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authorFabien Dessenne <fabien.dessenne@st.com>2019-08-26 17:38:06 +0200
committerBjorn Andersson <bjorn.andersson@linaro.org>2019-08-26 14:52:26 -0700
commitabbe429d56168b90c03bc548403d72505e4fd6b2 (patch)
tree148da9574efb42e93b80b2e915ae31df1b683891 /drivers/remoteproc
parentf2583fde2719362039a6efb3b4094f46284df541 (diff)
downloadlinux-abbe429d56168b90c03bc548403d72505e4fd6b2.tar.gz
remoteproc: stm32: clear MCU PDDS at firmware start
When remoteproc stops a firmware, it sets the MCU PDDS flag, allowing the platform to reach the Standby power mode if needed. Symmetrically, clear this flag before running a firmware. This fixes the issue where the system goes to Standby mode when the MCU crashes while MPU is in CSTOP mode. Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc')
-rw-r--r--drivers/remoteproc/stm32_rproc.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
index e2da7198b65f..1c959131d796 100644
--- a/drivers/remoteproc/stm32_rproc.c
+++ b/drivers/remoteproc/stm32_rproc.c
@@ -383,10 +383,21 @@ static void stm32_rproc_add_coredump_trace(struct rproc *rproc)
static int stm32_rproc_start(struct rproc *rproc)
{
+ struct stm32_rproc *ddata = rproc->priv;
int err;
stm32_rproc_add_coredump_trace(rproc);
+ /* clear remote proc Deep Sleep */
+ if (ddata->pdds.map) {
+ err = regmap_update_bits(ddata->pdds.map, ddata->pdds.reg,
+ ddata->pdds.mask, 0);
+ if (err) {
+ dev_err(&rproc->dev, "failed to clear pdds\n");
+ return err;
+ }
+ }
+
err = stm32_rproc_set_hold_boot(rproc, false);
if (err)
return err;