1*3bda759fSMiquel Raynal // SPDX-License-Identifier: GPL-2.0-only 201636eb9SPatil, Rachna /* 301636eb9SPatil, Rachna * TI Touch Screen / ADC MFD driver 401636eb9SPatil, Rachna * 54f4ed454SAlexander A. Klimov * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/ 601636eb9SPatil, Rachna */ 701636eb9SPatil, Rachna 801636eb9SPatil, Rachna #include <linux/module.h> 901636eb9SPatil, Rachna #include <linux/slab.h> 1001636eb9SPatil, Rachna #include <linux/err.h> 1101636eb9SPatil, Rachna #include <linux/io.h> 1201636eb9SPatil, Rachna #include <linux/clk.h> 1301636eb9SPatil, Rachna #include <linux/regmap.h> 1401636eb9SPatil, Rachna #include <linux/mfd/core.h> 1501636eb9SPatil, Rachna #include <linux/pm_runtime.h> 16a6543a1cSPatil, Rachna #include <linux/of.h> 17a6543a1cSPatil, Rachna #include <linux/of_device.h> 187ca6740cSSebastian Andrzej Siewior #include <linux/sched.h> 1901636eb9SPatil, Rachna 2001636eb9SPatil, Rachna #include <linux/mfd/ti_am335x_tscadc.h> 2101636eb9SPatil, Rachna 2201636eb9SPatil, Rachna static const struct regmap_config tscadc_regmap_config = { 2301636eb9SPatil, Rachna .name = "ti_tscadc", 2401636eb9SPatil, Rachna .reg_bits = 32, 2501636eb9SPatil, Rachna .reg_stride = 4, 2601636eb9SPatil, Rachna .val_bits = 32, 2701636eb9SPatil, Rachna }; 2801636eb9SPatil, Rachna 29a318b7d0SAndrew F. Davis void am335x_tsc_se_set_cache(struct ti_tscadc_dev *tscadc, u32 val) 30abeccee4SPatil, Rachna { 31317b2099SSebastian Andrzej Siewior unsigned long flags; 32317b2099SSebastian Andrzej Siewior 33a318b7d0SAndrew F. Davis spin_lock_irqsave(&tscadc->reg_lock, flags); 34a318b7d0SAndrew F. Davis tscadc->reg_se_cache |= val; 35a318b7d0SAndrew F. Davis if (tscadc->adc_waiting) 36a318b7d0SAndrew F. Davis wake_up(&tscadc->reg_se_wait); 37a318b7d0SAndrew F. Davis else if (!tscadc->adc_in_use) 380d3a7cceSAndrew F. Davis regmap_write(tscadc->regmap, REG_SE, tscadc->reg_se_cache); 397ca6740cSSebastian Andrzej Siewior 40a318b7d0SAndrew F. Davis spin_unlock_irqrestore(&tscadc->reg_lock, flags); 41abeccee4SPatil, Rachna } 427e170c6eSSebastian Andrzej Siewior EXPORT_SYMBOL_GPL(am335x_tsc_se_set_cache); 437e170c6eSSebastian Andrzej Siewior 44a318b7d0SAndrew F. Davis static void am335x_tscadc_need_adc(struct ti_tscadc_dev *tscadc) 457ca6740cSSebastian Andrzej Siewior { 467ca6740cSSebastian Andrzej Siewior DEFINE_WAIT(wait); 477ca6740cSSebastian Andrzej Siewior u32 reg; 487ca6740cSSebastian Andrzej Siewior 490d3a7cceSAndrew F. Davis regmap_read(tscadc->regmap, REG_ADCFSM, ®); 507ca6740cSSebastian Andrzej Siewior if (reg & SEQ_STATUS) { 51a318b7d0SAndrew F. Davis tscadc->adc_waiting = true; 52a318b7d0SAndrew F. Davis prepare_to_wait(&tscadc->reg_se_wait, &wait, 537ca6740cSSebastian Andrzej