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https://github.com/AsahiLinux/u-boot
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49b2b0a2b6
The reset array size is currently used for bounds checking in the reset driver. The same bounds check should really be done in the clock driver. Currently, the array size is provided to the reset driver separately from the CCU descriptor, which is a bit strange. Let's do this the usual way, with the array sizes next to the arrays themselves. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Andre Przywara <andre.przywara@arm.com> [Andre: add F1C100s support] Signed-off-by: Andre Przywara <andre.przywara@arm.com>
105 lines
1.9 KiB
C
105 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018 Amarula Solutions.
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* Author: Jagan Teki <jagan@amarulasolutions.com>
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*/
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#ifndef _CLK_SUNXI_H
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#define _CLK_SUNXI_H
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#include <linux/bitops.h>
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/**
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* enum ccu_flags - ccu clock/reset flags
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*
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* @CCU_CLK_F_IS_VALID: is given clock gate is valid?
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* @CCU_RST_F_IS_VALID: is given reset control is valid?
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*/
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enum ccu_flags {
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CCU_CLK_F_IS_VALID = BIT(0),
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CCU_RST_F_IS_VALID = BIT(1),
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CCU_CLK_F_DUMMY_GATE = BIT(2),
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};
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/**
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* struct ccu_clk_gate - ccu clock gate
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* @off: gate offset
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* @bit: gate bit
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* @flags: ccu clock gate flags
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*/
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struct ccu_clk_gate {
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u16 off;
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u32 bit;
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enum ccu_flags flags;
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};
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#define GATE(_off, _bit) { \
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.off = _off, \
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.bit = _bit, \
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.flags = CCU_CLK_F_IS_VALID, \
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}
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#define GATE_DUMMY { \
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.flags = CCU_CLK_F_DUMMY_GATE, \
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}
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/**
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* struct ccu_reset - ccu reset
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* @off: reset offset
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* @bit: reset bit
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* @flags: ccu reset control flags
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*/
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struct ccu_reset {
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u16 off;
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u32 bit;
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enum ccu_flags flags;
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};
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#define RESET(_off, _bit) { \
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.off = _off, \
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.bit = _bit, \
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.flags = CCU_RST_F_IS_VALID, \
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}
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/**
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* struct ccu_desc - clock control unit descriptor
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*
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* @gates: clock gates
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* @resets: reset unit
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*/
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struct ccu_desc {
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const struct ccu_clk_gate *gates;
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const struct ccu_reset *resets;
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u8 num_gates;
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u8 num_resets;
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};
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/**
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* struct ccu_priv - sunxi clock control unit
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*
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* @base: base address
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* @desc: ccu descriptor
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*/
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struct ccu_priv {
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void *base;
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const struct ccu_desc *desc;
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};
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/**
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* sunxi_clk_probe - common sunxi clock probe
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* @dev: clock device
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*/
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int sunxi_clk_probe(struct udevice *dev);
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extern struct clk_ops sunxi_clk_ops;
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/**
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* sunxi_reset_bind() - reset binding
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*
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* @dev: reset device
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* @count: reset count
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* Return: 0 success, or error value
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*/
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int sunxi_reset_bind(struct udevice *dev, ulong count);
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#endif /* _CLK_SUNXI_H */
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