Root/target/linux/rdc/patches-2.6.32/001-rdc321x_mfd_southbridge.patch

1This patch adds a new MFD driver for the RDC321x southbridge. This southbridge
2is always present in the RDC321x System-on-a-Chip and provides access to some
3GPIOs as well as a watchdog. Access to these two functions is done using the
4southbridge PCI device configuration space.
5
6Signed-off-by: Florian Fainelli <florian@openwrt.org>
7---
8Changes from v2:
9- pass the pci_dev pointer to MFD cell drivers as platform_data
10- remove the printk(KERN_ERR and use dev_err instead
11- removed pci_dev accessors
12- use DEFINE_PCI_DEVICE_TABLE
13
14--- a/drivers/mfd/Kconfig
15+++ b/drivers/mfd/Kconfig
16@@ -305,6 +305,15 @@ config EZX_PCAP
17       This enables the PCAP ASIC present on EZX Phones. This is
18       needed for MMC, TouchScreen, Sound, USB, etc..
19 
20+config MFD_RDC321X
21+ tristate "Support for RDC-R321x southbridge"
22+ select MFD_CORE
23+ depends on PCI
24+ help
25+ Say yes here if you want to have support for the RDC R-321x SoC
26+ southbridge which provides access to GPIOs and Watchdog using the
27+ southbridge PCI device configuration space.
28+
29 endmenu
30 
31 menu "Multimedia Capabilities Port drivers"
32--- a/drivers/mfd/Makefile
33+++ b/drivers/mfd/Makefile
34@@ -50,3 +50,5 @@ obj-$(CONFIG_PCF50633_ADC) += pcf50633-a
35 obj-$(CONFIG_PCF50633_GPIO) += pcf50633-gpio.o
36 obj-$(CONFIG_AB3100_CORE) += ab3100-core.o
37 obj-$(CONFIG_AB3100_OTP) += ab3100-otp.o
38+
39+obj-$(CONFIG_MFD_RDC321X) += rdc321x-southbridge.o
40--- /dev/null
41+++ b/drivers/mfd/rdc321x-southbridge.c
42@@ -0,0 +1,123 @@
43+/*
44+ * RDC321x MFD southbrige driver
45+ *
46+ * Copyright (C) 2007-2010 Florian Fainelli <florian@openwrt.org>
47+ * Copyright (C) 2010 Bernhard Loos <bernhardloos@googlemail.com>
48+ *
49+ * This program is free software; you can redistribute it and/or modify
50+ * it under the terms of the GNU General Public License as published by
51+ * the Free Software Foundation; either version 2 of the License, or
52+ * (at your option) any later version.
53+ *
54+ * This program is distributed in the hope that it will be useful,
55+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
56+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
57+ * GNU General Public License for more details.
58+ *
59+ * You should have received a copy of the GNU General Public License
60+ * along with this program; if not, write to the Free Software
61+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
62+ *
63+ */
64+#include <linux/init.h>
65+#include <linux/module.h>
66+#include <linux/kernel.h>
67+#include <linux/platform_device.h>
68+#include <linux/pci.h>
69+#include <linux/mfd/core.h>
70+#include <linux/mfd/rdc321x.h>
71+
72+static struct rdc321x_wdt_pdata rdc321x_wdt_pdata;
73+
74+static struct resource rdc321x_wdt_resource[] = {
75+ {
76+ .name = "wdt-reg",
77+ .start = RDC321X_WDT_CTRL,
78+ .end = RDC321X_WDT_CTRL + 0x3,
79+ .flags = IORESOURCE_IO,
80+ }
81+};
82+
83+static struct rdc321x_gpio_pdata rdc321x_gpio_pdata = {
