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| author | Stephen Boyd <sboyd@codeaurora.org> | 2015-08-06 12:37:42 +0200 |
|---|---|---|
| committer | Stephen Boyd <sboyd@codeaurora.org> | 2015-09-17 00:22:35 +0200 |
| commit | 45dd0e55317ccb27fe8eae639275c2b3a2fb52e5 (patch) | |
| tree | 6447319b8acb748a2ab66ab10c4c781af2cbb264 /drivers/clk/qcom/gdsc.h | |
| parent | clk: divider: handle integer overflow when dividing large clock rates (diff) | |
| download | linux-45dd0e55317ccb27fe8eae639275c2b3a2fb52e5.tar.xz linux-45dd0e55317ccb27fe8eae639275c2b3a2fb52e5.zip | |
clk: qcom: Add support for GDSCs
GDSCs (Global Distributed Switch Controllers) are responsible for
safely collapsing and restoring power to peripherals in the SoC.
These are best modelled as power domains using genpd and given
the registers are scattered throughout the clock controller register
space, its best to have the support added through the clock driver.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk/qcom/gdsc.h')
| -rw-r--r-- | drivers/clk/qcom/gdsc.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/clk/qcom/gdsc.h b/drivers/clk/qcom/gdsc.h new file mode 100644 index 000000000000..f578a0cce425 --- /dev/null +++ b/drivers/clk/qcom/gdsc.h @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef __QCOM_GDSC_H__ +#define __QCOM_GDSC_H__ + +#include <linux/err.h> +#include <linux/pm_domain.h> + +struct regmap; + +/** + * struct gdsc - Globally Distributed Switch Controller + * @pd: generic power domain + * @regmap: regmap for MMIO accesses + * @gdscr: gsdc control register + */ +struct gdsc { + struct generic_pm_domain pd; + struct regmap *regmap; + unsigned int gdscr; +}; + +#ifdef CONFIG_QCOM_GDSC +int gdsc_register(struct device *, struct gdsc **, size_t n, struct regmap *); +void gdsc_unregister(struct device *); +#else +static inline int gdsc_register(struct device *d, struct gdsc **g, size_t n, + struct regmap *r) +{ + return -ENOSYS; +} + +static inline void gdsc_unregister(struct device *d) {}; +#endif /* CONFIG_QCOM_GDSC */ +#endif /* __QCOM_GDSC_H__ */ |