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929 lines
20 KiB
929 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
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* Copyright (C) 2007-2010 ST-Ericsson |
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* Low-level core for exclusive access to the AB3100 IC on the I2C bus |
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* and some basic chip-configuration. |
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* Author: Linus Walleij <[email protected]> |
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*/ |
|
|
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#include <linux/i2c.h> |
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#include <linux/mutex.h> |
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#include <linux/list.h> |
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#include <linux/notifier.h> |
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#include <linux/slab.h> |
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#include <linux/err.h> |
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#include <linux/init.h> |
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#include <linux/platform_device.h> |
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#include <linux/device.h> |
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#include <linux/interrupt.h> |
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#include <linux/random.h> |
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#include <linux/debugfs.h> |
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#include <linux/seq_file.h> |
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#include <linux/uaccess.h> |
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#include <linux/mfd/core.h> |
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#include <linux/mfd/ab3100.h> |
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#include <linux/mfd/abx500.h> |
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|
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/* These are the only registers inside AB3100 used in this main file */ |
|
|
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/* Interrupt event registers */ |
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#define AB3100_EVENTA1 0x21 |
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#define AB3100_EVENTA2 0x22 |
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#define AB3100_EVENTA3 0x23 |
|
|
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/* AB3100 DAC converter registers */ |
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#define AB3100_DIS 0x00 |
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#define AB3100_D0C 0x01 |
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#define AB3100_D1C 0x02 |
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#define AB3100_D2C 0x03 |
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#define AB3100_D3C 0x04 |
|
|
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/* Chip ID register */ |
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#define AB3100_CID 0x20 |
|
|
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/* AB3100 interrupt registers */ |
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#define AB3100_IMRA1 0x24 |
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#define AB3100_IMRA2 0x25 |
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#define AB3100_IMRA3 0x26 |
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#define AB3100_IMRB1 0x2B |
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#define AB3100_IMRB2 0x2C |
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#define AB3100_IMRB3 0x2D |
|
|
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/* System Power Monitoring and control registers */ |
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#define AB3100_MCA 0x2E |
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#define AB3100_MCB 0x2F |
|
|
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/* SIM power up */ |
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#define AB3100_SUP 0x50 |
|
|
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/* |
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* I2C communication |
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* |
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* The AB3100 is usually assigned address 0x48 (7-bit) |
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* The chip is defined in the platform i2c_board_data section. |
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*/ |
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static int ab3100_get_chip_id(struct device *dev) |
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{ |
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struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); |
|
|
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return (int)ab3100->chip_id; |
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} |
|
|
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static int ab3100_set_register_interruptible(struct ab3100 *ab3100, |
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u8 reg, u8 regval) |
