| Message ID | 20200424202505.29562-6-mathieu.poirier@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | remoteproc: stm32: Add support for synchronising with M4 | expand |
On Fri 24 Apr 13:24 PDT 2020, Mathieu Poirier wrote: > Get from the DT the syncon to probe the state of the remote processor > and the location of the resource table. > > 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: Loic Pallardy <loic.pallardy@st.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> > --- > drivers/remoteproc/stm32_rproc.c | 26 ++++++++++++++++++++++++++ > 1 file changed, 26 insertions(+) > > diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c > index 658439d4b00a..a285f338bed8 100644 > --- a/drivers/remoteproc/stm32_rproc.c > +++ b/drivers/remoteproc/stm32_rproc.c > @@ -70,6 +70,8 @@ struct stm32_rproc { > struct reset_control *rst; > struct stm32_syscon hold_boot; > struct stm32_syscon pdds; > + struct stm32_syscon m4_state; > + struct stm32_syscon rsctbl; > int wdg_irq; > u32 nb_rmems; > struct stm32_rproc_mem *rmems; > @@ -606,6 +608,30 @@ static int stm32_rproc_parse_dt(struct platform_device *pdev, > > *auto_boot = of_property_read_bool(np, "st,auto-boot"); > > + /* > + * See if we can check the M4 status, i.e if it was started > + * from the boot loader or not. > + */ > + err = stm32_rproc_get_syscon(np, "st,syscfg-m4-state", > + &ddata->m4_state); > + if (err) { > + /* remember this */ > + ddata->m4_state.map = NULL; > + /* no coprocessor state syscon (optional) */ > + dev_warn(dev, "m4 state not supported\n"); > + > + /* no need to go further */ > + return 0; > + } > + > + /* See if we can get the resource table */ > + err = stm32_rproc_get_syscon(np, "st,syscfg-rsc-tbl", > + &ddata->rsctbl); > + if (err) { > + /* no rsc table syscon (optional) */ > + dev_warn(dev, "rsc tbl syscon not supported\n"); > + } > + > return 0; > } > > -- > 2.20.1 >
diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c index 658439d4b00a..a285f338bed8 100644 --- a/drivers/remoteproc/stm32_rproc.c +++ b/drivers/remoteproc/stm32_rproc.c @@ -70,6 +70,8 @@ struct stm32_rproc { struct reset_control *rst; struct stm32_syscon hold_boot; struct stm32_syscon pdds; + struct stm32_syscon m4_state; + struct stm32_syscon rsctbl; int wdg_irq; u32 nb_rmems; struct stm32_rproc_mem *rmems; @@ -606,6 +608,30 @@ static int stm32_rproc_parse_dt(struct platform_device *pdev, *auto_boot = of_property_read_bool(np, "st,auto-boot"); + /* + * See if we can check the M4 status, i.e if it was started + * from the boot loader or not. + */ + err = stm32_rproc_get_syscon(np, "st,syscfg-m4-state", + &ddata->m4_state); + if (err) { + /* remember this */ + ddata->m4_state.map = NULL; + /* no coprocessor state syscon (optional) */ + dev_warn(dev, "m4 state not supported\n"); + + /* no need to go further */ + return 0; + } + + /* See if we can get the resource table */ + err = stm32_rproc_get_syscon(np, "st,syscfg-rsc-tbl", + &ddata->rsctbl); + if (err) { + /* no rsc table syscon (optional) */ + dev_warn(dev, "rsc tbl syscon not supported\n"); + } + return 0; }