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path: root/drivers/firmware/imx/misc.c
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Diffstat (limited to 'drivers/firmware/imx/misc.c')
-rw-r--r--drivers/firmware/imx/misc.c38
1 files changed, 38 insertions, 0 deletions
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);