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{ |
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u8 regandval[2] = {reg, regval}; |
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int err; |
|
|
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err = mutex_lock_interruptible(&ab3100->access_mutex); |
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if (err) |
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return err; |
|
|
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/* |
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* A two-byte write message with the first byte containing the register |
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* number and the second byte containing the value to be written |
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* effectively sets a register in the AB3100. |
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*/ |
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err = i2c_master_send(ab3100->i2c_client, regandval, 2); |
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if (err < 0) { |
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dev_err(ab3100->dev, |
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"write error (write register): %d\n", |
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err); |
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} else if (err != 2) { |
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dev_err(ab3100->dev, |
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"write error (write register)\n" |
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" %d bytes transferred (expected 2)\n", |
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err); |
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err = -EIO; |
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} else { |
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/* All is well */ |
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err = 0; |
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} |
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mutex_unlock(&ab3100->access_mutex); |
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return err; |
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} |
|
|
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static int set_register_interruptible(struct device *dev, |
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u8 bank, u8 reg, u8 value) |
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{ |
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struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); |
|
|
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return ab3100_set_register_interruptible(ab3100, reg, value); |
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} |
|
|
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/* |
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* The test registers exist at an I2C bus address up one |
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* from the ordinary base. They are not supposed to be used |
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* in production code, but sometimes you have to do that |
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* anyway. It's currently only used from this file so declare |
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* it static and do not export. |
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*/ |
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static int ab3100_set_test_register_interruptible(struct ab3100 *ab3100, |
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u8 reg, u8 regval) |
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{ |
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u8 regandval[2] = {reg, regval}; |
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int err; |
|
|
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err = mutex_lock_interruptible(&ab3100->access_mutex); |
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if (err) |
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return err; |
|
|
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err = i2c_master_send(ab3100->testreg_client, regandval, 2); |
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if (err < 0) { |
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dev_err(ab3100->dev, |
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"write error (write test register): %d\n", |
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err); |
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} else if (err != 2) { |
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dev_err(ab3100->dev, |
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"write error (write test register)\n" |
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" %d bytes transferred (expected 2)\n", |
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err); |
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err = -EIO; |
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} else { |
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/* All is well */ |
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err = 0; |
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} |
