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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * axp288_adc.c - X-Powers AXP288 PMIC ADC Driver
4 *
5 * Copyright (C) 2014 Intel Corporation
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 */
9
10#include <linux/dmi.h>
11#include <linux/module.h>
12#include <linux/kernel.h>
13#include <linux/device.h>
14#include <linux/regmap.h>
15#include <linux/mfd/axp20x.h>
16#include <linux/platform_device.h>
17
18#include <linux/iio/iio.h>
19#include <linux/iio/machine.h>
20#include <linux/iio/driver.h>
21
22/*
23 * This mask enables all ADCs except for the battery temp-sensor (TS), that is
24 * left as-is to avoid breaking charging on devices without a temp-sensor.
25 */
26#define AXP288_ADC_EN_MASK 0xF0
27#define AXP288_ADC_TS_ENABLE 0x01
28
29#define AXP288_ADC_TS_BIAS_MASK GENMASK(5, 4)
30#define AXP288_ADC_TS_BIAS_20UA (0 << 4)
31#define AXP288_ADC_TS_BIAS_40UA (1 << 4)
32#define AXP288_ADC_TS_BIAS_60UA (2 << 4)
33#define AXP288_ADC_TS_BIAS_80UA (3 << 4)
34#define AXP288_ADC_TS_CURRENT_ON_OFF_MASK GENMASK(1, 0)
35#define AXP288_ADC_TS_CURRENT_OFF (0 << 0)
36#define AXP288_ADC_TS_CURRENT_ON_WHEN_CHARGING (1 << 0)
37#define AXP288_ADC_TS_CURRENT_ON_ONDEMAND (2 << 0)
38#define AXP288_ADC_TS_CURRENT_ON (3 << 0)
39
40enum axp288_adc_id {
41 AXP288_ADC_TS,
42 AXP288_ADC_PMIC,
43 AXP288_ADC_GP,
44 AXP288_ADC_BATT_CHRG_I,
45 AXP288_ADC_BATT_DISCHRG_I,
46 AXP288_ADC_BATT_V,
47 AXP288_ADC_NR_CHAN,
48};
49
50struct axp288_adc_info {
51 int irq;
52 struct regmap *regmap;
53 bool ts_enabled;
54};
55
56static const struct iio_chan_spec axp288_adc_channels[] = {
57 {
58 .indexed = 1,
59 .type = IIO_TEMP,
60 .channel = 0,
61 .address = AXP288_TS_ADC_H,
62 .datasheet_name = "TS_PIN",
63 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
64 }, {
65 .indexed = 1,
66 .type = IIO_TEMP,
67 .channel = 1,
68 .address = AXP288_PMIC_ADC_H,
69 .datasheet_name = "PMIC_TEMP",
70 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
71 }, {
72 .indexed = 1,
73 .type = IIO_TEMP,
74 .channel = 2,
75 .address = AXP288_GP_ADC_H,
76 .datasheet_name = "GPADC",
77 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
78 }, {
79 .indexed = 1,
80 .type = IIO_CURRENT,
81 .channel = 3,
82 .address = AXP20X_BATT_CHRG_I_H,
83 .datasheet_name = "BATT_CHG_I",
84 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
85 }, {
86 .indexed = 1,
87 .type = IIO_CURRENT,
88 .channel = 4,
89 .address = AXP20X_BATT_DISCHRG_I_H,
90 .datasheet_name = "BATT_DISCHRG_I",
91 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
92 }, {
93 .indexed = 1,
94 .type = IIO_VOLTAGE,
95 .channel = 5,
96 .address = AXP20X_BATT_V_H,
97 .datasheet_name = "BATT_V",
98 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
99 },
100};
101
102/* for consumer drivers */
103static struct iio_map axp288_adc_default_maps[] = {
104 IIO_MAP("TS_PIN", "axp288-batt", "axp288-batt-temp"),
105 IIO_MAP("PMIC_TEMP", "axp288-pmic", "axp288-pmic-temp"),
106 IIO_MAP("GPADC", "axp288-gpadc", "axp288-system-temp"),
107 IIO_MAP("BATT_CHG_I", "axp288-chrg", "axp288-chrg-curr"),
108 IIO_MAP("BATT_DISCHRG_I", "axp288-chrg", "axp288-chrg-d-curr"),
109 IIO_MAP("BATT_V", "axp288-batt", "axp288-batt-volt"),
