[PATCH 1/4] remoteproc: qcom: q6v5-mss: Use regmap_read_poll_timeout

Sibi Sankar
2020-01-17T13:51:54Z

Replace the loop for HALT_ACK detection with regmap_read_poll_timeout.

Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
---
drivers/remoteproc/qcom_q6v5_mss.c | 16 ++++++----------
1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index 51f451311f5fc..f20b39c6ff0ed 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -73,6 +73,7 @@
#define NAV_AXI_IDLE_BIT BIT(2)

#define HALT_ACK_TIMEOUT_MS 100
+#define NAV_HALT_ACK_TIMEOUT_US 200

/* QDSP6SS_RESET */
#define Q6SS_STOP_CORE BIT(0)
@@ -746,7 +747,6 @@ static void q6v5proc_halt_nav_axi_port(struct q6v5 *qproc,
struct regmap *halt_map,
u32 offset)
{
- unsigned long timeout;
unsigned int val;
int ret;

@@ -760,15 +760,11 @@ static void q6v5proc_halt_nav_axi_port(struct q6v5 *qproc,
NAV_AXI_HALTREQ_BIT);

/* Wait for halt ack*/
- timeout = jiffies + msecs_to_jiffies(HALT_ACK_TIMEOUT_MS);
- for (;;) {
- ret = regmap_read(halt_map, offset, &val);
- if (ret || (val & NAV_AXI_HALTACK_BIT) ||
- time_after(jiffies, timeout))
- break;
-
- udelay(5);
- }
+ ret = regmap_read_poll_timeout(halt_map, offset, val,
+ (val & NAV_AXI_HALTACK_BIT),
+ 5, NAV_HALT_ACK_TIMEOUT_US);
+ if (ret)
+ dev_err(qproc->dev, "nav halt ack timeout\n");

ret = regmap_read(halt_map, offset, &val);
if (ret || !(val & NAV_AXI_IDLE_BIT))
--
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