diff options
Diffstat (limited to 'drivers/clk/mediatek/reset.h')
-rw-r--r-- | drivers/clk/mediatek/reset.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/drivers/clk/mediatek/reset.h b/drivers/clk/mediatek/reset.h new file mode 100644 index 0000000000..6a58a3d591 --- /dev/null +++ b/drivers/clk/mediatek/reset.h @@ -0,0 +1,82 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2022 MediaTek Inc. + */ + +#ifndef __DRV_CLK_MTK_RESET_H +#define __DRV_CLK_MTK_RESET_H + +#include <linux/reset-controller.h> +#include <linux/types.h> + +#define RST_NR_PER_BANK 32 + +/* Infra global controller reset set register */ +#define INFRA_RST0_SET_OFFSET 0x120 +#define INFRA_RST1_SET_OFFSET 0x130 +#define INFRA_RST2_SET_OFFSET 0x140 +#define INFRA_RST3_SET_OFFSET 0x150 +#define INFRA_RST4_SET_OFFSET 0x730 + +/** + * enum mtk_reset_version - Version of MediaTek clock reset controller. + * @MTK_RST_SIMPLE: Use the same registers for bit set and clear. + * @MTK_RST_SET_CLR: Use separate registers for bit set and clear. + * @MTK_RST_MAX: Total quantity of version for MediaTek clock reset controller. + */ +enum mtk_reset_version { + MTK_RST_SIMPLE = 0, + MTK_RST_SET_CLR, + MTK_RST_MAX, +}; + +/** + * struct mtk_clk_rst_desc - Description of MediaTek clock reset. + * @version: Reset version which is defined in enum mtk_reset_version. + * @rst_bank_ofs: Pointer to an array containing base offsets of the reset register. + * @rst_bank_nr: Quantity of reset bank. + * @rst_idx_map:Pointer to an array containing ids if input argument is index. + * This array is not necessary if our input argument does not mean index. + * @rst_idx_map_nr: Quantity of reset index map. + */ +struct mtk_clk_rst_desc { + enum mtk_reset_version version; + u16 *rst_bank_ofs; + u32 rst_bank_nr; + u16 *rst_idx_map; + u32 rst_idx_map_nr; +}; + +/** + * struct mtk_clk_rst_data - Data of MediaTek clock reset controller. + * @regmap: Pointer to base address of reset register address. + * @rcdev: Reset controller device. + * @desc: Pointer to description of the reset controller. + */ +struct mtk_clk_rst_data { + struct regmap *regmap; + struct reset_controller_dev rcdev; + const struct mtk_clk_rst_desc *desc; +}; + +/** + * mtk_register_reset_controller - Register MediaTek clock reset controller + * @np: Pointer to device node. + * @desc: Constant pointer to description of clock reset. + * + * Return: 0 on success and errorno otherwise. + */ +int mtk_register_reset_controller(struct device_node *np, + const struct mtk_clk_rst_desc *desc); + +/** + * mtk_register_reset_controller - Register mediatek clock reset controller with device + * @np: Pointer to device. + * @desc: Constant pointer to description of clock reset. + * + * Return: 0 on success and errorno otherwise. + */ +int mtk_register_reset_controller_with_dev(struct device *dev, + const struct mtk_clk_rst_desc *desc); + +#endif /* __DRV_CLK_MTK_RESET_H */ |