mfd: Add LM3533 lighting-power core driver
Add support for National Semiconductor / TI LM3533 lighting power chips. This is the core driver which provides register access over I2C and registers the ambient-light-sensor, LED and backlight sub-drivers. Signed-off-by: Johan Hovold <jhovold@gmail.com> Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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38
Documentation/ABI/testing/sysfs-bus-i2c-devices-lm3533
Normal file
38
Documentation/ABI/testing/sysfs-bus-i2c-devices-lm3533
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@ -0,0 +1,38 @@
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What: /sys/bus/i2c/devices/.../boost_freq
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Date: April 2012
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KernelVersion: 3.5
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Contact: Johan Hovold <jhovold@gmail.com>
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Description:
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Set the boost converter switching frequency (0, 1), where
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0 - 500Hz
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1 - 1000Hz
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What: /sys/bus/i2c/devices/.../boost_ovp
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Date: April 2012
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KernelVersion: 3.5
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Contact: Johan Hovold <jhovold@gmail.com>
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Description:
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Set the boost converter over-voltage protection threshold
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(0..3), where
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0 - 16V
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1 - 24V
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2 - 32V
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3 - 40V
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What: /sys/bus/i2c/devices/.../output_hvled[n]
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Date: April 2012
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KernelVersion: 3.5
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Contact: Johan Hovold <jhovold@gmail.com>
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Description:
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Set the controlling backlight device for high-voltage current
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sink HVLED[n] (n = 1, 2) (0, 1).
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What: /sys/bus/i2c/devices/.../output_lvled[n]
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Date: April 2012
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KernelVersion: 3.5
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Contact: Johan Hovold <jhovold@gmail.com>
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Description:
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Set the controlling led device for low-voltage current sink
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LVLED[n] (n = 1..5) (0..3).
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@ -106,6 +106,19 @@ config UCB1400_CORE
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To compile this driver as a module, choose M here: the
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module will be called ucb1400_core.
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config MFD_LM3533
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tristate "LM3533 Lighting Power chip"
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depends on I2C
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select MFD_CORE
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select REGMAP_I2C
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help
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Say yes here to enable support for National Semiconductor / TI
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LM3533 Lighting Power chips.
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This driver provides common support for accessing the device;
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additional drivers must be enabled in order to use the LED,
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backlight or ambient-light-sensor functionality of the device.
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config TPS6105X
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tristate "TPS61050/61052 Boost Converters"
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depends on I2C
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@ -120,3 +120,4 @@ obj-$(CONFIG_MFD_INTEL_MSIC) += intel_msic.o
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obj-$(CONFIG_MFD_RC5T583) += rc5t583.o rc5t583-irq.o
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obj-$(CONFIG_MFD_S5M_CORE) += s5m-core.o s5m-irq.o
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obj-$(CONFIG_MFD_ANATOP) += anatop-mfd.o
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obj-$(CONFIG_MFD_LM3533) += lm3533-core.o lm3533-ctrlbank.o
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717
drivers/mfd/lm3533-core.c
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717
drivers/mfd/lm3533-core.c
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@ -0,0 +1,717 @@
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/*
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* lm3533-core.c -- LM3533 Core
