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. 334ed0e032SJens Thiele * 344ed0e032SJens Thiele * s.a. A20 User Manual "1.15 TP" (Documentation/arm/sunxi/README) 354ed0e032SJens Thiele * (looks like the description in the A20 User Manual v1.3 is better 364ed0e032SJens Thiele * than the one in the A10 User Manual v.1.5) 376decea7cSHans de Goede */ 386decea7cSHans de Goede 396decea7cSHans de Goede #include <linux/err.h> 40f09f98d3SHans de Goede #include <linux/hwmon.h> 4122369710SChen-Yu Tsai #include <linux/thermal.h> 426decea7cSHans de Goede #include <linux/init.h> 436decea7cSHans de Goede #include <linux/input.h> 446decea7cSHans de Goede #include <linux/interrupt.h> 456decea7cSHans de Goede #include <linux/io.h> 466decea7cSHans de Goede #include <linux/module.h> 476decea7cSHans de Goede #include <linux/of_platform.h> 486decea7cSHans de Goede #include <linux/platform_device.h> 496decea7cSHans de Goede #include <linux/slab.h> 506decea7cSHans de Goede 516decea7cSHans de Goede #define TP_CTRL0 0x00 526decea7cSHans de Goede #define TP_CTRL1 0x04 536decea7cSHans de Goede #define TP_CTRL2 0x08 546decea7cSHans de Goede #define TP_CTRL3 0x0c 556decea7cSHans de Goede #define TP_INT_FIFOC 0x10 566decea7cSHans de Goede #define TP_INT_FIFOS 0x14 576decea7cSHans de Goede #define TP_TPR 0x18 586decea7cSHans de Goede #define TP_CDAT 0x1c 596decea7cSHans de Goede #define TEMP_DATA 0x20 606decea7cSHans de Goede #define TP_DATA 0x24 616decea7cSHans de Goede 626decea7cSHans de Goede /* TP_CTRL0 bits */ 636decea7cSHans de Goede #define ADC_FIRST_DLY(x) ((x) << 24) /* 8 bits */ 646decea7cSHans de Goede #define ADC_FIRST_DLY_MODE(x) ((x) << 23) 656decea7cSHans de Goede #define ADC_CLK_SEL(x) ((x) << 22) 666decea7cSHans de Goede #define ADC_CLK_DIV(x) ((x) << 20) /* 3 bits */ 676decea7cSHans de Goede #define FS_DIV(x) ((x) << 16) /* 4 bits */ 686decea7cSHans de Goede #define T_ACQ(x) ((x) << 0) /* 16 bits */ 696decea7cSHans de Goede 706decea7cSHans de Goede /* TP_CTRL1 bits */ 716decea7cSHans de Goede #define STYLUS_UP_DEBOUN(x) ((x) << 12) /* 8 bits */ 726decea7cSHans de Goede #define STYLUS_UP_DEBOUN_EN(x) ((x) << 9) 736decea7cSHans de Goede #define TOUCH_PAN_CALI_EN(x) ((x) << 6) 746decea7cSHans de Goede #define TP_DUAL_EN(x) ((x) << 5) 756decea7cSHans de Goede #define TP_MODE_EN(x) ((x) << 4) 766decea7cSHans de Goede #define TP_ADC_SELECT(x) ((x) << 3) 776decea7cSHans de Goede #define ADC_CHAN_SELECT(x) ((x) << 0) /* 3 bits */ 786decea7cSHans de Goede 7943c0e223SChen-Yu Tsai /* on sun6i, bits 3~6 are left shifted by 1 to 4~7 */ 8043c0e223SChen-Yu Tsai #define SUN6I_TP_MODE_EN(x) ((x) << 5) 8143c0e223SChen-Yu Tsai 826decea7cSHans de Goede /* TP_CTRL2 bits */ 836decea7cSHans de Goede #define TP_SENSITIVE_ADJUST(x) ((x) << 28) /* 4 bits */ 846decea7cSHans de Goede #define TP_MODE_SELECT(x) ((x) << 26) /* 2 bits */ 856decea7cSHans de Goede #define PRE_MEA_EN(x) ((x) << 24) 866decea7cSHans de Goede #define PRE_MEA_THRE_CNT(x) ((x) << 0) /* 24 bits */ 876decea7cSHans de Goede 886decea7cSHans de Goede /* TP_CTRL3 bits */ 896decea7cSHans de Goede #define FILTER_EN(x) ((x) << 2) 906decea7cSHans de Goede #define FILTER_TYPE(x) ((x) << 0) /* 2 bits */ 916decea7cSHans de Goede 926decea7cSHans de Goede /* TP_INT_FIFOC irq and fifo mask / control bits */ 936decea7cSHans de Goede #define TEMP_IRQ_EN(x) ((x) << 18) 946decea7cSHans de Goede #define OVERRUN_IRQ_EN(x) ((x) << 17) 956decea7cSHans de Goede #define DATA_IRQ_EN(x) ((x) << 16) 966decea7cSHans de Goede #define TP_DATA_XY_CHANGE(x) ((x) << 13) 976decea7cSHans de Goede #define FIFO_TRIG(x) ((x) << 8) /* 5 bits */ 986decea7cSHans de Goede #define DATA_DRQ_EN(x) ((x) << 7) 996decea7cSHans de Goede #define FIFO_FLUSH(x) ((x) << 4) 1006decea7cSHans de Goede #define TP_UP_IRQ_EN(x) ((x) << 1) 1016decea7cSHans de Goede #define TP_DOWN_IRQ_EN(x) ((x) << 0) 1026decea7cSHans de Goede 1036decea7cSHans de Goede /* TP_INT_FIFOS irq and fifo status bits */ 1046decea7cSHans de Goede #define TEMP_DATA_PENDING BIT(18) 1056decea7cSHans de Goede #define FIFO_OVERRUN_PENDING BIT(17) 1066decea7cSHans de Goede #define FIFO_DATA_PENDING BIT(16) 1076decea7cSHans de Goede #define TP_IDLE_FLG BIT(2) 1086decea7cSHans de Goede #define TP_UP_PENDING BIT(1) 1096decea7cSHans de Goede #define TP_DOWN_PENDING BIT(0) 1106decea7cSHans de Goede 1116decea7cSHans de Goede /* TP_TPR bits */ 1126decea7cSHans de Goede #define TEMP_ENABLE(x) ((x) << 16) 1136decea7cSHans de Goede #define TEMP_PERIOD(x) ((x) << 0) /* t = x * 256 * 16 / clkin */ 1146decea7cSHans de Goede 1156decea7cSHans de Goede struct sun4i_ts_data { 1166decea7cSHans de Goede struct device *dev; 1176decea7cSHans de Goede struct input_dev *input; 11822369710SChen-Yu Tsai struct thermal_zone_device *tz; 1196decea7cSHans de Goede void __iomem *base; 1206decea7cSHans de Goede unsigned int irq; 1216decea7cSHans de Goede bool ignore_fifo_data; 122f09f98d3SHans de Goede int temp_data; 12343c0e223SChen-Yu Tsai int temp_offset; 12443c0e223SChen-Yu Tsai int temp_step; 1256decea7cSHans de Goede }; 1266decea7cSHans de Goede 127f09f98d3SHans de Goede static void sun4i_ts_irq_handle_input(struct sun4i_ts_data *ts, u32 reg_val) 1286decea7cSHans de Goede { 129f09f98d3SHans de Goede u32 x, y; 1306decea7cSHans de Goede 1316decea7cSHans de Goede if (reg_val & FIFO_DATA_PENDING) { 1326decea7cSHans de Goede x = readl(ts->base + TP_DATA); 1336decea7cSHans de Goede y = readl(ts->base + TP_DATA); 1346decea7cSHans de Goede /* The 1st location reported after an up event is unreliable */ 1356decea7cSHans de Goede if (!ts->ignore_fifo_data) { 1366decea7cSHans de Goede input_report_abs(ts->input, ABS_X, x); 1376decea7cSHans de Goede input_report_abs(ts->input, ABS_Y, y); 1386decea7cSHans de Goede /* 1396decea7cSHans de Goede * The hardware has a separate down status bit, but 1406decea7cSHans de Goede * that gets set before we get the first location, 1416decea7cSHans de Goede * resulting in reporting a click on the old location. 