1c942fddfSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
2a06347c0SRobert Dolca /* -------------------------------------------------------------------------
3a06347c0SRobert Dolca * Copyright (C) 2014-2016, Intel Corporation
4a06347c0SRobert Dolca *
5a06347c0SRobert Dolca * -------------------------------------------------------------------------
6a06347c0SRobert Dolca */
7a06347c0SRobert Dolca
8a06347c0SRobert Dolca #include <linux/module.h>
9a06347c0SRobert Dolca #include <linux/acpi.h>
10a06347c0SRobert Dolca #include <linux/i2c.h>
11a06347c0SRobert Dolca #include <linux/interrupt.h>
12a06347c0SRobert Dolca #include <linux/nfc.h>
13a06347c0SRobert Dolca #include <linux/delay.h>
14a06347c0SRobert Dolca #include <linux/gpio/consumer.h>
15a06347c0SRobert Dolca #include <net/nfc/nfc.h>
16a06347c0SRobert Dolca #include <net/nfc/nci_core.h>
17a06347c0SRobert Dolca
18a06347c0SRobert Dolca #include "fdp.h"
19a06347c0SRobert Dolca
20a06347c0SRobert Dolca #define FDP_I2C_DRIVER_NAME "fdp_nci_i2c"
21a06347c0SRobert Dolca
22a06347c0SRobert Dolca #define FDP_DP_CLOCK_TYPE_NAME "clock-type"
23a06347c0SRobert Dolca #define FDP_DP_CLOCK_FREQ_NAME "clock-freq"
24a06347c0SRobert Dolca #define FDP_DP_FW_VSC_CFG_NAME "fw-vsc-cfg"
25a06347c0SRobert Dolca
26a06347c0SRobert Dolca #define FDP_FRAME_HEADROOM 2
27a06347c0SRobert Dolca #define FDP_FRAME_TAILROOM 1
28a06347c0SRobert Dolca
29a06347c0SRobert Dolca #define FDP_NCI_I2C_MIN_PAYLOAD 5
30a06347c0SRobert Dolca #define FDP_NCI_I2C_MAX_PAYLOAD 261
31a06347c0SRobert Dolca
32a06347c0SRobert Dolca #define FDP_POWER_OFF 0
33a06347c0SRobert Dolca #define FDP_POWER_ON 1
34a06347c0SRobert Dolca
35a06347c0SRobert Dolca #define fdp_nci_i2c_dump_skb(dev, prefix, skb) \
36a06347c0SRobert Dolca print_hex_dump(KERN_DEBUG, prefix": ", DUMP_PREFIX_OFFSET, \
37a06347c0SRobert Dolca 16, 1, (skb)->data, (skb)->len, 0)
38a06347c0SRobert Dolca
fdp_nci_i2c_reset(const struct fdp_i2c_phy * phy)393d463dd5SKrzysztof Kozlowski static void fdp_nci_i2c_reset(const struct fdp_i2c_phy *phy)
40a06347c0SRobert Dolca {
41a06347c0SRobert Dolca /* Reset RST/WakeUP for at least 100 micro-second */
42a06347c0SRobert Dolca gpiod_set_value_cansleep(phy->power_gpio, FDP_POWER_OFF);
43a06347c0SRobert Dolca usleep_range(1000, 4000);
44a06347c0SRobert Dolca gpiod_set_value_cansleep(phy->power_gpio, FDP_POWER_ON);
45a06347c0SRobert Dolca usleep_range(10000, 14000);
46a06347c0SRobert Dolca }
47a06347c0SRobert Dolca
fdp_nci_i2c_enable(void * phy_id)48a06347c0SRobert Dolca static int fdp_nci_i2c_enable(void *phy_id)
49a06347c0SRobert Dolca {
503d463dd5SKrzysztof Kozlowski const struct fdp_i2c_phy *phy = phy_id;
51a06347c0SRobert Dolca
52a06347c0SRobert Dolca fdp_nci_i2c_reset(phy);
53a06347c0SRobert Dolca
