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241 lines
6.0 KiB
241 lines
6.0 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (c) 2012-2020 Synaptics Incorporated |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/rmi.h> |
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#include <linux/input.h> |
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#include <linux/slab.h> |
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#include "rmi_driver.h" |
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#define RMI_F3A_MAX_GPIO_COUNT 128 |
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#define RMI_F3A_MAX_REG_SIZE DIV_ROUND_UP(RMI_F3A_MAX_GPIO_COUNT, 8) |
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/* Defs for Query 0 */ |
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#define RMI_F3A_GPIO_COUNT 0x7F |
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#define RMI_F3A_DATA_REGS_MAX_SIZE RMI_F3A_MAX_REG_SIZE |
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#define TRACKSTICK_RANGE_START 3 |
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#define TRACKSTICK_RANGE_END 6 |
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struct f3a_data { |
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/* Query Data */ |
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u8 gpio_count; |
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u8 register_count; |
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u8 data_regs[RMI_F3A_DATA_REGS_MAX_SIZE]; |
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u16 *gpio_key_map; |
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struct input_dev *input; |
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struct rmi_function *f03; |
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bool trackstick_buttons; |
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}; |
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static void rmi_f3a_report_button(struct rmi_function *fn, |
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struct f3a_data *f3a, unsigned int button) |
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{ |
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u16 key_code = f3a->gpio_key_map[button]; |
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bool key_down = !(f3a->data_regs[0] & BIT(button)); |
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if (f3a->trackstick_buttons && |
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button >= TRACKSTICK_RANGE_START && |
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button <= TRACKSTICK_RANGE_END) { |
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rmi_f03_overwrite_button(f3a->f03, key_code, key_down); |
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} else { |
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rmi_dbg(RMI_DEBUG_FN, &fn->dev, |
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"%s: call input report key (0x%04x) value (0x%02x)", |
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__func__, key_code, key_down); |
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input_report_key(f3a->input, key_code, key_down); |
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} |
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} |
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static irqreturn_t rmi_f3a_attention(int irq, void *ctx) |
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{ |
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struct rmi_function *fn = ctx; |
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struct f3a_data *f3a = dev_get_drvdata(&fn->dev); |
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struct rmi_driver_data *drvdata = dev_get_drvdata(&fn->rmi_dev->dev); |
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int error; |
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int i; |
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if (drvdata->attn_data.data) { |
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if (drvdata->attn_data.size < f3a->register_count) { |
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dev_warn(&fn->dev, |
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"F3A interrupted, but data is missing\n"); |
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return IRQ_HANDLED; |
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} |
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memcpy(f3a->data_regs, drvdata->attn_data.data, |
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f3a->register_count); |
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drvdata->attn_data.data += f3a->register_count; |
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drvdata->attn_data.size -= f3a->register_count; |
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} else { |
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error = rmi_read_block(fn->rmi_dev, fn->fd.data_base_addr, |
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f3a->data_regs, f3a->register_count); |
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if (error) { |
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dev_err(&fn->dev, |
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"%s: Failed to read F3a data registers: %d\n", |
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__func__, error); |
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return IRQ_RETVAL(error); |
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} |
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} |
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for (i = 0; i < f3a->gpio_count; i++) |
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if (f3a->gpio_key_map[i] != KEY_RESERVED) |
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rmi_f3a_report_button(fn, f3a, i); |
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if (f3a->trackstick_buttons) |
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rmi_f03_commit_buttons(f3a->f03); |
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return IRQ_HANDLED; |
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} |
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static int rmi_f3a_config(struct rmi_function *fn) |
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{ |
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struct f3a_data *f3a = dev_get_drvdata(&fn->dev); |
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struct rmi_driver *drv = fn->rmi_dev->driver; |
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const struct rmi_device_platform_data *pdata = |
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rmi_get_platform_data(fn->rmi_dev); |
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if (!f3a) |
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return 0; |
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if (pdata->gpio_data.trackstick_buttons) { |
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/* Try [re-]establish link to F03. */ |
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f3a->f03 = rmi_find_function(fn->rmi_dev, 0x03); |
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f3a->trackstick_buttons = f3a->f03 != NULL; |
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} |
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drv->set_irq_bits(fn->rmi_dev, fn->irq_mask); |
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return 0; |
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} |
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static bool rmi_f3a_is_valid_button(int button, struct f3a_data *f3a, |
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u8 *query1_regs, u8 *ctrl1_regs) |
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{ |
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/* gpio exist && direction input */ |
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return (query1_regs[0] & BIT(button)) && !(ctrl1_regs[0] & BIT(button)); |
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} |
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static int rmi_f3a_map_gpios(struct rmi_function *fn, struct f3a_data *f3a, |
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u8 *query1_regs, u8 *ctrl1_regs) |
