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https://github.com/physwizz/a155-U-u1.git
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53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020 MediaTek Inc.
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*/
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#if IS_ENABLED(CONFIG_MTK_TINYSYS_SCP_DEBUG_SUPPORT)
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#include <linux/device.h> /* needed by device_* */
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#include "scp_ipi_pin.h"
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#include "scp_mbox_layout.h"
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#include "scp_scpctl.h"
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/*
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* A device node to send commands to scp wit unified interface
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* @magic: should be 666
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* @type: a class for different types of commands
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* @op: the operation specified in a command type
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* @return: 0 if success, -EINVAL if wrong value of number
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* of parameters
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*/
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static ssize_t scpctl_store(struct device *kobj
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, struct device_attribute *attr, const char *buf, size_t n)
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{
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int ret;
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int magic, type, op;
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struct scpctl_cmd_s cmd;
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char *prompt = "[SCPCTL]:";
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if (sscanf(buf, "%d %d %d", &magic, &type, &op) != 3)
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return -EINVAL;
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pr_notice("%s %d %d %d\n", prompt, magic, type, op);
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if (magic != 666)
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return -EINVAL;
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cmd.type = type;
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cmd.op = op;
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ret = mtk_ipi_send(&scp_ipidev, IPI_OUT_SCPCTL_1, 0, &cmd,
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PIN_OUT_SIZE_SCPCTL_1, 0);
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if (ret != IPI_ACTION_DONE)
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goto _err;
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return n;
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_err:
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pr_notice("%s failed, %d\n", prompt, ret);
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return -EIO;
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}
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DEVICE_ATTR_WO(scpctl);
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#endif
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