Root/
1 | /* |
2 | * Copyright (c) 2011, Code Aurora Forum. All rights reserved. |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License version 2 and |
6 | * only version 2 as published by the Free Software Foundation. |
7 | * |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
11 | * GNU General Public License for more details. |
12 | */ |
13 | |
14 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
15 | |
16 | #include <linux/kernel.h> |
17 | #include <linux/platform_device.h> |
18 | #include <linux/slab.h> |
19 | #include <linux/err.h> |
20 | #include <linux/msm_ssbi.h> |
21 | #include <linux/mfd/core.h> |
22 | #include <linux/mfd/pm8xxx/pm8921.h> |
23 | #include <linux/mfd/pm8xxx/core.h> |
24 | |
25 | #define REG_HWREV 0x002 /* PMIC4 revision */ |
26 | #define REG_HWREV_2 0x0E8 /* PMIC4 revision 2 */ |
27 | |
28 | struct pm8921 { |
29 | struct device *dev; |
30 | struct pm_irq_chip *irq_chip; |
31 | }; |
32 | |
33 | static int pm8921_readb(const struct device *dev, u16 addr, u8 *val) |
34 | { |
35 | const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); |
36 | const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data; |
37 | |
38 | return msm_ssbi_read(pmic->dev->parent, addr, val, 1); |
39 | } |
40 | |
41 | static int pm8921_writeb(const struct device *dev, u16 addr, u8 val) |
42 | { |
43 | const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); |
44 | const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data; |
45 | |
46 | return msm_ssbi_write(pmic->dev->parent, addr, &val, 1); |
47 | } |
48 | |
49 | static int pm8921_read_buf(const struct device *dev, u16 addr, u8 *buf, |
50 | int cnt) |
51 | { |
52 | const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); |
53 | const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data; |
54 | |
55 | return msm_ssbi_read(pmic->dev->parent, addr, buf, cnt); |
56 | } |
57 | |
58 | static int pm8921_write_buf(const struct device *dev, u16 addr, u8 *buf, |
59 | int cnt) |
60 | { |
61 | const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); |
62 | const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data; |
63 | |
64 | return msm_ssbi_write(pmic->dev->parent, addr, buf, cnt); |
65 | } |
66 | |
67 | static int pm8921_read_irq_stat(const struct device *dev, int irq) |
68 | { |
69 | const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); |
70 | const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data; |
71 | |
72 | return pm8xxx_get_irq_stat(pmic->irq_chip, irq); |
73 | } |
74 | |
75 | static struct pm8xxx_drvdata pm8921_drvdata = { |
76 | .pmic_readb = pm8921_readb, |
77 | .pmic_writeb = pm8921_writeb, |
78 | .pmic_read_buf = pm8921_read_buf, |
79 | .pmic_write_buf = pm8921_write_buf, |
80 | .pmic_read_irq_stat = pm8921_read_irq_stat, |
81 | }; |
82 | |
83 | static int pm8921_add_subdevices(const struct pm8921_platform_data |
84 | *pdata, |
85 | struct pm8921 *pmic, |
86 | u32 rev) |
87 | { |
88 | int ret = 0, irq_base = 0; |
89 | struct pm_irq_chip *irq_chip; |
90 | |
91 | if (pdata->irq_pdata) { |
92 | pdata->irq_pdata->irq_cdata.nirqs = PM8921_NR_IRQS; |
93 | pdata->irq_pdata->irq_cdata.rev = rev; |
94 | irq_base = pdata->irq_pdata->irq_base; |
95 | irq_chip = pm8xxx_irq_init(pmic->dev, pdata->irq_pdata); |
96 | |
97 | if (IS_ERR(irq_chip)) { |