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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/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/i2c.h>
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#include <linux/mfd/core.h>
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#include <linux/regmap.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/mfd/lm3533.h>
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#define LM3533_BOOST_OVP_MAX 0x03
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#define LM3533_BOOST_OVP_MASK 0x06
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#define LM3533_BOOST_OVP_SHIFT 1
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#define LM3533_BOOST_FREQ_MAX 0x01
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#define LM3533_BOOST_FREQ_MASK 0x01
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#define LM3533_BOOST_FREQ_SHIFT 0
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#define LM3533_BL_ID_MASK 1
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#define LM3533_LED_ID_MASK 3
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#define LM3533_BL_ID_MAX 1
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#define LM3533_LED_ID_MAX 3
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#define LM3533_HVLED_ID_MAX 2
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#define LM3533_LVLED_ID_MAX 5
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#define LM3533_REG_OUTPUT_CONF1 0x10
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#define LM3533_REG_OUTPUT_CONF2 0x11
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#define LM3533_REG_BOOST_PWM 0x2c
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#define LM3533_REG_MAX 0xb2
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static struct mfd_cell lm3533_als_devs[] = {
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{
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.name = "lm3533-als",
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.id = -1,
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},
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};
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static struct mfd_cell lm3533_bl_devs[] = {
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{
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.name = "lm3533-backlight",
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.id = 0,
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},
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{
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.name = "lm3533-backlight",
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.id = 1,
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},
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};
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static struct mfd_cell lm3533_led_devs[] = {
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{
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.name = "lm3533-leds",
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.id = 0,
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},
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{
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.name = "lm3533-leds",
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.id = 1,
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},
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{
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.name = "lm3533-leds",
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.id = 2,
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},
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{
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.name = "lm3533-leds",
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.id = 3,
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},
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};
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int lm3533_read(struct lm3533 *lm3533, u8 reg, u8 *val)
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{
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int tmp;
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int ret;
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ret = regmap_read(lm3533->regmap, reg, &tmp);
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if (ret < 0) {
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dev_err(lm3533->dev, "failed to read register %02x: %d\n",
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reg, ret);
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return ret;
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}
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*val = tmp;
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dev_dbg(lm3533->dev, "read [%02x]: %02x\n", reg, *val);
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return ret;
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}
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EXPORT_SYMBOL_GPL(lm3533_read);
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int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val)
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{
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int ret;
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dev_dbg(lm3533->dev, "write [%02x]: %02x\n", reg, val);
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ret = regmap_write(lm3533->regmap, reg, val);
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if (ret < 0) {
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dev_err(lm3533->dev, "failed to write register %02x: %d\n",
