This is done via RPC call to SCU.
Signed-off-by: Daniel Baluta <[email protected]>
---
Changes since v2: (as per Aisheng's review)
- rename address with phys_address
- remove unnecessary uint8_t cast
- use 'true' as last parameter of imx_scu_call_rpc to actually
wait for a response from SCU.
drivers/firmware/imx/misc.c | 38 +++++++++++++++++++++++++++
include/linux/firmware/imx/svc/misc.h | 3 +++
2 files changed, 41 insertions(+)
diff --git a/drivers/firmware/imx/misc.c b/drivers/firmware/imx/misc.c
index 97f5424dbac9..4b56a587dacd 100644
--- a/drivers/firmware/imx/misc.c
+++ b/drivers/firmware/imx/misc.c
@@ -18,6 +18,14 @@ struct imx_sc_msg_req_misc_set_ctrl {
u16 resource;
} __packed;
+struct imx_sc_msg_req_cpu_start {
+ struct imx_sc_rpc_msg hdr;
+ u32 address_hi;
+ u32 address_lo;
+ u16 resource;
+ u8 enable;
+} __packed;
+
struct imx_sc_msg_req_misc_get_ctrl {
struct imx_sc_rpc_msg hdr;
u32 ctrl;
@@ -97,3 +105,33 @@ int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32 resource,
return 0;
}
EXPORT_SYMBOL(imx_sc_misc_get_control);
+
+/*
+ * This function starts/stops a CPU identified by @resource
+ *
+ * @param[in] ipc IPC handle
+ * @param[in] resource resource the control is associated with
+ * @param[in] enable true for start, false for stop
+ * @param[in] phys_addr initial instruction address to be executed
+ *
+ * @return Returns 0 for success and < 0 for errors.
+ */
+int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
+ bool enable, u64 phys_addr)
+{
+ struct imx_sc_msg_req_cpu_start msg;
+ struct imx_sc_rpc_msg *hdr = &msg.hdr;
+
+ hdr->ver = IMX_SC_RPC_VERSION;
+ hdr->svc = IMX_SC_RPC_SVC_PM;
+ hdr->func = IMX_SC_PM_FUNC_CPU_START;
+ hdr->size = 4;
+
+ msg.address_hi = phys_addr >> 32;
+ msg.address_lo = phys_addr;
+ msg.resource = resource;
+ msg.enable = enable;
+
+ return imx_scu_call_rpc(ipc, &msg, true);
+}
+EXPORT_SYMBOL(imx_sc_pm_cpu_start);
diff --git a/include/linux/firmware/imx/svc/misc.h b/include/linux/firmware/imx/svc/misc.h
index e21c49aba92f..031dd4d3c766 100644
--- a/include/linux/firmware/imx/svc/misc.h
+++ b/include/linux/firmware/imx/svc/misc.h
@@ -52,4 +52,7 @@ int imx_sc_misc_set_control(struct imx_sc_ipc *ipc, u32 resource,
int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32 resource,
u8 ctrl, u32 *val);
+int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
+ bool enable, u64 phys_addr);
+
#endif /* _SC_MISC_API_H */
--
2.17.1
> -----Original Message-----
> From: Daniel Baluta
> Sent: Wednesday, January 30, 2019 9:30 PM
> To: [email protected]
> Cc: [email protected]; [email protected]; [email protected];
> dl-linux-imx <[email protected]>; [email protected]; Aisheng Dong
> <[email protected]>; [email protected];
> [email protected]; S.j. Wang <[email protected]>; Daniel
> Baluta <[email protected]>
> Subject: [PATCH v3] firmware: imx: Add support to start/stop a CPU
>
> This is done via RPC call to SCU.
>
> Signed-off-by: Daniel Baluta <[email protected]>
Reviewed-by: Dong Aisheng <[email protected]>
Regards
Dong Aisheng
> ---
> Changes since v2: (as per Aisheng's review)
> - rename address with phys_address
> - remove unnecessary uint8_t cast
> - use 'true' as last parameter of imx_scu_call_rpc to actually
> wait for a response from SCU.
