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Viewing changes to drivers/mfd/lm3533-ctrlbank.c

  • Committer: Package Import Robot
  • Author(s): Paolo Pisati, Paolo Pisati, Stefan Bader, Upstream Kernel Changes
  • Date: 2012-08-15 17:17:43 UTC
  • Revision ID: package-import@ubuntu.com-20120815171743-h5wnuf51xe7pvdid
Tags: 3.5.0-207.13
[ Paolo Pisati ]

* Start new release

[ Stefan Bader ]

* (config) Enable getabis to use local package copies

[ Upstream Kernel Changes ]

* fixup: gargabe collect iva_seq[0|1] init
* [Config] enable all SND_OMAP_SOC_*s
* fixup: cm2xxx_3xxx.o is needed for omap2_cm_read|write_reg
* fixup: add some snd_soc_dai* helper functions
* fixup: s/snd_soc_dpcm_params/snd_soc_dpcm/g
* fixup: typo, no_host_mode and useless SDP4430 init
* fixup: enable again aess hwmod

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Lines of Context:
drivers/mfd/lm3533-ctrlbank.c
 
1
/*
 
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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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 * This program is free software; you can redistribute it and/or modify it
 
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 * under  the terms of the GNU General  Public License as published by the
 
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 * Free Software Foundation;  either version 2 of the License, or (at your
 
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 * option) any later version.
 
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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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19
 
 
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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;                                                     \
 
126
}                                                                       \
 
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EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_##_name);
 
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129
lm3533_ctrlbank_set(brightness, BRIGHTNESS);
 
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lm3533_ctrlbank_get(brightness, BRIGHTNESS);
 
131
 
 
132
/*
 
133
 * PWM-input control mask:
 
134
 *
 
135
 *   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
 
141
 */
 
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lm3533_ctrlbank_set(pwm, PWM);
 
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lm3533_ctrlbank_get(pwm, PWM);
 
144
 
 
145
 
 
146
MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
 
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MODULE_DESCRIPTION("LM3533 Control Bank interface");
 
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MODULE_LICENSE("GPL");