110 {},
111};
112
113static int axp288_adc_read_channel(int *val, unsigned long address,
114 struct regmap *regmap)
115{
116 u8 buf[2];
117
118 if (regmap_bulk_read(regmap, address, buf, 2))
119 return -EIO;
120 *val = (buf[0] << 4) + ((buf[1] >> 4) & 0x0F);
121
122 return IIO_VAL_INT;
123}
124
125/*
126 * The current-source used for the battery temp-sensor (TS) is shared
127 * with the GPADC. For proper fuel-gauge and charger operation the TS
128 * current-source needs to be permanently on. But to read the GPADC we
129 * need to temporary switch the TS current-source to ondemand, so that
130 * the GPADC can use it, otherwise we will always read an all 0 value.
131 */
132static int axp288_adc_set_ts(struct axp288_adc_info *info,
133 unsigned int mode, unsigned long address)
134{
135 int ret;
136
137 /* No need to switch the current-source if the TS pin is disabled */
138 if (!info->ts_enabled)
139 return 0;
140
141 /* Channels other than GPADC do not need the current source */
142 if (address != AXP288_GP_ADC_H)
143 return 0;
144
145 ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
146 AXP288_ADC_TS_CURRENT_ON_OFF_MASK, mode);
147 if (ret)
148 return ret;
149
150 /* When switching to the GPADC pin give things some time to settle */
151 if (mode == AXP288_ADC_TS_CURRENT_ON_ONDEMAND)
152 usleep_range(6000, 10000);
153
154 return 0;
155}
156
157static int axp288_adc_read_raw(struct iio_dev *indio_dev,
158 struct iio_chan_spec const *chan,
159 int *val, int *val2, long mask)
160{
161 int ret;
162 struct axp288_adc_info *info = iio_priv(indio_dev);
163
164 mutex_lock(&indio_dev->mlock);
165 switch (mask) {
166 case IIO_CHAN_INFO_RAW:
167 if (axp288_adc_set_ts(info, AXP288_ADC_TS_CURRENT_ON_ONDEMAND,
168 chan->address)) {
169 dev_err(&indio_dev->dev, "GPADC mode\n");
170 ret = -EINVAL;
171 break;
172 }
173 ret = axp288_adc_read_channel(val, chan->address, info->regmap);
174 if (axp288_adc_set_ts(info, AXP288_ADC_TS_CURRENT_ON,
175 chan->address))
176 dev_err(&indio_dev->dev, "TS pin restore\n");
177 break;
178 default:
179 ret = -EINVAL;
180 }
181 mutex_unlock(&indio_dev->mlock);
182
183 return ret;
184}
185
186/*
187 * We rely on the machine's firmware to correctly setup the TS pin bias current
188 * at boot. This lists systems with broken fw where we need to set it ourselves.
189 */
190static const struct dmi_system_id axp288_adc_ts_bias_override[] = {
191 {
192 /* Lenovo Ideapad 100S (11 inch) */
193 .matches = {
194 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
195 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 100S-11IBY"),
196 },
197 .driver_data = (void *)(uintptr_t)AXP288_ADC_TS_BIAS_80UA,
198 },
199 {}
200};
201
202static int axp288_adc_initialize(struct axp288_adc_info *info)
203{
204 const struct dmi_system_id *bias_override;
205 int ret, adc_enable_val;
206
207 bias_override = dmi_first_match(axp288_adc_ts_bias_override);
208 if (bias_override) {
209 ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
210 AXP288_ADC_TS_BIAS_MASK,
211 (uintptr_t)bias_override->driver_data);
212 if (ret)
213 return ret;
214 }
215
216 /*
217 * Determine if the TS pin is enabled and set the TS current-source
218 * accordingly.
