From: Bhupesh Sharma bhupesh.linux@gmail.com
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 b55c4a9e996..555f8a6857d 100644 --- a/drivers/ufs/ufs.h +++ b/drivers/ufs/ufs.h @@ -3,6 +3,7 @@ #define __UFS_H
#include <linux/types.h> +#include <asm/io.h> #include "unipro.h"
struct udevice; @@ -933,6 +934,23 @@ 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