[PATCH] remoteproc: stm32: clear MCU PDDS at firmware start
From: Fabien Dessenne <hidden>
Date: 2019-08-26 15:39:50
Also in:
linux-remoteproc, lkml
Subsystem:
remote processor (remoteproc) subsystem, the rest · Maintainers:
Bjorn Andersson, Mathieu Poirier, Linus Torvalds
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 <redacted> --- drivers/remoteproc/stm32_rproc.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
index e2da719..1c95913 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;
--
2.7.4
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