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mutex_unlock(&ab3100->access_mutex); |
|
|
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return err; |
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} |
|
|
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static int ab3100_get_register_interruptible(struct ab3100 *ab3100, |
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u8 reg, u8 *regval) |
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{ |
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int err; |
|
|
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err = mutex_lock_interruptible(&ab3100->access_mutex); |
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if (err) |
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return err; |
|
|
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/* |
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* AB3100 require an I2C "stop" command between each message, else |
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* it will not work. The only way of achieveing this with the |
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* message transport layer is to send the read and write messages |
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* separately. |
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*/ |
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err = i2c_master_send(ab3100->i2c_client, ®, 1); |
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if (err < 0) { |
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dev_err(ab3100->dev, |
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"write error (send register address): %d\n", |
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err); |
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goto get_reg_out_unlock; |
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} else if (err != 1) { |
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dev_err(ab3100->dev, |
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"write error (send register address)\n" |
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" %d bytes transferred (expected 1)\n", |
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err); |
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err = -EIO; |
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goto get_reg_out_unlock; |
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} else { |
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/* All is well */ |
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err = 0; |
|
} |
|
|
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err = i2c_master_recv(ab3100->i2c_client, regval, 1); |
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if (err < 0) { |
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dev_err(ab3100->dev, |
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"write error (read register): %d\n", |
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err); |
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goto get_reg_out_unlock; |
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} else if (err != 1) { |
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dev_err(ab3100->dev, |
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"write error (read register)\n" |
|
" %d bytes transferred (expected 1)\n", |
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err); |
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err = -EIO; |
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goto get_reg_out_unlock; |
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} else { |
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/* All is well */ |
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err = 0; |
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} |
|
|
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get_reg_out_unlock: |
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mutex_unlock(&ab3100->access_mutex); |
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return err; |
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} |
|
|
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static int get_register_interruptible(struct device *dev, u8 bank, u8 reg, |
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u8 *value) |
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{ |
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struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); |
|
|
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return ab3100_get_register_interruptible(ab3100, reg, value); |
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} |
|
|
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static int ab3100_get_register_page_interruptible(struct ab3100 *ab3100, |
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u8 first_reg, u8 *regvals, u8 numregs) |
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{ |
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int err; |
|
|
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if (ab3100->chip_id == 0xa0 || |
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ab3100->chip_id == 0xa1) |
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/* These don't support paged reads */ |
