16decea7cSHans de Goede /* 26decea7cSHans de Goede * Allwinner sunxi resistive touchscreen controller driver 36decea7cSHans de Goede * 46decea7cSHans de Goede * Copyright (C) 2013 - 2014 Hans de Goede <hdegoede@redhat.com> 56decea7cSHans de Goede * 6f09f98d3SHans de Goede * The hwmon parts are based on work by Corentin LABBE which is: 7f09f98d3SHans de Goede * Copyright (C) 2013 Corentin LABBE <clabbe.montjoie@gmail.com> 8f09f98d3SHans de Goede * 96decea7cSHans de Goede * This program is free software; you can redistribute it and/or modify 106decea7cSHans de Goede * it under the terms of the GNU General Public License as published by 116decea7cSHans de Goede * the Free Software Foundation; either version 2 of the License, or 126decea7cSHans de Goede * (at your option) any later version. 136decea7cSHans de Goede * 146decea7cSHans de Goede * This program is distributed in the hope that it will be useful, 156decea7cSHans de Goede * but WITHOUT ANY WARRANTY; without even the implied warranty of 166decea7cSHans de Goede * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 176decea7cSHans de Goede * GNU General Public License for more details. 186decea7cSHans de Goede */ 196decea7cSHans de Goede 206decea7cSHans de Goede /* 216decea7cSHans de Goede * The sun4i-ts controller is capable of detecting a second touch, but when a 226decea7cSHans de Goede * second touch is present then the accuracy becomes so bad the reported touch 236decea7cSHans de Goede * location is not useable. 246decea7cSHans de Goede * 256decea7cSHans de Goede * The original android driver contains some complicated heuristics using the 266decea7cSHans de Goede * aprox. distance between the 2 touches to see if the user is making a pinch 276decea7cSHans de Goede * open / close movement, and then reports emulated multi-touch events around 286decea7cSHans de Goede * the last touch coordinate (as the dual-touch coordinates are worthless). 296decea7cSHans de Goede * 306decea7cSHans de Goede * These kinds of heuristics are just asking for trouble (and don't belong 316decea7cSHans de Goede * in the kernel). So this driver offers straight forward, reliable single 326decea7cSHans de Goede * touch functionality only. 336decea7cSHans de Goede */ 346decea7cSHans de Goede 356decea7cSHans de Goede #include <linux/err.h> 36f09f98d3SHans de Goede #include <linux/hwmon.h> 3722369710SChen-Yu Tsai #include <linux/thermal.h> 386decea7cSHans de Goede #include <linux/init.h> 396decea7cSHans de Goede #include <linux/input.h> 406decea7cSHans de Goede #include <linux/interrupt.h> 416decea7cSHans de Goede #include <linux/io.h> 426decea7cSHans de Goede #include <linux/module.h> 436decea7cSHans de Goede #include <linux/of_platform.h> 446decea7cSHans de Goede #include <linux/platform_device.h> 456decea7cSHans de Goede #include <linux/slab.h> 466decea7cSHans de Goede 476decea7cSHans de Goede #define TP_CTRL0 0x00 486decea7cSHans de Goede #define TP_CTRL1 0x04 496decea7cSHans de Goede #define TP_CTRL2 0x08 506decea7cSHans de Goede #define TP_CTRL3 0x0c 516decea7cSHans de Goede #define TP_INT_FIFOC 0x10 526decea7cSHans de Goede #define TP_INT_FIFOS 0x14 