>
> drivers/firmware/imx/misc.c | 38
> +++++++++++++++++++++++++++
> include/linux/firmware/imx/svc/misc.h | 3 +++
> 2 files changed, 41 insertions(+)
>
> diff --git a/drivers/firmware/imx/misc.c b/drivers/firmware/imx/misc.c index
> 97f5424dbac9..4b56a587dacd 100644
> --- a/drivers/firmware/imx/misc.c
> +++ b/drivers/firmware/imx/misc.c
> @@ -18,6 +18,14 @@ struct imx_sc_msg_req_misc_set_ctrl {
> u16 resource;
> } __packed;
>
> +struct imx_sc_msg_req_cpu_start {
> + struct imx_sc_rpc_msg hdr;
> + u32 address_hi;
> + u32 address_lo;
> + u16 resource;
> + u8 enable;
> +} __packed;
> +
> struct imx_sc_msg_req_misc_get_ctrl {
> struct imx_sc_rpc_msg hdr;
> u32 ctrl;
> @@ -97,3 +105,33 @@ int imx_sc_misc_get_control(struct imx_sc_ipc *ipc,
> u32 resource,
> return 0;
> }
> EXPORT_SYMBOL(imx_sc_misc_get_control);
> +
> +/*
> + * This function starts/stops a CPU identified by @resource
> + *
> + * @param[in] ipc IPC handle
> + * @param[in] resource resource the control is associated with
> + * @param[in] enable true for start, false for stop
> + * @param[in] phys_addr initial instruction address to be executed
> + *
> + * @return Returns 0 for success and < 0 for errors.
> + */
> +int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
> + bool enable, u64 phys_addr)
> +{
> + struct imx_sc_msg_req_cpu_start msg;
> + struct imx_sc_rpc_msg *hdr = &msg.hdr;
> +
> + hdr->ver = IMX_SC_RPC_VERSION;
> + hdr->svc = IMX_SC_RPC_SVC_PM;
> + hdr->func = IMX_SC_PM_FUNC_CPU_START;
> + hdr->size = 4;
> +
> + msg.address_hi = phys_addr >> 32;
> + msg.address_lo = phys_addr;
> + msg.resource = resource;
> + msg.enable = enable;
> +
> + return imx_scu_call_rpc(ipc, &msg, true); }
> +EXPORT_SYMBOL(imx_sc_pm_cpu_start);
> diff --git a/include/linux/firmware/imx/svc/misc.h
> b/include/linux/firmware/imx/svc/misc.h
> index e21c49aba92f..031dd4d3c766 100644
> --- a/include/linux/firmware/imx/svc/misc.h
> +++ b/include/linux/firmware/imx/svc/misc.h
> @@ -52,4 +52,7 @@ int imx_sc_misc_set_control(struct imx_sc_ipc *ipc, u32
> resource, int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32 resource,
> u8 ctrl, u32 *val);
>
> +int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
> + bool enable, u64 phys_addr);
> +
> #endif /* _SC_MISC_API_H */
> --
> 2.17.1
Hi Shawn,
Care to have a look?
Daniel.
On Thu, Jan 31, 2019 at 10:16 AM Aisheng Dong <[email protected]> wrote:
>
> > -----Original Message-----
> > From: Daniel Baluta
> > Sent: Wednesday, January 30, 2019 9:30 PM
> > To: [email protected]
> > Cc: [email protected]; [email protected]; [email protected];
> > dl-linux-imx <[email protected]>; [email protected]; Aisheng Dong
> > <[email protected]>; [email protected];
> > [email protected]; S.j. Wang <[email protected]>; Daniel
> > Baluta <[email protected]>
> > Subject: [PATCH v3] firmware: imx: Add support to start/stop a CPU
> >
> > This is done via RPC call to SCU.