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return -EIO; |
|
|
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err = mutex_lock_interruptible(&ab3100->access_mutex); |
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if (err) |
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return err; |
|
|
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/* |
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* Paged read also require an I2C "stop" command. |
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*/ |
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err = i2c_master_send(ab3100->i2c_client, &first_reg, 1); |
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if (err < 0) { |
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dev_err(ab3100->dev, |
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"write error (send first register address): %d\n", |
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err); |
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goto get_reg_page_out_unlock; |
|
} else if (err != 1) { |
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dev_err(ab3100->dev, |
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"write error (send first register address)\n" |
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" %d bytes transferred (expected 1)\n", |
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err); |
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err = -EIO; |
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goto get_reg_page_out_unlock; |
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} |
|
|
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err = i2c_master_recv(ab3100->i2c_client, regvals, numregs); |
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if (err < 0) { |
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dev_err(ab3100->dev, |
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"write error (read register page): %d\n", |
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err); |
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goto get_reg_page_out_unlock; |
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} else if (err != numregs) { |
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dev_err(ab3100->dev, |
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"write error (read register page)\n" |
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" %d bytes transferred (expected %d)\n", |
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err, numregs); |
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err = -EIO; |
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goto get_reg_page_out_unlock; |
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} |
|
|
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/* All is well */ |
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err = 0; |
|
|
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get_reg_page_out_unlock: |
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mutex_unlock(&ab3100->access_mutex); |
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return err; |
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} |
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|
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static int get_register_page_interruptible(struct device *dev, u8 bank, |
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u8 first_reg, u8 *regvals, u8 numregs) |
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{ |
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struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); |
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|
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return ab3100_get_register_page_interruptible(ab3100, |
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first_reg, regvals, numregs); |
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} |
|
|
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static int ab3100_mask_and_set_register_interruptible(struct ab3100 *ab3100, |
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u8 reg, u8 andmask, u8 ormask) |
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{ |
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u8 regandval[2] = {reg, 0}; |
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int err; |
|
|
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err = mutex_lock_interruptible(&ab3100->access_mutex); |
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if (err) |
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return err; |
|
|
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/* First read out the target register */ |
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err = i2c_master_send(ab3100->i2c_client, ®, 1); |
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if (err < 0) { |
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dev_err(ab3100->dev, |
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"write error (maskset send address): %d\n", |
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err); |
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goto get_maskset_unlock; |