536decea7cSHans de Goede #define TP_TPR 0x18 546decea7cSHans de Goede #define TP_CDAT 0x1c 556decea7cSHans de Goede #define TEMP_DATA 0x20 566decea7cSHans de Goede #define TP_DATA 0x24 576decea7cSHans de Goede 586decea7cSHans de Goede /* TP_CTRL0 bits */ 596decea7cSHans de Goede #define ADC_FIRST_DLY(x) ((x) << 24) /* 8 bits */ 606decea7cSHans de Goede #define ADC_FIRST_DLY_MODE(x) ((x) << 23) 616decea7cSHans de Goede #define ADC_CLK_SEL(x) ((x) << 22) 626decea7cSHans de Goede #define ADC_CLK_DIV(x) ((x) << 20) /* 3 bits */ 636decea7cSHans de Goede #define FS_DIV(x) ((x) << 16) /* 4 bits */ 646decea7cSHans de Goede #define T_ACQ(x) ((x) << 0) /* 16 bits */ 656decea7cSHans de Goede 666decea7cSHans de Goede /* TP_CTRL1 bits */ 676decea7cSHans de Goede #define STYLUS_UP_DEBOUN(x) ((x) << 12) /* 8 bits */ 686decea7cSHans de Goede #define STYLUS_UP_DEBOUN_EN(x) ((x) << 9) 696decea7cSHans de Goede #define TOUCH_PAN_CALI_EN(x) ((x) << 6) 706decea7cSHans de Goede #define TP_DUAL_EN(x) ((x) << 5) 716decea7cSHans de Goede #define TP_MODE_EN(x) ((x) << 4) 726decea7cSHans de Goede #define TP_ADC_SELECT(x) ((x) << 3) 736decea7cSHans de Goede #define ADC_CHAN_SELECT(x) ((x) << 0) /* 3 bits */ 746decea7cSHans de Goede 7543c0e223SChen-Yu Tsai /* on sun6i, bits 3~6 are left shifted by 1 to 4~7 */ 7643c0e223SChen-Yu Tsai #define SUN6I_TP_MODE_EN(x) ((x) << 5) 7743c0e223SChen-Yu Tsai 786decea7cSHans de Goede /* TP_CTRL2 bits */ 796decea7cSHans de Goede #define TP_SENSITIVE_ADJUST(x) ((x) << 28) /* 4 bits */ 806decea7cSHans de Goede #define TP_MODE_SELECT(x) ((x) << 26) /* 2 bits */ 816decea7cSHans de Goede #define PRE_MEA_EN(x) ((x) << 24) 826decea7cSHans de Goede #define PRE_MEA_THRE_CNT(x) ((x) << 0) /* 24 bits */ 836decea7cSHans de Goede 846decea7cSHans de Goede /* TP_CTRL3 bits */ 856decea7cSHans de Goede #define FILTER_EN(x) ((x) << 2) 866decea7cSHans de Goede #define FILTER_TYPE(x) ((x) << 0) /* 2 bits */ 876decea7cSHans de Goede 886decea7cSHans de Goede /* TP_INT_FIFOC irq and fifo mask / control bits */ 896decea7cSHans de Goede #define TEMP_IRQ_EN(x) ((x) << 18) 906decea7cSHans de Goede #define OVERRUN_IRQ_EN(x) ((x) << 17) 916decea7cSHans de Goede #define DATA_IRQ_EN(x) ((x) << 16) 926decea7cSHans de Goede #define TP_DATA_XY_CHANGE(x) ((x) << 13) 936decea7cSHans de Goede #define FIFO_TRIG(x) ((x) << 8) /* 5 bits */ 946decea7cSHans de Goede #define DATA_DRQ_EN(x) ((x) << 7) 956decea7cSHans de Goede #define FIFO_FLUSH(x) ((x) << 4) 966decea7cSHans de Goede #define TP_UP_IRQ_EN(x) ((x) << 1) 976decea7cSHans de Goede #define TP_DOWN_IRQ_EN(x) ((x) << 0) 986decea7cSHans de Goede 996decea7cSHans de Goede /* TP_INT_FIFOS irq and fifo status bits */ 1006decea7cSHans de Goede #define TEMP_DATA_PENDING BIT(18) 1016decea7cSHans de Goede #define FIFO_OVERRUN_PENDING BIT(17) 1026decea7cSHans de Goede #define FIFO_DATA_PENDING BIT(16) 1036decea7cSHans de Goede #define TP_IDLE_FLG BIT(2) 1046decea7cSHans de Goede #define TP_UP_PENDING BIT(1) 1056decea7cSHans de Goede #define TP_DOWN_PENDING BIT(0) 1066decea7cSHans de Goede 1076decea7cSHans de Goede /* TP_TPR bits */ 1086decea7cSHans de Goede #define