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reg, ret);
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(lm3533_write);
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int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask)
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{
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int ret;
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dev_dbg(lm3533->dev, "update [%02x]: %02x/%02x\n", reg, val, mask);
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ret = regmap_update_bits(lm3533->regmap, reg, val, mask);
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if (ret < 0) {
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dev_err(lm3533->dev, "failed to update register %02x: %d\n",
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reg, ret);
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(lm3533_update);
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/*
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* HVLED output config -- output hvled controlled by backlight bl
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*/
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static int lm3533_set_hvled_config(struct lm3533 *lm3533, u8 hvled, u8 bl)
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{
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u8 val;
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u8 mask;
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int shift;
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int ret;
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if (hvled == 0 || hvled > LM3533_HVLED_ID_MAX)
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return -EINVAL;
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if (bl > LM3533_BL_ID_MAX)
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return -EINVAL;
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shift = hvled - 1;
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mask = LM3533_BL_ID_MASK << shift;
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val = bl << shift;
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ret = lm3533_update(lm3533, LM3533_REG_OUTPUT_CONF1, val, mask);
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if (ret)
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dev_err(lm3533->dev, "failed to set hvled config\n");
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return ret;
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}
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/*
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* LVLED output config -- output lvled controlled by LED led
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*/
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static int lm3533_set_lvled_config(struct lm3533 *lm3533, u8 lvled, u8 led)
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{
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u8 reg;
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u8 val;
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u8 mask;
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int shift;
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int ret;
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if (lvled == 0 || lvled > LM3533_LVLED_ID_MAX)
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return -EINVAL;
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if (led > LM3533_LED_ID_MAX)
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return -EINVAL;
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if (lvled < 4) {
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reg = LM3533_REG_OUTPUT_CONF1;
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shift = 2 * lvled;
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} else {
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reg = LM3533_REG_OUTPUT_CONF2;
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shift = 2 * (lvled - 4);
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}
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mask = LM3533_LED_ID_MASK << shift;
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val = led << shift;
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ret = lm3533_update(lm3533, reg, val, mask);
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if (ret)
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dev_err(lm3533->dev, "failed to set lvled config\n");
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return ret;
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}
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static void lm3533_enable(struct lm3533 *lm3533)
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{
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if (gpio_is_valid(lm3533->gpio_hwen))
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gpio_set_value(lm3533->gpio_hwen, 1);
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}
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static void lm3533_disable(struct lm3533 *lm3533)
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{
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if (gpio_is_valid(lm3533->gpio_hwen))
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gpio_set_value(lm3533->gpio_hwen, 0);
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}
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enum lm3533_attribute_type {
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LM3533_ATTR_TYPE_BACKLIGHT,
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LM3533_ATTR_TYPE_LED,
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};
