mfd: Add AAT2870 mfd driver
Add mfd core driver for AnalogicTech AAT2870. The AAT2870 is communication through I2C and contains backlight and regulator components. Signed-off-by: Jin Park <jinyoungp@nvidia.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Jin Park
Samuel Ortiz
parent
7785bf11f3
commit
09d6292bef
4 changed files with 727 additions and 0 deletions
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@ -760,6 +760,16 @@ config MFD_PM8XXX_IRQ
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config TPS65911_COMPARATOR
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tristate
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config MFD_AAT2870_CORE
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bool "Support for the AnalogicTech AAT2870"
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select MFD_CORE
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depends on I2C=y && GPIOLIB
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help
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If you say yes here you get support for the AAT2870.
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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
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functionality of the device.
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endif # MFD_SUPPORT
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menu "Multimedia Capabilities Port drivers"
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@ -101,3 +101,4 @@ obj-$(CONFIG_MFD_OMAP_USB_HOST) += omap-usb-host.o
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obj-$(CONFIG_MFD_PM8921_CORE) += pm8921-core.o
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obj-$(CONFIG_MFD_PM8XXX_IRQ) += pm8xxx-irq.o
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obj-$(CONFIG_TPS65911_COMPARATOR) += tps65911-comparator.o
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obj-$(CONFIG_MFD_AAT2870_CORE) += aat2870-core.o
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535
drivers/mfd/aat2870-core.c
Normal file
535
drivers/mfd/aat2870-core.c
Normal file
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@ -0,0 +1,535 @@
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/*
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* linux/drivers/mfd/aat2870-core.c
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*
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* Copyright (c) 2011, NVIDIA Corporation.
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* Author: Jin Park <jinyoungp@nvidia.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/debugfs.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/i2c.h>
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/aat2870.h>
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#include <linux/regulator/machine.h>
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static struct aat2870_register aat2870_regs[AAT2870_REG_NUM] = {
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/* readable, writeable, value */
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{ 0, 1, 0x00 }, /* 0x00 AAT2870_BL_CH_EN */
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{ 0, 1, 0x16 }, /* 0x01 AAT2870_BLM */
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{ 0, 1, 0x16 }, /* 0x02 AAT2870_BLS */
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{ 0, 1, 0x56 }, /* 0x03 AAT2870_BL1 */
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{ 0, 1, 0x56 }, /* 0x04 AAT2870_BL2 */
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{ 0, 1, 0x56 }, /* 0x05 AAT2870_BL3 */
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{ 0, 1, 0x56 }, /* 0x06 AAT2870_BL4 */
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{ 0, 1, 0x56 }, /* 0x07 AAT2870_BL5 */
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{ 0, 1, 0x56 }, /* 0x08 AAT2870_BL6 */
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{ 0, 1, 0x56 }, /* 0x09 AAT2870_BL7 */
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{ 0, 1, 0x56 }, /* 0x0A AAT2870_BL8 */
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{ 0, 1, 0x00 }, /* 0x0B AAT2870_FLR */
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{ 0, 1, 0x03 }, /* 0x0C AAT2870_FM */
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{ 0, 1, 0x03 }, /* 0x0D AAT2870_FS */
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{ 0, 1, 0x10 }, /* 0x0E AAT2870_ALS_CFG0 */
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{ 0, 1, 0x06 }, /* 0x0F AAT2870_ALS_CFG1 */
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{ 0, 1, 0x00 }, /* 0x10 AAT2870_ALS_CFG2 */
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{ 1, 0, 0x00 }, /* 0x11 AAT2870_AMB */
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{ 0, 1, 0x00 }, /* 0x12 AAT2870_ALS0 */
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{ 0, 1, 0x00 }, /* 0x13 AAT2870_ALS1 */
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{ 0, 1, 0x00 }, /* 0x14 AAT2870_ALS2 */
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{ 0, 1, 0x00 }, /* 0x15 AAT2870_ALS3 */
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{ 0, 1, 0x00 }, /* 0x16 AAT2870_ALS4 */
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{ 0, 1, 0x00 }, /* 0x17 AAT2870_ALS5 */
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{ 0, 1, 0x00 }, /* 0x18 AAT2870_ALS6 */
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{ 0, 1, 0x00 }, /* 0x19 AAT2870_ALS7 */
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{ 0, 1, 0x00 }, /* 0x1A AAT2870_ALS8 */
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{ 0, 1, 0x00 }, /* 0x1B AAT2870_ALS9 */
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{ 0, 1, 0x00 }, /* 0x1C AAT2870_ALSA */
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{ 0, 1, 0x00 }, /* 0x1D AAT2870_ALSB */
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{ 0, 1, 0x00 }, /* 0x1E AAT2870_ALSC */
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{ 0, 1, 0x00 }, /* 0x1F AAT2870_ALSD */
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{ 0, 1, 0x00 }, /* 0x20 AAT2870_ALSE */
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{ 0, 1, 0x00 }, /* 0x21 AAT2870_ALSF */