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} else if (err != 1) { |
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dev_err(ab3100->dev, |
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"write error (maskset send address)\n" |
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" %d bytes transferred (expected 1)\n", |
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err); |
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err = -EIO; |
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goto get_maskset_unlock; |
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} |
|
|
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err = i2c_master_recv(ab3100->i2c_client, ®andval[1], 1); |
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if (err < 0) { |
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dev_err(ab3100->dev, |
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"write error (maskset read register): %d\n", |
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err); |
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goto get_maskset_unlock; |
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} else if (err != 1) { |
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dev_err(ab3100->dev, |
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"write error (maskset read register)\n" |
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" %d bytes transferred (expected 1)\n", |
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err); |
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err = -EIO; |
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goto get_maskset_unlock; |
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} |
|
|
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/* Modify the register */ |
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regandval[1] &= andmask; |
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regandval[1] |= ormask; |
|
|
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/* Write the register */ |
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err = i2c_master_send(ab3100->i2c_client, regandval, 2); |
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if (err < 0) { |
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dev_err(ab3100->dev, |
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"write error (write register): %d\n", |
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err); |
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goto get_maskset_unlock; |
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} else if (err != 2) { |
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dev_err(ab3100->dev, |
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"write error (write register)\n" |
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" %d bytes transferred (expected 2)\n", |
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err); |
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err = -EIO; |
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goto get_maskset_unlock; |
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} |
|
|
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/* All is well */ |
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err = 0; |
|
|
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get_maskset_unlock: |
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mutex_unlock(&ab3100->access_mutex); |
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return err; |
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} |
|
|
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static int mask_and_set_register_interruptible(struct device *dev, u8 bank, |
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u8 reg, u8 bitmask, u8 bitvalues) |
|
{ |
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struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); |
|
|
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return ab3100_mask_and_set_register_interruptible(ab3100, |
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reg, bitmask, (bitmask & bitvalues)); |
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} |
|
|
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/* |
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* Register a simple callback for handling any AB3100 events. |
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*/ |
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int ab3100_event_register(struct ab3100 *ab3100, |
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struct notifier_block *nb) |
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{ |
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return blocking_notifier_chain_register(&ab3100->event_subscribers, |
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nb); |
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} |
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EXPORT_SYMBOL(ab3100_event_register); |
|
|
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/* |
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* Remove a previously registered callback. |
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*/ |
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int ab3100_event_unregister(struct ab3100 *ab3100, |