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struct lm3533_device_attribute {
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struct device_attribute dev_attr;
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enum lm3533_attribute_type type;
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union {
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struct {
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u8 id;
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} output;
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struct {
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u8 reg;
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u8 shift;
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u8 mask;
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u8 max;
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} generic;
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} u;
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};
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#define to_lm3533_dev_attr(_attr) \
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container_of(_attr, struct lm3533_device_attribute, dev_attr)
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static ssize_t show_lm3533_reg(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct lm3533 *lm3533 = dev_get_drvdata(dev);
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struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
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u8 val;
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int ret;
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ret = lm3533_read(lm3533, lattr->u.generic.reg, &val);
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if (ret)
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return ret;
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val = (val & lattr->u.generic.mask) >> lattr->u.generic.shift;
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return scnprintf(buf, PAGE_SIZE, "%u\n", val);
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}
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static ssize_t store_lm3533_reg(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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struct lm3533 *lm3533 = dev_get_drvdata(dev);
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struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
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u8 val;
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int ret;
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if (kstrtou8(buf, 0, &val) || val > lattr->u.generic.max)
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return -EINVAL;
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val = val << lattr->u.generic.shift;
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ret = lm3533_update(lm3533, lattr->u.generic.reg, val,
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lattr->u.generic.mask);
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if (ret)
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return ret;
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return len;
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}
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#define GENERIC_ATTR(_reg, _max, _mask, _shift) \
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{ .reg = _reg, \
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.max = _max, \
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.mask = _mask, \
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.shift = _shift }
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#define LM3533_GENERIC_ATTR(_name, _mode, _show, _store, _type, \
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_reg, _max, _mask, _shift) \
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struct lm3533_device_attribute lm3533_dev_attr_##_name = { \
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.dev_attr = __ATTR(_name, _mode, _show, _store), \
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.type = _type, \
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.u.generic = GENERIC_ATTR(_reg, _max, _mask, _shift) }
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#define LM3533_GENERIC_ATTR_RW(_name, _type, _reg, _max, _mask, _shift) \
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LM3533_GENERIC_ATTR(_name, S_IRUGO | S_IWUSR, \
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show_lm3533_reg, store_lm3533_reg, \
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_type, _reg, _max, _mask, _shift)
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#define LM3533_BOOST_ATTR_RW(_name, _NAME) \
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LM3533_GENERIC_ATTR_RW(_name, LM3533_ATTR_TYPE_BACKLIGHT, \
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LM3533_REG_BOOST_PWM, LM3533_##_NAME##_MAX, \
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LM3533_##_NAME##_MASK, LM3533_##_NAME##_SHIFT)
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/*
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* Boost Over Voltage Protection Select
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*
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* 0 - 16 V (default)
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* 1 - 24 V
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* 2 - 32 V
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* 3 - 40 V
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*/
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static LM3533_BOOST_ATTR_RW(boost_ovp, BOOST_OVP);
