mfd: ssbi: Constify buffer in ssbi_write

In preparation for passing a const pointer directly to
ssbi_write() from the regmap APIs.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/mfd/ssbi.c b/drivers/mfd/ssbi.c
index 435c6f7a3b72..dd1d28f343f6 100644
--- a/drivers/mfd/ssbi.c
+++ b/drivers/mfd/ssbi.c
@@ -77,7 +77,7 @@ struct ssbi {
         spinlock_t              lock;
         enum ssbi_controller_type controller_type;
         int (*read)(struct ssbi *, u16 addr, u8 *buf, int len);
-        int (*write)(struct ssbi *, u16 addr, u8 *buf, int len);
+        int (*write)(struct ssbi *, u16 addr, const u8 *buf, int len);
 };
 
 #define to_ssbi(dev)    platform_get_drvdata(to_platform_device(dev))
@@ -146,7 +146,7 @@ err:
 }
 
 static int
-ssbi_write_bytes(struct ssbi *ssbi, u16 addr, u8 *buf, int len)
+ssbi_write_bytes(struct ssbi *ssbi, u16 addr, const u8 *buf, int len)
 {
         int ret = 0;
 
@@ -223,7 +223,7 @@ err:
 }
 
 static int
-ssbi_pa_write_bytes(struct ssbi *ssbi, u16 addr, u8 *buf, int len)
+ssbi_pa_write_bytes(struct ssbi *ssbi, u16 addr, const u8 *buf, int len)
 {
         u32 cmd;
         int ret = 0;
@@ -255,7 +255,7 @@ int ssbi_read(struct device *dev, u16 addr, u8 *buf, int len)
 }
 EXPORT_SYMBOL_GPL(ssbi_read);
 
-int ssbi_write(struct device *dev, u16 addr, u8 *buf, int len)
+int ssbi_write(struct device *dev, u16 addr, const u8 *buf, int len)
 {
         struct ssbi *ssbi = to_ssbi(dev);
         unsigned long flags;