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struct notifier_block *nb) |
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{ |
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return blocking_notifier_chain_unregister(&ab3100->event_subscribers, |
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nb); |
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} |
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EXPORT_SYMBOL(ab3100_event_unregister); |
|
|
|
|
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static int ab3100_event_registers_startup_state_get(struct device *dev, |
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u8 *event) |
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{ |
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struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); |
|
|
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if (!ab3100->startup_events_read) |
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return -EAGAIN; /* Try again later */ |
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memcpy(event, ab3100->startup_events, 3); |
|
|
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return 0; |
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} |
|
|
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static struct abx500_ops ab3100_ops = { |
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.get_chip_id = ab3100_get_chip_id, |
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.set_register = set_register_interruptible, |
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.get_register = get_register_interruptible, |
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.get_register_page = get_register_page_interruptible, |
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.set_register_page = NULL, |
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.mask_and_set_register = mask_and_set_register_interruptible, |
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.event_registers_startup_state_get = |
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ab3100_event_registers_startup_state_get, |
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.startup_irq_enabled = NULL, |
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}; |
|
|
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/* |
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* This is a threaded interrupt handler so we can make some |
|
* I2C calls etc. |
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*/ |
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static irqreturn_t ab3100_irq_handler(int irq, void *data) |
|
{ |
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struct ab3100 *ab3100 = data; |
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u8 event_regs[3]; |
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u32 fatevent; |
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int err; |
|
|
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err = ab3100_get_register_page_interruptible(ab3100, AB3100_EVENTA1, |
|
event_regs, 3); |
|
if (err) |
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goto err_event; |
|
|
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fatevent = (event_regs[0] << 16) | |
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(event_regs[1] << 8) | |
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event_regs[2]; |
|
|
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if (!ab3100->startup_events_read) { |
|
ab3100->startup_events[0] = event_regs[0]; |
|
ab3100->startup_events[1] = event_regs[1]; |
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ab3100->startup_events[2] = event_regs[2]; |
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ab3100->startup_events_read = true; |
|
} |
|
/* |
|
* The notified parties will have to mask out the events |
|
* they're interested in and react to them. They will be |
|
* notified on all events, then they use the fatevent value |
|
* to determine if they're interested. |
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*/ |
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blocking_notifier_call_chain(&ab3100->event_subscribers, |
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fatevent, NULL); |
|
|
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dev_dbg(ab3100->dev, |
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"IRQ Event: 0x%08x\n", fatevent); |
|
|
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return IRQ_HANDLED; |
|
|
|
err_event: |
|
dev_dbg(ab3100->dev, |
|
"error reading event status\n"); |
|
return IRQ_HANDLED; |
|
} |
|
|
|
#ifdef CONFIG_DEBUG_FS |
|
/* |
|
* Some debugfs entries only exposed if we're using debug |
|
*/ |
|
static int ab3100_registers_print(struct seq_file *s, void *p) |
|
{ |
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struct ab3100 *ab3100 = s->private; |
|
u8 value; |
|
u8 reg; |
|
|
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seq_puts(s, "AB3100 registers:\n"); |
|
|
|
for (reg = 0; reg < 0xff; reg++) { |
|
ab3100_get_register_interruptible(ab3100, reg, &value); |
|
seq_printf(s, "[0x%x]: 0x%x\n", reg, value); |
|
} |
|
return 0; |
|
} |
|
|
|