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/*
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* Boost Frequency Select
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*
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* 0 - 500 kHz (default)
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* 1 - 1 MHz
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*/
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static LM3533_BOOST_ATTR_RW(boost_freq, BOOST_FREQ);
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static ssize_t show_output(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct lm3533 *lm3533 = dev_get_drvdata(dev);
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struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
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int id = lattr->u.output.id;
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u8 reg;
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u8 val;
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u8 mask;
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int shift;
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int ret;
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if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT) {
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reg = LM3533_REG_OUTPUT_CONF1;
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shift = id - 1;
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mask = LM3533_BL_ID_MASK << shift;
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} else {
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if (id < 4) {
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reg = LM3533_REG_OUTPUT_CONF1;
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shift = 2 * id;
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} else {
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reg = LM3533_REG_OUTPUT_CONF2;
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shift = 2 * (id - 4);
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}
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mask = LM3533_LED_ID_MASK << shift;
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}
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ret = lm3533_read(lm3533, reg, &val);
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if (ret)
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return ret;
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val = (val & mask) >> shift;
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return scnprintf(buf, PAGE_SIZE, "%u\n", val);
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}
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static ssize_t store_output(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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struct lm3533 *lm3533 = dev_get_drvdata(dev);
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struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
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int id = lattr->u.output.id;
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u8 val;
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int ret;
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if (kstrtou8(buf, 0, &val))
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return -EINVAL;
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if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT)
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ret = lm3533_set_hvled_config(lm3533, id, val);
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else
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ret = lm3533_set_lvled_config(lm3533, id, val);
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if (ret)
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return ret;
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return len;
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}
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#define LM3533_OUTPUT_ATTR(_name, _mode, _show, _store, _type, _id) \
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struct lm3533_device_attribute lm3533_dev_attr_##_name = \
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{ .dev_attr = __ATTR(_name, _mode, _show, _store), \
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.type = _type, \
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.u.output = { .id = _id }, }
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#define LM3533_OUTPUT_ATTR_RW(_name, _type, _id) \
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LM3533_OUTPUT_ATTR(output_##_name, S_IRUGO | S_IWUSR, \
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show_output, store_output, _type, _id)
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#define LM3533_OUTPUT_HVLED_ATTR_RW(_nr) \
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LM3533_OUTPUT_ATTR_RW(hvled##_nr, LM3533_ATTR_TYPE_BACKLIGHT, _nr)
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#define LM3533_OUTPUT_LVLED_ATTR_RW(_nr) \
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LM3533_OUTPUT_ATTR_RW(lvled##_nr, LM3533_ATTR_TYPE_LED, _nr)
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/*
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* Output config:
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*
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* output_hvled<nr> 0-1
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* output_lvled<nr> 0-3
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*/
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static LM3533_OUTPUT_HVLED_ATTR_RW(1);
