diff options
Diffstat (limited to 'drivers/clk/qcom/gdsc.h')
| -rw-r--r-- | drivers/clk/qcom/gdsc.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/drivers/clk/qcom/gdsc.h b/drivers/clk/qcom/gdsc.h new file mode 100644 index 000000000..803512688 --- /dev/null +++ b/drivers/clk/qcom/gdsc.h @@ -0,0 +1,99 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2015, 2017-2018, 2022, The Linux Foundation. All rights reserved. + */ + +#ifndef __QCOM_GDSC_H__ +#define __QCOM_GDSC_H__ + +#include <linux/err.h> +#include <linux/pm_domain.h> + +struct regmap; +struct regulator; +struct reset_controller_dev; + +/** + * struct gdsc - Globally Distributed Switch Controller + * @pd: generic power domain + * @regmap: regmap for MMIO accesses + * @gdscr: gsdc control register + * @collapse_ctrl: APCS collapse-vote register + * @collapse_mask: APCS collapse-vote mask + * @gds_hw_ctrl: gds_hw_ctrl register + * @cxcs: offsets of branch registers to toggle mem/periph bits in + * @cxc_count: number of @cxcs + * @pwrsts: Possible powerdomain power states + * @en_rest_wait_val: transition delay value for receiving enr ack signal + * @en_few_wait_val: transition delay value for receiving enf ack signal + * @clk_dis_wait_val: transition delay value for halting clock + * @resets: ids of resets associated with this gdsc + * @reset_count: number of @resets + * @rcdev: reset controller + */ +struct gdsc { + struct generic_pm_domain pd; + struct generic_pm_domain *parent; + struct regmap *regmap; + unsigned int gdscr; + unsigned int collapse_ctrl; + unsigned int collapse_mask; + unsigned int gds_hw_ctrl; + unsigned int clamp_io_ctrl; + unsigned int *cxcs; + unsigned int cxc_count; + unsigned int en_rest_wait_val; + unsigned int en_few_wait_val; + unsigned int clk_dis_wait_val; + const u8 pwrsts; +/* Powerdomain allowable state bitfields */ +#define PWRSTS_OFF BIT(0) +/* + * There is no SW control to transition a GDSC into + * PWRSTS_RET. This happens in HW when the parent + * domain goes down to a low power state + */ +#define PWRSTS_RET BIT(1) +#define PWRSTS_ON BIT(2) +#define PWRSTS_OFF_ON (PWRSTS_OFF | PWRSTS_ON) +#define PWRSTS_RET_ON (PWRSTS_RET | PWRSTS_ON) + const u16 flags; +#define VOTABLE BIT(0) +#define CLAMP_IO BIT(1) +#define HW_CTRL BIT(2) +#define SW_RESET BIT(3) +#define AON_RESET BIT(4) +#define POLL_CFG_GDSCR BIT(5) +#define ALWAYS_ON BIT(6) +#define RETAIN_FF_ENABLE BIT(7) +#define NO_RET_PERIPH BIT(8) + struct reset_controller_dev *rcdev; + unsigned int *resets; + unsigned int reset_count; + + const char *supply; + struct regulator *rsupply; +}; + +struct gdsc_desc { + struct device *dev; + struct gdsc **scs; + size_t num; +}; + +#ifdef CONFIG_QCOM_GDSC +int gdsc_register(struct gdsc_desc *desc, struct reset_controller_dev *, + struct regmap *); +void gdsc_unregister(struct gdsc_desc *desc); +int gdsc_gx_do_nothing_enable(struct generic_pm_domain *domain); +#else +static inline int gdsc_register(struct gdsc_desc *desc, + struct reset_controller_dev *rcdev, + struct regmap *r) +{ + return -ENOSYS; +} + +static inline void gdsc_unregister(struct gdsc_desc *desc) {}; +#endif /* CONFIG_QCOM_GDSC */ +#endif /* __QCOM_GDSC_H__ */ |