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authorMathieu Poirier <mathieu.poirier@linaro.org>2020-07-14 14:04:45 -0600
committerBjorn Andersson <bjorn.andersson@linaro.org>2020-07-17 17:35:03 -0700
commitefd8626213f6897b416e573e87f4582810086b93 (patch)
tree6025af98ba3c232ab855cbe5929db9e0fedef80f /drivers/remoteproc
parentbee04d4672e0e8f6b82b62b092763b88a395da22 (diff)
remoteproc: stm32: Update M4 state in stm32_rproc_stop()
Update the co-processor state in function stm32_rproc_stop() so that it can be used in scenarios where the remoteproc core is attaching to the M4. Mainly based on the work published by Arnaud Pouliquen [1]. [1]. https://patchwork.kernel.org/project/linux-remoteproc/list/?series=239877 Acked-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> Link: https://lore.kernel.org/r/20200714200445.1427257-12-mathieu.poirier@linaro.org Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc')
-rw-r--r--drivers/remoteproc/stm32_rproc.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
index 7145cd49616e..f4da42fc0eeb 100644
--- a/drivers/remoteproc/stm32_rproc.c
+++ b/drivers/remoteproc/stm32_rproc.c
@@ -504,6 +504,18 @@ static int stm32_rproc_stop(struct rproc *rproc)
}
}
+ /* update coprocessor state to OFF if available */
+ if (ddata->m4_state.map) {
+ err = regmap_update_bits(ddata->m4_state.map,
+ ddata->m4_state.reg,
+ ddata->m4_state.mask,
+ M4_STATE_OFF);
+ if (err) {
+ dev_err(&rproc->dev, "failed to set copro state\n");
+ return err;
+ }
+ }
+
return 0;
}