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{ 0, 1, 0x00 }, /* 0x22 AAT2870_SUB_SET */
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{ 0, 1, 0x00 }, /* 0x23 AAT2870_SUB_CTRL */
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{ 0, 1, 0x00 }, /* 0x24 AAT2870_LDO_AB */
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{ 0, 1, 0x00 }, /* 0x25 AAT2870_LDO_CD */
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{ 0, 1, 0x00 }, /* 0x26 AAT2870_LDO_EN */
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};
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static struct mfd_cell aat2870_devs[] = {
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{
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.name = "aat2870-backlight",
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.id = AAT2870_ID_BL,
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.pdata_size = sizeof(struct aat2870_bl_platform_data),
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},
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{
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.name = "aat2870-regulator",
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.id = AAT2870_ID_LDOA,
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.pdata_size = sizeof(struct regulator_init_data),
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},
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{
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.name = "aat2870-regulator",
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.id = AAT2870_ID_LDOB,
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.pdata_size = sizeof(struct regulator_init_data),
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},
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{
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.name = "aat2870-regulator",
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.id = AAT2870_ID_LDOC,
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.pdata_size = sizeof(struct regulator_init_data),
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},
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{
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.name = "aat2870-regulator",
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.id = AAT2870_ID_LDOD,
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.pdata_size = sizeof(struct regulator_init_data),
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},
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};
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static int __aat2870_read(struct aat2870_data *aat2870, u8 addr, u8 *val)
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{
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int ret;
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if (addr >= AAT2870_REG_NUM) {
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dev_err(aat2870->dev, "Invalid address, 0x%02x\n", addr);
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return -EINVAL;
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}
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if (!aat2870->reg_cache[addr].readable) {
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*val = aat2870->reg_cache[addr].value;
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goto out;
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}
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ret = i2c_master_send(aat2870->client, &addr, 1);
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if (ret < 0)
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return ret;
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if (ret != 1)
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return -EIO;
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ret = i2c_master_recv(aat2870->client, val, 1);
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if (ret < 0)
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return ret;
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if (ret != 1)
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return -EIO;
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out:
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dev_dbg(aat2870->dev, "read: addr=0x%02x, val=0x%02x\n", addr, *val);
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return 0;
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}
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static int __aat2870_write(struct aat2870_data *aat2870, u8 addr, u8 val)
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{
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u8 msg[2];
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int ret;
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if (addr >= AAT2870_REG_NUM) {
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dev_err(aat2870->dev, "Invalid address, 0x%02x\n", addr);
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return -EINVAL;
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}
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if (!aat2870->reg_cache[addr].writeable) {
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dev_err(aat2870->dev, "Address 0x%02x is not writeable\n",
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addr);
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return -EINVAL;
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}
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msg[0] = addr;
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msg[1] = val;
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ret = i2c_master_send(aat2870->client, msg, 2);
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if (ret < 0)
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return ret;
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if (ret != 2)
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return -EIO;
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aat2870->reg_cache[addr].value = val;
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dev_dbg(aat2870->dev, "write: addr=0x%02x, val=0x%02x\n", addr, val);
