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.sha...@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
--
2.38.1
