| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Sundar R Iyer | 1553 | 77.81% | 1 | 7.14% |
| Linus Walleij | 315 | 15.78% | 2 | 14.29% |
| Dmitry Torokhov | 63 | 3.16% | 4 | 28.57% |
| Himangi Saraogi | 48 | 2.40% | 1 | 7.14% |
| Rabin Vincent | 10 | 0.50% | 1 | 7.14% |
| Thomas Gleixner | 2 | 0.10% | 1 | 7.14% |
| Valentin Rothberg | 2 | 0.10% | 1 | 7.14% |
| Clifton Barnes | 1 | 0.05% | 1 | 7.14% |
| JJ Ding | 1 | 0.05% | 1 | 7.14% |
| Dan Carpenter | 1 | 0.05% | 1 | 7.14% |
| Total | 1996 | 14 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) ST-Ericsson SA 2010 * * Author: Jayeeta Banerjee <jayeeta.banerjee@stericsson.com> * Author: Sundar Iyer <sundar.iyer@stericsson.com> * * TC35893 MFD Keypad Controller driver */ #include <linux/module.h> #include <linux/interrupt.h> #include <linux/input.h> #include <linux/platform_device.h> #include <linux/input/matrix_keypad.h> #include <linux/i2c.h> #include <linux/slab.h> #include <linux/mfd/tc3589x.h> #include <linux/device.h> /* Maximum supported keypad matrix row/columns size */ #define TC3589x_MAX_KPROW 8 #define TC3589x_MAX_KPCOL 12 /* keypad related Constants */ #define TC3589x_MAX_DEBOUNCE_SETTLE 0xFF #define DEDICATED_KEY_VAL 0xFF /* Pull up/down masks */ #define TC3589x_NO_PULL_MASK 0x0 #define TC3589x_PULL_DOWN_MASK 0x1 #define TC3589x_PULL_UP_MASK 0x2 #define TC3589x_PULLUP_ALL_MASK 0xAA #define TC3589x_IO_PULL_VAL(index, mask) ((mask)<<((index)%4)*2) /* Bit masks for IOCFG register */ #define IOCFG_BALLCFG 0x01 #define IOCFG_IG 0x08 #define KP_EVCODE_COL_MASK 0x0F #define KP_EVCODE_ROW_MASK 0x70 #define KP_RELEASE_EVT_MASK 0x80 #define KP_ROW_SHIFT 4 #define KP_NO_VALID_KEY_MASK 0x7F /* bit masks for RESTCTRL register */ #define TC3589x_KBDRST 0x2 #define TC3589x_IRQRST 0x10 #define TC3589x_RESET_ALL 0x1B /* KBDMFS register bit mask */ #define TC3589x_KBDMFS_EN 0x1 /* CLKEN register bitmask */ #define KPD_CLK_EN 0x1 /* RSTINTCLR register bit mask */ #define IRQ_CLEAR 0x1 /* bit masks for keyboard interrupts*/ #define TC3589x_EVT_LOSS_INT 0x8 #define TC3589x_EVT_INT 0x4 #define TC3589x_KBD_LOSS_INT 0x2 #define TC3589x_KBD_INT 0x1 /* bit masks for keyboard interrupt clear*/ #define TC3589x_EVT_INT_CLR 0x2 #define TC3589x_KBD_INT_CLR 0x1 /** * struct tc35893_keypad_platform_data - platform specific keypad data * @keymap_data: matrix scan code table for keycodes * @krow: mask for available rows, value is 0xFF * @kcol: mask for available columns, value is 0xFF * @debounce_period: platform specific debounce time * @settle_time: platform specific settle down time * @irqtype: type of interrupt, falling or rising edge * @enable_wakeup: specifies if keypad event can wake up system from sleep * @no_autorepeat: flag for auto repetition */ struct tc3589x_keypad_platform_data { const struct matrix_keymap_data *keymap_data; u8 krow; u8 kcol; u8 debounce_period; u8 settle_time; unsigned long irqtype; bool enable_wakeup; bool no_autorepeat; }; /** * struct tc_keypad - data structure used by keypad driver * @tc3589x: pointer to tc35893 * @input: pointer to input device object * @board: keypad platform device * @krow: number of rows * @kcol: number of columns * @keymap: matrix scan code table for keycodes * @keypad_stopped: holds keypad status */ struct tc_keypad { struct tc3589x *tc3589x; struct input_dev *input; const struct tc3589x_keypad_platform_data *board; unsigned int krow; unsigned int kcol; unsigned short *keymap; bool keypad_stopped; }; static int tc3589x_keypad_init_key_hardware(struct tc_keypad *keypad) { int ret; struct tc3589x *tc3589x = keypad->tc3589x; const struct tc3589x_keypad_platform_data *board = keypad->board; /* validate platform configuration */ if (board->kcol > TC3589x_MAX_KPCOL || board->krow > TC3589x_MAX_KPROW) return -EINVAL; /* configure KBDSIZE 4 LSbits for cols and 4 MSbits for rows */ ret = tc3589x_reg_write(tc3589x, TC3589x_KBDSIZE, (board->krow << KP_ROW_SHIFT) | board->kcol); if (ret < 0) return ret; /* configure dedicated key config, no dedicated key selected */ ret = tc3589x_reg_write(tc3589x, TC3589x_KBCFG_LSB, DEDICATED_KEY_VAL); if (ret < 0) return ret; ret = tc3589x_reg_write(tc3589x, TC3589x_KBCFG_MSB, DEDICATED_KEY_VAL); if (ret < 0) return ret; /* Configure settle time */ ret = tc3589x_reg_write(tc3589x, TC3589x_KBDSETTLE_REG, board->settle_time); if (ret < 0) return ret; /* Configure debounce time */ ret = tc3589x_reg_write(tc3589x, TC3589x_KBDBOUNCE, board->debounce_period); if (ret < 0) return ret; /* Start of initialise keypad GPIOs */ ret = tc3589x_set_bits(tc3589x, TC3589x_IOCFG, 0x0, IOCFG_IG); if (ret < 0) return ret; /* Configure pull-up resistors for all row GPIOs */ ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG0_LSB, TC3589x_PULLUP_ALL_MASK); if (ret < 0) return ret; ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG0_MSB, TC3589x_PULLUP_ALL_MASK); if (ret < 0) return ret; /* Configure pull-up resistors for all column GPIOs */ ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG1_LSB, TC3589x_PULLUP_ALL_MASK); if (ret < 0) return ret; ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG1_MSB, TC3589x_PULLUP_ALL_MASK); if (ret < 0) return ret; ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG2_LSB, TC3589x_PULLUP_ALL_MASK); return ret; } #define TC35893_DATA_REGS 4 #define TC35893_KEYCODE_FIFO_EMPTY 0x7f #define TC35893_KEYCODE_FIFO_CLEAR 0xff #define TC35893_KEYPAD_ROW_SHIFT 0x3 static irqreturn_t tc3589x_keypad_irq(int irq, void *dev) { struct tc_keypad *keypad = dev; struct tc3589x *tc3589x = keypad->tc3589x; u8 i, row_index, col_index, kbd_code, up; u8 code; for (i = 0; i < TC35893_DATA_REGS * 2; i++) { kbd_code = tc3589x_reg_read(tc3589x, TC3589x_EVTCODE_FIFO); /* loop till fifo is empty and no more keys are pressed */ if (kbd_code == TC35893_KEYCODE_FIFO_EMPTY || kbd_code == TC35893_KEYCODE_FIFO_CLEAR) continue; /* valid key is found */ col_index = kbd_code & KP_EVCODE_COL_MASK; row_index = (kbd_code & KP_EVCODE_ROW_MASK) >> KP_ROW_SHIFT; code = MATRIX_SCAN_CODE(row_index, col_index, TC35893_KEYPAD_ROW_SHIFT); up = kbd_code & KP_RELEASE_EVT_MASK; input_event(keypad->input, EV_MSC, MSC_SCAN, code); input_report_key(keypad->input, keypad->keymap[code], !up); input_sync(keypad->input); } /* clear IRQ */ tc3589x_set_bits(tc3589x, TC3589x_KBDIC, 0x0, TC3589x_EVT_INT_CLR | TC3589x_KBD_INT_CLR); /* enable IRQ */ tc3589x_set_bits(tc3589x, TC3589x_KBDMSK, 0x0, TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT); return IRQ_HANDLED; } static int tc3589x_keypad_enable(struct tc_keypad *keypad) { struct tc3589x *tc3589x = keypad->tc3589x; int ret; /* pull the keypad module out of reset */ ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, TC3589x_KBDRST, 0x0); if (ret < 0) return ret; /* configure KBDMFS */ ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMFS, 0x0, TC3589x_KBDMFS_EN); if (ret < 0) return ret; /* enable the keypad clock */ ret = tc3589x_set_bits(tc3589x, TC3589x_CLKEN, 0x0, KPD_CLK_EN); if (ret < 0) return ret; /* clear pending IRQs */ ret = tc3589x_set_bits(tc3589x, TC3589x_RSTINTCLR, 0x0, 0x1); if (ret < 0) return ret; /* enable the IRQs */ ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMSK, 0x0, TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT); if (ret < 0) return ret; keypad->keypad_stopped = false; return ret; } static int tc3589x_keypad_disable(struct tc_keypad *keypad) { struct tc3589x *tc3589x = keypad->tc3589x; int ret; /* clear IRQ */ ret = tc3589x_set_bits(tc3589x, TC3589x_KBDIC, 0x0, TC3589x_EVT_INT_CLR | TC3589x_KBD_INT_CLR); if (ret < 0) return ret; /* disable all interrupts */ ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMSK, ~(TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT), 0x0); if (ret < 0) return ret; /* disable the keypad module */ ret = tc3589x_set_bits(tc3589x, TC3589x_CLKEN, 0x1, 0x0); if (ret < 0) return ret; /* put the keypad module into reset */ ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, TC3589x_KBDRST, 0x1); keypad->keypad_stopped = true; return ret; } static int tc3589x_keypad_open(struct input_dev *input) { int error; struct tc_keypad *keypad = input_get_drvdata(input); /* enable the keypad module */ error = tc3589x_keypad_enable(keypad); if (error < 0) { dev_err(&input->dev, "failed to enable keypad module\n"); return error; } error = tc3589x_keypad_init_key_hardware(keypad); if (error < 0) { dev_err(&input->dev, "failed to configure keypad module\n"); return error; } return 0; } static void tc3589x_keypad_close(struct input_dev *input) { struct tc_keypad *keypad = input_get_drvdata(input); /* disable the keypad module */ tc3589x_keypad_disable(keypad); } static const struct tc3589x_keypad_platform_data * tc3589x_keypad_of_probe(struct device *dev) { struct device_node *np = dev->of_node; struct tc3589x_keypad_platform_data *plat; u32 cols, rows; u32 debounce_ms; int proplen; if (!np) return ERR_PTR(-ENODEV); plat = devm_kzalloc(dev, sizeof(*plat), GFP_KERNEL); if (!plat) return ERR_PTR(-ENOMEM); of_property_read_u32(np, "keypad,num-columns", &cols); of_property_read_u32(np, "keypad,num-rows", &rows); plat->kcol = (u8) cols; plat->krow = (u8) rows; if (!plat->krow || !plat->kcol || plat->krow > TC_KPD_ROWS || plat->kcol > TC_KPD_COLUMNS) { dev_err(dev, "keypad columns/rows not properly specified (%ux%u)\n", plat->kcol, plat->krow); return ERR_PTR(-EINVAL); } if (!of_get_property(np, "linux,keymap", &proplen)) { dev_err(dev, "property linux,keymap not found\n"); return ERR_PTR(-ENOENT); } plat->no_autorepeat = of_property_read_bool(np, "linux,no-autorepeat"); plat->enable_wakeup = of_property_read_bool(np, "wakeup-source") || /* legacy name */ of_property_read_bool(np, "linux,wakeup"); /* The custom delay format is ms/16 */ of_property_read_u32(np, "debounce-delay-ms", &debounce_ms); if (debounce_ms) plat->debounce_period = debounce_ms * 16; else plat->debounce_period = TC_KPD_DEBOUNCE_PERIOD; plat->settle_time = TC_KPD_SETTLE_TIME; /* FIXME: should be