/* * 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; } 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; } 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; } 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; } 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");