54a06347c0SRobert Dolca return 0;
55a06347c0SRobert Dolca }
56a06347c0SRobert Dolca
fdp_nci_i2c_disable(void * phy_id)57a06347c0SRobert Dolca static void fdp_nci_i2c_disable(void *phy_id)
58a06347c0SRobert Dolca {
593d463dd5SKrzysztof Kozlowski const struct fdp_i2c_phy *phy = phy_id;
60a06347c0SRobert Dolca
61a06347c0SRobert Dolca fdp_nci_i2c_reset(phy);
62a06347c0SRobert Dolca }
63a06347c0SRobert Dolca
fdp_nci_i2c_add_len_lrc(struct sk_buff * skb)64a06347c0SRobert Dolca static void fdp_nci_i2c_add_len_lrc(struct sk_buff *skb)
65a06347c0SRobert Dolca {
66a06347c0SRobert Dolca u8 lrc = 0;
67a06347c0SRobert Dolca u16 len, i;
68a06347c0SRobert Dolca
69a06347c0SRobert Dolca /* Add length header */
70a06347c0SRobert Dolca len = skb->len;
71d58ff351SJohannes Berg *(u8 *)skb_push(skb, 1) = len & 0xff;
72d58ff351SJohannes Berg *(u8 *)skb_push(skb, 1) = len >> 8;
73a06347c0SRobert Dolca
74a06347c0SRobert Dolca /* Compute and add lrc */
75a06347c0SRobert Dolca for (i = 0; i < len + 2; i++)
76a06347c0SRobert Dolca lrc ^= skb->data[i];
77a06347c0SRobert Dolca
78634fef61SJohannes Berg skb_put_u8(skb, lrc);
79a06347c0SRobert Dolca }
80a06347c0SRobert Dolca
fdp_nci_i2c_remove_len_lrc(struct sk_buff * skb)81a06347c0SRobert Dolca static void fdp_nci_i2c_remove_len_lrc(struct sk_buff *skb)
82a06347c0SRobert Dolca {
83a06347c0SRobert Dolca skb_pull(skb, FDP_FRAME_HEADROOM);
84a06347c0SRobert Dolca skb_trim(skb, skb->len - FDP_FRAME_TAILROOM);
85a06347c0SRobert Dolca }
86a06347c0SRobert Dolca
fdp_nci_i2c_write(void * phy_id,struct sk_buff * skb)87a06347c0SRobert Dolca static int fdp_nci_i2c_write(void *phy_id, struct sk_buff *skb)
88a06347c0SRobert Dolca {
89a06347c0SRobert Dolca struct fdp_i2c_phy *phy = phy_id;
90a06347c0SRobert Dolca struct i2c_client *client = phy->i2c_dev;
91a06347c0SRobert Dolca int r;
92a06347c0SRobert Dolca
93a06347c0SRobert Dolca if (phy->hard_fault != 0)
94a06347c0SRobert Dolca return phy->hard_fault;
95a06347c0SRobert Dolca
96a06347c0SRobert Dolca fdp_nci_i2c_add_len_lrc(skb);
97a06347c0SRobert Dolca fdp_nci_i2c_dump_skb(&client->dev, "fdp_wr", skb);
98a06347c0SRobert Dolca
99a06347c0SRobert Dolca r = i2c_master_send(client, skb->data, skb->len);
100a06347c0SRobert Dolca if (r == -EREMOTEIO) { /* Retry, chip was in standby */
101a06347c0SRobert Dolca usleep_range(1000, 4000);
102a06347c0SRobert Dolca r = i2c_master_send(client, skb->data, skb->len);
103a06347c0SRobert Dolca }
104a06347c0SRobert Dolca
105a06347c0SRobert Dolca if (r < 0 || r != skb->len)
106a06347c0SRobert Dolca dev_dbg(&client->dev, "%s: error err=%d len=%d\n",
107a06347c0SRobert Dolca __func__, r, skb->len);
108a06347c0SRobert Dolca
109a06347c0SRobert Dolca if (r >= 0) {
110a06347c0SRobert Dolca if (r != skb->len) {
111a06347c0SRobert Dolca phy->hard_fault = r;