84+ .max_gpios = RDC321X_MAX_GPIO,
85+};
86+
87+static struct resource rdc321x_gpio_resources[] = {
88+ {
89+ .name = "gpio-reg1",
90+ .start = RDC321X_GPIO_CTRL_REG1,
91+ .end = RDC321X_GPIO_CTRL_REG1 + 0x7,
92+ .flags = IORESOURCE_IO,
93+ }, {
94+ .name = "gpio-reg2",
95+ .start = RDC321X_GPIO_CTRL_REG2,
96+ .end = RDC321X_GPIO_CTRL_REG2 + 0x7,
97+ .flags = IORESOURCE_IO,
98+ }
99+};
100+
101+static struct mfd_cell rdc321x_sb_cells[] = {
102+ {
103+ .name = "rdc321x-wdt",
104+ .resources = rdc321x_wdt_resource,
105+ .num_resources = ARRAY_SIZE(rdc321x_wdt_resource),
106+ .driver_data = &rdc321x_wdt_pdata,
107+ }, {
108+ .name = "rdc321x-gpio",
109+ .resources = rdc321x_gpio_resources,
110+ .num_resources = ARRAY_SIZE(rdc321x_gpio_resources),
111+ .driver_data = &rdc321x_gpio_pdata,
112+ },
113+};
114+
115+static int __devinit rdc321x_sb_probe(struct pci_dev *pdev,
116+ const struct pci_device_id *ent)
117+{
118+ int err;
119+
120+ err = pci_enable_device(pdev);
121+ if (err) {
122+ dev_err(&pdev->dev, "failed to enable device\n");
123+ return err;
124+ }
125+
126+ rdc321x_gpio_pdata.sb_pdev = pdev;
127+ rdc321x_wdt_pdata.sb_pdev = pdev;
128+
129+ return mfd_add_devices(&pdev->dev, -1,
130+ rdc321x_sb_cells, ARRAY_SIZE(rdc321x_sb_cells), NULL, 0);
131+}
132+
133+static void __devexit rdc321x_sb_remove(struct pci_dev *pdev)
134+{
135+ mfd_remove_devices(&pdev->dev);
136+}
137+
138+static DEFINE_PCI_DEVICE_TABLE(rdc321x_sb_table) = {
139+ { PCI_DEVICE(PCI_VENDOR_ID_RDC, PCI_DEVICE_ID_RDC_R6030) },
140+ {}
141+};
142+
143+static struct pci_driver rdc321x_sb_driver = {
144+ .name = "RDC321x Southbridge",
145+ .id_table = rdc321x_sb_table,
146+ .probe = rdc321x_sb_probe,
147+ .remove = __devexit_p(rdc321x_sb_remove),
148+};
149+
150+static int __init rdc321x_sb_init(void)
151+{
152+ return pci_register_driver(&rdc321x_sb_driver);
153+}
154+
155+static void __exit rdc321x_sb_exit(void)
156+{
157+ pci_unregister_driver(&rdc321x_sb_driver);
158+}
159+
160+module_init(rdc321x_sb_init);
161+module_exit(rdc321x_sb_exit);
162+
163+MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
164+MODULE_LICENSE("GPL");
165+MODULE_DESCRIPTION("RDC R-321x MFD southbridge driver");
166--- /dev/null
167+++ b/include/linux/mfd/rdc321x.h
168@@ -0,0 +1,26 @@
169+#ifndef __RDC321X_MFD_H
170+#define __RDC321X_MFD_H
171+
172+#include <linux/types.h>
173+#include <linux/pci.h>
174+
175+/* Offsets to be accessed in the southbridge PCI
176+ * device configuration register */
177+#define RDC321X_WDT_CTRL 0x44
178+#define RDC321X_GPIO_CTRL_REG1 0x48
179+#define RDC321X_GPIO_DATA_REG1 0x4c
180+#define RDC321X_GPIO_CTRL_REG2 0x84
181+#define RDC321X_GPIO_DATA_REG2 0x88
182+
183+#define RDC321X_MAX_GPIO 58
184+
185+struct rdc321x_gpio_pdata {
186+ struct pci_dev *sb_pdev;
187+ unsigned max_gpios;
188+};
189+
190+struct rdc321x_wdt_pdata {
191+ struct pci_dev *sb_pdev;
192+};
193+
194+#endif /* __RDC321X_MFD_H */
195

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