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return 0;
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}
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static int aat2870_read(struct aat2870_data *aat2870, u8 addr, u8 *val)
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{
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int ret;
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mutex_lock(&aat2870->io_lock);
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ret = __aat2870_read(aat2870, addr, val);
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mutex_unlock(&aat2870->io_lock);
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return ret;
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}
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static int aat2870_write(struct aat2870_data *aat2870, u8 addr, u8 val)
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{
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int ret;
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mutex_lock(&aat2870->io_lock);
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ret = __aat2870_write(aat2870, addr, val);
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mutex_unlock(&aat2870->io_lock);
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return ret;
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}
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static int aat2870_update(struct aat2870_data *aat2870, u8 addr, u8 mask,
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u8 val)
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{
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int change;
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u8 old_val, new_val;
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int ret;
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mutex_lock(&aat2870->io_lock);
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ret = __aat2870_read(aat2870, addr, &old_val);
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if (ret)
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goto out_unlock;
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new_val = (old_val & ~mask) | (val & mask);
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change = old_val != new_val;
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if (change)
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ret = __aat2870_write(aat2870, addr, new_val);
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out_unlock:
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mutex_unlock(&aat2870->io_lock);
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return ret;
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}
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static inline void aat2870_enable(struct aat2870_data *aat2870)
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{
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if (aat2870->en_pin >= 0)
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gpio_set_value(aat2870->en_pin, 1);
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aat2870->is_enable = 1;
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}
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static inline void aat2870_disable(struct aat2870_data *aat2870)
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{
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if (aat2870->en_pin >= 0)
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gpio_set_value(aat2870->en_pin, 0);
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aat2870->is_enable = 0;
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}
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#ifdef CONFIG_DEBUG_FS
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static ssize_t aat2870_dump_reg(struct aat2870_data *aat2870, char *buf)
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{
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u8 addr, val;
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ssize_t count = 0;
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int ret;
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count += sprintf(buf, "aat2870 registers\n");
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for (addr = 0; addr < AAT2870_REG_NUM; addr++) {
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count += sprintf(buf + count, "0x%02x: ", addr);
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if (count >= PAGE_SIZE - 1)
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break;
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ret = aat2870->read(aat2870, addr, &val);
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if (ret == 0)
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count += snprintf(buf + count, PAGE_SIZE - count,
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"0x%02x", val);
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else
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count += snprintf(buf + count, PAGE_SIZE - count,
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"<read fail: %d>", ret);
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if (count >= PAGE_SIZE - 1)
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break;
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count += snprintf(buf + count, PAGE_SIZE - count, "\n");
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if (count >= PAGE_SIZE - 1)
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break;
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}
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/* Truncate count; min() would cause a warning */
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if (count >= PAGE_SIZE)
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count = PAGE_SIZE - 1;
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return count;
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}
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static int aat2870_reg_open_file(struct inode *inode, struct file *file)
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{
