qcom_wcnss_iris.c
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/*
* Qualcomm Wireless Connectivity Subsystem Iris driver
*
* Copyright (C) 2016 Linaro Ltd
* Copyright (C) 2014 Sony Mobile Communications AB
* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/clk.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include "qcom_wcnss.h"
struct qcom_iris {
struct device *dev;
struct clk *xo_clk;
struct regulator_bulk_data *vregs;
size_t num_vregs;
};
struct iris_data {
const struct wcnss_vreg_info *vregs;
size_t num_vregs;
bool use_48mhz_xo;
};
static const struct iris_data wcn3620_data = {
.vregs = (struct wcnss_vreg_info[]) {
{ "vddxo", 1800000, 1800000, 10000 },
{ "vddrfa", 1300000, 1300000, 100000 },
{ "vddpa", 3300000, 3300000, 515000 },
{ "vdddig", 1800000, 1800000, 10000 },
},
.num_vregs = 4,
.use_48mhz_xo = false,
};
static const struct iris_data wcn3660_data = {
.vregs = (struct wcnss_vreg_info[]) {
{ "vddxo", 1800000, 1800000, 10000 },
{ "vddrfa", 1300000, 1300000, 100000 },
{ "vddpa", 2900000, 3000000, 515000 },
{ "vdddig", 1200000, 1225000, 10000 },
},
.num_vregs = 4,
.use_48mhz_xo = true,
};
static const struct iris_data wcn3680_data = {
.vregs = (struct wcnss_vreg_info[]) {
{ "vddxo", 1800000, 1800000, 10000 },
{ "vddrfa", 1300000, 1300000, 100000 },
{ "vddpa", 3300000, 3300000, 515000 },
{ "vdddig", 1800000, 1800000, 10000 },
},
.num_vregs = 4,
.use_48mhz_xo = true,
};
int qcom_iris_enable(struct qcom_iris *iris)
{
int ret;
ret = regulator_bulk_enable(iris->num_vregs, iris->vregs);
if (ret)
return ret;
ret = clk_prepare_enable(iris->xo_clk);
if (ret) {
dev_err(iris->dev, "failed to enable xo clk\n");
goto disable_regulators;
}
return 0;
disable_regulators:
regulator_bulk_disable(iris->num_vregs, iris->vregs);
return ret;
}
void qcom_iris_disable(struct qcom_iris *iris)
{
clk_disable_unprepare(iris->xo_clk);
regulator_bulk_disable(iris->num_vregs, iris->vregs);
}
static int qcom_iris_probe(struct platform_device *pdev)
{
const struct iris_data *data;
struct qcom_wcnss *wcnss;
struct qcom_iris *iris;
int ret;
int i;
iris = devm_kzalloc(&pdev->dev, sizeof(struct qcom_iris), GFP_KERNEL);
if (!iris)
return -ENOMEM;
data = of_device_get_match_data(&pdev->dev);
wcnss = dev_get_drvdata(pdev->dev.parent);
iris->xo_clk = devm_clk_get(&pdev->dev, "xo");
if (IS_ERR(iris->xo_clk)) {
if (PTR_ERR(iris->xo_clk) != -EPROBE_DEFER)
dev_err(&pdev->dev, "failed to acquire xo clk\n");
return PTR_ERR(iris->xo_clk);
}
iris->num_vregs = data->num_vregs;
iris->vregs = devm_kcalloc(&pdev->dev,
iris->num_vregs,
sizeof(struct regulator_bulk_data),
GFP_KERNEL);
if (!iris->vregs)
return -ENOMEM;
for (i = 0; i < iris->num_vregs; i++)
iris->vregs[i].supply = data->vregs[i].name;
ret = devm_regulator_bulk_get(&pdev->dev, iris->num_vregs, iris->vregs);
if (ret) {
dev_err(&pdev->dev, "failed to get regulators\n");
return ret;
}
for (i = 0; i < iris->num_vregs; i++) {
if (data->vregs[i].max_voltage)
regulator_set_voltage(iris->vregs[i].consumer,
data->vregs[i].min_voltage,
data->vregs[i].max_voltage);
if (data->vregs[i].load_uA)
regulator_set_load(iris->vregs[i].consumer,
data->vregs[i].load_uA);
}
qcom_wcnss_assign_iris(wcnss, iris, data->use_48mhz_xo);
return 0;
}
static int qcom_iris_remove(struct platform_device *pdev)
{
struct qcom_wcnss *wcnss = dev_get_drvdata(pdev->dev.parent);
qcom_wcnss_assign_iris(wcnss, NULL, false);
return 0;
}
static const struct of_device_id iris_of_match[] = {
{ .compatible = "qcom,wcn3620", .data = &wcn3620_data },
{ .compatible = "qcom,wcn3660", .data = &wcn3660_data },
{ .compatible = "qcom,wcn3680", .data = &wcn3680_data },
{}
};
struct platform_driver qcom_iris_driver = {
.probe = qcom_iris_probe,
.remove = qcom_iris_remove,
.driver = {
.name = "qcom-iris",
.of_match_table = iris_of_match,
},
};