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
17 struct pxa1908_clk_unit {
18 struct mmp_clk_unit unit;
19 void __iomem *base;
20 };
21
22 static DEFINE_SPINLOCK(uart2_lock);
23
24 static const char * const uart_parent_names[] = {"pll1_117", "uart_pll"};
25
26 static 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
32 static 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
pxa1908_apb_p_periph_clk_init(struct pxa1908_clk_unit * pxa_unit)36 static 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
pxa1908_apbcp_probe(struct platform_device * pdev)46 static 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
65 static const struct of_device_id pxa1908_apbcp_match_table[] = {
66 { .compatible = "marvell,pxa1908-apbcp" },
67 { }
68 };
69 MODULE_DEVICE_TABLE(of, pxa1908_apbcp_match_table);
70
71 static 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 };
78 module_platform_driver(pxa1908_apbcp_driver);
79
80 MODULE_AUTHOR("Duje Mihanović <[email protected]>");
81 MODULE_DESCRIPTION("Marvell PXA1908 APBCP Clock Driver");
82 MODULE_LICENSE("GPL");
83