static int ab3100_registers_open(struct inode *inode, struct file *file) |
|
{ |
|
return single_open(file, ab3100_registers_print, inode->i_private); |
|
} |
|
|
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static const struct file_operations ab3100_registers_fops = { |
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.open = ab3100_registers_open, |
|
.read = seq_read, |
|
.llseek = seq_lseek, |
|
.release = single_release, |
|
.owner = THIS_MODULE, |
|
}; |
|
|
|
struct ab3100_get_set_reg_priv { |
|
struct ab3100 *ab3100; |
|
bool mode; |
|
}; |
|
|
|
static ssize_t ab3100_get_set_reg(struct file *file, |
|
const char __user *user_buf, |
|
size_t count, loff_t *ppos) |
|
{ |
|
struct ab3100_get_set_reg_priv *priv = file->private_data; |
|
struct ab3100 *ab3100 = priv->ab3100; |
|
char buf[32]; |
|
ssize_t buf_size; |
|
int regp; |
|
u8 user_reg; |
|
int err; |
|
int i = 0; |
|
|
|
/* Get userspace string and assure termination */ |
|
buf_size = min((ssize_t)count, (ssize_t)(sizeof(buf)-1)); |
|
if (copy_from_user(buf, user_buf, buf_size)) |
|
return -EFAULT; |
|
buf[buf_size] = 0; |
|
|
|
/* |
|
* The idea is here to parse a string which is either |
|
* "0xnn" for reading a register, or "0xaa 0xbb" for |
|
* writing 0xbb to the register 0xaa. First move past |
|
* whitespace and then begin to parse the register. |
|
*/ |
|
while ((i < buf_size) && (buf[i] == ' ')) |
|
i++; |
|
regp = i; |
|
|
|
/* |
|
* Advance pointer to end of string then terminate |
|
* the register string. This is needed to satisfy |
|
* the kstrtou8() function. |
|
*/ |
|
while ((i < buf_size) && (buf[i] != ' ')) |
|
i++; |
|
buf[i] = '\0'; |
|
|
|
err = kstrtou8(&buf[regp], 16, &user_reg); |
|
if (err) |
|
return err; |
|
|
|
/* Either we read or we write a register here */ |
|
if (!priv->mode) { |
|
/* Reading */ |
|
u8 regvalue; |
|
|
|
ab3100_get_register_interruptible(ab3100, user_reg, ®value); |
|
|
|
dev_info(ab3100->dev, |
|
"debug read AB3100 reg[0x%02x]: 0x%02x\n", |
|
user_reg, regvalue); |
|
} else { |
|
int valp; |
|
u8 user_value; |
|
u8 regvalue; |
|
|
|
/* |
|
* Writing, we need some value to write to |
|
* the register so keep parsing the string |
|
* from userspace. |
|
*/ |
|
i++; |
|
while ((i < buf_size) && (buf[i] == ' ')) |
|
i++; |
|
valp = i; |
|
while ((i < buf_size) && (buf[i] != ' ')) |
|
i++; |
|
buf[i] = '\0'; |
|
|
|
err = kstrtou8(&buf[valp], 16, &user_value); |
|
if (err) |
|
return err; |
|
|
|
ab3100_set_register_interruptible(ab3100, user_reg, user_value); |
|
ab3100_get_register_interruptible(ab3100, user_reg, ®value); |
|
|
|
dev_info(ab3100->dev, |
|
"debug write reg[0x%02x]\n" |
|
" with 0x%02x, after readback: 0x%02x\n", |
|
user_reg, user_value, regvalue); |
|
} |
|
return buf_size; |
|
} |
|
|
|
static const struct file_operations ab3100_get_set_reg_fops = { |
|
.open = simple_open, |
|
.write = ab3100_get_set_reg, |
|
.llseek = noop_llseek, |
|
}; |
|
|
|
static struct ab3100_get_set_reg_priv ab3100_get_priv; |
|
static struct ab3100_get_set_reg_priv ab3100_set_priv; |
|
|
|
static void ab3100_setup_debugfs(struct ab3100 *ab3100) |
|
{ |
|
struct dentry *ab3100_dir; |
|
|
|
ab3100_dir = debugfs_create_dir("ab3100", NULL); |
|
|
|
debugfs_create_file("registers", S_IRUGO, ab3100_dir, ab3100, |
|
&ab3100_registers_fops); |
|
|
|
ab3100_get_priv.ab3100 = ab3100; |
|
ab3100_get_priv.mode = false; |
|
debugfs_create_file("get_reg", S_IWUSR, ab3100_dir, &ab3100_get_priv, |
|
&ab3100_get_set_reg_fops); |
|
|
|
ab3100_set_priv.ab3100 = ab3100; |
|
ab3100_set_priv.mode = true; |
|
debugfs_create_file("set_reg", S_IWUSR, ab3100_dir, &ab3100_set_priv, |
|
&ab3100_get_set_reg_fops); |
|
} |
|
#else |
|
static inline void ab3100_setup_debugfs(struct ab3100 *ab3100) |
|
{ |
|
} |
|
#endif |
|
|
|
/* |
|
* Basic set-up, datastructure creation/destruction and I2C interface. |
|
* This sets up a default config in the AB3100 chip so that it |
|
* will work as expected. |
|
*/ |
|
|
|
struct ab3100_init_setting { |
|
u8 abreg; |
|
u8 setting; |
|
}; |
|
|
|
static const struct ab3100_init_setting ab3100_init_settings[] = { |
|
{ |
|
.abreg = AB3100_MCA, |
|
.setting = 0x01 |
|
}, { |
|
.abreg = AB3100_MCB, |
|
.setting = 0x30 |
|
}, { |
|
.abreg = AB3100_IMRA1, |
|
.setting = 0x00 |
|
}, { |
|
.abreg = AB3100_IMRA2, |
|
.setting = 0xFF |
|
}, { |
|
.abreg = AB3100_IMRA3, |
|
.setting = 0x01 |
|
}, { |
|
.abreg = AB3100_IMRB1, |
|
.setting = 0xBF |
|
}, { |
|
.abreg = AB3100_IMRB2, |
|
.setting = 0xFF |
|
}, { |
|
.abreg = AB3100_IMRB3, |
|
.setting = 0xFF |
|
}, { |
|
.abreg = AB3100_SUP, |
|
.setting = 0x00 |
|
}, { |
|
.abreg = AB3100_DIS, |
|
.setting = 0xF0 |
|
}, { |
|
.abreg = AB3100_D0C, |
|
.setting = 0x00 |
|
}, { |
|
.abreg = AB3100_D1C, |
|
.setting = 0x00 |
|
}, { |
|
.abreg = AB3100_D2C, |
|
.setting = 0x00 |
|
}, { |
|
.abreg = AB3100_D3C, |
|
.setting = 0x00 |
|
}, |
|
}; |
|
|
|
static int ab3100_setup(struct ab3100 *ab3100) |
|
{ |
|
int err = 0; |
|
int i; |
|
|
|
for (i = 0; i < ARRAY_SIZE(ab3100_init_settings); i++) { |
|
err = ab3100_set_register_interruptible(ab3100, |
|
ab3100_init_settings[i].abreg, |
|
ab3100_init_settings[i].setting); |
|
if (err) |
|
goto exit_no_setup; |
|
} |
|
|
|
/* |
|
* Special trick to make the AB3100 use the 32kHz clock (RTC) |