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file->private_data = inode->i_private;
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return 0;
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}
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static ssize_t aat2870_reg_read_file(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct aat2870_data *aat2870 = file->private_data;
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char *buf;
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ssize_t ret;
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buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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ret = aat2870_dump_reg(aat2870, buf);
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if (ret >= 0)
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ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
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kfree(buf);
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return ret;
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}
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static ssize_t aat2870_reg_write_file(struct file *file,
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const char __user *user_buf, size_t count,
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loff_t *ppos)
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{
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struct aat2870_data *aat2870 = file->private_data;
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char buf[32];
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int buf_size;
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char *start = buf;
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unsigned long addr, val;
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int ret;
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buf_size = min(count, (sizeof(buf)-1));
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if (copy_from_user(buf, user_buf, buf_size)) {
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dev_err(aat2870->dev, "Failed to copy from user\n");
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return -EFAULT;
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}
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buf[buf_size] = 0;
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while (*start == ' ')
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start++;
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addr = simple_strtoul(start, &start, 16);
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if (addr >= AAT2870_REG_NUM) {
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dev_err(aat2870->dev, "Invalid address, 0x%lx\n", addr);
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return -EINVAL;
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}
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while (*start == ' ')
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start++;
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if (strict_strtoul(start, 16, &val))
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return -EINVAL;
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ret = aat2870->write(aat2870, (u8)addr, (u8)val);
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if (ret)
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return ret;
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return buf_size;
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}
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static const struct file_operations aat2870_reg_fops = {
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.open = aat2870_reg_open_file,
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.read = aat2870_reg_read_file,
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.write = aat2870_reg_write_file,
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};
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static void aat2870_init_debugfs(struct aat2870_data *aat2870)
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{
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aat2870->dentry_root = debugfs_create_dir("aat2870", NULL);
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if (!aat2870->dentry_root) {
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dev_warn(aat2870->dev,
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"Failed to create debugfs root directory\n");
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return;
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}
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aat2870->dentry_reg = debugfs_create_file("regs", 0644,
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aat2870->dentry_root,
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aat2870, &aat2870_reg_fops);
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if (!aat2870->dentry_reg)
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dev_warn(aat2870->dev,
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"Failed to create debugfs register file\n");
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}
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static void aat2870_uninit_debugfs(struct aat2870_data *aat2870)
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{
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debugfs_remove_recursive(aat2870->dentry_root);
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}
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#else
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static inline void aat2870_init_debugfs(struct aat2870_data *aat2870)
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{
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}
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static inline void aat2870_uninit_debugfs(struct aat2870_data *aat2870)
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{
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}
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#endif /* CONFIG_DEBUG_FS */