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static LM3533_OUTPUT_HVLED_ATTR_RW(2);
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static LM3533_OUTPUT_LVLED_ATTR_RW(1);
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||||
static LM3533_OUTPUT_LVLED_ATTR_RW(2);
|
||||
static LM3533_OUTPUT_LVLED_ATTR_RW(3);
|
||||
static LM3533_OUTPUT_LVLED_ATTR_RW(4);
|
||||
static LM3533_OUTPUT_LVLED_ATTR_RW(5);
|
||||
|
||||
static struct attribute *lm3533_attributes[] = {
|
||||
&lm3533_dev_attr_boost_freq.dev_attr.attr,
|
||||
&lm3533_dev_attr_boost_ovp.dev_attr.attr,
|
||||
&lm3533_dev_attr_output_hvled1.dev_attr.attr,
|
||||
&lm3533_dev_attr_output_hvled2.dev_attr.attr,
|
||||
&lm3533_dev_attr_output_lvled1.dev_attr.attr,
|
||||
&lm3533_dev_attr_output_lvled2.dev_attr.attr,
|
||||
&lm3533_dev_attr_output_lvled3.dev_attr.attr,
|
||||
&lm3533_dev_attr_output_lvled4.dev_attr.attr,
|
||||
&lm3533_dev_attr_output_lvled5.dev_attr.attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
#define to_dev_attr(_attr) \
|
||||
container_of(_attr, struct device_attribute, attr)
|
||||
|
||||
static mode_t lm3533_attr_is_visible(struct kobject *kobj,
|
||||
struct attribute *attr, int n)
|
||||
{
|
||||
struct device *dev = container_of(kobj, struct device, kobj);
|
||||
struct lm3533 *lm3533 = dev_get_drvdata(dev);
|
||||
struct device_attribute *dattr = to_dev_attr(attr);
|
||||
struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(dattr);
|
||||
enum lm3533_attribute_type type = lattr->type;
|
||||
mode_t mode = attr->mode;
|
||||
|
||||
if (!lm3533->have_backlights && type == LM3533_ATTR_TYPE_BACKLIGHT)
|
||||
mode = 0;
|
||||
else if (!lm3533->have_leds && type == LM3533_ATTR_TYPE_LED)
|
||||
mode = 0;
|
||||
|
||||
return mode;
|
||||
};
|
||||
|
||||
static struct attribute_group lm3533_attribute_group = {
|
||||
.is_visible = lm3533_attr_is_visible,
|
||||
.attrs = lm3533_attributes
|
||||
};
|
||||
|
||||
static int __devinit lm3533_device_als_init(struct lm3533 *lm3533)
|
||||
{
|
||||
struct lm3533_platform_data *pdata = lm3533->dev->platform_data;
|
||||
int ret;
|
||||
|
||||
if (!pdata->als)
|
||||
return 0;
|
||||
|
||||
lm3533_als_devs[0].platform_data = pdata->als;
|
||||
lm3533_als_devs[0].pdata_size = sizeof(*pdata->als);
|
||||
|
||||
ret = mfd_add_devices(lm3533->dev, 0, lm3533_als_devs, 1, NULL, 0);
|
||||
if (ret) {
|
||||
dev_err(lm3533->dev, "failed to add ALS device\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
lm3533->have_als = 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __devinit lm3533_device_bl_init(struct lm3533 *lm3533)
|
||||
{
|
||||
struct lm3533_platform_data *pdata = lm3533->dev->platform_data;
|
||||
int i;
|
||||
int ret;
|
||||
|
||||
if (!pdata->backlights || pdata->num_backlights == 0)
|
||||
return 0;
|
||||
|
||||
if (pdata->num_backlights > ARRAY_SIZE(lm3533_bl_devs))
|
||||
pdata->num_backlights = ARRAY_SIZE(lm3533_bl_devs);
|
||||
|
||||
for (i = 0; i < pdata->num_backlights; ++i) {
|
||||
lm3533_bl_devs[i].platform_data = &pdata->backlights[i];
|
||||
lm3533_bl_devs[i].pdata_size = sizeof(pdata->backlights[i]);
|
||||
}
|
||||
|
||||
ret = mfd_add_devices(lm3533->dev, 0, lm3533_bl_devs,
|
||||
pdata->num_backlights, NULL, 0);
|
||||
if (ret) {
|
||||
dev_err(lm3533->dev, "failed to add backlight devices\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
lm3533->have_backlights = 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __devinit lm3533_device_led_init(struct lm3533 *lm3533)
|
||||
{
|
||||
struct lm3533_platform_data *pdata = lm3533->dev->platform_data;
|
||||
int i;
|
||||
int ret;
|
||||
|
||||
if (!pdata->leds || pdata->num_leds == 0)
|
||||
return 0;
|
||||
|
||||
if (pdata->num_leds > ARRAY_SIZE(lm3533_led_devs))
|
||||
pdata->num_leds = ARRAY_SIZE(lm3533_led_devs);
|
||||
|
||||
for (i = 0; i < pdata->num_leds; ++i) {
|
||||
lm3533_led_devs[i].platform_data = &pdata->leds[i];
|
||||
lm3533_led_devs[i].pdata_size = sizeof(pdata->leds[i]);
|
||||
}
|
||||
|
||||
ret = mfd_add_devices(lm3533->dev, 0, lm3533_led_devs,
|
||||
pdata->num_leds, NULL, 0);
|
||||
if (ret) {
|
||||
dev_err(lm3533->dev, "failed to add LED devices\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
lm3533->have_leds = 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __devinit lm3533_device_init(struct lm3533 *lm3533)
|
||||
{
|
||||
struct lm3533_platform_data *pdata = lm3533->dev->platform_data;
|
||||
int ret;
|
||||
|
||||
dev_dbg(lm3533->dev, "%s\n", __func__);
|
||||
|
||||
if (!pdata) {
|
||||
dev_err(lm3533->dev, "no platform data\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
lm3533->gpio_hwen = pdata->gpio_hwen;
|
||||
|
||||
dev_set_drvdata(lm3533->dev, lm3533);
|
||||
|
||||
if (gpio_is_valid(lm3533->gpio_hwen)) {
|
||||
ret = gpio_request_one(lm3533->gpio_hwen, GPIOF_OUT_INIT_LOW,
|
||||
"lm3533-hwen");
|
||||
if (ret < 0) {
|
||||
dev_err(lm3533->dev,
|
||||
"failed to request HWEN GPIO %d\n",
|
||||
lm3533->gpio_hwen);
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
lm3533_enable(lm3533);
|
||||
|
||||
lm3533_device_als_init(lm3533);
|
||||
lm3533_device_bl_init(lm3533);
|
||||
lm3533_device_led_init(lm3533);
|
||||
|
||||
ret = sysfs_create_group(&lm3533->dev->kobj, &lm3533_attribute_group);
|
||||
if (ret < 0) {
|
||||
dev_err(lm3533->dev, "failed to create sysfs attributes\n");
|
||||
goto err_unregister;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_unregister:
|
||||
mfd_remove_devices(lm3533->dev);
|
||||
lm3533_disable(lm3533);
|
||||
if (gpio_is_valid(lm3533->gpio_hwen))
|
||||
gpio_free(lm3533->gpio_hwen);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __devexit lm3533_device_exit(struct lm3533 *lm3533)
