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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Broadcom
*/
#include <linux/clk.h>
#include <io.h>
#include <of_address.h>
#include <driver.h>
#include <init.h>
#include <dt-bindings/clock/bcm2835-aux.h>
#define BCM2835_AUXIRQ 0x00
#define BCM2835_AUXENB 0x04
static int bcm2835_aux_clk_probe(struct device_d *dev)
{
struct clk_hw_onecell_data *onecell;
const char *parent;
struct clk *parent_clk;
void __iomem *reg, *gate;
parent_clk = clk_get(dev, NULL);
if (IS_ERR(parent_clk))
return PTR_ERR(parent_clk);
parent = __clk_get_name(parent_clk);
reg = of_iomap(dev->of_node, 0);
if (!reg)
return -ENOMEM;
onecell = kmalloc(struct_size(onecell, hws, BCM2835_AUX_CLOCK_COUNT),
GFP_KERNEL);
if (!onecell)
return -ENOMEM;
onecell->num = BCM2835_AUX_CLOCK_COUNT;
gate = reg + BCM2835_AUXENB;
onecell->hws[BCM2835_AUX_CLOCK_UART] =
clk_hw_register_gate(dev, "aux_uart", parent, 0, gate, 0, 0, NULL);
onecell->hws[BCM2835_AUX_CLOCK_SPI1] =
clk_hw_register_gate(dev, "aux_spi1", parent, 0, gate, 1, 0, NULL);
onecell->hws[BCM2835_AUX_CLOCK_SPI2] =
clk_hw_register_gate(dev, "aux_spi2", parent, 0, gate, 2, 0, NULL);
return of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
onecell);
}
static const struct of_device_id bcm2835_aux_clk_of_match[] = {
{ .compatible = "brcm,bcm2835-aux", },
{},
};
static struct driver_d bcm2835_aux_clk_driver = {
.name = "bcm2835-aux-clk",
.of_compatible = bcm2835_aux_clk_of_match,
.probe = bcm2835_aux_clk_probe,
};
core_platform_driver(bcm2835_aux_clk_driver);
MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
MODULE_DESCRIPTION("BCM2835 auxiliary peripheral clock driver");
MODULE_LICENSE("GPL");
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