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static int aat2870_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct aat2870_platform_data *pdata = client->dev.platform_data;
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struct aat2870_data *aat2870;
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int i, j;
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int ret = 0;
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aat2870 = kzalloc(sizeof(struct aat2870_data), GFP_KERNEL);
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if (!aat2870) {
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dev_err(&client->dev,
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"Failed to allocate memory for aat2870\n");
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ret = -ENOMEM;
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goto out;
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}
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aat2870->dev = &client->dev;
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dev_set_drvdata(aat2870->dev, aat2870);
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aat2870->client = client;
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i2c_set_clientdata(client, aat2870);
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aat2870->reg_cache = aat2870_regs;
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if (pdata->en_pin < 0)
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aat2870->en_pin = -1;
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else
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aat2870->en_pin = pdata->en_pin;
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aat2870->init = pdata->init;
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aat2870->uninit = pdata->uninit;
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aat2870->read = aat2870_read;
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aat2870->write = aat2870_write;
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aat2870->update = aat2870_update;
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mutex_init(&aat2870->io_lock);
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if (aat2870->init)
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aat2870->init(aat2870);
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if (aat2870->en_pin >= 0) {
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ret = gpio_request(aat2870->en_pin, "aat2870-en");
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if (ret < 0) {
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dev_err(&client->dev,
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"Failed to request GPIO %d\n", aat2870->en_pin);
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goto out_kfree;
|
||||
}
|
||||
gpio_direction_output(aat2870->en_pin, 1);
|
||||
}
|
||||
|
||||
aat2870_enable(aat2870);
|
||||
|
||||
for (i = 0; i < pdata->num_subdevs; i++) {
|
||||
for (j = 0; j < ARRAY_SIZE(aat2870_devs); j++) {
|
||||
if ((pdata->subdevs[i].id == aat2870_devs[j].id) &&
|
||||
!strcmp(pdata->subdevs[i].name,
|
||||
aat2870_devs[j].name)) {
|
||||
aat2870_devs[j].platform_data =
|
||||
pdata->subdevs[i].platform_data;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ret = mfd_add_devices(aat2870->dev, 0, aat2870_devs,
|
||||
ARRAY_SIZE(aat2870_devs), NULL, 0);
|
||||
if (ret != 0) {
|
||||
dev_err(aat2870->dev, "Failed to add subdev: %d\n", ret);
|
||||
goto out_disable;
|
||||
}
|
||||
|
||||
aat2870_init_debugfs(aat2870);
|
||||
|
||||
return 0;
|
||||
|
||||
out_disable:
|
||||
aat2870_disable(aat2870);
|
||||
if (aat2870->en_pin >= 0)
|
||||
gpio_free(aat2870->en_pin);
|
||||
out_kfree:
|
||||
kfree(aat2870);
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int aat2870_i2c_remove(struct i2c_client *client)
|
||||
{
|
||||
struct aat2870_data *aat2870 = i2c_get_clientdata(client);
|
||||
|
||||
aat2870_uninit_debugfs(aat2870);
|
||||
|
||||
mfd_remove_devices(aat2870->dev);
|
||||
aat2870_disable(aat2870);
|
||||
if (aat2870->en_pin >= 0)
|
||||
gpio_free(aat2870->en_pin);
|
||||
if (aat2870->uninit)
|
||||
aat2870->uninit(aat2870);
|
||||
kfree(aat2870);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int aat2870_i2c_suspend(struct i2c_client *client, pm_message_t state)
|
||||
{
|
||||
struct aat2870_data *aat2870 = i2c_get_clientdata(client);
|
||||
|
||||
aat2870_disable(aat2870);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int aat2870_i2c_resume(struct i2c_client *client)
|
||||
{
|
||||
struct aat2870_data *aat2870 = i2c_get_clientdata(client);
|
||||
struct aat2870_register *reg = NULL;
|
||||
int i;
|
||||
|
||||
aat2870_enable(aat2870);
|
||||
|
||||
/* restore registers */
|
||||
for (i = 0; i < AAT2870_REG_NUM; i++) {
|
||||
reg = &aat2870->reg_cache[i];
|
||||
if (reg->writeable)
|
||||
aat2870->write(aat2870, i, reg->value);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
#define aat2870_i2c_suspend NULL
|
||||
#define aat2870_i2c_resume NULL
|
||||
#endif /* CONFIG_PM */
|
||||
|
||||
static struct i2c_device_id aat2870_i2c_id_table[] = {
|
||||
{ "aat2870", 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, aat2870_i2c_id_table);
|
||||
|
||||
static struct i2c_driver aat2870_i2c_driver = {
|
||||
.driver = {
|
||||
.name = "aat2870",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = aat2870_i2c_probe,
|
||||
.remove = aat2870_i2c_remove,
|
||||
.suspend = aat2870_i2c_suspend,
|
||||
.resume = aat2870_i2c_resume,
|
||||
.id_table = aat2870_i2c_id_table,
|
||||
};
|
||||
|
||||
static int __init aat2870_init(void)
|
||||
{
|
||||
return i2c_add_driver(&aat2870_i2c_driver);
|
||||
}
|
||||
subsys_initcall(aat2870_init);
|
||||
|
||||
static void __exit aat2870_exit(void)
|
||||
{
|
||||
i2c_del_driver(&aat2870_i2c_driver);
|
||||
}
|
||||
module_exit(aat2870_exit);
|
||||
|
||||
MODULE_DESCRIPTION("Core support for the AnalogicTech AAT2870");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Jin Park <jinyoungp@nvidia.com>");
|
||||
181
include/linux/mfd/aat2870.h
Normal file
181
include/linux/mfd/aat2870.h
Normal file
|
|
@ -0,0 +1,181 @@
|
|||
/*
|
||||
* linux/include/linux/mfd/aat2870.h
|
||||
*
|
||||
* Copyright (c) 2011, NVIDIA Corporation.