1426decea7cSHans de Goede */ 1436decea7cSHans de Goede input_report_key(ts->input, BTN_TOUCH, 1); 1446decea7cSHans de Goede input_sync(ts->input); 1456decea7cSHans de Goede } else { 1466decea7cSHans de Goede ts->ignore_fifo_data = false; 1476decea7cSHans de Goede } 1486decea7cSHans de Goede } 1496decea7cSHans de Goede 1506decea7cSHans de Goede if (reg_val & TP_UP_PENDING) { 1516decea7cSHans de Goede ts->ignore_fifo_data = true; 1526decea7cSHans de Goede input_report_key(ts->input, BTN_TOUCH, 0); 1536decea7cSHans de Goede input_sync(ts->input); 1546decea7cSHans de Goede } 155f09f98d3SHans de Goede } 156f09f98d3SHans de Goede 157f09f98d3SHans de Goede static irqreturn_t sun4i_ts_irq(int irq, void *dev_id) 158f09f98d3SHans de Goede { 159f09f98d3SHans de Goede struct sun4i_ts_data *ts = dev_id; 160f09f98d3SHans de Goede u32 reg_val; 161f09f98d3SHans de Goede 162f09f98d3SHans de Goede reg_val = readl(ts->base + TP_INT_FIFOS); 163f09f98d3SHans de Goede 164f09f98d3SHans de Goede if (reg_val & TEMP_DATA_PENDING) 165f09f98d3SHans de Goede ts->temp_data = readl(ts->base + TEMP_DATA); 166f09f98d3SHans de Goede 167f09f98d3SHans de Goede if (ts->input) 168f09f98d3SHans de Goede sun4i_ts_irq_handle_input(ts, reg_val); 1696decea7cSHans de Goede 1706decea7cSHans de Goede writel(reg_val, ts->base + TP_INT_FIFOS); 1716decea7cSHans de Goede 1726decea7cSHans de Goede return IRQ_HANDLED; 1736decea7cSHans de Goede } 1746decea7cSHans de Goede 1756decea7cSHans de Goede static int sun4i_ts_open(struct input_dev *dev) 1766decea7cSHans de Goede { 1776decea7cSHans de Goede struct sun4i_ts_data *ts = input_get_drvdata(dev); 1786decea7cSHans de Goede 179f09f98d3SHans de Goede /* Flush, set trig level to 1, enable temp, data and up irqs */ 180f09f98d3SHans de Goede writel(TEMP_IRQ_EN(1) | DATA_IRQ_EN(1) | FIFO_TRIG(1) | FIFO_FLUSH(1) | 181f09f98d3SHans de Goede TP_UP_IRQ_EN(1), ts->base + TP_INT_FIFOC); 1826decea7cSHans de Goede 1836decea7cSHans de Goede return 0; 1846decea7cSHans de Goede } 1856decea7cSHans de Goede 1866decea7cSHans de Goede static void sun4i_ts_close(struct input_dev *dev) 1876decea7cSHans de Goede { 1886decea7cSHans de Goede struct sun4i_ts_data *ts = input_get_drvdata(dev); 1896decea7cSHans de Goede 190f09f98d3SHans de Goede /* Deactivate all input IRQs */ 191f09f98d3SHans de Goede writel(TEMP_IRQ_EN(1), ts->base + TP_INT_FIFOC); 1926decea7cSHans de Goede } 1936decea7cSHans de Goede 19417e8351aSSascha Hauer static int sun4i_get_temp(const struct sun4i_ts_data *ts, int *temp) 195f09f98d3SHans de Goede { 196f09f98d3SHans de Goede /* No temp_data until the first irq */ 197f09f98d3SHans de Goede if (ts->temp_data == -1) 198f09f98d3SHans de Goede return -EAGAIN; 199f09f98d3SHans de Goede 200877bef7dSHans de Goede *temp = ts->temp_data * ts->temp_step - ts->temp_offset; 20122369710SChen-Yu Tsai 