98 | pr_err("Failed to init interrupts ret=%ld\n", |
99 | PTR_ERR(irq_chip)); |
100 | return PTR_ERR(irq_chip); |
101 | } |
102 | pmic->irq_chip = irq_chip; |
103 | } |
104 | return ret; |
105 | } |
106 | |
107 | static int pm8921_probe(struct platform_device *pdev) |
108 | { |
109 | const struct pm8921_platform_data *pdata = pdev->dev.platform_data; |
110 | struct pm8921 *pmic; |
111 | int rc; |
112 | u8 val; |
113 | u32 rev; |
114 | |
115 | if (!pdata) { |
116 | pr_err("missing platform data\n"); |
117 | return -EINVAL; |
118 | } |
119 | |
120 | pmic = kzalloc(sizeof(struct pm8921), GFP_KERNEL); |
121 | if (!pmic) { |
122 | pr_err("Cannot alloc pm8921 struct\n"); |
123 | return -ENOMEM; |
124 | } |
125 | |
126 | /* Read PMIC chip revision */ |
127 | rc = msm_ssbi_read(pdev->dev.parent, REG_HWREV, &val, sizeof(val)); |
128 | if (rc) { |
129 | pr_err("Failed to read hw rev reg %d:rc=%d\n", REG_HWREV, rc); |
130 | goto err_read_rev; |
131 | } |
132 | pr_info("PMIC revision 1: %02X\n", val); |
133 | rev = val; |
134 | |
135 | /* Read PMIC chip revision 2 */ |
136 | rc = msm_ssbi_read(pdev->dev.parent, REG_HWREV_2, &val, sizeof(val)); |
137 | if (rc) { |
138 | pr_err("Failed to read hw rev 2 reg %d:rc=%d\n", |
139 | REG_HWREV_2, rc); |
140 | goto err_read_rev; |
141 | } |
142 | pr_info("PMIC revision 2: %02X\n", val); |
143 | rev |= val << BITS_PER_BYTE; |
144 | |
145 | pmic->dev = &pdev->dev; |
146 | pm8921_drvdata.pm_chip_data = pmic; |
147 | platform_set_drvdata(pdev, &pm8921_drvdata); |
148 | |
149 | rc = pm8921_add_subdevices(pdata, pmic, rev); |
150 | if (rc) { |
151 | pr_err("Cannot add subdevices rc=%d\n", rc); |
152 | goto err; |
153 | } |
154 | |
155 | /* gpio might not work if no irq device is found */ |
156 | WARN_ON(pmic->irq_chip == NULL); |
157 | |
158 | return 0; |
159 | |
160 | err: |
161 | mfd_remove_devices(pmic->dev); |
162 | platform_set_drvdata(pdev, NULL); |
163 | err_read_rev: |
164 | kfree(pmic); |
165 | return rc; |
166 | } |
167 | |
168 | static int pm8921_remove(struct platform_device *pdev) |
169 | { |
170 | struct pm8xxx_drvdata *drvdata; |
171 | struct pm8921 *pmic = NULL; |
172 | |
173 | drvdata = platform_get_drvdata(pdev); |
174 | if (drvdata) |
175 | pmic = drvdata->pm_chip_data; |
176 | if (pmic) |
177 | mfd_remove_devices(pmic->dev); |
178 | if (pmic->irq_chip) { |
179 | pm8xxx_irq_exit(pmic->irq_chip); |
180 | pmic->irq_chip = NULL; |
181 | } |
182 | platform_set_drvdata(pdev, NULL); |
183 | kfree(pmic); |
184 | |
185 | return 0; |
186 | } |
187 | |
188 | static struct platform_driver pm8921_driver = { |
189 | .probe = pm8921_probe, |
190 | .remove = pm8921_remove, |
191 | .driver = { |
192 | .name = "pm8921-core", |
193 | .owner = THIS_MODULE, |
194 | }, |
195 | }; |
196 | |
197 | static int __init pm8921_init(void) |
198 | { |
199 | return platform_driver_register(&pm8921_driver); |
200 | } |
201 | subsys_initcall(pm8921_init); |
202 | |
203 | static void __exit pm8921_exit(void) |
204 | { |
205 | platform_driver_unregister(&pm8921_driver); |
206 | } |
207 | module_exit(pm8921_exit); |
208 | |
209 | MODULE_LICENSE("GPL v2"); |
210 | MODULE_DESCRIPTION("PMIC 8921 core driver"); |
211 | MODULE_VERSION("1.0"); |
212 | MODULE_ALIAS("platform:pm8921-core"); |
213 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9