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Release 4.7 drivers/mfd/lm3533-ctrlbank.c

Directory: drivers/mfd
/*
 * lm3533-ctrlbank.c -- LM3533 Generic Control Bank interface
 *
 * Copyright (C) 2011-2012 Texas Instruments
 *
 * Author: Johan Hovold <jhovold@gmail.com>
 *
 * 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/device.h>
#include <linux/module.h>

#include <linux/mfd/lm3533.h>



#define LM3533_MAX_CURRENT_MIN		5000

#define LM3533_MAX_CURRENT_MAX		29800

#define LM3533_MAX_CURRENT_STEP		800


#define LM3533_BRIGHTNESS_MAX		255

#define LM3533_PWM_MAX			0x3f


#define LM3533_REG_PWM_BASE		0x14

#define LM3533_REG_MAX_CURRENT_BASE	0x1f

#define LM3533_REG_CTRLBANK_ENABLE	0x27

#define LM3533_REG_BRIGHTNESS_BASE	0x40



static inline u8 lm3533_ctrlbank_get_reg(struct lm3533_ctrlbank *cb, u8 base) { return base + cb->id; }

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int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb) { u8 mask; int ret; dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id); mask = 1 << cb->id; ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, mask, mask); if (ret) dev_err(cb->dev, "failed to enable ctrlbank %d\n", cb->id); return ret; }

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EXPORT_SYMBOL_GPL(lm3533_ctrlbank_enable);
int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb) { u8 mask; int ret; dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id); mask = 1 << cb->id; ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, 0, mask); if (ret) dev_err(cb->dev, "failed to disable ctrlbank %d\n", cb->id); return ret; }

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EXPORT_SYMBOL_GPL(lm3533_ctrlbank_disable); /* * Full-scale current. * * imax 5000 - 29800 uA (800 uA step) */
int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u16 imax) { u8 reg; u8 val; int ret; if (imax < LM3533_MAX_CURRENT_MIN || imax > LM3533_MAX_CURRENT_MAX) return -EINVAL; val = (imax - LM3533_MAX_CURRENT_MIN) / LM3533_MAX_CURRENT_STEP; reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_MAX_CURRENT_BASE); ret = lm3533_write(cb->lm3533, reg, val); if (ret) dev_err(cb->dev, "failed to set max current\n"); return ret; }

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EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_max_current); #define lm3533_ctrlbank_set(_name, _NAME) \ int lm3533_ctrlbank_set_##_name(struct lm3533_ctrlbank *cb, u8 val) \ { \ u8 reg; \ int ret; \ \ if (val > LM3533_##_NAME##_MAX) \ return -EINVAL; \ \ reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE); \ ret = lm3533_write(cb->lm3533, reg, val); \ if (ret) \ dev_err(cb->dev, "failed to set " #_name "\n"); \ \ return ret; \ } \ EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_##_name); #define lm3533_ctrlbank_get(_name, _NAME) \ int lm3533_ctrlbank_get_##_name(struct lm3533_ctrlbank *cb, u8 *val) \ { \ u8 reg; \ int ret; \ \ reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE); \ ret = lm3533_read(cb->lm3533, reg, val); \ if (ret) \ dev_err(cb->dev, "failed to get " #_name "\n"); \ \ return ret; \ } \ EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_##_name); lm3533_ctrlbank_set(brightness, BRIGHTNESS); lm3533_ctrlbank_get(brightness, BRIGHTNESS); /* * PWM-input control mask: * * bit 5 - PWM-input enabled in Zone 4 * bit 4 - PWM-input enabled in Zone 3 * bit 3 - PWM-input enabled in Zone 2 * bit 2 - PWM-input enabled in Zone 1 * bit 1 - PWM-input enabled in Zone 0 * bit 0 - PWM-input enabled */ lm3533_ctrlbank_set(pwm, PWM); lm3533_ctrlbank_get(pwm, PWM); MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>"); MODULE_DESCRIPTION("LM3533 Control Bank interface"); MODULE_LICENSE("GPL");

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Directory: drivers/mfd
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