^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2013 Daniel Tang <tangrs@tangrs.id.au>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/input/matrix_keypad.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define KEYPAD_SCAN_MODE 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define KEYPAD_CNTL 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define KEYPAD_INT 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define KEYPAD_INTMSK 0x0C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define KEYPAD_DATA 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define KEYPAD_GPIO 0x30
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define KEYPAD_UNKNOWN_INT 0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define KEYPAD_UNKNOWN_INT_STS 0x44
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define KEYPAD_BITMASK_COLS 11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define KEYPAD_BITMASK_ROWS 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct nspire_keypad {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) void __iomem *reg_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) u32 int_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct clk *clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct matrix_keymap_data *keymap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) int row_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /* Maximum delay estimated assuming 33MHz APB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) u32 scan_interval; /* In microseconds (~2000us max) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) u32 row_delay; /* In microseconds (~500us max) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) u16 state[KEYPAD_BITMASK_ROWS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) bool active_low;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static irqreturn_t nspire_keypad_irq(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct nspire_keypad *keypad = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct input_dev *input = keypad->input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) unsigned short *keymap = input->keycode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) unsigned int code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) int row, col;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) u32 int_sts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) u16 state[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) u16 bits, changed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) int_sts = readl(keypad->reg_base + KEYPAD_INT) & keypad->int_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (!int_sts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) memcpy_fromio(state, keypad->reg_base + KEYPAD_DATA, sizeof(state));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) for (row = 0; row < KEYPAD_BITMASK_ROWS; row++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) bits = state[row];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (keypad->active_low)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) bits = ~bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) changed = bits ^ keypad->state[row];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (!changed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) keypad->state[row] = bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) for (col = 0; col < KEYPAD_BITMASK_COLS; col++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (!(changed & (1U << col)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) code = MATRIX_SCAN_CODE(row, col, keypad->row_shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) input_event(input, EV_MSC, MSC_SCAN, code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) input_report_key(input, keymap[code],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) bits & (1U << col));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) input_sync(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) writel(0x3, keypad->reg_base + KEYPAD_INT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) static int nspire_keypad_open(struct input_dev *input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct nspire_keypad *keypad = input_get_drvdata(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) unsigned long val = 0, cycles_per_us, delay_cycles, row_delay_cycles;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) error = clk_prepare_enable(keypad->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) cycles_per_us = (clk_get_rate(keypad->clk) / 1000000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (cycles_per_us == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) cycles_per_us = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) delay_cycles = cycles_per_us * keypad->scan_interval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) WARN_ON(delay_cycles >= (1 << 16)); /* Overflow */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) delay_cycles &= 0xffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) row_delay_cycles = cycles_per_us * keypad->row_delay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) WARN_ON(row_delay_cycles >= (1 << 14)); /* Overflow */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) row_delay_cycles &= 0x3fff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) val |= 3 << 0; /* Set scan mode to 3 (continuous scan) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) val |= row_delay_cycles << 2; /* Delay between scanning each row */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) val |= delay_cycles << 16; /* Delay between scans */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) writel(val, keypad->reg_base + KEYPAD_SCAN_MODE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) val = (KEYPAD_BITMASK_ROWS & 0xff) | (KEYPAD_BITMASK_COLS & 0xff)<<8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) writel(val, keypad->reg_base + KEYPAD_CNTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /* Enable interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) keypad->int_mask = 1 << 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) writel(keypad->int_mask, keypad->reg_base + KEYPAD_INTMSK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static void nspire_keypad_close(struct input_dev *input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct nspire_keypad *keypad = input_get_drvdata(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) /* Disable interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) writel(0, keypad->reg_base + KEYPAD_INTMSK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /* Acknowledge existing interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) writel(~0, keypad->reg_base + KEYPAD_INT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) clk_disable_unprepare(keypad->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) static int nspire_keypad_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) const struct device_node *of_node = pdev->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct nspire_keypad *keypad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (irq < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) keypad = devm_kzalloc(&pdev->dev, sizeof(struct nspire_keypad),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) if (!keypad) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) dev_err(&pdev->dev, "failed to allocate keypad memory\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) keypad->row_shift = get_count_order(KEYPAD_BITMASK_COLS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) error = of_property_read_u32(of_node, "scan-interval",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) &keypad->scan_interval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) dev_err(&pdev->dev, "failed to get scan-interval\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) error = of_property_read_u32(of_node, "row-delay",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) &keypad->row_delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) dev_err(&pdev->dev, "failed to get row-delay\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) keypad->active_low = of_property_read_bool(of_node, "active-low");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) keypad->clk = devm_clk_get(&pdev->dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (IS_ERR(keypad->clk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) dev_err(&pdev->dev, "unable to get clock\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) return PTR_ERR(keypad->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) keypad->reg_base = devm_ioremap_resource(&pdev->dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (IS_ERR(keypad->reg_base))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) return PTR_ERR(keypad->reg_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) keypad->input = input = devm_input_allocate_device(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (!input) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) dev_err(&pdev->dev, "failed to allocate input device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) error = clk_prepare_enable(keypad->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) dev_err(&pdev->dev, "failed to enable clock\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) /* Disable interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) writel(0, keypad->reg_base + KEYPAD_INTMSK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /* Acknowledge existing interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) writel(~0, keypad->reg_base + KEYPAD_INT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) /* Disable GPIO interrupts to prevent hanging on touchpad */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) /* Possibly used to detect touchpad events */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) writel(0, keypad->reg_base + KEYPAD_UNKNOWN_INT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) /* Acknowledge existing GPIO interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) writel(~0, keypad->reg_base + KEYPAD_UNKNOWN_INT_STS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) clk_disable_unprepare(keypad->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) input_set_drvdata(input, keypad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) input->id.bustype = BUS_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) input->name = "nspire-keypad";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) input->open = nspire_keypad_open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) input->close = nspire_keypad_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) __set_bit(EV_KEY, input->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) __set_bit(EV_REP, input->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) input_set_capability(input, EV_MSC, MSC_SCAN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) error = matrix_keypad_build_keymap(NULL, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) KEYPAD_BITMASK_ROWS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) KEYPAD_BITMASK_COLS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) NULL, input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) dev_err(&pdev->dev, "building keymap failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) error = devm_request_irq(&pdev->dev, irq, nspire_keypad_irq, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) "nspire_keypad", keypad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) dev_err(&pdev->dev, "allocate irq %d failed\n", irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) error = input_register_device(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) dev_err(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) "unable to register input device: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) dev_dbg(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) "TI-NSPIRE keypad at %pR (scan_interval=%uus, row_delay=%uus%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) res, keypad->row_delay, keypad->scan_interval,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) keypad->active_low ? ", active_low" : "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static const struct of_device_id nspire_keypad_dt_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) { .compatible = "ti,nspire-keypad" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) MODULE_DEVICE_TABLE(of, nspire_keypad_dt_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static struct platform_driver nspire_keypad_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) .name = "nspire-keypad",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) .of_match_table = nspire_keypad_dt_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) .probe = nspire_keypad_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) module_platform_driver(nspire_keypad_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) MODULE_DESCRIPTION("TI-NSPIRE Keypad Driver");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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