1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
From dbe94a8daaa63ef81b7414f2a17bca8e36dd6daa Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jogo@openwrt.org>
Date: Fri, 20 Feb 2015 19:55:32 +0100
Subject: [PATCH 1/6] gpio: add a simple GPIO driver for bcm63xx
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
---
drivers/gpio/Kconfig | 8 +++
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-bcm63xx.c | 117 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 126 insertions(+)
create mode 100644 drivers/gpio/gpio-bcm63xx.c
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -821,6 +821,14 @@ config GPIO_BCM_KONA
help
Turn on GPIO support for Broadcom "Kona" chips.
+config GPIO_BCM63XX
+ bool "Broadcom BCM63XX GPIO"
+ depends on MIPS || COMPILE_TEST
+ select GPIO_GENERIC
+ help
+ Turn on GPIO support for Broadcom BCM63XX xDSL chips.
+
+
comment "USB GPIO expanders:"
config GPIO_VIPERBOARD
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_GPIO_ADP5588) += gpio-adp55
obj-$(CONFIG_GPIO_AMD8111) += gpio-amd8111.o
obj-$(CONFIG_GPIO_ARIZONA) += gpio-arizona.o
obj-$(CONFIG_GPIO_BCM_KONA) += gpio-bcm-kona.o
+obj-$(CONFIG_GPIO_BCM63XX) += gpio-bcm63xx.o
obj-$(CONFIG_GPIO_BT8XX) += gpio-bt8xx.o
obj-$(CONFIG_GPIO_CLPS711X) += gpio-clps711x.o
obj-$(CONFIG_GPIO_CS5535) += gpio-cs5535.o
--- /dev/null
+++ b/drivers/gpio/gpio-bcm63xx.c
@@ -0,0 +1,117 @@
+/*
+ * Driver for BCM63XX memory-mapped GPIO controllers, based on
+ * Generic driver for memory-mapped GPIO controllers.
+ *
+ * Copyright 2008 MontaVista Software, Inc.
+ * Copyright 2008,2010 Anton Vorontsov <cbouatmailru@gmail.com>
+ * Copyright 2015 Jonas Gorski <jogo@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/bug.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/compiler.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/log2.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/basic_mmio_gpio.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+
+static int bcm63xx_gpio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct resource *dat_r, *dirout_r;
+ void __iomem *dat;
+ void __iomem *dirout;
+ unsigned long sz;
+ int err;
+ struct bgpio_chip *bgc;
+ struct bgpio_pdata *pdata = dev_get_platdata(dev);
+
+ dat_r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ dirout_r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!dat_r || !dirout_r)
+ return -EINVAL;
+
+ if (resource_size(dat_r) != resource_size(dirout_r))
+ return -EINVAL;
+
+ sz = resource_size(dat_r);
+
+ dat = devm_ioremap_resource(dev, dat_r);
+ if (IS_ERR(dat))
+ return PTR_ERR(dat);
+
+ dirout = devm_ioremap_resource(dev, dirout_r);
+ if (IS_ERR(dirout))
+ return PTR_ERR(dirout);
+
+ bgc = devm_kzalloc(&pdev->dev, sizeof(*bgc), GFP_KERNEL);
+ if (!bgc)
+ return -ENOMEM;
+
+ err = bgpio_init(bgc, dev, sz, dat, NULL, NULL, dirout, NULL,
+ BGPIOF_BIG_ENDIAN_BYTE_ORDER);
+ if (err)
+ return err;
+
+ platform_set_drvdata(pdev, bgc);
+
+ if (dev->of_node) {
+ u32 ngpios;
+
+ if (!of_property_read_u32(dev->of_node, "ngpios", &ngpios))
+ bgc->gc.ngpio = ngpios;
+
+ } else if (pdata) {
+ bgc->gc.base = pdata->base;
+ if (pdata->ngpio > 0)
+ bgc->gc.ngpio = pdata->ngpio;
+ }
+
+ return gpiochip_add(&bgc->gc);
+}
+
+static int bcm63xx_gpio_remove(struct platform_device *pdev)
+{
+ struct bgpio_chip *bgc = platform_get_drvdata(pdev);
+
+ return bgpio_remove(bgc);
+}
+
+#ifdef CONFIG_OF
+static struct of_device_id bcm63xx_gpio_of_match[] = {
+ { .compatible = "brcm,bcm6345-gpio" },
+ { },
+};
+#endif
+
+static struct platform_driver bcm63xx_gpio_driver = {
+ .probe = bcm63xx_gpio_probe,
+ .remove = bcm63xx_gpio_remove,
+ .driver = {
+ .name = "bcm63xx-gpio",
+ .of_match_table = of_match_ptr(bcm63xx_gpio_of_match),
+ },
+};
+
+module_platform_driver(bcm63xx_gpio_driver);
+
+MODULE_DESCRIPTION("Driver for BCM63XX memory-mapped GPIO controllers");
+MODULE_AUTHOR("Jonas Gorski <jogo@openwrt.org>");
+MODULE_LICENSE("GPL");
|
