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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2019 ASPEED Technology Inc.
#include <linux/clk.h>
#include <linux/irq.h>
#include <linux/irqchip.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/io.h>
#include <linux/reset.h>
#include <linux/delay.h>
#define ASPEED_I3CG_CTRL(x) (0x10 + (x*0x10))
#define ASPEED_I3CG_SET(x) (0x14 + (x*0x10))
struct aspeed_i3c_global {
void __iomem *base;
struct reset_control *rst;
};
static int aspeed_i3c_global_probe(struct platform_device *pdev)
{
struct aspeed_i3c_global *i3c_global;
struct device_node *node = pdev->dev.of_node;
int i = 0;
i3c_global = kzalloc(sizeof(*i3c_global), GFP_KERNEL);
if (!i3c_global)
return -ENOMEM;
i3c_global->base = of_iomap(node, 0);
if (!i3c_global->base) {
return -ENOMEM;
}
i3c_global->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
if (IS_ERR(i3c_global->rst)) {
if (PTR_ERR(i3c_global->rst) != -EPROBE_DEFER)
dev_err(&pdev->dev, "missing or invalid reset controller device tree entry\n");
return PTR_ERR(i3c_global->rst);
}
reset_control_assert(i3c_global->rst);
udelay(3);
reset_control_deassert(i3c_global->rst);
/* init */
for(i = 0; i < 5; i++)
writel(0x000474c4, i3c_global->base + ASPEED_I3CG_SET(i));
return 0;
}
static const struct of_device_id aspeed_i3c_of_match[] = {
{ .compatible = "aspeed,ast2600-i3c-global", },
{ },
};
MODULE_DEVICE_TABLE(of, aspeed_i3c_of_match);
static struct platform_driver aspeed_i3c_driver = {
.probe = aspeed_i3c_global_probe,
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = aspeed_i3c_of_match,
},
};
module_platform_driver(aspeed_i3c_driver);
MODULE_AUTHOR("Ryan Chen");
MODULE_DESCRIPTION("ASPEED I3C Global Driver");
MODULE_LICENSE("GPL v2");
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