|
||||
* Author: Jin Park <jinyoungp@nvidia.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* version 2 as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
||||
* 02110-1301 USA
|
||||
*/
|
||||
|
||||
#ifndef __LINUX_MFD_AAT2870_H
|
||||
#define __LINUX_MFD_AAT2870_H
|
||||
|
||||
#include <linux/debugfs.h>
|
||||
#include <linux/i2c.h>
|
||||
|
||||
/* Register offsets */
|
||||
#define AAT2870_BL_CH_EN 0x00
|
||||
#define AAT2870_BLM 0x01
|
||||
#define AAT2870_BLS 0x02
|
||||
#define AAT2870_BL1 0x03
|
||||
#define AAT2870_BL2 0x04
|
||||
#define AAT2870_BL3 0x05
|
||||
#define AAT2870_BL4 0x06
|
||||
#define AAT2870_BL5 0x07
|
||||
#define AAT2870_BL6 0x08
|
||||
#define AAT2870_BL7 0x09
|
||||
#define AAT2870_BL8 0x0A
|
||||
#define AAT2870_FLR 0x0B
|
||||
#define AAT2870_FM 0x0C
|
||||
#define AAT2870_FS 0x0D
|
||||
#define AAT2870_ALS_CFG0 0x0E
|
||||
#define AAT2870_ALS_CFG1 0x0F
|
||||
#define AAT2870_ALS_CFG2 0x10
|
||||
#define AAT2870_AMB 0x11
|
||||
#define AAT2870_ALS0 0x12
|
||||
#define AAT2870_ALS1 0x13
|
||||
#define AAT2870_ALS2 0x14
|
||||
#define AAT2870_ALS3 0x15
|
||||
#define AAT2870_ALS4 0x16
|
||||
#define AAT2870_ALS5 0x17
|
||||
#define AAT2870_ALS6 0x18
|
||||
#define AAT2870_ALS7 0x19
|
||||
#define AAT2870_ALS8 0x1A
|
||||
#define AAT2870_ALS9 0x1B
|
||||
#define AAT2870_ALSA 0x1C
|
||||
#define AAT2870_ALSB 0x1D
|
||||
#define AAT2870_ALSC 0x1E
|
||||
#define AAT2870_ALSD 0x1F
|
||||
#define AAT2870_ALSE 0x20
|
||||
#define AAT2870_ALSF 0x21
|
||||
#define AAT2870_SUB_SET 0x22
|
||||
#define AAT2870_SUB_CTRL 0x23
|
||||
#define AAT2870_LDO_AB 0x24
|
||||
#define AAT2870_LDO_CD 0x25
|
||||
#define AAT2870_LDO_EN 0x26
|
||||
#define AAT2870_REG_NUM 0x27
|
||||
|
||||
/* Device IDs */
|
||||
enum aat2870_id {
|
||||
AAT2870_ID_BL,
|
||||
AAT2870_ID_LDOA,
|
||||
AAT2870_ID_LDOB,
|
||||
AAT2870_ID_LDOC,
|
||||
AAT2870_ID_LDOD
|
||||
};
|
||||
|
||||
/* Backlight channels */
|
||||
#define AAT2870_BL_CH1 0x01
|
||||
#define AAT2870_BL_CH2 0x02
|
||||
#define AAT2870_BL_CH3 0x04
|
||||
#define AAT2870_BL_CH4 0x08
|
||||
#define AAT2870_BL_CH5 0x10
|
||||
#define AAT2870_BL_CH6 0x20
|
||||
#define AAT2870_BL_CH7 0x40
|
||||
#define AAT2870_BL_CH8 0x80
|
||||
#define AAT2870_BL_CH_ALL 0xFF
|
||||
|
||||
/* Backlight current magnitude (mA) */
|
||||
enum aat2870_current {
|
||||
AAT2870_CURRENT_0_45,
|
||||
AAT2870_CURRENT_0_90,
|
||||
AAT2870_CURRENT_1_80,
|
||||
AAT2870_CURRENT_2_70,
|
||||
AAT2870_CURRENT_3_60,
|
||||
AAT2870_CURRENT_4_50,
|
||||
AAT2870_CURRENT_5_40,