219 */
220 ret = regmap_read(info->regmap, AXP20X_ADC_EN1, &adc_enable_val);
221 if (ret)
222 return ret;
223
224 if (adc_enable_val & AXP288_ADC_TS_ENABLE) {
225 info->ts_enabled = true;
226 ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
227 AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
228 AXP288_ADC_TS_CURRENT_ON);
229 } else {
230 info->ts_enabled = false;
231 ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
232 AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
233 AXP288_ADC_TS_CURRENT_OFF);
234 }
235 if (ret)
236 return ret;
237
238 /* Turn on the ADC for all channels except TS, leave TS as is */
239 return regmap_update_bits(info->regmap, AXP20X_ADC_EN1,
240 AXP288_ADC_EN_MASK, AXP288_ADC_EN_MASK);
241}
242
243static const struct iio_info axp288_adc_iio_info = {
244 .read_raw = &axp288_adc_read_raw,
245};
246
247static int axp288_adc_probe(struct platform_device *pdev)
248{
249 int ret;
250 struct axp288_adc_info *info;
251 struct iio_dev *indio_dev;
252 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
253
254 indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*info));
255 if (!indio_dev)
256 return -ENOMEM;
257
258 info = iio_priv(indio_dev);
259 info->irq = platform_get_irq(pdev, 0);
260 if (info->irq < 0)
261 return info->irq;
262 platform_set_drvdata(pdev, indio_dev);
263 info->regmap = axp20x->regmap;
264 /*
265 * Set ADC to enabled state at all time, including system suspend.
266 * otherwise internal fuel gauge functionality may be affected.
267 */
268 ret = axp288_adc_initialize(info);
269 if (ret) {
270 dev_err(&pdev->dev, "unable to enable ADC device\n");
271 return ret;
272 }
273
274 indio_dev->dev.parent = &pdev->dev;
275 indio_dev->name = pdev->name;
276 indio_dev->channels = axp288_adc_channels;
277 indio_dev->num_channels = ARRAY_SIZE(axp288_adc_channels);
278 indio_dev->info = &axp288_adc_iio_info;
279 indio_dev->modes = INDIO_DIRECT_MODE;
280 ret = iio_map_array_register(indio_dev, axp288_adc_default_maps);
281 if (ret < 0)
282 return ret;
283
284 ret = iio_device_register(indio_dev);
285 if (ret < 0) {
286 dev_err(&pdev->dev, "unable to register iio device\n");
287 goto err_array_unregister;
288 }
289 return 0;
290
291err_array_unregister:
292 iio_map_array_unregister(indio_dev);
293
294 return ret;
295}
296
297static int axp288_adc_remove(struct platform_device *pdev)
298{
299 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
300
301 iio_device_unregister(indio_dev);
302 iio_map_array_unregister(indio_dev);
303
304 return 0;
305}
306
307static const struct platform_device_id axp288_adc_id_table[] = {
308 { .name = "axp288_adc" },
309 {},
310};
311
312static struct platform_driver axp288_adc_driver = {
313 .probe = axp288_adc_probe,
314 .remove = axp288_adc_remove,
315 .id_table = axp288_adc_id_table,
316 .driver = {
317 .name = "axp288_adc",
318 },
319};
320
321MODULE_DEVICE_TABLE(platform, axp288_adc_id_table);
322
323module_platform_driver(axp288_adc_driver);
324
325MODULE_AUTHOR("Jacob Pan <jacob.jun.pan@linux.intel.com>");
326MODULE_DESCRIPTION("X-Powers AXP288 ADC Driver");
327MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * axp288_adc.c - X-Powers AXP288 PMIC ADC Driver
4 *
5 * Copyright (C) 2014 Intel Corporation
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 */
9
10#include <linux/dmi.h>
11#include <linux/module.h>
12#include <linux/kernel.h>
13#include <linux/device.h>
14#include <linux/regmap.h>
15#include <linux/mfd/axp20x.h>
16#include <linux/platform_device.h>
17
18#include <linux/iio/iio.h>
19#include <linux/iio/machine.h>
20#include <linux/iio/driver.h>
21
22/*
23 * This mask enables all ADCs except for the battery temp-sensor (TS), that is
24 * left as-is to avoid breaking charging on devices without a temp-sensor.