> >
> > Signed-off-by: Daniel Baluta <[email protected]>
>
> Reviewed-by: Dong Aisheng <[email protected]>
>
> Regards
> Dong Aisheng
>
> > ---
> > Changes since v2: (as per Aisheng's review)
> > - rename address with phys_address
> > - remove unnecessary uint8_t cast
> > - use 'true' as last parameter of imx_scu_call_rpc to actually
> > wait for a response from SCU.
> >
> > drivers/firmware/imx/misc.c | 38
> > +++++++++++++++++++++++++++
> > include/linux/firmware/imx/svc/misc.h | 3 +++
> > 2 files changed, 41 insertions(+)
> >
> > diff --git a/drivers/firmware/imx/misc.c b/drivers/firmware/imx/misc.c index
> > 97f5424dbac9..4b56a587dacd 100644
> > --- a/drivers/firmware/imx/misc.c
> > +++ b/drivers/firmware/imx/misc.c
> > @@ -18,6 +18,14 @@ struct imx_sc_msg_req_misc_set_ctrl {
> > u16 resource;
> > } __packed;
> >
> > +struct imx_sc_msg_req_cpu_start {
> > + struct imx_sc_rpc_msg hdr;
> > + u32 address_hi;
> > + u32 address_lo;
> > + u16 resource;
> > + u8 enable;
> > +} __packed;
> > +
> > struct imx_sc_msg_req_misc_get_ctrl {
> > struct imx_sc_rpc_msg hdr;
> > u32 ctrl;
> > @@ -97,3 +105,33 @@ int imx_sc_misc_get_control(struct imx_sc_ipc *ipc,
> > u32 resource,
> > return 0;
> > }
> > EXPORT_SYMBOL(imx_sc_misc_get_control);
> > +
> > +/*
> > + * This function starts/stops a CPU identified by @resource
> > + *
> > + * @param[in] ipc IPC handle
> > + * @param[in] resource resource the control is associated with
> > + * @param[in] enable true for start, false for stop
> > + * @param[in] phys_addr initial instruction address to be executed
> > + *
> > + * @return Returns 0 for success and < 0 for errors.
> > + */
> > +int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
> > + bool enable, u64 phys_addr)
> > +{
> > + struct imx_sc_msg_req_cpu_start msg;
> > + struct imx_sc_rpc_msg *hdr = &msg.hdr;
> > +
> > + hdr->ver = IMX_SC_RPC_VERSION;
> > + hdr->svc = IMX_SC_RPC_SVC_PM;
> > + hdr->func = IMX_SC_PM_FUNC_CPU_START;
> > + hdr->size = 4;
> > +
> > + msg.address_hi = phys_addr >> 32;
> > + msg.address_lo = phys_addr;
> > + msg.resource = resource;
> > + msg.enable = enable;
> > +
> > + return imx_scu_call_rpc(ipc, &msg, true); }
> > +EXPORT_SYMBOL(imx_sc_pm_cpu_start);
> > diff --git a/include/linux/firmware/imx/svc/misc.h
> > b/include/linux/firmware/imx/svc/misc.h
> > index e21c49aba92f..031dd4d3c766 100644
> > --- a/include/linux/firmware/imx/svc/misc.h
> > +++ b/include/linux/firmware/imx/svc/misc.h
> > @@ -52,4 +52,7 @@ int imx_sc_misc_set_control(struct imx_sc_ipc *ipc, u32
> > resource, int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32 resource,
> > u8 ctrl, u32 *val);
> >
> > +int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
> > + bool enable, u64 phys_addr);
> > +
> > #endif /* _SC_MISC_API_H */
> > --
> > 2.17.1
>
On Wed, Jan 30, 2019 at 01:30:22PM +0000, Daniel Baluta wrote:
> This is done via RPC call to SCU.
>
> Signed-off-by: Daniel Baluta <[email protected]>
Applied, thanks.