2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
// 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 <jhovold@gmail.com>
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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_BRIGHTNESS_MAX 255
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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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#define lm3533_ctrlbank_set(_name, _NAME) \
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int lm3533_ctrlbank_set_##_name(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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\
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if (val > LM3533_##_NAME##_MAX) \
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return -EINVAL; \
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\
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reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_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 " #_name "\n"); \
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\
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return ret; \
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} \
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EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_##_name);
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#define lm3533_ctrlbank_get(_name, _NAME) \
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int lm3533_ctrlbank_get_##_name(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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\
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reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_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 " #_name "\n"); \
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\
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return ret; \
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} \
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EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_##_name);
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lm3533_ctrlbank_set(brightness, BRIGHTNESS);
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lm3533_ctrlbank_get(brightness, 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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lm3533_ctrlbank_set(pwm, PWM);
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lm3533_ctrlbank_get(pwm, PWM);
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MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
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MODULE_DESCRIPTION("LM3533 Control Bank interface");
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MODULE_LICENSE("GPL");
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