clk-pxa1908-apbcp.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2#include <linux/clk-provider.h>
 3#include <linux/module.h>
 4#include <linux/platform_device.h>
 5#include <linux/spinlock.h>
 6
 7#include <dt-bindings/clock/marvell,pxa1908.h>
 8
 9#include "clk.h"
10
11#define APBCP_UART2		0x1c
12#define APBCP_TWSI2		0x28
13#define APBCP_AICER		0x38
14
15#define APBCP_NR_CLKS		4
16
17struct pxa1908_clk_unit {
18	struct mmp_clk_unit unit;
19	void __iomem *base;
20};
21
22static DEFINE_SPINLOCK(uart2_lock);
23
24static const char * const uart_parent_names[] = {"pll1_117", "uart_pll"};
25
26static struct mmp_param_gate_clk apbcp_gate_clks[] = {
27	{PXA1908_CLK_UART2, "uart2_clk", "uart2_mux", CLK_SET_RATE_PARENT, APBCP_UART2, 0x7, 0x3, 0x0, 0, &uart2_lock},
28	{PXA1908_CLK_TWSI2, "twsi2_clk", "pll1_32", CLK_SET_RATE_PARENT, APBCP_TWSI2, 0x7, 0x3, 0x0, 0, NULL},
29	{PXA1908_CLK_AICER, "ripc_clk", NULL, 0, APBCP_AICER, 0x7, 0x2, 0x0, 0, NULL},
30};
31
32static struct mmp_param_mux_clk apbcp_mux_clks[] = {
33	{0, "uart2_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBCP_UART2, 4, 3, 0, &uart2_lock},
34};
35
36static void pxa1908_apb_p_periph_clk_init(struct pxa1908_clk_unit *pxa_unit)
37{
38	struct mmp_clk_unit *unit = &pxa_unit->unit;
39
40	mmp_register_mux_clks(unit, apbcp_mux_clks, pxa_unit->base,
41			ARRAY_SIZE(apbcp_mux_clks));
42	mmp_register_gate_clks(unit, apbcp_gate_clks, pxa_unit->base,
43			ARRAY_SIZE(apbcp_gate_clks));
44}
45
46static int pxa1908_apbcp_probe(struct platform_device *pdev)
47{
48	struct pxa1908_clk_unit *pxa_unit;
49
50	pxa_unit = devm_kzalloc(&pdev->dev, sizeof(*pxa_unit), GFP_KERNEL);
51	if (!pxa_unit)
52		return -ENOMEM;
53
54	pxa_unit->base = devm_platform_ioremap_resource(pdev, 0);
55	if (IS_ERR(pxa_unit->base))
56		return PTR_ERR(pxa_unit->base);
57
58	mmp_clk_init(pdev->dev.of_node, &pxa_unit->unit, APBCP_NR_CLKS);
59
60	pxa1908_apb_p_periph_clk_init(pxa_unit);
61
62	return 0;
63}
64
65static const struct of_device_id pxa1908_apbcp_match_table[] = {
66	{ .compatible = "marvell,pxa1908-apbcp" },
67	{ }
68};
69MODULE_DEVICE_TABLE(of, pxa1908_apbcp_match_table);
70
71static struct platform_driver pxa1908_apbcp_driver = {
72	.probe = pxa1908_apbcp_probe,
73	.driver = {
74		.name = "pxa1908-apbcp",
75		.of_match_table = pxa1908_apbcp_match_table
76	}
77};
78module_platform_driver(pxa1908_apbcp_driver);
79
80MODULE_AUTHOR("Duje Mihanović <duje.mihanovic@skole.hr>");
81MODULE_DESCRIPTION("Marvell PXA1908 APBCP Clock Driver");
82MODULE_LICENSE("GPL");