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// SPDX-License-Identifier: GPL-2.0
/**
* dwc3-of-simple.c - OF glue layer for simple integrations
*
* Copyright (c) 2015 Texas Instruments Incorporated - http://www.ti.com
*
* Author: Felipe Balbi <balbi@ti.com>
*
* This is a combination of the old dwc3-qcom.c by Ivan T. Ivanov
* <iivanov@mm-sol.com> and the original patch adding support for Xilinx' SoC
* by Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@xilinx.com>
*/
#include <common.h>
#include <driver.h>
#include <errno.h>
#include <init.h>
#include <linux/clk.h>
#include <linux/reset.h>
#include <of.h>
struct dwc3_of_simple {
struct device_d *dev;
struct clk **clks;
int num_clocks;
};
static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count)
{
struct device_d *dev = simple->dev;
struct device_node *np = dev->device_node;
int i;
simple->num_clocks = count;
if (!count)
return 0;
simple->clks = xzalloc(sizeof(struct clk *));
if (!simple->clks)
return -ENOMEM;
for (i = 0; i < simple->num_clocks; i++) {
struct clk *clk;
clk = of_clk_get(np, i);
if (IS_ERR(clk)) {
while (--i >= 0) {
clk_disable(simple->clks[i]);
clk_put(simple->clks[i]);
}
return PTR_ERR(clk);
}
simple->clks[i] = clk;
}
return 0;
}
static int dwc3_of_simple_probe(struct device_d *dev)
{
struct dwc3_of_simple *simple;
struct device_node *np = dev->device_node;
int ret;
int i;
simple = xzalloc(sizeof(*simple));
if (!simple)
return -ENOMEM;
dev->priv = simple;
simple->dev = dev;
ret = dwc3_of_simple_clk_init(simple, of_count_phandle_with_args(np,
"clocks", "#clock-cells"));
if (ret)
return ret;
ret = of_platform_populate(np, NULL, dev);
if (ret) {
for (i = 0; i < simple->num_clocks; i++) {
clk_disable(simple->clks[i]);
clk_put(simple->clks[i]);
}
return ret;
}
return 0;
}
static void dwc3_of_simple_remove(struct device_d *dev)
{
struct dwc3_of_simple *simple = dev->priv;
int i;
for (i = 0; i < simple->num_clocks; i++) {
clk_disable(simple->clks[i]);
clk_put(simple->clks[i]);
}
simple->num_clocks = 0;
}
static const struct of_device_id of_dwc3_simple_match[] = {
{.compatible = "rockchip,rk3399-dwc3"},
{.compatible = "xlnx,zynqmp-dwc3"},
{.compatible = "fsl,ls1046a-dwc3"},
{.compatible = "cavium,octeon-7130-usb-uctl"},
{.compatible = "sprd,sc9860-dwc3"},
{.compatible = "amlogic,meson-axg-dwc3"},
{.compatible = "amlogic,meson-gxl-dwc3"},
{.compatible = "allwinner,sun50i-h6-dwc3"},
{/* Sentinel */}};
static struct driver_d dwc3_of_simple_driver = {
.probe = dwc3_of_simple_probe,
.remove = dwc3_of_simple_remove,
.name = "dwc3-of-simple",
.of_compatible = DRV_OF_COMPAT(of_dwc3_simple_match),
};
device_platform_driver(dwc3_of_simple_driver);
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