25 */
26#define AXP288_ADC_EN_MASK 0xF0
27#define AXP288_ADC_TS_ENABLE 0x01
28
29#define AXP288_ADC_TS_BIAS_MASK GENMASK(5, 4)
30#define AXP288_ADC_TS_BIAS_20UA (0 << 4)
31#define AXP288_ADC_TS_BIAS_40UA (1 << 4)
32#define AXP288_ADC_TS_BIAS_60UA (2 << 4)
33#define AXP288_ADC_TS_BIAS_80UA (3 << 4)
34#define AXP288_ADC_TS_CURRENT_ON_OFF_MASK GENMASK(1, 0)
35#define AXP288_ADC_TS_CURRENT_OFF (0 << 0)
36#define AXP288_ADC_TS_CURRENT_ON_WHEN_CHARGING (1 << 0)
37#define AXP288_ADC_TS_CURRENT_ON_ONDEMAND (2 << 0)
38#define AXP288_ADC_TS_CURRENT_ON (3 << 0)
39
40enum axp288_adc_id {
41 AXP288_ADC_TS,
42 AXP288_ADC_PMIC,
43 AXP288_ADC_GP,
44 AXP288_ADC_BATT_CHRG_I,
45 AXP288_ADC_BATT_DISCHRG_I,
46 AXP288_ADC_BATT_V,
47 AXP288_ADC_NR_CHAN,
48};
49
50struct axp288_adc_info {
51 int irq;
52 struct regmap *regmap;
53 bool ts_enabled;
54};
55
56static const struct iio_chan_spec axp288_adc_channels[] = {
57 {
58 .indexed = 1,
59 .type = IIO_TEMP,
60 .channel = 0,
61 .address = AXP288_TS_ADC_H,
62 .datasheet_name = "TS_PIN",
63 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
64 }, {
65 .indexed = 1,
66 .type = IIO_TEMP,
67 .channel = 1,
68 .address = AXP288_PMIC_ADC_H,
69 .datasheet_name = "PMIC_TEMP",
70 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
71 }, {
72 .indexed = 1,
73 .type = IIO_TEMP,
74 .channel = 2,
75 .address = AXP288_GP_ADC_H,
76 .datasheet_name = "GPADC",
77 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
78 }, {
79 .indexed = 1,
80 .type = IIO_CURRENT,
81 .channel = 3,
82 .address = AXP20X_BATT_CHRG_I_H,
83 .datasheet_name = "BATT_CHG_I",
84 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
85 }, {
86 .indexed = 1,
87 .type = IIO_CURRENT,
88 .channel = 4,
89 .address = AXP20X_BATT_DISCHRG_I_H,
90 .datasheet_name = "BATT_DISCHRG_I",
91 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
92 }, {
93 .indexed = 1,
94 .type = IIO_VOLTAGE,
95 .channel = 5,
96 .address = AXP20X_BATT_V_H,
97 .datasheet_name = "BATT_V",
98 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
99 },
100};
101
102/* for consumer drivers */
103static struct iio_map axp288_adc_default_maps[] = {
104 IIO_MAP("TS_PIN", "axp288-batt", "axp288-batt-temp"),
105 IIO_MAP("PMIC_TEMP", "axp288-pmic", "axp288-pmic-temp"),
106 IIO_MAP("GPADC", "axp288-gpadc", "axp288-system-temp"),
107 IIO_MAP("BATT_CHG_I", "axp288-chrg", "axp288-chrg-curr"),
108 IIO_MAP("BATT_DISCHRG_I", "axp288-chrg", "axp288-chrg-d-curr"),
109 IIO_MAP("BATT_V", "axp288-batt", "axp288-batt-volt"),
110 {},
111};
112
113static int axp288_adc_read_channel(int *val, unsigned long address,
114 struct regmap *regmap)
115{
116 u8 buf[2];
117
118 if (regmap_bulk_read(regmap, address, buf, 2))
119 return -EIO;
120 *val = (buf[0] << 4) + ((buf[1] >> 4) & 0x0F);
121
122 return IIO_VAL_INT;
123}
124
125/*
126 * The current-source used for the battery temp-sensor (TS) is shared