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{ |
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const struct rmi_device_platform_data *pdata = |
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rmi_get_platform_data(fn->rmi_dev); |
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struct input_dev *input = f3a->input; |
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unsigned int button = BTN_LEFT; |
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unsigned int trackstick_button = BTN_LEFT; |
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bool button_mapped = false; |
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int i; |
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int button_count = min_t(u8, f3a->gpio_count, TRACKSTICK_RANGE_END); |
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f3a->gpio_key_map = devm_kcalloc(&fn->dev, |
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button_count, |
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sizeof(f3a->gpio_key_map[0]), |
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GFP_KERNEL); |
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if (!f3a->gpio_key_map) { |
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dev_err(&fn->dev, "Failed to allocate gpio map memory.\n"); |
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return -ENOMEM; |
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} |
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for (i = 0; i < button_count; i++) { |
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if (!rmi_f3a_is_valid_button(i, f3a, query1_regs, ctrl1_regs)) |
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continue; |
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if (pdata->gpio_data.trackstick_buttons && |
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i >= TRACKSTICK_RANGE_START && |
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i < TRACKSTICK_RANGE_END) { |
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f3a->gpio_key_map[i] = trackstick_button++; |
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} else if (!pdata->gpio_data.buttonpad || !button_mapped) { |
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f3a->gpio_key_map[i] = button; |
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input_set_capability(input, EV_KEY, button++); |
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button_mapped = true; |
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} |
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} |
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input->keycode = f3a->gpio_key_map; |
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input->keycodesize = sizeof(f3a->gpio_key_map[0]); |
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input->keycodemax = f3a->gpio_count; |
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if (pdata->gpio_data.buttonpad || (button - BTN_LEFT == 1)) |
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__set_bit(INPUT_PROP_BUTTONPAD, input->propbit); |
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return 0; |
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} |
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static int rmi_f3a_initialize(struct rmi_function *fn, struct f3a_data *f3a) |
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{ |
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u8 query1[RMI_F3A_MAX_REG_SIZE]; |
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u8 ctrl1[RMI_F3A_MAX_REG_SIZE]; |
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u8 buf; |
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int error; |
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error = rmi_read(fn->rmi_dev, fn->fd.query_base_addr, &buf); |
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if (error < 0) { |
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dev_err(&fn->dev, "Failed to read general info register: %d\n", |
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error); |
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return -ENODEV; |
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} |
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f3a->gpio_count = buf & RMI_F3A_GPIO_COUNT; |
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f3a->register_count = DIV_ROUND_UP(f3a->gpio_count, 8); |
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/* Query1 -> gpio exist */ |
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error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr + 1, |
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query1, f3a->register_count); |
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if (error) { |
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dev_err(&fn->dev, "Failed to read query1 register\n"); |
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return error; |
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} |
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/* Ctrl1 -> gpio direction */ |
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error = rmi_read_block(fn->rmi_dev, fn->fd.control_base_addr + 1, |
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ctrl1, f3a->register_count); |
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if (error) { |
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dev_err(&fn->dev, "Failed to read control1 register\n"); |
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return error; |
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} |
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error = rmi_f3a_map_gpios(fn, f3a, query1, ctrl1); |
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if (error) |
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return error; |
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return 0; |
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} |
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static int rmi_f3a_probe(struct rmi_function *fn) |
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{ |
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struct rmi_device *rmi_dev = fn->rmi_dev; |
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struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev); |
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struct f3a_data *f3a; |
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int error; |
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if (!drv_data->input) { |
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dev_info(&fn->dev, "F3A: no input device found, ignoring\n"); |
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return -ENXIO; |
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} |
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f3a = devm_kzalloc(&fn->dev, sizeof(*f3a), GFP_KERNEL); |
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if (!f3a) |
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return -ENOMEM; |
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f3a->input = drv_data->input; |
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error = rmi_f3a_initialize(fn, f3a); |
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if (error) |
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return error; |
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dev_set_drvdata(&fn->dev, f3a); |
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return 0; |
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} |
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struct rmi_function_handler rmi_f3a_handler = { |
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.driver = { |
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.name = "rmi4_f3a", |
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}, |
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.func = 0x3a, |
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.probe = rmi_f3a_probe, |
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.config = rmi_f3a_config, |
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.attention = rmi_f3a_attention, |
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};
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