Siewior TASK_UNINTERRUPTIBLE); 54a318b7d0SAndrew F. Davis spin_unlock_irq(&tscadc->reg_lock); 557ca6740cSSebastian Andrzej Siewior 567ca6740cSSebastian Andrzej Siewior schedule(); 577ca6740cSSebastian Andrzej Siewior 58a318b7d0SAndrew F. Davis spin_lock_irq(&tscadc->reg_lock); 59a318b7d0SAndrew F. Davis finish_wait(&tscadc->reg_se_wait, &wait); 607ca6740cSSebastian Andrzej Siewior 61b10848e6SVignesh R /* 62b10848e6SVignesh R * Sequencer should either be idle or 63b10848e6SVignesh R * busy applying the charge step. 64b10848e6SVignesh R */ 650d3a7cceSAndrew F. Davis regmap_read(tscadc->regmap, REG_ADCFSM, ®); 66b10848e6SVignesh R WARN_ON((reg & SEQ_STATUS) && !(reg & CHARGE_STEP)); 67a318b7d0SAndrew F. Davis tscadc->adc_waiting = false; 687ca6740cSSebastian Andrzej Siewior } 69a318b7d0SAndrew F. Davis tscadc->adc_in_use = true; 707ca6740cSSebastian Andrzej Siewior } 717ca6740cSSebastian Andrzej Siewior 72a318b7d0SAndrew F. Davis void am335x_tsc_se_set_once(struct ti_tscadc_dev *tscadc, u32 val) 737e170c6eSSebastian Andrzej Siewior { 74a318b7d0SAndrew F. Davis spin_lock_irq(&tscadc->reg_lock); 75a318b7d0SAndrew F. Davis am335x_tscadc_need_adc(tscadc); 767ca6740cSSebastian Andrzej Siewior 770d3a7cceSAndrew F. Davis regmap_write(tscadc->regmap, REG_SE, val); 78a318b7d0SAndrew F. Davis spin_unlock_irq(&tscadc->reg_lock); 797ca6740cSSebastian Andrzej Siewior } 807ca6740cSSebastian Andrzej Siewior EXPORT_SYMBOL_GPL(am335x_tsc_se_set_once); 817ca6740cSSebastian Andrzej Siewior 82a318b7d0SAndrew F. Davis void am335x_tsc_se_adc_done(struct ti_tscadc_dev *tscadc) 837ca6740cSSebastian Andrzej Siewior { 847e170c6eSSebastian Andrzej Siewior unsigned long flags; 857e170c6eSSebastian Andrzej Siewior 86a318b7d0SAndrew F. Davis spin_lock_irqsave(&tscadc->reg_lock, flags); 87a318b7d0SAndrew F. Davis tscadc->adc_in_use = false; 880d3a7cceSAndrew F. Davis regmap_write(tscadc->regmap, REG_SE, tscadc->reg_se_cache); 89a318b7d0SAndrew F. Davis spin_unlock_irqrestore(&tscadc->reg_lock, flags); 907e170c6eSSebastian Andrzej Siewior } 917ca6740cSSebastian Andrzej Siewior EXPORT_SYMBOL_GPL(am335x_tsc_se_adc_done); 92abeccee4SPatil, Rachna 93a318b7d0SAndrew F. Davis void am335x_tsc_se_clr(struct ti_tscadc_dev *tscadc, u32 val) 94abeccee4SPatil, Rachna { 95317b2099SSebastian Andrzej Siewior unsigned long flags; 96317b2099SSebastian Andrzej Siewior 97a318b7d0SAndrew F. Davis spin_lock_irqsave(&tscadc->reg_lock, flags); 98a318b7d0SAndrew F. Davis tscadc->reg_se_cache &= ~val; 990d3a7cceSAndrew F. Davis regmap_write(tscadc->regmap, REG_SE, tscadc->reg_se_cache); 100a318b7d0SAndrew F. Davis spin_unlock_irqrestore(&tscadc->reg_lock, flags); 101abeccee4SPatil, Rachna } 102abeccee4SPatil, Rachna