Eric Lee / smarc-fsl-linux-kernel

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drivers/mfd/lm3533-ctrlbank.c 3.62 KB
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2874c5fd2   Thomas Gleixner   treewide: Replace... 
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  // SPDX-License-Identifier: GPL-2.0-or-later
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  /*
   * lm3533-ctrlbank.c -- LM3533 Generic Control Bank interface
   *
   * Copyright (C) 2011-2012 Texas Instruments
   *
   * Author: Johan Hovold <jhovold@gmail.com>
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   */
  
  #include <linux/device.h>
  #include <linux/module.h>
  
  #include <linux/mfd/lm3533.h>
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  #define LM3533_MAX_CURRENT_MIN		5000
  #define LM3533_MAX_CURRENT_MAX		29800
  #define LM3533_MAX_CURRENT_STEP		800
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  #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
  ", __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
  ", 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
  ", __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
  ", cb->id);
  
  	return ret;
  }
  EXPORT_SYMBOL_GPL(lm3533_ctrlbank_disable);
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  /*
   * 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
  ");
  
  	return ret;
  }
  EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_max_current);
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  int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u8 val)
  {
  	u8 reg;
  	int ret;
  
  	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE);
  	ret = lm3533_write(cb->lm3533, reg, val);
  	if (ret)
  		dev_err(cb->dev, "failed to set brightness
  ");
  
  	return ret;
  }
  EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_brightness);
  
  int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u8 *val)
  {
  	u8 reg;
  	int ret;
  
  	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE);
  	ret = lm3533_read(cb->lm3533, reg, val);
  	if (ret)
  		dev_err(cb->dev, "failed to get brightness
  ");
  
  	return ret;
  }
  EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_brightness);
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  /*
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   * 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
   */
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  int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val)
  {
  	u8 reg;
  	int ret;
  
  	if (val > LM3533_PWM_MAX)
  		return -EINVAL;
  
  	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE);
  	ret = lm3533_write(cb->lm3533, reg, val);
  	if (ret)
  		dev_err(cb->dev, "failed to set PWM mask
  ");
  
  	return ret;
  }
  EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_pwm);
  
  int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u8 *val)
  {
  	u8 reg;
  	int ret;
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4d3ec936f
 
 Johan Hovold
 
mfd: lm3533: Expa...




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  	reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE);
  	ret = lm3533_read(cb->lm3533, reg, val);
  	if (ret)
  		dev_err(cb->dev, "failed to get PWM mask
  ");
  
  	return ret;
  }
  EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_pwm);









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  MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
  MODULE_DESCRIPTION("LM3533 Control Bank interface");
  MODULE_LICENSE("GPL");