property of the IRQ resource? */ plat->irqtype = IRQF_TRIGGER_FALLING; return plat; } static int tc3589x_keypad_probe(struct platform_device *pdev) { struct tc3589x *tc3589x = dev_get_drvdata(pdev->dev.parent); struct tc_keypad *keypad; struct input_dev *input; const struct tc3589x_keypad_platform_data *plat; int error, irq; plat = tc3589x_keypad_of_probe(&pdev->dev); if (IS_ERR(plat)) { dev_err(&pdev->dev, "invalid keypad platform data\n"); return PTR_ERR(plat); } irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; keypad = devm_kzalloc(&pdev->dev, sizeof(struct tc_keypad), GFP_KERNEL); if (!keypad) return -ENOMEM; input = devm_input_allocate_device(&pdev->dev); if (!input) { dev_err(&pdev->dev, "failed to allocate input device\n"); return -ENOMEM; } keypad->board = plat; keypad->input = input; keypad->tc3589x = tc3589x; input->id.bustype = BUS_I2C; input->name = pdev->name; input->dev.parent = &pdev->dev; input->open = tc3589x_keypad_open; input->close = tc3589x_keypad_close; error = matrix_keypad_build_keymap(plat->keymap_data, NULL, TC3589x_MAX_KPROW, TC3589x_MAX_KPCOL, NULL, input); if (error) { dev_err(&pdev->dev, "Failed to build keymap\n"); return error; } keypad->keymap = input->keycode; input_set_capability(input, EV_MSC, MSC_SCAN); if (!plat->no_autorepeat) __set_bit(EV_REP, input->evbit); input_set_drvdata(input, keypad); tc3589x_keypad_disable(keypad); error = devm_request_threaded_irq(&pdev->dev, irq, NULL, tc3589x_keypad_irq, plat->irqtype | IRQF_ONESHOT, "tc3589x-keypad", keypad); if (error) { dev_err(&pdev->dev, "Could not allocate irq %d,error %d\n", irq, error); return error; } error = input_register_device(input); if (error) { dev_err(&pdev->dev, "Could not register input device\n"); return error; } /* let platform decide if keypad is a wakeup source or not */ device_init_wakeup(&pdev->dev, plat->enable_wakeup); device_set_wakeup_capable(&pdev->dev, plat->enable_wakeup); platform_set_drvdata(pdev, keypad); return 0; } #ifdef CONFIG_PM_SLEEP static int tc3589x_keypad_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct tc_keypad *keypad = platform_get_drvdata(pdev); int irq = platform_get_irq(pdev, 0); /* keypad is already off; we do nothing */ if (keypad->keypad_stopped) return 0; /* if device is not a wakeup source, disable it for powersave */ if (!device_may_wakeup(&pdev->dev)) tc3589x_keypad_disable(keypad); else enable_irq_wake(irq); return 0; } static int tc3589x_keypad_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct tc_keypad *keypad = platform_get_drvdata(pdev); int irq = platform_get_irq(pdev, 0); if (!keypad->keypad_stopped) return 0; /* enable the device to resume normal operations */ if (!device_may_wakeup(&pdev->dev)) tc3589x_keypad_enable(keypad); else disable_irq_wake(irq); return 0; } #endif static SIMPLE_DEV_PM_OPS(tc3589x_keypad_dev_pm_ops, tc3589x_keypad_suspend, tc3589x_keypad_resume); static struct platform_driver tc3589x_keypad_driver = { .driver = { .name = "tc3589x-keypad", .pm = &tc3589x_keypad_dev_pm_ops, }, .probe = tc3589x_keypad_probe, }; module_platform_driver(tc3589x_keypad_driver); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Jayeeta Banerjee/Sundar Iyer"); MODULE_DESCRIPTION("TC35893 Keypad Driver"); MODULE_ALIAS("platform:tc3589x-keypad");
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