|
* bit 3 in test register 0x02 is a special, undocumented test |
|
* register bit that only exist in AB3100 P1E |
|
*/ |
|
if (ab3100->chip_id == 0xc4) { |
|
dev_warn(ab3100->dev, |
|
"AB3100 P1E variant detected forcing chip to 32KHz\n"); |
|
err = ab3100_set_test_register_interruptible(ab3100, |
|
0x02, 0x08); |
|
} |
|
|
|
exit_no_setup: |
|
return err; |
|
} |
|
|
|
/* The subdevices of the AB3100 */ |
|
static struct mfd_cell ab3100_devs[] = { |
|
{ |
|
.name = "ab3100-dac", |
|
.id = -1, |
|
}, |
|
{ |
|
.name = "ab3100-leds", |
|
.id = -1, |
|
}, |
|
{ |
|
.name = "ab3100-power", |
|
.id = -1, |
|
}, |
|
{ |
|
.name = "ab3100-regulators", |
|
.of_compatible = "stericsson,ab3100-regulators", |
|
.id = -1, |
|
}, |
|
{ |
|
.name = "ab3100-sim", |
|
.id = -1, |
|
}, |
|
{ |
|
.name = "ab3100-uart", |
|
.id = -1, |
|
}, |
|
{ |
|
.name = "ab3100-rtc", |
|
.id = -1, |
|
}, |
|
{ |
|
.name = "ab3100-charger", |
|
.id = -1, |
|
}, |
|
{ |
|
.name = "ab3100-boost", |
|
.id = -1, |
|
}, |
|
{ |
|
.name = "ab3100-adc", |
|
.id = -1, |
|
}, |
|
{ |
|
.name = "ab3100-fuelgauge", |
|
.id = -1, |
|
}, |
|
{ |
|
.name = "ab3100-vibrator", |
|
.id = -1, |
|
}, |
|
{ |
|
.name = "ab3100-otp", |
|
.id = -1, |
|
}, |
|
{ |
|
.name = "ab3100-codec", |
|
.id = -1, |
|
}, |
|
}; |
|
|
|
struct ab_family_id { |
|
u8 id; |
|
char *name; |
|
}; |
|
|
|
static const struct ab_family_id ids[] = { |
|
/* AB3100 */ |
|
{ |
|
.id = 0xc0, |
|
.name = "P1A" |
|
}, { |
|
.id = 0xc1, |
|
.name = "P1B" |
|
}, { |
|
.id = 0xc2, |
|
.name = "P1C" |
|
}, { |
|
.id = 0xc3, |
|
.name = "P1D" |
|
}, { |
|
.id = 0xc4, |
|
.name = "P1E" |
|
}, { |
|
.id = 0xc5, |
|
.name = "P1F/R1A" |
|
}, { |
|
.id = 0xc6, |
|
.name = "P1G/R1A" |
|
}, { |
|
.id = 0xc7, |
|
.name = "P2A/R2A" |
|
}, { |
|
.id = 0xc8, |
|
.name = "P2B/R2B" |
|
}, |
|
/* AB3000 variants, not supported */ |
|
{ |
|
.id = 0xa0 |
|
}, { |
|
.id = 0xa1 |
|
}, { |
|
.id = 0xa2 |
|
}, { |
|
.id = 0xa3 |
|
}, { |
|
.id = 0xa4 |
|
}, { |
|
.id = 0xa5 |
|
}, { |
|
.id = 0xa6 |
|
}, { |
|
.id = 0xa7 |
|
}, |
|
/* Terminator */ |
|
{ |
|
.id = 0x00, |
|
}, |
|
}; |
|
|
|
static int ab3100_probe(struct i2c_client *client, |
|
const struct i2c_device_id *id) |
|
{ |
|
struct ab3100 *ab3100; |
|
struct ab3100_platform_data *ab3100_plf_data = |
|
dev_get_platdata(&client->dev); |
|
int err; |
|
int i; |
|
|
|
ab3100 = devm_kzalloc(&client->dev, sizeof(struct ab3100), GFP_KERNEL); |
|
if (!ab3100) |
|
return -ENOMEM; |
|
|
|
/* Initialize data structure */ |
|
mutex_init(&ab3100->access_mutex); |
|
BLOCKING_INIT_NOTIFIER_HEAD(&ab3100->event_subscribers); |
|
|
|
ab3100->i2c_client = client; |
|
ab3100->dev = &ab3100->i2c_client->dev; |
|
|
|
i2c_set_clientdata(client, ab3100); |
|
|
|
/* Read chip ID register */ |
|
err = ab3100_get_register_interruptible(ab3100, AB3100_CID, |
|
&ab3100->chip_id); |
|
if (err) { |
|
dev_err(&client->dev, |
|
"failed to communicate with AB3100 chip\n"); |
|
goto exit_no_detect; |
|
} |
|
|
|
for (i = 0; ids[i].id != 0x0; i++) { |
|
if (ids[i].id == ab3100->chip_id) { |
|
if (ids[i].name) |
|
break; |
|
|
|
dev_err(&client->dev, "AB3000 is not supported\n"); |
|
goto exit_no_detect; |
|
} |
|
} |
|
|
|
snprintf(&ab3100->chip_name[0], |
|
sizeof(ab3100->chip_name) - 1, "AB3100 %s", ids[i].name); |
|
|
|
if (ids[i].id == 0x0) { |
|
dev_err(&client->dev, "unknown analog baseband chip id: 0x%x\n", |
|
ab3100->chip_id); |
|
dev_err(&client->dev, |
|
"accepting it anyway. Please update the driver.\n"); |
|
goto exit_no_detect; |
|
} |
|
|
|
dev_info(&client->dev, "Detected chip: %s\n", |
|
&ab3100->chip_name[0]); |
|
|
|
/* Attach a second dummy i2c_client to the test register address */ |
|
ab3100->testreg_client = i2c_new_dummy_device(client->adapter, |
|
client->addr + 1); |
|
if (IS_ERR(ab3100->testreg_client)) { |
|
err = PTR_ERR(ab3100->testreg_client); |
|
goto exit_no_testreg_client; |
|
} |
|
|
|
err = ab3100_setup(ab3100); |
|
if (err) |
|
goto exit_no_setup; |
|
|
|
err = devm_request_threaded_irq(&client->dev, |
|
client->irq, NULL, ab3100_irq_handler, |
|
IRQF_ONESHOT, "ab3100-core", ab3100); |
|
if (err) |
|
goto exit_no_irq; |
|
|
|
err = abx500_register_ops(&client->dev, &ab3100_ops); |
|
if (err) |
|
goto exit_no_ops; |
|
|
|
/* Set up and register the platform devices. */ |
|
for (i = 0; i < ARRAY_SIZE(ab3100_devs); i++) { |
|
ab3100_devs[i].platform_data = ab3100_plf_data; |
|
ab3100_devs[i].pdata_size = sizeof(struct ab3100_platform_data); |
|
} |
|
|
|
err = mfd_add_devices(&client->dev, 0, ab3100_devs, |
|
ARRAY_SIZE(ab3100_devs), NULL, 0, NULL); |
|
|
|
ab3100_setup_debugfs(ab3100); |
|
|
|
return 0; |
|
|
|
exit_no_ops: |
|
exit_no_irq: |
|
exit_no_setup: |
|
i2c_unregister_device(ab3100->testreg_client); |
|
exit_no_testreg_client: |
|
exit_no_detect: |
|
return err; |
|
} |
|
|
|
static const struct i2c_device_id ab3100_id[] = { |
|
{ "ab3100", 0 }, |
|
{ } |
|
}; |
|
|
|
static struct i2c_driver ab3100_driver = { |
|
.driver = { |
|
.name = "ab3100", |
|
.suppress_bind_attrs = true, |
|
}, |
|
.id_table = ab3100_id, |
|
.probe = ab3100_probe, |
|
}; |
|
|
|
static int __init ab3100_i2c_init(void) |
|
{ |
|
return i2c_add_driver(&ab3100_driver); |
|
} |
|
subsys_initcall(ab3100_i2c_init);
|
|
|