[PATCH 05/15] scsi: ufs: ufs-exynos: get sysreg regmap for io-coherency

[Chanho Park <chanho61.park@samsung.com>]

UFS_EMBD sharability register of fsys block provides "sharability"
setting of ufs-exynos. It can be set via syscon and regmap.

Signed-off-by: Chanho Park <chanho61.park@samsung.com>
---
 drivers/scsi/ufs/ufs-exynos.c | 5 +++++
 drivers/scsi/ufs/ufs-exynos.h | 1 +
 2 files changed, 6 insertions(+)

diff --git a/drivers/scsi/ufs/ufs-exynos.c b/drivers/scsi/ufs/ufs-exynos.c
index db5892901cc0..da02ad3b036c 100644
--- a/drivers/scsi/ufs/ufs-exynos.c
+++ b/drivers/scsi/ufs/ufs-exynos.c
@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/mfd/syscon.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
 
@@ -906,6 +907,10 @@ static int exynos_ufs_parse_dt(struct device *dev, struct exynos_ufs *ufs)
 		goto out;
 	}
 
+	ufs->sysreg = syscon_regmap_lookup_by_phandle(np, "sysreg");
+	if (IS_ERR(ufs->sysreg))
+		ufs->sysreg = NULL;
+
 	ufs->pclk_avail_min = PCLK_AVAIL_MIN;
 	ufs->pclk_avail_max = PCLK_AVAIL_MAX;
 
diff --git a/drivers/scsi/ufs/ufs-exynos.h b/drivers/scsi/ufs/ufs-exynos.h
index 7bf2053f6e90..a46f30639f38 100644
--- a/drivers/scsi/ufs/ufs-exynos.h
+++ b/drivers/scsi/ufs/ufs-exynos.h
@@ -191,6 +191,7 @@ struct exynos_ufs {
 	struct ufs_phy_time_cfg t_cfg;
 	ktime_t entry_hibern8_t;
 	const struct exynos_ufs_drv_data *drv_data;
+	struct regmap *sysreg;
 
 	u32 opts;
 #define EXYNOS_UFS_OPT_HAS_APB_CLK_CTRL		BIT(0)
-- 
2.32.0