TEMP_ENABLE(x) ((x) << 16) 1096decea7cSHans de Goede #define TEMP_PERIOD(x) ((x) << 0) /* t = x * 256 * 16 / clkin */ 1106decea7cSHans de Goede 1116decea7cSHans de Goede struct sun4i_ts_data { 1126decea7cSHans de Goede struct device *dev; 1136decea7cSHans de Goede struct input_dev *input; 11422369710SChen-Yu Tsai struct thermal_zone_device *tz; 1156decea7cSHans de Goede void __iomem *base; 1166decea7cSHans de Goede unsigned int irq; 1176decea7cSHans de Goede bool ignore_fifo_data; 118f09f98d3SHans de Goede int temp_data; 11943c0e223SChen-Yu Tsai int temp_offset; 12043c0e223SChen-Yu Tsai int temp_step; 1216decea7cSHans de Goede }; 1226decea7cSHans de Goede 123f09f98d3SHans de Goede static void sun4i_ts_irq_handle_input(struct sun4i_ts_data *ts, u32 reg_val) 1246decea7cSHans de Goede { 125f09f98d3SHans de Goede u32 x, y; 1266decea7cSHans de Goede 1276decea7cSHans de Goede if (reg_val & FIFO_DATA_PENDING) { 1286decea7cSHans de Goede x = readl(ts->base + TP_DATA); 1296decea7cSHans de Goede y = readl(ts->base + TP_DATA); 1306decea7cSHans de Goede /* The 1st location reported after an up event is unreliable */ 1316decea7cSHans de Goede if (!ts->ignore_fifo_data) { 1326decea7cSHans de Goede input_report_abs(ts->input, ABS_X, x); 1336decea7cSHans de Goede input_report_abs(ts->input, ABS_Y, y); 1346decea7cSHans de Goede /* 1356decea7cSHans de Goede * The hardware has a separate down status bit, but 1366decea7cSHans de Goede * that gets set before we get the first location, 1376decea7cSHans de Goede * resulting in reporting a click on the old location. 1386decea7cSHans de Goede */ 1396decea7cSHans de Goede input_report_key(ts->input, BTN_TOUCH, 1); 1406decea7cSHans de Goede input_sync(ts->input); 1416decea7cSHans de Goede } else { 1426decea7cSHans de Goede ts->ignore_fifo_data = false; 1436decea7cSHans de Goede } 1446decea7cSHans de Goede } 1456decea7cSHans de Goede 1466decea7cSHans de Goede if (reg_val & TP_UP_PENDING) { 1476decea7cSHans de Goede ts->ignore_fifo_data = true; 1486decea7cSHans de Goede input_report_key(ts->input, BTN_TOUCH, 0); 1496decea7cSHans de Goede input_sync(ts->input); 1506decea7cSHans de Goede } 151f09f98d3SHans de Goede } 152f09f98d3SHans de Goede 153f09f98d3SHans de Goede static irqreturn_t sun4i_ts_irq(int irq, void *dev_id) 154f09f98d3SHans de Goede { 155f09f98d3SHans de Goede struct sun4i_ts_data *ts = dev_id; 156f09f98d3SHans de Goede u32 reg_val; 157f09f98d3SHans de Goede 158f09f98d3SHans de Goede reg_val = readl(ts->base + TP_INT_FIFOS); 159f09f98d3SHans de Goede 160f09f98d3SHans de Goede if (reg_val & TEMP_DATA_PENDING) 161f09f98d3SHans de Goede ts->temp_data = readl(ts->base + TEMP_DATA); 162f09f98d3SHans de Goede 163f09f98d3SHans de Goede if (ts->input) 164f09f98d3SHans de Goede sun4i_ts_irq_handle_input(ts, reg_val); 1656decea7cSHans de Goede 1666decea7cSHans de Goede writel(reg_val, ts->base + TP_INT_FIFOS); 1676decea7cSHans de Goede 1686decea7cSHans de Goede return IRQ_HANDLED; 1696decea7cSHans de Goede } 1706decea7cSHans de Goede 1716decea7cSHans de Goede static int sun4i_ts_open(struct input_dev *dev) 1726decea7cSHans de Goede { 1736decea7cSHans de Goede