20222369710SChen-Yu Tsai return 0; 20322369710SChen-Yu Tsai } 20422369710SChen-Yu Tsai 20517e8351aSSascha Hauer static int sun4i_get_tz_temp(void *data, int *temp) 20622369710SChen-Yu Tsai { 20722369710SChen-Yu Tsai return sun4i_get_temp(data, temp); 20822369710SChen-Yu Tsai } 20922369710SChen-Yu Tsai 21022369710SChen-Yu Tsai static struct thermal_zone_of_device_ops sun4i_ts_tz_ops = { 21122369710SChen-Yu Tsai .get_temp = sun4i_get_tz_temp, 21222369710SChen-Yu Tsai }; 21322369710SChen-Yu Tsai 21422369710SChen-Yu Tsai static ssize_t show_temp(struct device *dev, struct device_attribute *devattr, 21522369710SChen-Yu Tsai char *buf) 21622369710SChen-Yu Tsai { 21722369710SChen-Yu Tsai struct sun4i_ts_data *ts = dev_get_drvdata(dev); 21817e8351aSSascha Hauer int temp; 21922369710SChen-Yu Tsai int error; 22022369710SChen-Yu Tsai 22122369710SChen-Yu Tsai error = sun4i_get_temp(ts, &temp); 22222369710SChen-Yu Tsai if (error) 22322369710SChen-Yu Tsai return error; 22422369710SChen-Yu Tsai 22517e8351aSSascha Hauer return sprintf(buf, "%d\n", temp); 226f09f98d3SHans de Goede } 227f09f98d3SHans de Goede 228f09f98d3SHans de Goede static ssize_t show_temp_label(struct device *dev, 229f09f98d3SHans de Goede struct device_attribute *devattr, char *buf) 230f09f98d3SHans de Goede { 231f09f98d3SHans de Goede return sprintf(buf, "SoC temperature\n"); 232f09f98d3SHans de Goede } 233f09f98d3SHans de Goede 234f09f98d3SHans de Goede static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); 235f09f98d3SHans de Goede static DEVICE_ATTR(temp1_label, S_IRUGO, show_temp_label, NULL); 236f09f98d3SHans de Goede 237f09f98d3SHans de Goede static struct attribute *sun4i_ts_attrs[] = { 238f09f98d3SHans de Goede &dev_attr_temp1_input.attr, 239f09f98d3SHans de Goede &dev_attr_temp1_label.attr, 240f09f98d3SHans de Goede NULL 241f09f98d3SHans de Goede }; 242f09f98d3SHans de Goede ATTRIBUTE_GROUPS(sun4i_ts); 243f09f98d3SHans de Goede 2446decea7cSHans de Goede static int sun4i_ts_probe(struct platform_device *pdev) 2456decea7cSHans de Goede { 2466decea7cSHans de Goede struct sun4i_ts_data *ts; 2476decea7cSHans de Goede struct device *dev = &pdev->dev; 248f09f98d3SHans de Goede struct device_node *np = dev->of_node; 249f09f98d3SHans de Goede struct device *hwmon; 2506decea7cSHans de Goede int error; 25143c0e223SChen-Yu Tsai u32 reg; 252f09f98d3SHans de Goede bool ts_attached; 2534ed0e032SJens Thiele u32 tp_sensitive_adjust = 15; 2544ed0e032SJens Thiele u32 filter_type = 1; 2556decea7cSHans de Goede 2566decea7cSHans de Goede ts = devm_kzalloc(dev, sizeof(struct sun4i_ts_data), GFP_KERNEL); 2576decea7cSHans de Goede if (!ts) 2586decea7cSHans de Goede return -ENOMEM; 2596decea7cSHans de Goede 2606decea7cSHans de Goede ts->dev = dev; 2616decea7cSHans de Goede ts->ignore_fifo_data = true; 262f09f98d3SHans de Goede ts->temp_data = -1; 26343c0e223SChen-Yu Tsai if (of_device_is_compatible(np, "allwinner,sun6i-a31-ts")) { 264877bef7dSHans