EXPORT_SYMBOL_GPL(am335x_tsc_se_clr); 103abeccee4SPatil, Rachna 104a318b7d0SAndrew F. Davis static void tscadc_idle_config(struct ti_tscadc_dev *tscadc) 10501636eb9SPatil, Rachna { 10601636eb9SPatil, Rachna unsigned int idleconfig; 10701636eb9SPatil, Rachna 10801636eb9SPatil, Rachna idleconfig = STEPCONFIG_YNN | STEPCONFIG_INM_ADCREFM | 10901636eb9SPatil, Rachna STEPCONFIG_INP_ADCREFM | STEPCONFIG_YPN; 11001636eb9SPatil, Rachna 1110d3a7cceSAndrew F. Davis regmap_write(tscadc->regmap, REG_IDLECONFIG, idleconfig); 11201636eb9SPatil, Rachna } 11301636eb9SPatil, Rachna 114612b95cdSGreg Kroah-Hartman static int ti_tscadc_probe(struct platform_device *pdev) 11501636eb9SPatil, Rachna { 11601636eb9SPatil, Rachna struct ti_tscadc_dev *tscadc; 11701636eb9SPatil, Rachna struct resource *res; 11801636eb9SPatil, Rachna struct clk *clk; 119e368866eSColin Ian King struct device_node *node; 1202b99bafaSPatil, Rachna struct mfd_cell *cell; 12118926edeSSebastian Andrzej Siewior struct property *prop; 12218926edeSSebastian Andrzej Siewior const __be32 *cur; 12318926edeSSebastian Andrzej Siewior u32 val; 12401636eb9SPatil, Rachna int err, ctrl; 125e90f8754SMatthias Kaehlcke int clock_rate; 126a6543a1cSPatil, Rachna int tsc_wires = 0, adc_channels = 0, total_channels; 12718926edeSSebastian Andrzej Siewior int readouts = 0; 12801636eb9SPatil, Rachna 1299e5775f3SSebastian Andrzej Siewior if (!pdev->dev.of_node) { 1309e5775f3SSebastian Andrzej Siewior dev_err(&pdev->dev, "Could not find valid DT data.\n"); 13101636eb9SPatil, Rachna return -EINVAL; 13201636eb9SPatil, Rachna } 13301636eb9SPatil, Rachna 134a6543a1cSPatil, Rachna node = of_get_child_by_name(pdev->dev.of_node, "tsc"); 135a6543a1cSPatil, Rachna of_property_read_u32(node, "ti,wires", &tsc_wires); 13618926edeSSebastian Andrzej Siewior of_property_read_u32(node, "ti,coordiante-readouts", &readouts); 13729f95e8bSMiquel Raynal of_node_put(node); 1385e53a69bSPatil, Rachna 139a6543a1cSPatil, Rachna node = of_get_child_by_name(pdev->dev.of_node, "adc"); 14018926edeSSebastian Andrzej Siewior of_property_for_each_u32(node, "ti,adc-channels", prop, cur, val) { 14118926edeSSebastian Andrzej Siewior adc_channels++; 14218926edeSSebastian Andrzej Siewior if (val > 7) { 14318926edeSSebastian Andrzej Siewior dev_err(&pdev->dev, " PIN numbers are 0..7 (not %d)\n", 14418926edeSSebastian Andrzej Siewior val); 14529f95e8bSMiquel Raynal of_node_put(node); 14618926edeSSebastian Andrzej Siewior return -EINVAL; 14718926edeSSebastian Andrzej Siewior } 14818926edeSSebastian Andrzej Siewior } 14929f95e8bSMiquel Raynal 15029f95e8bSMiquel Raynal of_node_put(node); 15129f95e8bSMiquel Raynal 1525e53a69bSPatil, Rachna total_channels = tsc_wires + adc_channels; 1535e53a69bSPatil, Rachna if (total_channels > 8) { 1545e53a69bSPatil, Rachna dev_err(&pdev->dev, "Number of i/p channels more than 8\n"); 1555e53a69bSPatil, Rachna return -EINVAL; 1565e53a69bSPatil, Rachna } 15724d5c82fSPantelis Antoniou if (total_channels == 0) { 15824d5c82fSPantelis Antoniou dev_err(&pdev->dev, "Need atleast one channel.