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@ -1,7 +1,8 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* |
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* FS-iA6B iBus RC receiver kernel driver |
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* Copyright (C) 2018 Markus Koch <markus@notsyncing.net> |
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* Copyright (C) 2018 - 2019 Markus Koch <markus@notsyncing.net> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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@ -18,11 +19,23 @@
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* |
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*/ |
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/*
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* This driver will provide all 14 channels of the FlySky FS-ia6B RC receiver |
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* as analog values. |
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* |
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* Additionally, the channels can be converted to discrete switch values. |
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* By default, it is configured for the offical FS-i6 remote control. |
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* If you use a different hardware configuration, you can configure it |
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* using the `switch_config` parameter. |
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* |
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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/input.h> |
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#include <linux/serio.h> |
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#include <linux/slab.h> |
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#include <linux/device.h> |
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#define SERIO_FSIA6B 100 /* TODO: This should be moved to the serio header */ |
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@ -33,7 +46,11 @@ MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL"); |
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#define IBUS_SERVO_COUNT 14 |
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#define IBUS_SWITCH_OFFSET 6 |
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static char *switch_config = "00000022320000"; |
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module_param(switch_config, charp, 0444); |
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MODULE_PARM_DESC(switch_config, |
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"Amount of switch positions per channel (14 characters, 0-3)"); |
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static int fsia6b_axes[IBUS_SERVO_COUNT] = { |
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ABS_X, ABS_Y, |
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@ -62,25 +79,20 @@ struct fsia6b {
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char phys[32]; |
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}; |
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static void fsia6b_serio_write_wakeup(struct serio *serio) |
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{ |
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struct fsia6b *fsia6b = serio_get_drvdata(serio); |
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printk(KERN_INFO "fsia6b: write wakeup.\n"); |
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} |
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static irqreturn_t fsia6b_serio_irq(struct serio *serio, |
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unsigned char data, unsigned int flags) |
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{ |
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struct fsia6b *fsia6b = serio_get_drvdata(serio); |
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int i; |
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int sw_state; |
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int sw_id = BTN_0; |
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fsia6b->packet.ibuf = (data << 8) | ((fsia6b->packet.ibuf >> 8) & 0xFF); |
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switch (fsia6b->packet.state) { |
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case SYNC: |
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if (fsia6b->packet.ibuf == 0x4020) { |
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if (fsia6b->packet.ibuf == 0x4020) |
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fsia6b->packet.state = COLLECT; |
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} |
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break; |
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case COLLECT: |
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@ -88,7 +100,8 @@ static irqreturn_t fsia6b_serio_irq(struct serio *serio,
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break; |
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case PROCESS: |
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fsia6b->packet.channel[fsia6b->packet.offset] = fsia6b->packet.ibuf; |
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fsia6b->packet.channel[fsia6b->packet.offset] = |
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fsia6b->packet.ibuf; |
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fsia6b->packet.offset++; |
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if (fsia6b->packet.offset == IBUS_SERVO_COUNT) { |
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@ -97,9 +110,28 @@ static irqreturn_t fsia6b_serio_irq(struct serio *serio,
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for (i = 0; i < IBUS_SERVO_COUNT; ++i) { |
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input_report_abs(fsia6b->dev, fsia6b_axes[i], |
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fsia6b->packet.channel[i]); |
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if (i >= IBUS_SWITCH_OFFSET) { |
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input_report_key(fsia6b->dev, BTN_1 + i*1, |
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(fsia6b->packet.channel[i] > 1900)); |
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sw_state = 0; |
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if (fsia6b->packet.channel[i] > 1900) |
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sw_state = 1; |
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else if (fsia6b->packet.channel[i] < 1100) |
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sw_state = 2; |
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switch (switch_config[i]) { |
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case '3': |
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input_report_key(fsia6b->dev, |
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sw_id++, |
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sw_state == 0); |
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/* fall-through */ |
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case '2': |
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input_report_key(fsia6b->dev, |
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sw_id++, |
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sw_state == 1); |
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/* fall-through */ |
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case '1': |
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input_report_key(fsia6b->dev, |
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sw_id++, |
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sw_state == 2); |
