOCK_REG BIT(5)
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#define CCU_FEATURE_MMC_TIMING_SWITCH BIT(6)
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#define CCU_FEATURE_SIGMA_DELTA_MOD BIT(7)
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#define CCU_FEATURE_KEY_FIELD BIT(8)
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#define CCU_FEATURE_CLOSEST_RATE BIT(9)
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/* MMC timing mode switch bit */
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#define CCU_MMC_NEW_TIMING_MODE BIT(30)
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struct device_node;
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struct ccu_common {
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void __iomem *base;
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u16 reg;
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u16 lock_reg;
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u32 prediv;
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unsigned long min_rate;
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unsigned long max_rate;
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unsigned long features;
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spinlock_t *lock;
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struct clk_hw hw;
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};
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static inline struct ccu_common *hw_to_ccu_common(struct clk_hw *hw)
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{
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return container_of(hw, struct ccu_common, hw);
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}
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struct sunxi_ccu_desc {
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struct ccu_common **ccu_clks;
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unsigned long num_ccu_clks;
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struct clk_hw_onecell_data *hw_clks;
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struct ccu_reset_map *resets;
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unsigned long num_resets;
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};
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void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock);
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bool ccu_is_better_rate(struct ccu_common *common,
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unsigned long target_rate,
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unsigned long current_rate,
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unsigned long best_rate);
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struct ccu_pll_nb {
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struct notifier_block clk_nb;
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struct ccu_common *common;
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u32 enable;
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u32 lock;
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};
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#define to_ccu_pll_nb(_nb) container_of(_nb, struct ccu_pll_nb, clk_nb)
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int ccu_pll_notifier_register(struct ccu_pll_nb *pll_nb);
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int devm_sunxi_ccu_probe(struct device *dev, void __iomem *reg,
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const struct sunxi_ccu_desc *desc);
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void of_sunxi_ccu_probe(struct device_node *node, void __iomem *reg,
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const struct sunxi_ccu_desc *desc);
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#endif /* _COMMON_H_ */
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