de Goede /* Allwinner SDK has temperature (C) = (value / 6) - 271 */ 265877bef7dSHans de Goede ts->temp_offset = 271000; 26643c0e223SChen-Yu Tsai ts->temp_step = 167; 26791c68a7cSHans de Goede } else if (of_device_is_compatible(np, "allwinner,sun4i-a10-ts")) { 26891c68a7cSHans de Goede /* 26991c68a7cSHans de Goede * The A10 temperature sensor has quite a wide spread, these 27091c68a7cSHans de Goede * parameters are based on the averaging of the calibration 27191c68a7cSHans de Goede * results of 4 completely different boards, with a spread of 272877bef7dSHans de Goede * temp_step from 0.096 - 0.170 and temp_offset from 176 - 331. 27391c68a7cSHans de Goede */ 274877bef7dSHans de Goede ts->temp_offset = 257000; 27591c68a7cSHans de Goede ts->temp_step = 133; 27643c0e223SChen-Yu Tsai } else { 27743c0e223SChen-Yu Tsai /* 27843c0e223SChen-Yu Tsai * The user manuals do not contain the formula for calculating 27943c0e223SChen-Yu Tsai * the temperature. The formula used here is from the AXP209, 28043c0e223SChen-Yu Tsai * which is designed by X-Powers, an affiliate of Allwinner: 28143c0e223SChen-Yu Tsai * 282877bef7dSHans de Goede * temperature (C) = (value * 0.1) - 144.7 28343c0e223SChen-Yu Tsai * 28443c0e223SChen-Yu Tsai * Allwinner does not have any documentation whatsoever for 28543c0e223SChen-Yu Tsai * this hardware. Moreover, it is claimed that the sensor 28643c0e223SChen-Yu Tsai * is inaccurate and cannot work properly. 28743c0e223SChen-Yu Tsai */ 288877bef7dSHans de Goede ts->temp_offset = 144700; 28943c0e223SChen-Yu Tsai ts->temp_step = 100; 29043c0e223SChen-Yu Tsai } 2916decea7cSHans de Goede 292f09f98d3SHans de Goede ts_attached = of_property_read_bool(np, "allwinner,ts-attached"); 293f09f98d3SHans de Goede if (ts_attached) { 2946decea7cSHans de Goede ts->input = devm_input_allocate_device(dev); 2956decea7cSHans de Goede if (!ts->input) 2966decea7cSHans de Goede return -ENOMEM; 2976decea7cSHans de Goede 2986decea7cSHans de Goede ts->input->name = pdev->name; 2996decea7cSHans de Goede ts->input->phys = "sun4i_ts/input0"; 3006decea7cSHans de Goede ts->input->open = sun4i_ts_open; 3016decea7cSHans de Goede ts->input->close = sun4i_ts_close; 3026decea7cSHans de Goede ts->input->id.bustype = BUS_HOST; 3036decea7cSHans de Goede ts->input->id.vendor = 0x0001; 3046decea7cSHans de Goede ts->input->id.product = 0x0001; 3056decea7cSHans de Goede ts->input->id.version = 0x0100; 3066decea7cSHans de Goede ts->input->evbit[0] = BIT(EV_SYN) | BIT(EV_KEY) | BIT(EV_ABS); 3076decea7cSHans de Goede __set_bit(BTN_TOUCH, ts->input->keybit); 3086decea7cSHans de Goede input_set_abs_params(ts->input, ABS_X, 0, 4095, 0, 0); 3096decea7cSHans de Goede input_set_abs_params(ts->input, ABS_Y, 0, 4095, 0, 0); 3106decea7cSHans de Goede input_set_drvdata(ts->input, ts); 311f09f98d3SHans de Goede } 3126decea7cSHans de Goede 3136decea7cSHans de Goede ts->base = devm_ioremap_resource(dev, 3146decea7cSHans de