struct sun4i_ts_data *ts = input_get_drvdata(dev); 1746decea7cSHans de Goede 175f09f98d3SHans de Goede /* Flush, set trig level to 1, enable temp, data and up irqs */ 176f09f98d3SHans de Goede writel(TEMP_IRQ_EN(1) | DATA_IRQ_EN(1) | FIFO_TRIG(1) | FIFO_FLUSH(1) | 177f09f98d3SHans de Goede TP_UP_IRQ_EN(1), ts->base + TP_INT_FIFOC); 1786decea7cSHans de Goede 1796decea7cSHans de Goede return 0; 1806decea7cSHans de Goede } 1816decea7cSHans de Goede 1826decea7cSHans de Goede static void sun4i_ts_close(struct input_dev *dev) 1836decea7cSHans de Goede { 1846decea7cSHans de Goede struct sun4i_ts_data *ts = input_get_drvdata(dev); 1856decea7cSHans de Goede 186f09f98d3SHans de Goede /* Deactivate all input IRQs */ 187f09f98d3SHans de Goede writel(TEMP_IRQ_EN(1), ts->base + TP_INT_FIFOC); 1886decea7cSHans de Goede } 1896decea7cSHans de Goede 19022369710SChen-Yu Tsai static int sun4i_get_temp(const struct sun4i_ts_data *ts, long *temp) 191f09f98d3SHans de Goede { 192f09f98d3SHans de Goede /* No temp_data until the first irq */ 193f09f98d3SHans de Goede if (ts->temp_data == -1) 194f09f98d3SHans de Goede return -EAGAIN; 195f09f98d3SHans de Goede 19643c0e223SChen-Yu Tsai *temp = (ts->temp_data - ts->temp_offset) * ts->temp_step; 19722369710SChen-Yu Tsai 19822369710SChen-Yu Tsai return 0; 19922369710SChen-Yu Tsai } 20022369710SChen-Yu Tsai 20122369710SChen-Yu Tsai static int sun4i_get_tz_temp(void *data, long *temp) 20222369710SChen-Yu Tsai { 20322369710SChen-Yu Tsai return sun4i_get_temp(data, temp); 20422369710SChen-Yu Tsai } 20522369710SChen-Yu Tsai 20622369710SChen-Yu Tsai static struct thermal_zone_of_device_ops sun4i_ts_tz_ops = { 20722369710SChen-Yu Tsai .get_temp = sun4i_get_tz_temp, 20822369710SChen-Yu Tsai }; 20922369710SChen-Yu Tsai 21022369710SChen-Yu Tsai static ssize_t show_temp(struct device *dev, struct device_attribute *devattr, 21122369710SChen-Yu Tsai char *buf) 21222369710SChen-Yu Tsai { 21322369710SChen-Yu Tsai struct sun4i_ts_data *ts = dev_get_drvdata(dev); 21422369710SChen-Yu Tsai long temp; 21522369710SChen-Yu Tsai int error; 21622369710SChen-Yu Tsai 21722369710SChen-Yu Tsai error = sun4i_get_temp(ts, &temp); 21822369710SChen-Yu Tsai if (error) 21922369710SChen-Yu Tsai return error; 22022369710SChen-Yu Tsai 22122369710SChen-Yu Tsai return sprintf(buf, "%ld\n", temp); 222f09f98d3SHans de Goede } 223f09f98d3SHans de Goede 224f09f98d3SHans de Goede static ssize_t show_temp_label(struct device *dev, 225f09f98d3SHans de Goede struct device_attribute *devattr, char *buf) 226f09f98d3SHans de Goede { 227f09f98d3SHans de Goede return sprintf(buf, "SoC temperature\n"); 228f09f98d3SHans de Goede } 229f09f98d3SHans de Goede 230f09f98d3SHans de Goede static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); 231f09f98d3SHans de Goede static DEVICE_ATTR(temp1_label, S_IRUGO, show_temp_label, NULL); 232f09f98d3SHans de Goede 233f09f98d3SHans de Goede static struct attribute *sun4i_ts_attrs[] = { 234f09f98d3SHans de Goede &dev_attr_temp1_input.attr, 235f09f98d3SHans de Goede &dev_attr_temp1_label.attr, 236f09f98d3SHans de Goede NULL 237f09f98d3SHans de Goede }; 238f09f98d3SHans de Goede