Commit efd86262 authored Jul 14, 2020 by Mathieu Poirier Committed by Bjorn Andersson Jul 17, 2020

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>

parent bee04d46

drivers/remoteproc/stm32_rproc.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}

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