Goede platform_get_resource(pdev, IORESOURCE_MEM, 0)); 3156decea7cSHans de Goede if (IS_ERR(ts->base)) 3166decea7cSHans de Goede return PTR_ERR(ts->base); 3176decea7cSHans de Goede 3186decea7cSHans de Goede ts->irq = platform_get_irq(pdev, 0); 3196decea7cSHans de Goede error = devm_request_irq(dev, ts->irq, sun4i_ts_irq, 0, "sun4i-ts", ts); 3206decea7cSHans de Goede if (error) 3216decea7cSHans de Goede return error; 3226decea7cSHans de Goede 3236decea7cSHans de Goede /* 3246decea7cSHans de Goede * Select HOSC clk, clkin = clk / 6, adc samplefreq = clkin / 8192, 3256decea7cSHans de Goede * t_acq = clkin / (16 * 64) 3266decea7cSHans de Goede */ 3276decea7cSHans de Goede writel(ADC_CLK_SEL(0) | ADC_CLK_DIV(2) | FS_DIV(7) | T_ACQ(63), 3286decea7cSHans de Goede ts->base + TP_CTRL0); 3296decea7cSHans de Goede 3306decea7cSHans de Goede /* 3314ed0e032SJens Thiele * tp_sensitive_adjust is an optional property 3326decea7cSHans de Goede * tp_mode = 0 : only x and y coordinates, as we don't use dual touch 3336decea7cSHans de Goede */ 3344ed0e032SJens Thiele of_property_read_u32(np, "allwinner,tp-sensitive-adjust", 3354ed0e032SJens Thiele &tp_sensitive_adjust); 3364ed0e032SJens Thiele writel(TP_SENSITIVE_ADJUST(tp_sensitive_adjust) | TP_MODE_SELECT(0), 3376decea7cSHans de Goede ts->base + TP_CTRL2); 3386decea7cSHans de Goede 3394ed0e032SJens Thiele /* 3404ed0e032SJens Thiele * Enable median and averaging filter, optional property for 3414ed0e032SJens Thiele * filter type. 3424ed0e032SJens Thiele */ 3434ed0e032SJens Thiele of_property_read_u32(np, "allwinner,filter-type", &filter_type); 3444ed0e032SJens Thiele writel(FILTER_EN(1) | FILTER_TYPE(filter_type), ts->base + TP_CTRL3); 3456decea7cSHans de Goede 3466decea7cSHans de Goede /* Enable temperature measurement, period 1953 (2 seconds) */ 3476decea7cSHans de Goede writel(TEMP_ENABLE(1) | TEMP_PERIOD(1953), ts->base + TP_TPR); 3486decea7cSHans de Goede 3496decea7cSHans de Goede /* 3506decea7cSHans de Goede * Set stylus up debounce to aprox 10 ms, enable debounce, and 3516decea7cSHans de Goede * finally enable tp mode. 3526decea7cSHans de Goede */ 35343c0e223SChen-Yu Tsai reg = STYLUS_UP_DEBOUN(5) | STYLUS_UP_DEBOUN_EN(1); 35491c68a7cSHans de Goede if (of_device_is_compatible(np, "allwinner,sun6i-a31-ts")) 35543c0e223SChen-Yu Tsai reg |= SUN6I_TP_MODE_EN(1); 35691c68a7cSHans de Goede else 35791c68a7cSHans de Goede reg |= TP_MODE_EN(1); 35843c0e223SChen-Yu Tsai writel(reg, ts->base + TP_CTRL1); 3596decea7cSHans de Goede 36022369710SChen-Yu Tsai /* 36122369710SChen-Yu Tsai * The thermal core does not register hwmon devices for DT-based 36222369710SChen-Yu Tsai * thermal zone sensors, such as this one. 36322369710SChen-Yu Tsai */ 364f09f98d3SHans de Goede hwmon = devm_hwmon_device_register_with_groups(ts->dev, "sun4i_ts", 365f09f98d3SHans de Goede ts, sun4i_ts_groups); 366f09f98d3SHans de Goede if (IS_ERR(hwmon)) 367f09f98d3SHans de Goede return