thermal: imx_tmu: Fix the polling default
When the 'polling-delay' property is not passed via devicetree,
pdata->polling_delay keeps at 0. This causes the imx_tmu driver to get
stuck inside the busy while() loop when the CPU temperature is above
the alert point.
Fix this problem by passing a one second polling interval, which provides
a proper delay to let the system to cool down and exit the while() loop
when the temperature is below the alert point.
Signed-off-by: Fabio Estevam <festevam@denx.de>
diff --git a/drivers/thermal/imx_tmu.c b/drivers/thermal/imx_tmu.c
index 97efc55..d9a04ea 100644
--- a/drivers/thermal/imx_tmu.c
+++ b/drivers/thermal/imx_tmu.c
@@ -37,6 +37,7 @@
#define TER_ADC_PD 0x40000000
#define TER_ALPF 0x3
+#define IMX_TMU_POLLING_DELAY_MS 1000
/*
* i.MX TMU Registers
*/
@@ -574,6 +575,8 @@
dev_dbg(dev, "%s\n", __func__);
+ pdata->polling_delay = IMX_TMU_POLLING_DELAY_MS;
+
if (pdata->zone_node) {
pdata->regs = (union tmu_regs *)dev_read_addr_ptr(dev);
@@ -602,7 +605,8 @@
dev_dbg(dev, "args.args_count %d, id %d\n", args.args_count, pdata->id);
- pdata->polling_delay = dev_read_u32_default(dev, "polling-delay", 1000);
+ pdata->polling_delay = dev_read_u32_default(dev, "polling-delay",
+ IMX_TMU_POLLING_DELAY_MS);
trips_np = ofnode_path("/thermal-zones/cpu-thermal/trips");
ofnode_for_each_subnode(trips_np, trips_np) {