mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
77 lines
1.7 KiB
77 lines
1.7 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* RPM over SMD communication wrapper for interconnects |
|
* |
|
* Copyright (C) 2019 Linaro Ltd |
|
* Author: Georgi Djakov <[email protected]> |
|
*/ |
|
|
|
#include <linux/interconnect-provider.h> |
|
#include <linux/module.h> |
|
#include <linux/of.h> |
|
#include <linux/of_platform.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/soc/qcom/smd-rpm.h> |
|
|
|
#include "smd-rpm.h" |
|
|
|
#define RPM_KEY_BW 0x00007762 |
|
|
|
static struct qcom_smd_rpm *icc_smd_rpm; |
|
|
|
struct icc_rpm_smd_req { |
|
__le32 key; |
|
__le32 nbytes; |
|
__le32 value; |
|
}; |
|
|
|
bool qcom_icc_rpm_smd_available(void) |
|
{ |
|
return !!icc_smd_rpm; |
|
} |
|
EXPORT_SYMBOL_GPL(qcom_icc_rpm_smd_available); |
|
|
|
int qcom_icc_rpm_smd_send(int ctx, int rsc_type, int id, u32 val) |
|
{ |
|
struct icc_rpm_smd_req req = { |
|
.key = cpu_to_le32(RPM_KEY_BW), |
|
.nbytes = cpu_to_le32(sizeof(u32)), |
|
.value = cpu_to_le32(val), |
|
}; |
|
|
|
return qcom_rpm_smd_write(icc_smd_rpm, ctx, rsc_type, id, &req, |
|
sizeof(req)); |
|
} |
|
EXPORT_SYMBOL_GPL(qcom_icc_rpm_smd_send); |
|
|
|
static int qcom_icc_rpm_smd_remove(struct platform_device *pdev) |
|
{ |
|
icc_smd_rpm = NULL; |
|
|
|
return 0; |
|
} |
|
|
|
static int qcom_icc_rpm_smd_probe(struct platform_device *pdev) |
|
{ |
|
icc_smd_rpm = dev_get_drvdata(pdev->dev.parent); |
|
|
|
if (!icc_smd_rpm) { |
|
dev_err(&pdev->dev, "unable to retrieve handle to RPM\n"); |
|
return -ENODEV; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver qcom_interconnect_rpm_smd_driver = { |
|
.driver = { |
|
.name = "icc_smd_rpm", |
|
}, |
|
.probe = qcom_icc_rpm_smd_probe, |
|
.remove = qcom_icc_rpm_smd_remove, |
|
}; |
|
module_platform_driver(qcom_interconnect_rpm_smd_driver); |
|
MODULE_AUTHOR("Georgi Djakov <[email protected]>"); |
|
MODULE_DESCRIPTION("Qualcomm SMD RPM interconnect proxy driver"); |
|
MODULE_LICENSE("GPL v2"); |
|
MODULE_ALIAS("platform:icc_smd_rpm");
|
|
|