PTR_ERR(hwmon); 368f09f98d3SHans de Goede 36922369710SChen-Yu Tsai ts->tz = thermal_zone_of_sensor_register(ts->dev, 0, ts, 37022369710SChen-Yu Tsai &sun4i_ts_tz_ops); 37122369710SChen-Yu Tsai if (IS_ERR(ts->tz)) 37222369710SChen-Yu Tsai ts->tz = NULL; 37322369710SChen-Yu Tsai 374f09f98d3SHans de Goede writel(TEMP_IRQ_EN(1), ts->base + TP_INT_FIFOC); 375f09f98d3SHans de Goede 376f09f98d3SHans de Goede if (ts_attached) { 3776decea7cSHans de Goede error = input_register_device(ts->input); 378f09f98d3SHans de Goede if (error) { 379f09f98d3SHans de Goede writel(0, ts->base + TP_INT_FIFOC); 38022369710SChen-Yu Tsai thermal_zone_of_sensor_unregister(ts->dev, ts->tz); 3816decea7cSHans de Goede return error; 382f09f98d3SHans de Goede } 383f09f98d3SHans de Goede } 3846decea7cSHans de Goede 3856decea7cSHans de Goede platform_set_drvdata(pdev, ts); 3866decea7cSHans de Goede return 0; 3876decea7cSHans de Goede } 3886decea7cSHans de Goede 389f09f98d3SHans de Goede static int sun4i_ts_remove(struct platform_device *pdev) 390f09f98d3SHans de Goede { 391f09f98d3SHans de Goede struct sun4i_ts_data *ts = platform_get_drvdata(pdev); 392f09f98d3SHans de Goede 393f09f98d3SHans de Goede /* Explicit unregister to avoid open/close changing the imask later */ 394f09f98d3SHans de Goede if (ts->input) 395f09f98d3SHans de Goede input_unregister_device(ts->input); 396f09f98d3SHans de Goede 39722369710SChen-Yu Tsai thermal_zone_of_sensor_unregister(ts->dev, ts->tz); 39822369710SChen-Yu Tsai 399f09f98d3SHans de Goede /* Deactivate all IRQs */ 400f09f98d3SHans de Goede writel(0, ts->base + TP_INT_FIFOC); 401f09f98d3SHans de Goede 402f09f98d3SHans de Goede return 0; 403f09f98d3SHans de Goede } 404f09f98d3SHans de Goede 4056decea7cSHans de Goede static const struct of_device_id sun4i_ts_of_match[] = { 4066decea7cSHans de Goede { .compatible = "allwinner,sun4i-a10-ts", }, 40791c68a7cSHans de Goede { .compatible = "allwinner,sun5i-a13-ts", }, 40843c0e223SChen-Yu Tsai { .compatible = "allwinner,sun6i-a31-ts", }, 4096decea7cSHans de Goede { /* sentinel */ } 4106decea7cSHans de Goede }; 4116decea7cSHans de Goede MODULE_DEVICE_TABLE(of, sun4i_ts_of_match); 4126decea7cSHans de Goede 4136decea7cSHans de Goede static struct platform_driver sun4i_ts_driver = { 4146decea7cSHans de Goede .driver = { 4156decea7cSHans de Goede .name = "sun4i-ts", 4166decea7cSHans de Goede .of_match_table = of_match_ptr(sun4i_ts_of_match), 4176decea7cSHans de Goede }, 4186decea7cSHans de Goede .probe = sun4i_ts_probe, 419f09f98d3SHans de Goede .remove = sun4i_ts_remove, 4206decea7cSHans de Goede }; 4216decea7cSHans de Goede 4226decea7cSHans de Goede module_platform_driver(sun4i_ts_driver); 4236decea7cSHans de Goede 4246decea7cSHans de Goede MODULE_DESCRIPTION("Allwinner sun4i resistive touchscreen controller driver"); 4256decea7cSHans de Goede MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 4266decea7cSHans de Goede MODULE_LICENSE("GPL"); 427