\n"); 15924d5c82fSPantelis Antoniou return -EINVAL; 16024d5c82fSPantelis Antoniou } 1612b99bafaSPatil, Rachna 16218926edeSSebastian Andrzej Siewior if (readouts * 2 + 2 + adc_channels > 16) { 16318926edeSSebastian Andrzej Siewior dev_err(&pdev->dev, "Too many step configurations requested\n"); 16418926edeSSebastian Andrzej Siewior return -EINVAL; 16518926edeSSebastian Andrzej Siewior } 16618926edeSSebastian Andrzej Siewior 16701636eb9SPatil, Rachna /* Allocate memory for device */ 168dea1c703SAndrew F. Davis tscadc = devm_kzalloc(&pdev->dev, sizeof(*tscadc), GFP_KERNEL); 169a2e87feeSMarkus Elfring if (!tscadc) 17001636eb9SPatil, Rachna return -ENOMEM; 171a2e87feeSMarkus Elfring 17201636eb9SPatil, Rachna tscadc->dev = &pdev->dev; 1733c39c9c6SPatil, Rachna 1743c39c9c6SPatil, Rachna err = platform_get_irq(pdev, 0); 175bc239d8dSTang Bin if (err < 0) 1763c39c9c6SPatil, Rachna goto ret; 177bc239d8dSTang Bin else 1783c39c9c6SPatil, Rachna tscadc->irq = err; 17901636eb9SPatil, Rachna 180924ff918SJingoo Han res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 181924ff918SJingoo Han tscadc->tscadc_base = devm_ioremap_resource(&pdev->dev, res); 182924ff918SJingoo Han if (IS_ERR(tscadc->tscadc_base)) 183924ff918SJingoo Han return PTR_ERR(tscadc->tscadc_base); 18401636eb9SPatil, Rachna 185de98a43eSVignesh Raghavendra tscadc->tscadc_phys_base = res->start; 1860d3a7cceSAndrew F. Davis tscadc->regmap = devm_regmap_init_mmio(&pdev->dev, 18701636eb9SPatil, Rachna tscadc->tscadc_base, &tscadc_regmap_config); 1880d3a7cceSAndrew F. Davis if (IS_ERR(tscadc->regmap)) { 18901636eb9SPatil, Rachna dev_err(&pdev->dev, "regmap init failed\n"); 1900d3a7cceSAndrew F. Davis err = PTR_ERR(tscadc->regmap); 1913c39c9c6SPatil, Rachna goto ret; 19201636eb9SPatil, Rachna } 19301636eb9SPatil, Rachna 194abeccee4SPatil, Rachna spin_lock_init(&tscadc->reg_lock); 1957ca6740cSSebastian Andrzej Siewior init_waitqueue_head(&tscadc->reg_se_wait); 1967ca6740cSSebastian Andrzej Siewior 19701636eb9SPatil, Rachna pm_runtime_enable(&pdev->dev); 19801636eb9SPatil, Rachna pm_runtime_get_sync(&pdev->dev); 19901636eb9SPatil, Rachna 20001636eb9SPatil, Rachna /* 20101636eb9SPatil, Rachna * The TSC_ADC_Subsystem has 2 clock domains 20201636eb9SPatil, Rachna * OCP_CLK and ADC_CLK. 20301636eb9SPatil, Rachna * The ADC clock is expected to run at target of 3MHz, 20401636eb9SPatil, Rachna * and expected to capture 12-bit data at a rate of 200 KSPS. 20501636eb9SPatil, Rachna * The TSC_ADC_SS controller design assumes the OCP clock is 20601636eb9SPatil, Rachna * at least 6x faster than the ADC clock. 