diff mbox series

[v3,3/3] bus: mhi: core: Use poll register read API for RDDM download

Message ID 1614138270-2374-4-git-send-email-bbhatt@codeaurora.org (mailing list archive)
State Superseded
Headers show
Series Polling for MHI ready | expand

Commit Message

Bhaumik Bhatt Feb. 24, 2021, 3:44 a.m. UTC 
Make use of mhi_poll_reg_field() API in order to poll for RDDM
download in panic path to employ a common approach throughout the
driver.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
---
 drivers/bus/mhi/core/boot.c | 20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

Comments

Jeffrey Hugo March 10, 2021, 7:04 p.m. UTC | #1 
On 2/23/2021 8:44 PM, Bhaumik Bhatt wrote:
> Make use of mhi_poll_reg_field() API in order to poll for RDDM
> download in panic path to employ a common approach throughout the
> driver.
> 
> Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>

Seems ok to me.

Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
diff mbox series

Patch

diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c
index c2546bf..b9c44e0 100644
--- a/drivers/bus/mhi/core/boot.c
+++ b/drivers/bus/mhi/core/boot.c
@@ -60,7 +60,6 @@  static int __mhi_download_rddm_in_panic(struct mhi_controller *mhi_cntrl)
 	u32 rx_status;
 	enum mhi_ee_type ee;
 	const u32 delayus = 2000;
-	u32 retry = (mhi_cntrl->timeout_ms * 1000) / delayus;
 	const u32 rddm_timeout_us = 200000;
 	int rddm_retry = rddm_timeout_us / delayus;
 	void __iomem *base = mhi_cntrl->bhie;
@@ -125,19 +124,12 @@  static int __mhi_download_rddm_in_panic(struct mhi_controller *mhi_cntrl)
 		"Waiting for RDDM image download via BHIe, current EE:%s\n",
 		TO_MHI_EXEC_STR(ee));
 
-	while (retry--) {
-		ret = mhi_read_reg_field(mhi_cntrl, base, BHIE_RXVECSTATUS_OFFS,
-					 BHIE_RXVECSTATUS_STATUS_BMSK,
-					 BHIE_RXVECSTATUS_STATUS_SHFT,
-					 &rx_status);
-		if (ret)
-			return -EIO;
-
-		if (rx_status == BHIE_RXVECSTATUS_STATUS_XFER_COMPL)
-			return 0;
-
-		udelay(delayus);
-	}
+	ret = mhi_poll_reg_field(mhi_cntrl, base, BHIE_RXVECSTATUS_OFFS,
+				 BHIE_RXVECSTATUS_STATUS_BMSK,
+				 BHIE_RXVECSTATUS_STATUS_SHFT,
+				 BHIE_RXVECSTATUS_STATUS_XFER_COMPL, delayus);
+	if (!ret)
+		return 0;
 
 	ee = mhi_get_exec_env(mhi_cntrl);
 	ret = mhi_read_reg(mhi_cntrl, base, BHIE_RXVECSTATUS_OFFS, &rx_status);