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soc: samsung: pmu: Provide global function to get PMU regmap 

PMU is something like a SoC wide service, so add a helper function to get
PMU regmap. This will be used by other Exynos device drivers. This way it
can be avoided to model this dependency in device tree (as phandles to PMU
node) for almost every device in the SoC.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
hifive-unleashed-5.1
Marek Szyprowski 2017-01-19 14:48:41 +01:00 committed by Krzysztof Kozlowski
parent 0c744ea4f7
commit 76640b84bd
2 changed files with 21 additions and 0 deletions
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11
drivers/soc/samsung/exynos-pmu.c
View File

@ -11,6 +11,7 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/mfd/syscon.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
@ -92,6 +93,16 @@ static const struct of_device_id exynos_pmu_of_device_ids[] = {
{ /*sentinel*/ },
};
struct regmap *exynos_get_pmu_regmap(void)
{
struct device_node *np = of_find_matching_node(NULL,
exynos_pmu_of_device_ids);
if (np)
return syscon_node_to_regmap(np);
return ERR_PTR(-ENODEV);
}
EXPORT_SYMBOL_GPL(exynos_get_pmu_regmap);
static int exynos_pmu_probe(struct platform_device *pdev)
{
const struct of_device_id *match;

10
include/linux/soc/samsung/exynos-pmu.h
View File

@ -12,6 +12,8 @@
#ifndef __LINUX_SOC_EXYNOS_PMU_H
#define __LINUX_SOC_EXYNOS_PMU_H
struct regmap;
enum sys_powerdown {
SYS_AFTR,
SYS_LPA,
@ -20,5 +22,13 @@ enum sys_powerdown {
};
extern void exynos_sys_powerdown_conf(enum sys_powerdown mode);
#ifdef CONFIG_EXYNOS_PMU
extern struct regmap *exynos_get_pmu_regmap(void);
#else
static inline struct regmap *exynos_get_pmu_regmap(void)
{
return ERR_PTR(-ENODEV);
}
#endif
#endif /* __LINUX_SOC_EXYNOS_PMU_H */