116c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold/* 216c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * lm3533-ctrlbank.c -- LM3533 Generic Control Bank interface 316c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * 416c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * Copyright (C) 2011-2012 Texas Instruments 516c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * 616c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * Author: Johan Hovold <jhovold@gmail.com> 716c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * 816c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * This program is free software; you can redistribute it and/or modify it 916c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * under the terms of the GNU General Public License as published by the 1016c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * Free Software Foundation; either version 2 of the License, or (at your 1116c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * option) any later version. 1216c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold */ 1316c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 1416c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold#include <linux/device.h> 1516c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold#include <linux/module.h> 1616c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 1716c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold#include <linux/mfd/lm3533.h> 1816c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 1916c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 206fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold#define LM3533_MAX_CURRENT_MIN 5000 216fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold#define LM3533_MAX_CURRENT_MAX 29800 226fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold#define LM3533_MAX_CURRENT_STEP 800 236fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold 2416c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold#define LM3533_BRIGHTNESS_MAX 255 2516c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold#define LM3533_PWM_MAX 0x3f 2616c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 2716c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold#define LM3533_REG_PWM_BASE 0x14 2816c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold#define LM3533_REG_MAX_CURRENT_BASE 0x1f 2916c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold#define LM3533_REG_CTRLBANK_ENABLE 0x27 3016c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold#define LM3533_REG_BRIGHTNESS_BASE 0x40 3116c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 3216c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 3316c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovoldstatic inline u8 lm3533_ctrlbank_get_reg(struct lm3533_ctrlbank *cb, u8 base) 3416c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold{ 3516c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold return base + cb->id; 3616c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold} 3716c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 3816c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovoldint lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb) 3916c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold{ 4016c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold u8 mask; 4116c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold int ret; 4216c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 4316c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id); 4416c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 4516c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold mask = 1 << cb->id; 4616c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, 4716c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold mask, mask); 4816c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold if (ret) 4916c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold dev_err(cb->dev, "failed to enable ctrlbank %d\n", cb->id); 5016c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 5116c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold return ret; 5216c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold} 5316c5c023aac86228e3e94c4bf6d19708ea861a05Johan HovoldEXPORT_SYMBOL_GPL(lm3533_ctrlbank_enable); 5416c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 5516c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovoldint lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb) 5616c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold{ 5716c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold u8 mask; 5816c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold int ret; 5916c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 6016c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id); 6116c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 6216c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold mask = 1 << cb->id; 6316c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, 0, mask); 6416c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold if (ret) 6516c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold dev_err(cb->dev, "failed to disable ctrlbank %d\n", cb->id); 6616c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 6716c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold return ret; 6816c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold} 6916c5c023aac86228e3e94c4bf6d19708ea861a05Johan HovoldEXPORT_SYMBOL_GPL(lm3533_ctrlbank_disable); 7016c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 716fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold/* 726fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold * Full-scale current. 736fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold * 746fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold * imax 5000 - 29800 uA (800 uA step) 756fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold */ 766fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovoldint lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u16 imax) 776fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold{ 786fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold u8 reg; 796fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold u8 val; 806fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold int ret; 816fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold 826fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold if (imax < LM3533_MAX_CURRENT_MIN || imax > LM3533_MAX_CURRENT_MAX) 836fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold return -EINVAL; 846fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold 856fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold val = (imax - LM3533_MAX_CURRENT_MIN) / LM3533_MAX_CURRENT_STEP; 866fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold 876fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_MAX_CURRENT_BASE); 886fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold ret = lm3533_write(cb->lm3533, reg, val); 896fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold if (ret) 906fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold dev_err(cb->dev, "failed to set max current\n"); 916fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold 926fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold return ret; 936fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold} 946fa4b9d802610116adf4b89c2f9bd155829aafd3Johan HovoldEXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_max_current); 956fa4b9d802610116adf4b89c2f9bd155829aafd3Johan Hovold 9616c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold#define lm3533_ctrlbank_set(_name, _NAME) \ 9716c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovoldint lm3533_ctrlbank_set_##_name(struct lm3533_ctrlbank *cb, u8 val) \ 9816c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold{ \ 9916c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold u8 reg; \ 10016c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold int ret; \ 10116c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold \ 10216c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold if (val > LM3533_##_NAME##_MAX) \ 10316c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold return -EINVAL; \ 10416c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold \ 10516c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE); \ 10616c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold ret = lm3533_write(cb->lm3533, reg, val); \ 10716c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold if (ret) \ 10816c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold dev_err(cb->dev, "failed to set " #_name "\n"); \ 10916c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold \ 11016c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold return ret; \ 11116c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold} \ 11216c5c023aac86228e3e94c4bf6d19708ea861a05Johan HovoldEXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_##_name); 11316c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 11416c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold#define lm3533_ctrlbank_get(_name, _NAME) \ 11516c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovoldint lm3533_ctrlbank_get_##_name(struct lm3533_ctrlbank *cb, u8 *val) \ 11616c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold{ \ 11716c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold u8 reg; \ 11816c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold int ret; \ 11916c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold \ 12016c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE); \ 12116c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold ret = lm3533_read(cb->lm3533, reg, val); \ 12216c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold if (ret) \ 12316c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold dev_err(cb->dev, "failed to get " #_name "\n"); \ 12416c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold \ 12516c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold return ret; \ 12616c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold} \ 12716c5c023aac86228e3e94c4bf6d19708ea861a05Johan HovoldEXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_##_name); 12816c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 12916c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovoldlm3533_ctrlbank_set(brightness, BRIGHTNESS); 13016c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovoldlm3533_ctrlbank_get(brightness, BRIGHTNESS); 13116c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 13216c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold/* 13316c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * PWM-input control mask: 13416c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * 13516c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * bit 5 - PWM-input enabled in Zone 4 13616c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * bit 4 - PWM-input enabled in Zone 3 13716c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * bit 3 - PWM-input enabled in Zone 2 13816c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * bit 2 - PWM-input enabled in Zone 1 13916c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * bit 1 - PWM-input enabled in Zone 0 14016c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold * bit 0 - PWM-input enabled 14116c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold */ 14216c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovoldlm3533_ctrlbank_set(pwm, PWM); 14316c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovoldlm3533_ctrlbank_get(pwm, PWM); 14416c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 14516c5c023aac86228e3e94c4bf6d19708ea861a05Johan Hovold 14616c5c023aac86228e3e94c4bf6d19708ea861a05Johan HovoldMODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>"); 14716c5c023aac86228e3e94c4bf6d19708ea861a05Johan HovoldMODULE_DESCRIPTION("LM3533 Control Bank interface"); 14816c5c023aac86228e3e94c4bf6d19708ea861a05Johan HovoldMODULE_LICENSE("GPL"); 149