127 * with the GPADC. For proper fuel-gauge and charger operation the TS
128 * current-source needs to be permanently on. But to read the GPADC we
129 * need to temporary switch the TS current-source to ondemand, so that
130 * the GPADC can use it, otherwise we will always read an all 0 value.
131 */
132static int axp288_adc_set_ts(struct axp288_adc_info *info,
133 unsigned int mode, unsigned long address)
134{
135 int ret;
136
137 /* No need to switch the current-source if the TS pin is disabled */
138 if (!info->ts_enabled)
139 return 0;
140
141 /* Channels other than GPADC do not need the current source */
142 if (address != AXP288_GP_ADC_H)
143 return 0;
144
145 ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
146 AXP288_ADC_TS_CURRENT_ON_OFF_MASK, mode);
147 if (ret)
148 return ret;
149
150 /* When switching to the GPADC pin give things some time to settle */
151 if (mode == AXP288_ADC_TS_CURRENT_ON_ONDEMAND)
152 usleep_range(6000, 10000);
153
154 return 0;
155}
156
157static int axp288_adc_read_raw(struct iio_dev *indio_dev,
158 struct iio_chan_spec const *chan,
159 int *val, int *val2, long mask)
160{
161 int ret;
162 struct axp288_adc_info *info = iio_priv(indio_dev);
163
164 mutex_lock(&indio_dev->mlock);
165 switch (mask) {
166 case IIO_CHAN_INFO_RAW:
167 if (axp288_adc_set_ts(info, AXP288_ADC_TS_CURRENT_ON_ONDEMAND,
168 chan->address)) {
169 dev_err(&indio_dev->dev, "GPADC mode\n");
170 ret = -EINVAL;
171 break;
172 }
173 ret = axp288_adc_read_channel(val, chan->address, info->regmap);
174 if (axp288_adc_set_ts(info, AXP288_ADC_TS_CURRENT_ON,
175 chan->address))
176 dev_err(&indio_dev->dev, "TS pin restore\n");
177 break;
178 default:
179 ret = -EINVAL;
180 }
181 mutex_unlock(&indio_dev->mlock);
182
183 return ret;
184}
185
186/*
187 * We rely on the machine's firmware to correctly setup the TS pin bias current
188 * at boot. This lists systems with broken fw where we need to set it ourselves.
189 */
190static const struct dmi_system_id axp288_adc_ts_bias_override[] = {
191 {
192 /* Lenovo Ideapad 100S (11 inch) */
193 .matches = {
194 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
195 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 100S-11IBY"),
196 },
197 .driver_data = (void *)(uintptr_t)AXP288_ADC_TS_BIAS_80UA,
198 },
199 {}
200};
201
202static int axp288_adc_initialize(struct axp288_adc_info *info)
203{
204 const struct dmi_system_id *bias_override;
205 int ret, adc_enable_val;
206
207 bias_override = dmi_first_match(axp288_adc_ts_bias_override);
208 if (bias_override) {
209 ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
210 AXP288_ADC_TS_BIAS_MASK,
211 (uintptr_t)bias_override->driver_data);
212 if (ret)
213 return ret;
214 }
215
216 /*
217 * Determine if the TS pin is enabled and set the TS current-source
218 * accordingly.
