This source file includes following definitions.
- bcm2835_aux_clk_probe
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6 #include <linux/clk.h>
7 #include <linux/clk-provider.h>
8 #include <linux/io.h>
9 #include <linux/module.h>
10 #include <linux/platform_device.h>
11 #include <dt-bindings/clock/bcm2835-aux.h>
12
13 #define BCM2835_AUXIRQ 0x00
14 #define BCM2835_AUXENB 0x04
15
16 static int bcm2835_aux_clk_probe(struct platform_device *pdev)
17 {
18 struct device *dev = &pdev->dev;
19 struct clk_hw_onecell_data *onecell;
20 const char *parent;
21 struct clk *parent_clk;
22 struct resource *res;
23 void __iomem *reg, *gate;
24
25 parent_clk = devm_clk_get(dev, NULL);
26 if (IS_ERR(parent_clk))
27 return PTR_ERR(parent_clk);
28 parent = __clk_get_name(parent_clk);
29
30 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
31 reg = devm_ioremap_resource(dev, res);
32 if (IS_ERR(reg))
33 return PTR_ERR(reg);
34
35 onecell = devm_kmalloc(dev,
36 struct_size(onecell, hws,
37 BCM2835_AUX_CLOCK_COUNT),
38 GFP_KERNEL);
39 if (!onecell)
40 return -ENOMEM;
41 onecell->num = BCM2835_AUX_CLOCK_COUNT;
42
43 gate = reg + BCM2835_AUXENB;
44 onecell->hws[BCM2835_AUX_CLOCK_UART] =
45 clk_hw_register_gate(dev, "aux_uart", parent, 0, gate, 0, 0, NULL);
46
47 onecell->hws[BCM2835_AUX_CLOCK_SPI1] =
48 clk_hw_register_gate(dev, "aux_spi1", parent, 0, gate, 1, 0, NULL);
49
50 onecell->hws[BCM2835_AUX_CLOCK_SPI2] =
51 clk_hw_register_gate(dev, "aux_spi2", parent, 0, gate, 2, 0, NULL);
52
53 return of_clk_add_hw_provider(pdev->dev.of_node, of_clk_hw_onecell_get,
54 onecell);
55 }
56
57 static const struct of_device_id bcm2835_aux_clk_of_match[] = {
58 { .compatible = "brcm,bcm2835-aux", },
59 {},
60 };
61 MODULE_DEVICE_TABLE(of, bcm2835_aux_clk_of_match);
62
63 static struct platform_driver bcm2835_aux_clk_driver = {
64 .driver = {
65 .name = "bcm2835-aux-clk",
66 .of_match_table = bcm2835_aux_clk_of_match,
67 },
68 .probe = bcm2835_aux_clk_probe,
69 };
70 builtin_platform_driver(bcm2835_aux_clk_driver);
71
72 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
73 MODULE_DESCRIPTION("BCM2835 auxiliary peripheral clock driver");
74 MODULE_LICENSE("GPL");