From mboxrd@z Thu Jan 1 00:00:00 1970 From: peter.chen@freescale.com (Peter Chen) Date: Tue, 22 Oct 2013 16:46:25 +0800 Subject: [PATCH v2 1/1] mfd: syscon: return -ENOSYS if CONFIG_MFD_SYSCON is not enabled Message-ID: <1382431585-26649-1-git-send-email-peter.chen@freescale.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Some platforms may not define CONFIG_MFD_SYSCON (or haven't syscon), it can fix build error for these platforms. Signed-off-by: Peter Chen --- Changes for v2: - Using #ifdef instead of IS_ENABLED - Using ENOSYS instead of ENXIO as return val include/linux/mfd/syscon.h | 25 +++++++++++++++++++++++++ 1 files changed, 25 insertions(+), 0 deletions(-) diff --git a/include/linux/mfd/syscon.h b/include/linux/mfd/syscon.h index b473577..8789fa3 100644 --- a/include/linux/mfd/syscon.h +++ b/include/linux/mfd/syscon.h @@ -17,10 +17,35 @@ struct device_node; +#ifdef CONFIG_MFD_SYSCON extern struct regmap *syscon_node_to_regmap(struct device_node *np); extern struct regmap *syscon_regmap_lookup_by_compatible(const char *s); extern struct regmap *syscon_regmap_lookup_by_pdevname(const char *s); extern struct regmap *syscon_regmap_lookup_by_phandle( struct device_node *np, const char *property); +#else +static inline struct regmap *syscon_node_to_regmap(struct device_node *np) +{ + return ERR_PTR(-ENOSYS); +} + +static inline struct regmap *syscon_regmap_lookup_by_compatible(const char *s) +{ + return ERR_PTR(-ENOSYS); +} + +static inline struct regmap *syscon_regmap_lookup_by_pdevname(const char *s) +{ + return ERR_PTR(-ENOSYS); +} + +static inline struct regmap *syscon_regmap_lookup_by_phandle( + struct device_node *np, + const char *property) +{ + return ERR_PTR(-ENOSYS); +} +#endif + #endif /* __LINUX_MFD_SYSCON_H__ */ -- 1.7.1