diff options
| author | Eduardo Valentin <eduardo.valentin@ti.com> | 2012-07-30 12:36:36 +0800 |
|---|---|---|
| committer | Andy Green <andy.green@linaro.org> | 2012-07-30 12:36:36 +0800 |
| commit | ea6395da63fd747e3c3c12e55d0497d66a0c971a (patch) | |
| tree | 936309f1dfa6fc0202cbab2bd99be084a7d148ab /include | |
| parent | 363438f13dc039e971bfa53c3331e9d750ab9d00 (diff) | |
mfd: omap: control: core system control driver
This patch introduces a MFD core device driver for
OMAP system control module.
The control module allows software control of
various static modes supported by the device. It is
composed of two control submodules: general control
module and device (padconfiguration) control
module.
In this patch, the children defined are for:
. USB-phy pin control
. Bangap temperature sensor
Device driver is probed with postcore_initcall.
However, as some of the APIs exposed by this driver
may be needed in very early init phase, an early init
class is also available: "early_omap_control".
Change-Id: I0e5a62508dbdfe0a677c9d833cf52474cd8b625e
Signed-off-by: J Keerthy <j-keerthy@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Radhesh Fadnis <radhesh.fadnis@ti.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mfd/omap_control.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/include/linux/mfd/omap_control.h b/include/linux/mfd/omap_control.h new file mode 100644 index 000000000000..b9198828fee0 --- /dev/null +++ b/include/linux/mfd/omap_control.h @@ -0,0 +1,67 @@ +/* + * OMAP system control module header file + * + * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/ + * Contact: + * J Keerthy <j-keerthy@ti.com> + * Moiz Sonasath <m-sonasath@ti.com> + * Abraham, Kishon Vijay <kishon@ti.com> + * Eduardo Valentin <eduardo.valentin@ti.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * 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 __DRIVERS_OMAP_CONTROL_H +#define __DRIVERS_OMAP_CONTROL_H + +/** + * struct system control module - scm device structure + * @dev: device pointer + * @base: Base of the temp I/O + * @reglock: protect omap_control structure + * @use_count: track API users + */ +struct omap_control { + struct device *dev; + void __iomem *base; + /* protect this data structure and register access */ + spinlock_t reglock; + int use_count; +}; + +#ifdef CONFIG_MFD_OMAP_CONTROL +extern int omap_control_readl(struct device *dev, u32 reg, u32 *val); +extern int omap_control_writel(struct device *dev, u32 val, u32 reg); +extern struct device *omap_control_get(void); +extern void omap_control_put(struct device *dev); +#else +static inline int omap_control_readl(struct device *dev, u32 reg, u32 *val) +{ + return 0; +} + +static inline int omap_control_writel(struct device *dev, u32 val, u32 reg) +{ + return 0; +} + +static inline struct device *omap_control_get(void) +{ + return ERR_PTR(-EINVAL); +} + +static inline void omap_control_put(struct device *dev) +{ + +} +#endif + +#endif /* __DRIVERS_OMAP_CONTROL_H */ |