ATTRIBUTE_GROUPS(sun4i_ts); 239f09f98d3SHans de Goede 2406decea7cSHans de Goede static int sun4i_ts_probe(struct platform_device *pdev) 2416decea7cSHans de Goede { 2426decea7cSHans de Goede struct sun4i_ts_data *ts; 2436decea7cSHans de Goede struct device *dev = &pdev->dev; 244f09f98d3SHans de Goede struct device_node *np = dev->of_node; 245f09f98d3SHans de Goede struct device *hwmon; 2466decea7cSHans de Goede int error; 24743c0e223SChen-Yu Tsai u32 reg; 248f09f98d3SHans de Goede bool ts_attached; 2496decea7cSHans de Goede 2506decea7cSHans de Goede ts = devm_kzalloc(dev, sizeof(struct sun4i_ts_data), GFP_KERNEL); 2516decea7cSHans de Goede if (!ts) 2526decea7cSHans de Goede return -ENOMEM; 2536decea7cSHans de Goede 2546decea7cSHans de Goede ts->dev = dev; 2556decea7cSHans de Goede ts->ignore_fifo_data = true; 256f09f98d3SHans de Goede ts->temp_data = -1; 25743c0e223SChen-Yu Tsai if (of_device_is_compatible(np, "allwinner,sun6i-a31-ts")) { 25843c0e223SChen-Yu Tsai /* Allwinner SDK has temperature = -271 + (value / 6) (C) */ 25943c0e223SChen-Yu Tsai ts->temp_offset = 1626; 26043c0e223SChen-Yu Tsai ts->temp_step = 167; 26191c68a7cSHans de Goede } else if (of_device_is_compatible(np, "allwinner,sun4i-a10-ts")) { 26291c68a7cSHans de Goede /* 26391c68a7cSHans de Goede * The A10 temperature sensor has quite a wide spread, these 26491c68a7cSHans de Goede * parameters are based on the averaging of the calibration 26591c68a7cSHans de Goede * results of 4 completely different boards, with a spread of 26691c68a7cSHans de Goede * temp_step from 96 - 170 and temp_offset from 1758 - 3310. 26791c68a7cSHans de Goede */ 26891c68a7cSHans de Goede ts->temp_offset = 2570; 26991c68a7cSHans de Goede ts->temp_step = 133; 27043c0e223SChen-Yu Tsai } else { 27143c0e223SChen-Yu Tsai /* 27243c0e223SChen-Yu Tsai * The user manuals do not contain the formula for calculating 27343c0e223SChen-Yu Tsai * the temperature. The formula used here is from the AXP209, 27443c0e223SChen-Yu Tsai * which is designed by X-Powers, an affiliate of Allwinner: 27543c0e223SChen-Yu Tsai * 27643c0e223SChen-Yu Tsai * temperature = -144.7 + (value * 0.1) 27743c0e223SChen-Yu Tsai * 27843c0e223SChen-Yu Tsai * Allwinner does not have any documentation whatsoever for 27943c0e223SChen-Yu Tsai * this hardware. Moreover, it is claimed that the sensor 28043c0e223SChen-Yu Tsai * is inaccurate and cannot work properly. 28143c0e223SChen-Yu Tsai */ 28243c0e223SChen-Yu Tsai ts->temp_offset = 1447; 28343c0e223SChen-Yu Tsai ts->temp_step = 100; 28443c0e223SChen-Yu Tsai } 2856decea7cSHans de Goede 286f09f98d3SHans de Goede ts_attached = of_property_read_bool(np, "allwinner,ts-attached"); 287f09f98d3SHans de Goede if (ts_attached) { 2886decea7cSHans de Goede ts->input = devm_input_allocate_device(dev); 2896decea7cSHans de Goede if (!ts->input) 2906decea7cSHans de Goede return -ENOMEM; 2916decea7cSHans de Goede 2926decea7cSHans de Goede ts->input->name = pdev->name; 2936decea7cSHans de Goede ts->input->phys = "sun4i_ts/input0"; 2946decea7cSHans de Goede ts->input->open = sun4i_ts_open; 2956decea7cSHans de Goede ts->input->close = sun4i_ts_close; 2966decea7cSHans