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162 lines
3.6 KiB
162 lines
3.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* lm3533-ctrlbank.c -- LM3533 Generic Control Bank interface |
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* |
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* Copyright (C) 2011-2012 Texas Instruments |
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* |
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* Author: Johan Hovold <[email protected]> |
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*/ |
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#include <linux/device.h> |
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#include <linux/module.h> |
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#include <linux/mfd/lm3533.h> |
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#define LM3533_MAX_CURRENT_MIN 5000 |
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#define LM3533_MAX_CURRENT_MAX 29800 |
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#define LM3533_MAX_CURRENT_STEP 800 |
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#define LM3533_PWM_MAX 0x3f |
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#define LM3533_REG_PWM_BASE 0x14 |
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#define LM3533_REG_MAX_CURRENT_BASE 0x1f |
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#define LM3533_REG_CTRLBANK_ENABLE 0x27 |
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#define LM3533_REG_BRIGHTNESS_BASE 0x40 |
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static inline u8 lm3533_ctrlbank_get_reg(struct lm3533_ctrlbank *cb, u8 base) |
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{ |
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return base + cb->id; |
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} |
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int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb) |
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{ |
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u8 mask; |
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int ret; |
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dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id); |
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mask = 1 << cb->id; |
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ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, |
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mask, mask); |
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if (ret) |
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dev_err(cb->dev, "failed to enable ctrlbank %d\n", cb->id); |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(lm3533_ctrlbank_enable); |
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int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb) |
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{ |
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u8 mask; |
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int ret; |
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dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id); |
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mask = 1 << cb->id; |
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ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, 0, mask); |
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if (ret) |
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dev_err(cb->dev, "failed to disable ctrlbank %d\n", cb->id); |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(lm3533_ctrlbank_disable); |
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/* |
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* Full-scale current. |
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* |
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* imax 5000 - 29800 uA (800 uA step) |
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*/ |
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int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u16 imax) |
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{ |
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u8 reg; |
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u8 val; |
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int ret; |
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if (imax < LM3533_MAX_CURRENT_MIN || imax > LM3533_MAX_CURRENT_MAX) |
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return -EINVAL; |
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val = (imax - LM3533_MAX_CURRENT_MIN) / LM3533_MAX_CURRENT_STEP; |
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reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_MAX_CURRENT_BASE); |
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ret = lm3533_write(cb->lm3533, reg, val); |
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if (ret) |
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dev_err(cb->dev, "failed to set max current\n"); |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_max_current); |
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int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u8 val) |
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{ |
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u8 reg; |
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int ret; |
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reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE); |
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ret = lm3533_write(cb->lm3533, reg, val); |
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if (ret) |
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dev_err(cb->dev, "failed to set brightness\n"); |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_brightness); |
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int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u8 *val) |
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{ |
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u8 reg; |
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int ret; |
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reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE); |
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ret = lm3533_read(cb->lm3533, reg, val); |
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if (ret) |
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dev_err(cb->dev, "failed to get brightness\n"); |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_brightness); |
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/* |
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* PWM-input control mask: |
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* |
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* bit 5 - PWM-input enabled in Zone 4 |
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* bit 4 - PWM-input enabled in Zone 3 |
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* bit 3 - PWM-input enabled in Zone 2 |
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* bit 2 - PWM-input enabled in Zone 1 |
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* bit 1 - PWM-input enabled in Zone 0 |
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* bit 0 - PWM-input enabled |
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*/ |
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int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val) |
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{ |
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u8 reg; |
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int ret; |
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if (val > LM3533_PWM_MAX) |
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return -EINVAL; |
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reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE); |
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ret = lm3533_write(cb->lm3533, reg, val); |
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if (ret) |
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dev_err(cb->dev, "failed to set PWM mask\n"); |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_pwm); |
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int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u8 *val) |
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{ |
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u8 reg; |
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int ret; |
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reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE); |
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ret = lm3533_read(cb->lm3533, reg, val); |
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if (ret) |
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dev_err(cb->dev, "failed to get PWM mask\n"); |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_pwm); |
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MODULE_AUTHOR("Johan Hovold <[email protected]>"); |
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MODULE_DESCRIPTION("LM3533 Control Bank interface"); |
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MODULE_LICENSE("GPL");
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