Add definition of 'ufshcd_rmwl()' helper function which would be later used by Qualcomm UFS driver to read-modify-write registers.
Signed-off-by: Bhupesh Sharma bhupesh.sharma@linaro.org --- drivers/ufs/ufs.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/drivers/ufs/ufs.h b/drivers/ufs/ufs.h index 8a38832b05..c9320a905e 100644 --- a/drivers/ufs/ufs.h +++ b/drivers/ufs/ufs.h @@ -2,6 +2,7 @@ #ifndef __UFS_H #define __UFS_H
+#include <asm/io.h> #include "unipro.h"
struct udevice; @@ -906,6 +907,23 @@ enum { #define ufshcd_readl(hba, reg) \ readl((hba)->mmio_base + (reg))
+/** + * ufshcd_rmwl - perform read/modify/write for a controller register + * @hba: per adapter instance + * @mask: mask to apply on read value + * @val: actual value to write + * @reg: register address + */ +static inline void ufshcd_rmwl(struct ufs_hba *hba, u32 mask, u32 val, u32 reg) +{ + u32 tmp; + + tmp = ufshcd_readl(hba, reg); + tmp &= ~mask; + tmp |= (val & mask); + ufshcd_writel(hba, tmp, reg); +} + /* UTRLRSR - UTP Transfer Request Run-Stop Register 60h */ #define UTP_TRANSFER_REQ_LIST_RUN_STOP_BIT 0x1