|
||||
AAT2870_CURRENT_6_30,
|
||||
AAT2870_CURRENT_7_20,
|
||||
AAT2870_CURRENT_8_10,
|
||||
AAT2870_CURRENT_9_00,
|
||||
AAT2870_CURRENT_9_90,
|
||||
AAT2870_CURRENT_10_8,
|
||||
AAT2870_CURRENT_11_7,
|
||||
AAT2870_CURRENT_12_6,
|
||||
AAT2870_CURRENT_13_5,
|
||||
AAT2870_CURRENT_14_4,
|
||||
AAT2870_CURRENT_15_3,
|
||||
AAT2870_CURRENT_16_2,
|
||||
AAT2870_CURRENT_17_1,
|
||||
AAT2870_CURRENT_18_0,
|
||||
AAT2870_CURRENT_18_9,
|
||||
AAT2870_CURRENT_19_8,
|
||||
AAT2870_CURRENT_20_7,
|
||||
AAT2870_CURRENT_21_6,
|
||||
AAT2870_CURRENT_22_5,
|
||||
AAT2870_CURRENT_23_4,
|
||||
AAT2870_CURRENT_24_3,
|
||||
AAT2870_CURRENT_25_2,
|
||||
AAT2870_CURRENT_26_1,
|
||||
AAT2870_CURRENT_27_0,
|
||||
AAT2870_CURRENT_27_9
|
||||
};
|
||||
|
||||
struct aat2870_register {
|
||||
bool readable;
|
||||
bool writeable;
|
||||
u8 value;
|
||||
};
|
||||
|
||||
struct aat2870_data {
|
||||
struct device *dev;
|
||||
struct i2c_client *client;
|
||||
|
||||
struct mutex io_lock;
|
||||
struct aat2870_register *reg_cache; /* register cache */
|
||||
int en_pin; /* enable GPIO pin (if < 0, ignore this value) */
|
||||
bool is_enable;
|
||||
|
||||
/* init and uninit for platform specified */
|
||||
int (*init)(struct aat2870_data *aat2870);
|
||||
void (*uninit)(struct aat2870_data *aat2870);
|
||||
|
||||
/* i2c io funcntions */
|
||||
int (*read)(struct aat2870_data *aat2870, u8 addr, u8 *val);
|
||||
int (*write)(struct aat2870_data *aat2870, u8 addr, u8 val);
|
||||
int (*update)(struct aat2870_data *aat2870, u8 addr, u8 mask, u8 val);
|
||||
|
||||
/* for debugfs */
|
||||
struct dentry *dentry_root;
|
||||
struct dentry *dentry_reg;
|
||||
};
|
||||
|
||||
struct aat2870_subdev_info {
|
||||
int id;
|
||||
const char *name;
|
||||
void *platform_data;
|
||||
};
|
||||
|
||||
struct aat2870_platform_data {
|
||||
int en_pin; /* enable GPIO pin (if < 0, ignore this value) */
|
||||
|
||||
struct aat2870_subdev_info *subdevs;
|
||||
int num_subdevs;
|
||||
|
||||
/* init and uninit for platform specified */
|
||||
int (*init)(struct aat2870_data *aat2870);
|
||||
void (*uninit)(struct aat2870_data *aat2870);
|
||||
};
|
||||
|
||||
struct aat2870_bl_platform_data {
|
||||
/* backlight channels, default is AAT2870_BL_CH_ALL */
|
||||
int channels;
|
||||
/* backlight current magnitude, default is AAT2870_CURRENT_27_9 */
|
||||
int max_current;
|
||||
/* maximum brightness, default is 255 */
|
||||
int max_brightness;
|
||||
};
|
||||
|
||||
#endif /* __LINUX_MFD_AAT2870_H */
|
||||
Loading…
Reference in a new issue