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} |
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} |
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input_sync(fsia6b->dev); |
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@ -112,20 +144,13 @@ static irqreturn_t fsia6b_serio_irq(struct serio *serio,
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return IRQ_HANDLED; |
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} |
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int fsia6b_init_device(struct fsia6b *fsia6b) |
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{ |
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printk(KERN_INFO "fsia6b: init.\n"); |
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return 0; |
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} |
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static int fsia6b_serio_connect(struct serio *serio, struct serio_driver *drv) |
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{ |
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struct fsia6b *fsia6b; |
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struct input_dev *input_dev; |
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int err; |
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int i; |
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printk(KERN_INFO "fsia6b: connect.\n"); |
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int i, j; |
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int sw_id = BTN_0; |
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fsia6b = kzalloc(sizeof(struct fsia6b), GFP_KERNEL); |
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if (!fsia6b) |
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@ -161,25 +186,35 @@ static int fsia6b_serio_connect(struct serio *serio, struct serio_driver *drv)
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
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for (i = 0; i < IBUS_SERVO_COUNT; ++i) { |
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input_set_abs_params(input_dev, fsia6b_axes[i], 1000, 2000, 2, 2); |
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if (i >= IBUS_SWITCH_OFFSET) { |
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input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_1 + i); |
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input_set_abs_params(input_dev, fsia6b_axes[i], |
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1000, 2000, 2, 2); |
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} |
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// Register switch configuration
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for (i = 0; i < IBUS_SERVO_COUNT; ++i) { |
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if (((switch_config[i] == '\0') && (i != IBUS_SERVO_COUNT)) || |
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(switch_config[i] < '0') || |
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(switch_config[i] > '3')) { |
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dev_err(&fsia6b->dev->dev, |
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"Invalid switch configuration supplied for fsia6b.\n"); |
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return -EINVAL; |
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} |
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for (j = '1'; j <= switch_config[i]; ++j) { |
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input_dev->keybit[BIT_WORD(BTN_0)] |= |
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BIT_MASK(sw_id++); |
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} |
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} |
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err = input_register_device(fsia6b->dev); |
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if (err) |
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goto fail2; |
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err = fsia6b_init_device(fsia6b); |
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if (err) |
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goto fail3; |
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return 0; |
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fail3: input_free_device(input_dev); |
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fail2: serio_close(serio); |
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fail1: serio_set_drvdata(serio, NULL); |
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fail2: serio_close(serio); |
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fail1: serio_set_drvdata(serio, NULL); |
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kfree(fsia6b); |
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return err; |
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} |
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@ -188,8 +223,6 @@ static void fsia6b_serio_disconnect(struct serio *serio)
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{ |
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struct fsia6b *fsia6b = serio_get_drvdata(serio); |
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printk(KERN_INFO "fsia6b: disconnect.\n"); |
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serio_close(serio); |
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serio_set_drvdata(serio, NULL); |
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input_unregister_device(fsia6b->dev); |
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@ -197,13 +230,13 @@ static void fsia6b_serio_disconnect(struct serio *serio)
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} |
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static const struct serio_device_id fsia6b_serio_ids[] = { |
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{ |
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.type = SERIO_RS232, |
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.proto = SERIO_FSIA6B, |
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.id = SERIO_ANY, |
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.extra = SERIO_ANY, |
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}, |
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{ 0 } |
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{ |
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.type = SERIO_RS232, |
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.proto = SERIO_FSIA6B, |
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.id = SERIO_ANY, |
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.extra = SERIO_ANY, |
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}, |
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{ 0 } |
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}; |
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MODULE_DEVICE_TABLE(serio, fsia6b_serio_ids); |
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@ -214,7 +247,6 @@ struct serio_driver fsia6b_serio_drv = {
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}, |
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.description = DRIVER_DESC, |
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.id_table = fsia6b_serio_ids, |
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.write_wakeup = fsia6b_serio_write_wakeup, |
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.interrupt = fsia6b_serio_irq, |
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.connect = fsia6b_serio_connect, |
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.disconnect = fsia6b_serio_disconnect |
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