219 */
220 ret = regmap_read(info->regmap, AXP20X_ADC_EN1, &adc_enable_val);
221 if (ret)
222 return ret;
223
224 if (adc_enable_val & AXP288_ADC_TS_ENABLE) {
225 info->ts_enabled = true;
226 ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
227 AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
228 AXP288_ADC_TS_CURRENT_ON);
229 } else {
230 info->ts_enabled = false;
231 ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
232 AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
233 AXP288_ADC_TS_CURRENT_OFF);
234 }
235 if (ret)
236 return ret;
237
238 /* Turn on the ADC for all channels except TS, leave TS as is */
239 return regmap_update_bits(info->regmap, AXP20X_ADC_EN1,
240 AXP288_ADC_EN_MASK, AXP288_ADC_EN_MASK);
241}
242
243static const struct iio_info axp288_adc_iio_info = {
244 .read_raw = &axp288_adc_read_raw,
245};
246
247static int axp288_adc_probe(struct platform_device *pdev)
248{
249 int ret;
250 struct axp288_adc_info *info;
251 struct iio_dev *indio_dev;
252 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
253
254 indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*info));
255 if (!indio_dev)
256 return -ENOMEM;
257
258 info = iio_priv(indio_dev);
259 info->irq = platform_get_irq(pdev, 0);
260 if (info->irq < 0)
261 return info->irq;
262 platform_set_drvdata(pdev, indio_dev);
263 info->regmap = axp20x->regmap;
264 /*
265 * Set ADC to enabled state at all time, including system suspend.
266 * otherwise internal fuel gauge functionality may be affected.
267 */
268 ret = axp288_adc_initialize(info);
269 if (ret) {
270 dev_err(&pdev->dev, "unable to enable ADC device\n");
271 return ret;
272 }
273
274 indio_dev->name = pdev->name;
275 indio_dev->channels = axp288_adc_channels;
276 indio_dev->num_channels = ARRAY_SIZE(axp288_adc_channels);
277 indio_dev->info = &axp288_adc_iio_info;
278 indio_dev->modes = INDIO_DIRECT_MODE;
279 ret = iio_map_array_register(indio_dev, axp288_adc_default_maps);
280 if (ret < 0)
281 return ret;
282
283 ret = iio_device_register(indio_dev);
284 if (ret < 0) {
285 dev_err(&pdev->dev, "unable to register iio device\n");
286 goto err_array_unregister;
287 }
288 return 0;
289
290err_array_unregister:
291 iio_map_array_unregister(indio_dev);
292
293 return ret;
294}
295
296static int axp288_adc_remove(struct platform_device *pdev)
297{
298 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
299
300 iio_device_unregister(indio_dev);
301 iio_map_array_unregister(indio_dev);
302
303 return 0;
304}
305
306static const struct platform_device_id axp288_adc_id_table[] = {
307 { .name = "axp288_adc" },
308 {},
309};
310
311static struct platform_driver axp288_adc_driver = {
312 .probe = axp288_adc_probe,
313 .remove = axp288_adc_remove,
314 .id_table = axp288_adc_id_table,
315 .driver = {
316 .name = "axp288_adc",
317 },
318};
319
320MODULE_DEVICE_TABLE(platform, axp288_adc_id_table);
321
322module_platform_driver(axp288_adc_driver);
323
324MODULE_AUTHOR("Jacob Pan <jacob.jun.pan@linux.intel.com>");
325MODULE_DESCRIPTION("X-Powers AXP288 ADC Driver");
326MODULE_LICENSE("GPL");