projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 90550d19 MN |
1 | /* |
| 2 | * Copyright (C) ST-Ericsson SA 2010 | |
| 3 | * Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com> for ST Ericsson. | |
| 4 | * License terms: GNU General Public License (GPL) version 2 | |
| 5 | */ | |
| 6 | ||
| 7 | #include <linux/err.h> | |
| 4e36dd33 | 8 | #include <linux/module.h> |
| 90550d19 | 9 | #include <linux/platform_device.h> |
| 90550d19 | 10 | #include <linux/mfd/abx500.h> |
| ee66e653 LW |
11 | #include <linux/mfd/abx500/ab8500.h> |
| 12 | #include <linux/mfd/abx500/ab8500-sysctrl.h> | |
| 90550d19 MN |
13 | |
| 14 | static struct device *sysctrl_dev; | |
| 15 | ||
| 16 | static inline bool valid_bank(u8 bank) | |
| 17 | { | |
| 18 | return ((bank == AB8500_SYS_CTRL1_BLOCK) || | |
| 19 | (bank == AB8500_SYS_CTRL2_BLOCK)); | |
| 20 | } | |
| 21 | ||
| 22 | int ab8500_sysctrl_read(u16 reg, u8 *value) | |
| 23 | { | |
| 24 | u8 bank; | |
| 25 | ||
| 26 | if (sysctrl_dev == NULL) | |
| 27 | return -EAGAIN; | |
| 28 | ||
| 29 | bank = (reg >> 8); | |
| 30 | if (!valid_bank(bank)) | |
| 31 | return -EINVAL; | |
| 32 | ||
| 33 | return abx500_get_register_interruptible(sysctrl_dev, bank, | |
| 34 | (u8)(reg & 0xFF), value); | |
| 35 | } | |
| 36 | ||
| 37 | int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value) | |
| 38 | { | |
| 39 | u8 bank; | |
| 40 | ||
| 41 | if (sysctrl_dev == NULL) | |
| 42 | return -EAGAIN; | |
| 43 | ||
| 44 | bank = (reg >> 8); | |
| 45 | if (!valid_bank(bank)) | |
| 46 | return -EINVAL; | |
| 47 | ||
| 48 | return abx500_mask_and_set_register_interruptible(sysctrl_dev, bank, | |
| 49 | (u8)(reg & 0xFF), mask, value); | |
| 50 | } | |
| 51 | ||
| 52 | static int __devinit ab8500_sysctrl_probe(struct platform_device *pdev) | |
| 53 | { | |
| 54 | sysctrl_dev = &pdev->dev; | |
| 55 | return 0; | |
| 56 | } | |
| 57 | ||
| 58 | static int __devexit ab8500_sysctrl_remove(struct platform_device *pdev) | |
| 59 | { | |
| 60 | sysctrl_dev = NULL; | |
| 61 | return 0; | |
| 62 | } | |
| 63 | ||
| 01247ef7 LJ |
64 | static const struct of_device_id ab8500_sysctrl_match[] = { |
| 65 | { .compatible = "stericsson,ab8500-sysctrl", }, | |
| 66 | {} | |
| 67 | }; | |
| 68 | ||
| 90550d19 MN |
69 | static struct platform_driver ab8500_sysctrl_driver = { |
| 70 | .driver = { | |
| 71 | .name = "ab8500-sysctrl", | |
| 72 | .owner = THIS_MODULE, | |
| 01247ef7 | 73 | .of_match_table = ab8500_sysctrl_match, |
| 90550d19 MN |
74 | }, |
| 75 | .probe = ab8500_sysctrl_probe, | |
| 76 | .remove = __devexit_p(ab8500_sysctrl_remove), | |
| 77 | }; | |
| 78 | ||
| 79 | static int __init ab8500_sysctrl_init(void) | |
| 80 | { | |
| 81 | return platform_driver_register(&ab8500_sysctrl_driver); | |
| 82 | } | |
| 83 | subsys_initcall(ab8500_sysctrl_init); | |
| 84 | ||
| 85 | MODULE_AUTHOR("Mattias Nilsson <mattias.i.nilsson@stericsson.com"); | |
| 86 | MODULE_DESCRIPTION("AB8500 system control driver"); | |
| 87 | MODULE_LICENSE("GPL v2"); |