diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/mfd/tps65911-comparator.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/mfd/tps65911-comparator.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/ANDROID_3.4.5/drivers/mfd/tps65911-comparator.c b/ANDROID_3.4.5/drivers/mfd/tps65911-comparator.c deleted file mode 100644 index e7ff783a..00000000 --- a/ANDROID_3.4.5/drivers/mfd/tps65911-comparator.c +++ /dev/null @@ -1,190 +0,0 @@ -/* - * tps65910.c -- TI TPS6591x - * - * Copyright 2010 Texas Instruments Inc. - * - * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> - * - * 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/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/err.h> -#include <linux/platform_device.h> -#include <linux/debugfs.h> -#include <linux/gpio.h> -#include <linux/mfd/tps65910.h> - -#define COMP 0 -#define COMP1 1 -#define COMP2 2 - -/* Comparator 1 voltage selection table in milivolts */ -static const u16 COMP_VSEL_TABLE[] = { - 0, 2500, 2500, 2500, 2500, 2550, 2600, 2650, - 2700, 2750, 2800, 2850, 2900, 2950, 3000, 3050, - 3100, 3150, 3200, 3250, 3300, 3350, 3400, 3450, - 3500, -}; - -struct comparator { - const char *name; - int reg; - int uV_max; - const u16 *vsel_table; -}; - -static struct comparator tps_comparators[] = { - { - .name = "COMP1", - .reg = TPS65911_VMBCH, - .uV_max = 3500, - .vsel_table = COMP_VSEL_TABLE, - }, - { - .name = "COMP2", - .reg = TPS65911_VMBCH2, - .uV_max = 3500, - .vsel_table = COMP_VSEL_TABLE, - }, -}; - -static int comp_threshold_set(struct tps65910 *tps65910, int id, int voltage) -{ - struct comparator tps_comp = tps_comparators[id]; - int curr_voltage = 0; - int ret; - u8 index = 0, val; - - if (id == COMP) - return 0; - - while (curr_voltage < tps_comp.uV_max) { - curr_voltage = tps_comp.vsel_table[index]; - if (curr_voltage >= voltage) - break; - else if (curr_voltage < voltage) - index ++; - } - - if (curr_voltage > tps_comp.uV_max) - return -EINVAL; - - val = index << 1; - ret = tps65910->write(tps65910, tps_comp.reg, 1, &val); - - return ret; -} - -static int comp_threshold_get(struct tps65910 *tps65910, int id) -{ - struct comparator tps_comp = tps_comparators[id]; - int ret; - u8 val; - - if (id == COMP) - return 0; - - ret = tps65910->read(tps65910, tps_comp.reg, 1, &val); - if (ret < 0) - return ret; - - val >>= 1; - return tps_comp.vsel_table[val]; -} - -static ssize_t comp_threshold_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct tps65910 *tps65910 = dev_get_drvdata(dev->parent); - struct attribute comp_attr = attr->attr; - int id, uVolt; - - if (!strcmp(comp_attr.name, "comp1_threshold")) - id = COMP1; - else if (!strcmp(comp_attr.name, "comp2_threshold")) - id = COMP2; - else - return -EINVAL; - - uVolt = comp_threshold_get(tps65910, id); - - return sprintf(buf, "%d\n", uVolt); -} - -static DEVICE_ATTR(comp1_threshold, S_IRUGO, comp_threshold_show, NULL); -static DEVICE_ATTR(comp2_threshold, S_IRUGO, comp_threshold_show, NULL); - -static __devinit int tps65911_comparator_probe(struct platform_device *pdev) -{ - struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent); - struct tps65910_board *pdata = dev_get_platdata(tps65910->dev); - int ret; - - ret = comp_threshold_set(tps65910, COMP1, pdata->vmbch_threshold); - if (ret < 0) { - dev_err(&pdev->dev, "cannot set COMP1 threshold\n"); - return ret; - } - - ret = comp_threshold_set(tps65910, COMP2, pdata->vmbch2_threshold); - if (ret < 0) { - dev_err(&pdev->dev, "cannot set COMP2 theshold\n"); - return ret; - } - - /* Create sysfs entry */ - ret = device_create_file(&pdev->dev, &dev_attr_comp1_threshold); - if (ret < 0) - dev_err(&pdev->dev, "failed to add COMP1 sysfs file\n"); - - ret = device_create_file(&pdev->dev, &dev_attr_comp2_threshold); - if (ret < 0) - dev_err(&pdev->dev, "failed to add COMP2 sysfs file\n"); - - return ret; -} - -static __devexit int tps65911_comparator_remove(struct platform_device *pdev) -{ - struct tps65910 *tps65910; - - tps65910 = dev_get_drvdata(pdev->dev.parent); - device_remove_file(&pdev->dev, &dev_attr_comp2_threshold); - device_remove_file(&pdev->dev, &dev_attr_comp1_threshold); - - return 0; -} - -static struct platform_driver tps65911_comparator_driver = { - .driver = { - .name = "tps65911-comparator", - .owner = THIS_MODULE, - }, - .probe = tps65911_comparator_probe, - .remove = __devexit_p(tps65911_comparator_remove), -}; - -static int __init tps65911_comparator_init(void) -{ - return platform_driver_register(&tps65911_comparator_driver); -} -subsys_initcall(tps65911_comparator_init); - -static void __exit tps65911_comparator_exit(void) -{ - platform_driver_unregister(&tps65911_comparator_driver); -} -module_exit(tps65911_comparator_exit); - -MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>"); -MODULE_DESCRIPTION("TPS65911 comparator driver"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:tps65911-comparator"); |