| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (C) 2018 Amarula Solutions. |
| * Author: Jagan Teki <jagan@amarulasolutions.com> |
| */ |
| |
| #ifndef _ASM_ARCH_CCU_H |
| #define _ASM_ARCH_CCU_H |
| |
| #ifndef __ASSEMBLY__ |
| #include <linux/bitops.h> |
| #endif |
| |
| /** |
| * enum ccu_flags - ccu clock/reset flags |
| * |
| * @CCU_CLK_F_IS_VALID: is given clock gate is valid? |
| * @CCU_RST_F_IS_VALID: is given reset control is valid? |
| */ |
| enum ccu_flags { |
| CCU_CLK_F_IS_VALID = BIT(0), |
| CCU_RST_F_IS_VALID = BIT(1), |
| }; |
| |
| /** |
| * struct ccu_clk_gate - ccu clock gate |
| * @off: gate offset |
| * @bit: gate bit |
| * @flags: ccu clock gate flags |
| */ |
| struct ccu_clk_gate { |
| u16 off; |
| u32 bit; |
| enum ccu_flags flags; |
| }; |
| |
| #define GATE(_off, _bit) { \ |
| .off = _off, \ |
| .bit = _bit, \ |
| .flags = CCU_CLK_F_IS_VALID, \ |
| } |
| |
| /** |
| * struct ccu_reset - ccu reset |
| * @off: reset offset |
| * @bit: reset bit |
| * @flags: ccu reset control flags |
| */ |
| struct ccu_reset { |
| u16 off; |
| u32 bit; |
| enum ccu_flags flags; |
| }; |
| |
| #define RESET(_off, _bit) { \ |
| .off = _off, \ |
| .bit = _bit, \ |
| .flags = CCU_RST_F_IS_VALID, \ |
| } |
| |
| /** |
| * struct ccu_desc - clock control unit descriptor |
| * |
| * @gates: clock gates |
| * @resets: reset unit |
| */ |
| struct ccu_desc { |
| const struct ccu_clk_gate *gates; |
| const struct ccu_reset *resets; |
| }; |
| |
| /** |
| * struct ccu_priv - sunxi clock control unit |
| * |
| * @base: base address |
| * @desc: ccu descriptor |
| */ |
| struct ccu_priv { |
| void *base; |
| const struct ccu_desc *desc; |
| }; |
| |
| /** |
| * sunxi_clk_probe - common sunxi clock probe |
| * @dev: clock device |
| */ |
| int sunxi_clk_probe(struct udevice *dev); |
| |
| extern struct clk_ops sunxi_clk_ops; |
| |
| /** |
| * sunxi_reset_bind() - reset binding |
| * |
| * @dev: reset device |
| * @count: reset count |
| * @return 0 success, or error value |
| */ |
| int sunxi_reset_bind(struct udevice *dev, ulong count); |
| |
| #endif /* _ASM_ARCH_CCU_H */ |