de Goede ts->input->id.bustype = BUS_HOST; 2976decea7cSHans de Goede ts->input->id.vendor = 0x0001; 2986decea7cSHans de Goede ts->input->id.product = 0x0001; 2996decea7cSHans de Goede ts->input->id.version = 0x0100; 3006decea7cSHans de Goede ts->input->evbit[0] = BIT(EV_SYN) | BIT(EV_KEY) | BIT(EV_ABS); 3016decea7cSHans de Goede __set_bit(BTN_TOUCH, ts->input->keybit); 3026decea7cSHans de Goede input_set_abs_params(ts->input, ABS_X, 0, 4095, 0, 0); 3036decea7cSHans de Goede input_set_abs_params(ts->input, ABS_Y, 0, 4095, 0, 0); 3046decea7cSHans de Goede input_set_drvdata(ts->input, ts); 305f09f98d3SHans de Goede } 3066decea7cSHans de Goede 3076decea7cSHans de Goede ts->base = devm_ioremap_resource(dev, 3086decea7cSHans de Goede platform_get_resource(pdev, IORESOURCE_MEM, 0)); 3096decea7cSHans de Goede if (IS_ERR(ts->base)) 3106decea7cSHans de Goede return PTR_ERR(ts->base); 3116decea7cSHans de Goede 3126decea7cSHans de Goede ts->irq = platform_get_irq(pdev, 0); 3136decea7cSHans de Goede error = devm_request_irq(dev, ts->irq, sun4i_ts_irq, 0, "sun4i-ts", ts); 3146decea7cSHans de Goede if (error) 3156decea7cSHans de Goede return error; 3166decea7cSHans de Goede 3176decea7cSHans de Goede /* 3186decea7cSHans de Goede * Select HOSC clk, clkin = clk / 6, adc samplefreq = clkin / 8192, 3196decea7cSHans de Goede * t_acq = clkin / (16 * 64) 3206decea7cSHans de Goede */ 3216decea7cSHans de Goede writel(ADC_CLK_SEL(0) | ADC_CLK_DIV(2) | FS_DIV(7) | T_ACQ(63), 3226decea7cSHans de Goede ts->base + TP_CTRL0); 3236decea7cSHans de Goede 3246decea7cSHans de Goede /* 3256decea7cSHans de Goede * sensitive_adjust = 15 : max, which is not all that sensitive, 3266decea7cSHans de Goede * tp_mode = 0 : only x and y coordinates, as we don't use dual touch 3276decea7cSHans de Goede */ 3286decea7cSHans de Goede writel(TP_SENSITIVE_ADJUST(15) | TP_MODE_SELECT(0), 3296decea7cSHans de Goede ts->base + TP_CTRL2); 3306decea7cSHans de Goede 3316decea7cSHans de Goede /* Enable median filter, type 1 : 5/3 */ 3326decea7cSHans de Goede writel(FILTER_EN(1) | FILTER_TYPE(1), ts->base + TP_CTRL3); 3336decea7cSHans de Goede 3346decea7cSHans de Goede /* Enable temperature measurement, period 1953 (2 seconds) */ 3356decea7cSHans de Goede writel(TEMP_ENABLE(1) | TEMP_PERIOD(1953), ts->base + TP_TPR); 3366decea7cSHans de Goede 3376decea7cSHans de Goede /* 3386decea7cSHans de Goede * Set stylus up debounce to aprox 10 ms, enable debounce, and 3396decea7cSHans de Goede * finally enable tp mode. 3406decea7cSHans de Goede */ 34143c0e223SChen-Yu Tsai reg = STYLUS_UP_DEBOUN(5) | STYLUS_UP_DEBOUN_EN(1); 34291c68a7cSHans de Goede if (of_device_is_compatible(np, "allwinner,sun6i-a31-ts")) 34343c0e223SChen-Yu Tsai reg |= SUN6I_TP_MODE_EN(1); 34491c68a7cSHans de Goede else 34591c68a7cSHans de Goede reg |= TP_MODE_EN(1); 34643c0e223SChen-Yu Tsai writel(reg, ts->base + TP_CTRL1); 3476decea7cSHans de Goede 34822369710SChen-Yu Tsai /* 34922369710SChen-Yu Tsai * The thermal core does not register hwmon devices for DT-based 35022369710SChen-Yu Tsai * thermal zone sensors, such as this one. 35122369710SChen-Yu Tsai */ 352f09f98d3SHans