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| author | Mathieu Poirier <mathieu.poirier@linaro.org> | 2020-07-14 14:04:45 -0600 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2020-07-17 17:35:03 -0700 |
| commit | efd8626213f6897b416e573e87f4582810086b93 (patch) | |
| tree | 6025af98ba3c232ab855cbe5929db9e0fedef80f /drivers/remoteproc/stm32_rproc.c | |
| parent | bee04d4672e0e8f6b82b62b092763b88a395da22 (diff) | |
| download | lwn-efd8626213f6897b416e573e87f4582810086b93.tar.gz lwn-efd8626213f6897b416e573e87f4582810086b93.zip | |
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/stm32_rproc.c')
| -rw-r--r-- | drivers/remoteproc/stm32_rproc.c | 12 |
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; } |