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15e1f2bc8b
Add SCU MISC SVC support which provides misc control get/set functions. Cc: Shawn Guo <shawnguo@kernel.org> Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016 Freescale Semiconductor, Inc.
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* Copyright 2017~2018 NXP
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* Author: Dong Aisheng <aisheng.dong@nxp.com>
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*
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* File containing client-side RPC functions for the MISC service. These
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* function are ported to clients that communicate to the SC.
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*
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*/
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#include <linux/firmware/imx/svc/misc.h>
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struct imx_sc_msg_req_misc_set_ctrl {
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struct imx_sc_rpc_msg hdr;
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u32 ctrl;
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u32 val;
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u16 resource;
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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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u16 resource;
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} __packed;
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struct imx_sc_msg_resp_misc_get_ctrl {
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struct imx_sc_rpc_msg hdr;
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u32 val;
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} __packed;
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/*
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* This function sets a miscellaneous control value.
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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] ctrl control to change
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* @param[in] val value to apply to the control
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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_misc_set_control(struct imx_sc_ipc *ipc, u32 resource,
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u8 ctrl, u32 val)
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{
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struct imx_sc_msg_req_misc_set_ctrl 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 = (uint8_t)IMX_SC_RPC_SVC_MISC;
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hdr->func = (uint8_t)IMX_SC_MISC_FUNC_SET_CONTROL;
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hdr->size = 4;
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msg.ctrl = ctrl;
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msg.val = val;
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msg.resource = resource;
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return imx_scu_call_rpc(ipc, &msg, true);
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}
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EXPORT_SYMBOL(imx_sc_misc_set_control);
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/*
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* This function gets a miscellaneous control value.
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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] ctrl control to get
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* @param[out] val pointer to return the control value
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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_misc_get_control(struct imx_sc_ipc *ipc, u32 resource,
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u8 ctrl, u32 *val)
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{
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struct imx_sc_msg_req_misc_get_ctrl msg;
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struct imx_sc_msg_resp_misc_get_ctrl *resp;
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struct imx_sc_rpc_msg *hdr = &msg.hdr;
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int ret;
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hdr->ver = IMX_SC_RPC_VERSION;
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hdr->svc = (uint8_t)IMX_SC_RPC_SVC_MISC;
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hdr->func = (uint8_t)IMX_SC_MISC_FUNC_GET_CONTROL;
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hdr->size = 3;
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msg.ctrl = ctrl;
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msg.resource = resource;
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ret = imx_scu_call_rpc(ipc, &msg, true);
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if (ret)
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return ret;
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resp = (struct imx_sc_msg_resp_misc_get_ctrl *)&msg;
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if (val != NULL)
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*val = resp->val;
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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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