78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* RPM over SMD communication wrapper for interconnects
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*
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* Copyright (C) 2019 Linaro Ltd
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* Author: Georgi Djakov <georgi.djakov@linaro.org>
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*/
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#include <linux/interconnect-provider.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/soc/qcom/smd-rpm.h>
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#include "smd-rpm.h"
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#define RPM_KEY_BW 0x00007762
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static struct qcom_smd_rpm *icc_smd_rpm;
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struct icc_rpm_smd_req {
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__le32 key;
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__le32 nbytes;
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__le32 value;
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};
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bool qcom_icc_rpm_smd_available(void)
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{
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return !!icc_smd_rpm;
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}
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EXPORT_SYMBOL_GPL(qcom_icc_rpm_smd_available);
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int qcom_icc_rpm_smd_send(int ctx, int rsc_type, int id, u32 val)
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{
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struct icc_rpm_smd_req req = {
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.key = cpu_to_le32(RPM_KEY_BW),
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.nbytes = cpu_to_le32(sizeof(u32)),
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.value = cpu_to_le32(val),
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};
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return qcom_rpm_smd_write(icc_smd_rpm, ctx, rsc_type, id, &req,
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sizeof(req));
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}
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EXPORT_SYMBOL_GPL(qcom_icc_rpm_smd_send);
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static int qcom_icc_rpm_smd_remove(struct platform_device *pdev)
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{
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icc_smd_rpm = NULL;
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return 0;
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}
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static int qcom_icc_rpm_smd_probe(struct platform_device *pdev)
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{
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icc_smd_rpm = dev_get_drvdata(pdev->dev.parent);
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if (!icc_smd_rpm) {
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dev_err(&pdev->dev, "unable to retrieve handle to RPM\n");
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return -ENODEV;
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}
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return 0;
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}
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static struct platform_driver qcom_interconnect_rpm_smd_driver = {
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.driver = {
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.name = "icc_smd_rpm",
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},
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.probe = qcom_icc_rpm_smd_probe,
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.remove = qcom_icc_rpm_smd_remove,
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};
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module_platform_driver(qcom_interconnect_rpm_smd_driver);
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MODULE_AUTHOR("Georgi Djakov <georgi.djakov@linaro.org>");
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MODULE_DESCRIPTION("Qualcomm SMD RPM interconnect proxy driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:icc_smd_rpm");
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