Prepare so we'll be able to read various other HCI registers.
While at it, fix the HCPID & HCMID register names to stand for what they
really are. Also replace the pm_runtime_{get/put}_sync() calls in
auto_hibern8_show to ufshcd_rpm_{get/put}_sync() as any host controller
register reads should.
Reviewed-by: Keoseong Park <keosung.park@xxxxxxxxxxx>
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
Signed-off-by: Avri Altman <avri.altman@xxxxxxx>
---
drivers/ufs/core/ufs-sysfs.c | 38 +++++++++++++++++++++---------------
include/ufs/ufshci.h | 5 +++--
2 files changed, 25 insertions(+), 18 deletions(-)
diff --git a/drivers/ufs/core/ufs-sysfs.c b/drivers/ufs/core/ufs-sysfs.c
index e80a32421a8c..dec7746c98e0 100644
--- a/drivers/ufs/core/ufs-sysfs.c
+++ b/drivers/ufs/core/ufs-sysfs.c
@@ -198,6 +198,24 @@ static u32 ufshcd_us_to_ahit(unsigned int timer)
FIELD_PREP(UFSHCI_AHIBERN8_SCALE_MASK, scale);
}
+static int ufshcd_read_hci_reg(struct ufs_hba *hba, u32 *val, unsigned int reg)
+{
+ down(&hba->host_sem);
+ if (!ufshcd_is_user_access_allowed(hba)) {
+ up(&hba->host_sem);
+ return -EBUSY;
+ }
+
+ ufshcd_rpm_get_sync(hba);
+ ufshcd_hold(hba);
+ *val = ufshcd_readl(hba, reg);
+ ufshcd_release(hba);
+ ufshcd_rpm_put_sync(hba);
+
+ up(&hba->host_sem);
+ return 0;
+}
+
static ssize_t auto_hibern8_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -208,23 +226,11 @@ static ssize_t auto_hibern8_show(struct device *dev,
if (!ufshcd_is_auto_hibern8_supported(hba))
return -EOPNOTSUPP;
- down(&hba->host_sem);
- if (!ufshcd_is_user_access_allowed(hba)) {
- ret = -EBUSY;
- goto out;
- }
-
- pm_runtime_get_sync(hba->dev);
- ufshcd_hold(hba);
- ahit = ufshcd_readl(hba, REG_AUTO_HIBERNATE_IDLE_TIMER);
- ufshcd_release(hba);
- pm_runtime_put_sync(hba->dev);
-
- ret = sysfs_emit(buf, "%d\n", ufshcd_ahit_to_us(ahit));
+ ret = ufshcd_read_hci_reg(hba, &ahit, REG_AUTO_HIBERNATE_IDLE_TIMER);
+ if (ret)
+ return ret;
-out:
- up(&hba->host_sem);
- return ret;
+ return sysfs_emit(buf, "%d\n", ufshcd_ahit_to_us(ahit));
}
static ssize_t auto_hibern8_store(struct device *dev,
diff --git a/include/ufs/ufshci.h b/include/ufs/ufshci.h
index 38fe97971a65..194e3655902e 100644
--- a/include/ufs/ufshci.h
+++ b/include/ufs/ufshci.h
@@ -25,8 +25,9 @@ enum {
REG_CONTROLLER_CAPABILITIES = 0x00,
REG_MCQCAP = 0x04,
REG_UFS_VERSION = 0x08,
- REG_CONTROLLER_DEV_ID = 0x10,
- REG_CONTROLLER_PROD_ID = 0x14,
+ REG_EXT_CONTROLLER_CAPABILITIES = 0x0C,
+ REG_CONTROLLER_PID = 0x10,
+ REG_CONTROLLER_MID = 0x14,
REG_AUTO_HIBERNATE_IDLE_TIMER = 0x18,
REG_INTERRUPT_STATUS = 0x20,
REG_INTERRUPT_ENABLE = 0x24,
--
2.25.1