20701636eb9SPatil, Rachna */ 208c2b1509cSZumeng Chen clk = devm_clk_get(&pdev->dev, "adc_tsc_fck"); 20901636eb9SPatil, Rachna if (IS_ERR(clk)) { 21001636eb9SPatil, Rachna dev_err(&pdev->dev, "failed to get TSC fck\n"); 21101636eb9SPatil, Rachna err = PTR_ERR(clk); 21201636eb9SPatil, Rachna goto err_disable_clk; 21301636eb9SPatil, Rachna } 21401636eb9SPatil, Rachna clock_rate = clk_get_rate(clk); 215e90f8754SMatthias Kaehlcke tscadc->clk_div = clock_rate / ADC_CLK; 216efe3126aSPatil, Rachna 21701636eb9SPatil, Rachna /* TSCADC_CLKDIV needs to be configured to the value minus 1 */ 218e90f8754SMatthias Kaehlcke tscadc->clk_div--; 2190d3a7cceSAndrew F. Davis regmap_write(tscadc->regmap, REG_CLKDIV, tscadc->clk_div); 22001636eb9SPatil, Rachna 22101636eb9SPatil, Rachna /* Set the control register bits */ 222f0933a60SJeff Lance ctrl = CNTRLREG_STEPCONFIGWRT | CNTRLREG_STEPID; 2230d3a7cceSAndrew F. Davis regmap_write(tscadc->regmap, REG_CTRL, ctrl); 22401636eb9SPatil, Rachna 22501636eb9SPatil, Rachna /* Set register bits for Idle Config Mode */ 226f0933a60SJeff Lance if (tsc_wires > 0) { 227f0933a60SJeff Lance tscadc->tsc_wires = tsc_wires; 228f0933a60SJeff Lance if (tsc_wires == 5) 229f0933a60SJeff Lance ctrl |= CNTRLREG_5WIRE | CNTRLREG_TSCENB; 230f0933a60SJeff Lance else 231f0933a60SJeff Lance ctrl |= CNTRLREG_4WIRE | CNTRLREG_TSCENB; 23201636eb9SPatil, Rachna tscadc_idle_config(tscadc); 233f0933a60SJeff Lance } 23401636eb9SPatil, Rachna 23501636eb9SPatil, Rachna /* Enable the TSC module enable bit */ 23601636eb9SPatil, Rachna ctrl |= CNTRLREG_TSCSSENB; 2370d3a7cceSAndrew F. Davis regmap_write(tscadc->regmap, REG_CTRL, ctrl); 23801636eb9SPatil, Rachna 23924d5c82fSPantelis Antoniou tscadc->used_cells = 0; 24024d5c82fSPantelis Antoniou tscadc->tsc_cell = -1; 24124d5c82fSPantelis Antoniou tscadc->adc_cell = -1; 24224d5c82fSPantelis Antoniou 2432b99bafaSPatil, Rachna /* TSC Cell */ 24424d5c82fSPantelis Antoniou if (tsc_wires > 0) { 24524d5c82fSPantelis Antoniou tscadc->tsc_cell = tscadc->used_cells; 24624d5c82fSPantelis Antoniou cell = &tscadc->cells[tscadc->used_cells++]; 2475f184e63SSebastian Andrzej Siewior cell->name = "TI-am335x-tsc"; 2480396310bSPatil, Rachna cell->of_compatible = "ti,am3359-tsc"; 249a9bce1b0SSebastian Andrzej Siewior cell->platform_data = &tscadc; 250a9bce1b0SSebastian Andrzej Siewior cell->pdata_size = sizeof(tscadc); 25124d5c82fSPantelis Antoniou } 2522b99bafaSPatil, Rachna 2535e53a69bSPatil, Rachna /* ADC Cell */ 25424d5c82fSPantelis Antoniou if (adc_channels > 0) { 25524d5c82fSPantelis Antoniou tscadc->adc_cell = tscadc->used_cells; 25624d5c82fSPantelis Antoniou cell = &tscadc->cells[tscadc->used_cells++]; 2579f99928fSSebastian Andrzej Siewior cell->name = "TI-am335x-adc"; 2586f39ac4eSPatil, Rachna cell->of_compatible = "ti,am3359-adc"; 259a9bce1b0SSebastian Andrzej Siewior cell->platform_data = &tscadc; 260a9bce1b0SSebastian Andrzej Siewior cell->pdata_size = sizeof(tscadc); 26124d5c82fSPantelis Antoniou } 2625e53a69bSPatil, Rachna 263b40ee006SVignesh R err = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO, 264b40ee006SVignesh R tscadc->cells, tscadc->used_cells, NULL, 265b40ee006SVignesh R 0, NULL); 26601636eb9SPatil, Rachna if (err < 0) 26701636eb9SPatil, Rachna goto err_disable_clk; 26801636eb9SPatil, Rachna 26901636eb9SPatil, Rachna platform_set_drvdata(pdev, tscadc); 27001636eb9SPatil, Rachna return 0; 27101636eb9SPatil, Rachna 27201636eb9SPatil, Rachna err_disable_clk: 27301636eb9SPatil, Rachna pm_runtime_put_sync(&pdev->dev); 27401636eb9SPatil, Rachna pm_runtime_disable(&pdev->dev); 2753c39c9c6SPatil, Rachna ret: 27601636eb9SPatil, Rachna return err; 27701636eb9SPatil, Rachna } 27801636eb9SPatil, Rachna 279612b95cdSGreg Kroah-Hartman static int ti_tscadc_remove(struct platform_device *pdev) 28001636eb9SPatil, Rachna { 28101636eb9SPatil, Rachna struct ti_tscadc_dev *tscadc = platform_get_drvdata(pdev); 28201636eb9SPatil, Rachna 2830d3a7cceSAndrew F. Davis regmap_write(tscadc->regmap, REG_SE, 0x00); 28401636eb9SPatil, Rachna 28501636eb9SPatil, Rachna pm_runtime_put_sync(&pdev->dev); 28601636eb9SPatil, Rachna pm_runtime_disable(&pdev->dev); 28701636eb9SPatil, Rachna 28801636eb9SPatil, Rachna mfd_remove_devices(tscadc->dev); 28901636eb9SPatil, Rachna 29001636eb9SPatil, Rachna return 0; 29101636eb9SPatil, Rachna } 29201636eb9SPatil, Rachna 293c974ac77SVignesh R static int __maybe_unused ti_tscadc_can_wakeup(struct device *dev, void *data) 294c974ac77SVignesh R { 295c974ac77SVignesh R return device_may_wakeup(dev); 296c974ac77SVignesh R } 297c974ac77SVignesh R 298dae936a0SAndrew F. Davis static int __maybe_unused tscadc_suspend(struct device *dev) 29901636eb9SPatil, Rachna { 300a318b7d0SAndrew F. Davis struct ti_tscadc_dev *tscadc = dev_get_drvdata(dev); 30101636eb9SPatil, Rachna 3020d3a7cceSAndrew F. Davis regmap_write(tscadc->regmap, REG_SE, 0x00); 303c974ac77SVignesh R if (device_for_each_child(dev, NULL, ti_tscadc_can_wakeup)) { 304c974ac77SVignesh R u32 ctrl; 305c974ac77SVignesh R 306c974ac77SVignesh R regmap_read(tscadc->regmap, REG_CTRL, &ctrl); 307c974ac77SVignesh R ctrl &= ~(CNTRLREG_POWERDOWN); 308c974ac77SVignesh R ctrl |= CNTRLREG_TSCSSENB; 309c974ac77SVignesh R regmap_write(tscadc->regmap, REG_CTRL, ctrl); 