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    SubjectRe: [PATCH v2 09/12] remoteproc: stm32: Update M4 state in stm32_rproc_stop()
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    On 4/24/20 10:25 PM, Mathieu Poirier wrote:
    > Update the M4 co-processor state in function stm32_rproc_stop() so
    > that it can be used in synchronisation scenarios.
    >
    > Mainly based on the work published by Arnaud Pouliquen [1].
    >
    > [1]. https://patchwork.kernel.org/project/linux-remoteproc/list/?series=239877
    >
    > Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

    Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>

    Thanks,
    Arnaud

    > ---
    > drivers/remoteproc/stm32_rproc.c | 13 +++++++++++++
    > 1 file changed, 13 insertions(+)
    >
    > diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
    > index 404f17a97095..86d23c35d805 100644
    > --- a/drivers/remoteproc/stm32_rproc.c
    > +++ b/drivers/remoteproc/stm32_rproc.c
    > @@ -493,6 +493,18 @@ 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;
    > }
    >
    > @@ -531,6 +543,7 @@ static struct rproc_ops st_rproc_ops = {
    >
    > static __maybe_unused struct rproc_ops st_rproc_sync_ops = {
    > .start = stm32_rproc_sync_start,
    > + .stop = stm32_rproc_stop,
    > };
    >
    > static const struct of_device_id stm32_rproc_match[] = {
    >

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