|
||||
{
|
||||
dev_dbg(lm3533->dev, "%s\n", __func__);
|
||||
|
||||
sysfs_remove_group(&lm3533->dev->kobj, &lm3533_attribute_group);
|
||||
|
||||
mfd_remove_devices(lm3533->dev);
|
||||
lm3533_disable(lm3533);
|
||||
if (gpio_is_valid(lm3533->gpio_hwen))
|
||||
gpio_free(lm3533->gpio_hwen);
|
||||
}
|
||||
|
||||
static bool lm3533_readable_register(struct device *dev, unsigned int reg)
|
||||
{
|
||||
switch (reg) {
|
||||
case 0x10 ... 0x2c:
|
||||
case 0x30 ... 0x38:
|
||||
case 0x40 ... 0x45:
|
||||
case 0x50 ... 0x57:
|
||||
case 0x60 ... 0x6e:
|
||||
case 0x70 ... 0x75:
|
||||
case 0x80 ... 0x85:
|
||||
case 0x90 ... 0x95:
|
||||
case 0xa0 ... 0xa5:
|
||||
case 0xb0 ... 0xb2:
|
||||
return true;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
static bool lm3533_volatile_register(struct device *dev, unsigned int reg)
|
||||
{
|
||||
switch (reg) {
|
||||
case 0x34: /* zone */
|
||||
case 0x37 ... 0x38: /* adc */
|
||||
case 0xb0 ... 0xb1: /* fault */
|
||||
return true;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
static bool lm3533_precious_register(struct device *dev, unsigned int reg)
|
||||
{
|
||||
switch (reg) {
|
||||
case 0x34: /* zone */
|
||||
return true;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
static struct regmap_config regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 8,
|
||||
.max_register = LM3533_REG_MAX,
|
||||
.readable_reg = lm3533_readable_register,
|
||||
.volatile_reg = lm3533_volatile_register,
|
||||
.precious_reg = lm3533_precious_register,
|
||||
};
|
||||
|
||||
static int __devinit lm3533_i2c_probe(struct i2c_client *i2c,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct lm3533 *lm3533;
|
||||
int ret;
|
||||
|
||||
dev_dbg(&i2c->dev, "%s\n", __func__);
|
||||
|
||||
lm3533 = kzalloc(sizeof(*lm3533), GFP_KERNEL);
|
||||
if (!lm3533)
|
||||
return -ENOMEM;
|
||||
|
||||
i2c_set_clientdata(i2c, lm3533);
|
||||
|
||||
lm3533->regmap = regmap_init_i2c(i2c, ®map_config);
|
||||
if (IS_ERR(lm3533->regmap)) {
|
||||
ret = PTR_ERR(lm3533->regmap);
|
||||
goto err_regmap;
|
||||
}
|
||||
|
||||
lm3533->dev = &i2c->dev;
|
||||
lm3533->irq = i2c->irq;
|
||||
|
||||
ret = lm3533_device_init(lm3533);
|
||||
if (ret)
|
||||
goto err_dev;
|
||||
|
||||
return 0;
|
||||
|
||||
err_dev:
|
||||
regmap_exit(lm3533->regmap);
|
||||
err_regmap:
|
||||
kfree(lm3533);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit lm3533_i2c_remove(struct i2c_client *i2c)
|
||||
{
|
||||
struct lm3533 *lm3533 = i2c_get_clientdata(i2c);
|
||||
|
||||
dev_dbg(&i2c->dev, "%s\n", __func__);
|
||||
|
||||
lm3533_device_exit(lm3533);
|
||||
regmap_exit(lm3533->regmap);
|
||||
|
||||
kfree(lm3533);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id lm3533_i2c_ids[] = {
|
||||
{ "lm3533", 0 },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, lm3533_i2c_ids);
|
||||
|
||||
static struct i2c_driver lm3533_i2c_driver = {
|
||||
.driver = {
|
||||
.name = "lm3533",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.id_table = lm3533_i2c_ids,
|
||||
.probe = lm3533_i2c_probe,
|
||||
.remove = __devexit_p(lm3533_i2c_remove),
|
||||
};
|
||||
|
||||
static int __init lm3533_i2c_init(void)
|
||||
{
|
||||
return i2c_add_driver(&lm3533_i2c_driver);
|
||||
}
|
||||
subsys_initcall(lm3533_i2c_init);
|
||||
|
||||
static void __exit lm3533_i2c_exit(void)
|
||||
{
|
||||
i2c_del_driver(&lm3533_i2c_driver);
|
||||
}
|
||||
module_exit(lm3533_i2c_exit);
|
||||
|
||||
MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
|
||||
MODULE_DESCRIPTION("LM3533 Core");
|
||||
MODULE_LICENSE("GPL");
|
134
drivers/mfd/lm3533-ctrlbank.c
Normal file
134
drivers/mfd/lm3533-ctrlbank.c
Normal file
@ -0,0 +1,134 @@
|
||||
/*
|
||||
* lm3533-ctrlbank.c -- LM3533 Generic Control Bank interface
|
||||
*
|
||||
* Copyright (C) 2011-2012 Texas Instruments
|
||||
*
|
||||
* Author: Johan Hovold <jhovold@gmail.com>
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <linux/device.h>
|
||||
#include <linux/module.h>
|
||||
|
||||
#include <linux/mfd/lm3533.h>
|
||||
|
||||
|
||||
#define LM3533_BRIGHTNESS_MAX 255
|
||||
#define LM3533_MAX_CURRENT_MAX 31
|
||||
#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\n", __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\n", 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\n", __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\n", cb->id);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_disable);
|
||||
|
||||
#define lm3533_ctrlbank_set(_name, _NAME) \
|
||||
int lm3533_ctrlbank_set_##_name(struct lm3533_ctrlbank *cb, u8 val) \
|
||||
{ \
|
||||
u8 reg; \
|
||||
int ret; \
|
||||
\
|
||||
if (val > LM3533_##_NAME##_MAX) \
|
||||
return -EINVAL; \
|
||||
\
|
||||
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE); \
|
||||
ret = lm3533_write(cb->lm3533, reg, val); \
|
||||
if (ret) \
|
||||
dev_err(cb->dev, "failed to set " #_name "\n"); \
|
||||
\
|
||||
return ret; \
|
||||
} \
|
||||
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_##_name);
|
||||
|
||||
#define lm3533_ctrlbank_get(_name, _NAME) \
|
||||
int lm3533_ctrlbank_get_##_name(struct lm3533_ctrlbank *cb, u8 *val) \
|
||||
{ \
|
||||
u8 reg; \
|
||||
int ret; \
|
||||
\
|
||||
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE); \
|
||||
ret = lm3533_read(cb->lm3533, reg, val); \
|
||||
if (ret) \
|
||||
dev_err(cb->dev, "failed to get " #_name "\n"); \
|
||||
\
|
||||
return ret; \
|
||||
} \
|
||||
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_##_name);
|
||||
|
||||
lm3533_ctrlbank_set(brightness, BRIGHTNESS);
|
||||
lm3533_ctrlbank_get(brightness, BRIGHTNESS);
|
||||
|
||||
/*
|
||||
* Full scale current.