310c974ac77SVignesh R } 31101636eb9SPatil, Rachna pm_runtime_put_sync(dev); 31201636eb9SPatil, Rachna 31301636eb9SPatil, Rachna return 0; 31401636eb9SPatil, Rachna } 31501636eb9SPatil, Rachna 316dae936a0SAndrew F. Davis static int __maybe_unused tscadc_resume(struct device *dev) 31701636eb9SPatil, Rachna { 318a318b7d0SAndrew F. Davis struct ti_tscadc_dev *tscadc = dev_get_drvdata(dev); 319f0933a60SJeff Lance u32 ctrl; 32001636eb9SPatil, Rachna 32101636eb9SPatil, Rachna pm_runtime_get_sync(dev); 32201636eb9SPatil, Rachna 32301636eb9SPatil, Rachna /* context restore */ 324b5f8b763SPatil, Rachna ctrl = CNTRLREG_STEPCONFIGWRT | CNTRLREG_STEPID; 3250d3a7cceSAndrew F. Davis regmap_write(tscadc->regmap, REG_CTRL, ctrl); 326b5f8b763SPatil, Rachna 327a318b7d0SAndrew F. Davis if (tscadc->tsc_cell != -1) { 328a318b7d0SAndrew F. Davis if (tscadc->tsc_wires == 5) 329f0933a60SJeff Lance ctrl |= CNTRLREG_5WIRE | CNTRLREG_TSCENB; 330f0933a60SJeff Lance else 331f0933a60SJeff Lance ctrl |= CNTRLREG_4WIRE | CNTRLREG_TSCENB; 332a318b7d0SAndrew F. Davis tscadc_idle_config(tscadc); 333f0933a60SJeff Lance } 334f0933a60SJeff Lance ctrl |= CNTRLREG_TSCSSENB; 3350d3a7cceSAndrew F. Davis regmap_write(tscadc->regmap, REG_CTRL, ctrl); 33601636eb9SPatil, Rachna 3370d3a7cceSAndrew F. Davis regmap_write(tscadc->regmap, REG_CLKDIV, tscadc->clk_div); 338e90f8754SMatthias Kaehlcke 33901636eb9SPatil, Rachna return 0; 34001636eb9SPatil, Rachna } 34101636eb9SPatil, Rachna 342dae936a0SAndrew F. Davis static SIMPLE_DEV_PM_OPS(tscadc_pm_ops, tscadc_suspend, tscadc_resume); 34301636eb9SPatil, Rachna 344a6543a1cSPatil, Rachna static const struct of_device_id ti_tscadc_dt_ids[] = { 345a6543a1cSPatil, Rachna { .compatible = "ti,am3359-tscadc", }, 346a6543a1cSPatil, Rachna { } 347a6543a1cSPatil, Rachna }; 348a6543a1cSPatil, Rachna MODULE_DEVICE_TABLE(of, ti_tscadc_dt_ids); 349a6543a1cSPatil, Rachna 35001636eb9SPatil, Rachna static struct platform_driver ti_tscadc_driver = { 35101636eb9SPatil, Rachna .driver = { 352a6543a1cSPatil, Rachna .name = "ti_am3359-tscadc", 353dae936a0SAndrew F. Davis .pm = &tscadc_pm_ops, 354131221bcSSachin Kamat .of_match_table = ti_tscadc_dt_ids, 35501636eb9SPatil, Rachna }, 35601636eb9SPatil, Rachna .probe = ti_tscadc_probe, 357612b95cdSGreg Kroah-Hartman .remove = ti_tscadc_remove, 35801636eb9SPatil, Rachna 35901636eb9SPatil, Rachna }; 36001636eb9SPatil, Rachna 36101636eb9SPatil, Rachna module_platform_driver(ti_tscadc_driver); 36201636eb9SPatil, Rachna 36301636eb9SPatil, Rachna MODULE_DESCRIPTION("TI touchscreen / ADC MFD controller driver"); 36401636eb9SPatil, Rachna MODULE_AUTHOR("Rachna Patil <rachna@ti.com>"); 36501636eb9SPatil, Rachna MODULE_LICENSE("GPL"); 366