de Goede hwmon = devm_hwmon_device_register_with_groups(ts->dev, "sun4i_ts", 353f09f98d3SHans de Goede ts, sun4i_ts_groups); 354f09f98d3SHans de Goede if (IS_ERR(hwmon)) 355f09f98d3SHans de Goede return PTR_ERR(hwmon); 356f09f98d3SHans de Goede 35722369710SChen-Yu Tsai ts->tz = thermal_zone_of_sensor_register(ts->dev, 0, ts, 35822369710SChen-Yu Tsai &sun4i_ts_tz_ops); 35922369710SChen-Yu Tsai if (IS_ERR(ts->tz)) 36022369710SChen-Yu Tsai ts->tz = NULL; 36122369710SChen-Yu Tsai 362f09f98d3SHans de Goede writel(TEMP_IRQ_EN(1), ts->base + TP_INT_FIFOC); 363f09f98d3SHans de Goede 364f09f98d3SHans de Goede if (ts_attached) { 3656decea7cSHans de Goede error = input_register_device(ts->input); 366f09f98d3SHans de Goede if (error) { 367f09f98d3SHans de Goede writel(0, ts->base + TP_INT_FIFOC); 36822369710SChen-Yu Tsai thermal_zone_of_sensor_unregister(ts->dev, ts->tz); 3696decea7cSHans de Goede return error; 370f09f98d3SHans de Goede } 371f09f98d3SHans de Goede } 3726decea7cSHans de Goede 3736decea7cSHans de Goede platform_set_drvdata(pdev, ts); 3746decea7cSHans de Goede return 0; 3756decea7cSHans de Goede } 3766decea7cSHans de Goede 377f09f98d3SHans de Goede static int sun4i_ts_remove(struct platform_device *pdev) 378f09f98d3SHans de Goede { 379f09f98d3SHans de Goede struct sun4i_ts_data *ts = platform_get_drvdata(pdev); 380f09f98d3SHans de Goede 381f09f98d3SHans de Goede /* Explicit unregister to avoid open/close changing the imask later */ 382f09f98d3SHans de Goede if (ts->input) 383f09f98d3SHans de Goede input_unregister_device(ts->input); 384f09f98d3SHans de Goede 38522369710SChen-Yu Tsai thermal_zone_of_sensor_unregister(ts->dev, ts->tz); 38622369710SChen-Yu Tsai 387f09f98d3SHans de Goede /* Deactivate all IRQs */ 388f09f98d3SHans de Goede writel(0, ts->base + TP_INT_FIFOC); 389f09f98d3SHans de Goede 390f09f98d3SHans de Goede return 0; 391f09f98d3SHans de Goede } 392f09f98d3SHans de Goede 3936decea7cSHans de Goede static const struct of_device_id sun4i_ts_of_match[] = { 3946decea7cSHans de Goede { .compatible = "allwinner,sun4i-a10-ts", }, 39591c68a7cSHans de Goede { .compatible = "allwinner,sun5i-a13-ts", }, 39643c0e223SChen-Yu Tsai { .compatible = "allwinner,sun6i-a31-ts", }, 3976decea7cSHans de Goede { /* sentinel */ } 3986decea7cSHans de Goede }; 3996decea7cSHans de Goede MODULE_DEVICE_TABLE(of, sun4i_ts_of_match); 4006decea7cSHans de Goede 4016decea7cSHans de Goede static struct platform_driver sun4i_ts_driver = { 4026decea7cSHans de Goede .driver = { 4036decea7cSHans de Goede .name = "sun4i-ts", 4046decea7cSHans de Goede .of_match_table = of_match_ptr(sun4i_ts_of_match), 4056decea7cSHans de Goede }, 4066decea7cSHans de Goede .probe = sun4i_ts_probe, 407f09f98d3SHans de Goede .remove = sun4i_ts_remove, 4086decea7cSHans de Goede }; 4096decea7cSHans de Goede 4106decea7cSHans de Goede module_platform_driver(sun4i_ts_driver); 4116decea7cSHans de Goede 4126decea7cSHans de Goede MODULE_DESCRIPTION("Allwinner sun4i resistive touchscreen controller driver"); 4136decea7cSHans de Goede MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 4146decea7cSHans de Goede MODULE_LICENSE("GPL"); 415