tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
firmware: imx: Add support to start/stop a CPU
This is done via RPC call to SCU.
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
authored by
Daniel Baluta
and committed by
Shawn Guo
d90bf296
9b0bb073
+41
+38
drivers/firmware/imx/misc.c
+38
drivers/firmware/imx/misc.c
···
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u16 resource;
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} __packed;
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struct imx_sc_msg_req_cpu_start {
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struct imx_sc_rpc_msg hdr;
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u32 address_hi;
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u32 address_lo;
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u16 resource;
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u8 enable;
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} __packed;
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struct imx_sc_msg_req_misc_get_ctrl {
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struct imx_sc_rpc_msg hdr;
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u32 ctrl;
···
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return 0;
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}
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EXPORT_SYMBOL(imx_sc_misc_get_control);
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/*
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* This function starts/stops a CPU identified by @resource
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*
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* @param[in] ipc IPC handle
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* @param[in] resource resource the control is associated with
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* @param[in] enable true for start, false for stop
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* @param[in] phys_addr initial instruction address to be executed
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*
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* @return Returns 0 for success and < 0 for errors.
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*/
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int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
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bool enable, u64 phys_addr)
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{
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struct imx_sc_msg_req_cpu_start msg;
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struct imx_sc_rpc_msg *hdr = &msg.hdr;
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hdr->ver = IMX_SC_RPC_VERSION;
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hdr->svc = IMX_SC_RPC_SVC_PM;
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hdr->func = IMX_SC_PM_FUNC_CPU_START;
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hdr->size = 4;
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msg.address_hi = phys_addr >> 32;
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msg.address_lo = phys_addr;
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msg.resource = resource;
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msg.enable = enable;
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return imx_scu_call_rpc(ipc, &msg, true);
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}
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EXPORT_SYMBOL(imx_sc_pm_cpu_start);