|
||||
*
|
||||
* Imax = 5 + val * 0.8 mA, e.g.:
|
||||
*
|
||||
* 0 - 5 mA
|
||||
* ...
|
||||
* 19 - 20.2 mA (default)
|
||||
* ...
|
||||
* 31 - 29.8 mA
|
||||
*/
|
||||
lm3533_ctrlbank_set(max_current, MAX_CURRENT);
|
||||
lm3533_ctrlbank_get(max_current, MAX_CURRENT);
|
||||
|
||||
/*
|
||||
* 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
|
||||
*/
|
||||
lm3533_ctrlbank_set(pwm, PWM);
|
||||
lm3533_ctrlbank_get(pwm, PWM);
|
||||
|
||||
|
||||
MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
|
||||
MODULE_DESCRIPTION("LM3533 Control Bank interface");
|
||||
MODULE_LICENSE("GPL");
|
89
include/linux/mfd/lm3533.h
Normal file
89
include/linux/mfd/lm3533.h
Normal file
@ -0,0 +1,89 @@
|
||||
/*
|
||||
* lm3533.h -- LM3533 interface
|
||||
*
|
||||
* Copyright (C) 2011-2012 Texas Instruments
|
||||
*
|
||||
* Author: Johan Hovold <jhovold@gmail.com>
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef __LINUX_MFD_LM3533_H
|
||||
#define __LINUX_MFD_LM3533_H
|
||||
|
||||
#define LM3533_ATTR_RO(_name) \
|
||||
DEVICE_ATTR(_name, S_IRUGO, show_##_name, NULL)
|
||||
#define LM3533_ATTR_RW(_name) \
|
||||
DEVICE_ATTR(_name, S_IRUGO | S_IWUSR , show_##_name, store_##_name)
|
||||
|
||||
struct device;
|
||||
struct regmap;
|
||||
|
||||
struct lm3533 {
|
||||
struct device *dev;
|
||||
|
||||
struct regmap *regmap;
|
||||
|
||||
int gpio_hwen;
|
||||
int irq;
|
||||
|
||||
unsigned have_als:1;
|
||||
unsigned have_backlights:1;
|
||||
unsigned have_leds:1;
|
||||
};
|
||||
|
||||
struct lm3533_ctrlbank {
|
||||
struct lm3533 *lm3533;
|
||||
struct device *dev;
|
||||
int id;
|
||||
};
|
||||
|
||||
struct lm3533_als_platform_data {
|
||||
unsigned pwm_mode:1; /* PWM input mode (default analog) */
|
||||
};
|
||||
|
||||
struct lm3533_bl_platform_data {
|
||||
char *name;
|
||||
u8 default_brightness; /* 0 - 255 */
|
||||
u8 max_current; /* 0 - 31 */
|
||||
u8 pwm; /* 0 - 0x3f */
|
||||
};
|
||||
|
||||
struct lm3533_led_platform_data {
|
||||
char *name;
|
||||
const char *default_trigger;
|
||||
u8 max_current; /* 0 - 31 */
|
||||
u8 pwm; /* 0 - 0x3f */
|
||||
};
|
||||
|
||||
struct lm3533_platform_data {
|
||||
int gpio_hwen;
|
||||
|
||||
struct lm3533_als_platform_data *als;
|
||||
|
||||
struct lm3533_bl_platform_data *backlights;
|
||||
int num_backlights;
|
||||
|
||||
struct lm3533_led_platform_data *leds;
|
||||
int num_leds;
|
||||
};
|
||||
|
||||
extern int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb);
|
||||
extern int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb);
|
||||
|
||||
extern int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u8 val);
|
||||
extern int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u8 *val);
|
||||
extern int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u8 val);
|
||||
extern int lm3533_ctrlbank_get_max_current(struct lm3533_ctrlbank *cb,
|
||||
u8 *val);
|
||||
extern int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val);
|
||||
extern int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u8 *val);
|
||||
|
||||
extern int lm3533_read(struct lm3533 *lm3533, u8 reg, u8 *val);
|
||||
extern int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val);
|
||||
extern int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask);
|
||||
|
||||
#endif /* __LINUX_MFD_LM3533_H */
|
Loading…
Reference in New Issue
Block a user