112a06347c0SRobert Dolca r = -EREMOTEIO;
113a06347c0SRobert Dolca } else {
114a06347c0SRobert Dolca r = 0;
115a06347c0SRobert Dolca }
116a06347c0SRobert Dolca }
117a06347c0SRobert Dolca
118a06347c0SRobert Dolca fdp_nci_i2c_remove_len_lrc(skb);
119a06347c0SRobert Dolca
120a06347c0SRobert Dolca return r;
121a06347c0SRobert Dolca }
122a06347c0SRobert Dolca
1237a5e98daSKrzysztof Kozlowski static const struct nfc_phy_ops i2c_phy_ops = {
124a06347c0SRobert Dolca .write = fdp_nci_i2c_write,
125a06347c0SRobert Dolca .enable = fdp_nci_i2c_enable,
126a06347c0SRobert Dolca .disable = fdp_nci_i2c_disable,
127a06347c0SRobert Dolca };
128a06347c0SRobert Dolca
fdp_nci_i2c_read(struct fdp_i2c_phy * phy,struct sk_buff ** skb)129a06347c0SRobert Dolca static int fdp_nci_i2c_read(struct fdp_i2c_phy *phy, struct sk_buff **skb)
130a06347c0SRobert Dolca {
131a06347c0SRobert Dolca int r, len;
132a06347c0SRobert Dolca u8 tmp[FDP_NCI_I2C_MAX_PAYLOAD], lrc, k;
133a06347c0SRobert Dolca u16 i;
134a06347c0SRobert Dolca struct i2c_client *client = phy->i2c_dev;
135a06347c0SRobert Dolca
136a06347c0SRobert Dolca *skb = NULL;
137a06347c0SRobert Dolca
138a06347c0SRobert Dolca /* Read the length packet and the data packet */
139a06347c0SRobert Dolca for (k = 0; k < 2; k++) {
140a06347c0SRobert Dolca
141a06347c0SRobert Dolca len = phy->next_read_size;
142a06347c0SRobert Dolca
143a06347c0SRobert Dolca r = i2c_master_recv(client, tmp, len);
144a06347c0SRobert Dolca if (r != len) {
145a06347c0SRobert Dolca dev_dbg(&client->dev, "%s: i2c recv err: %d\n",
146a06347c0SRobert Dolca __func__, r);
147a06347c0SRobert Dolca goto flush;
148a06347c0SRobert Dolca }
149a06347c0SRobert Dolca
150a06347c0SRobert Dolca /* Check packet integruty */
151a06347c0SRobert Dolca for (lrc = i = 0; i < r; i++)
152a06347c0SRobert Dolca lrc ^= tmp[i];
153a06347c0SRobert Dolca
154a06347c0SRobert Dolca /*
155a06347c0SRobert Dolca * LRC check failed. This may due to transmission error or
156afe197f4Swengjianfeng * desynchronization between driver and FDP. Drop the packet
157a06347c0SRobert Dolca * and force resynchronization
158a06347c0SRobert Dolca */
159a06347c0SRobert Dolca if (lrc) {
160a06347c0SRobert Dolca dev_dbg(&client->dev, "%s: corrupted packet\n",
161a06347c0SRobert Dolca __func__);
162a06347c0SRobert Dolca phy->next_read_size = 5;
163a06347c0SRobert Dolca goto flush;
164a06347c0SRobert Dolca }
165a06347c0SRobert Dolca
166a06347c0SRobert Dolca /* Packet that contains a length */
167a06347c0SRobert Dolca if (tmp[0] == 0 && tmp[1] == 0) {
168a06347c0SRobert Dolca phy->next_read_size = (tmp[2] << 8) + tmp[3] + 3;
169a06347c0SRobert Dolca } else {
170a06347c0SRobert Dolca phy->next_read_size = FDP_NCI_I2C_MIN_PAYLOAD;
171a06347c0SRobert Dolca
172a06347c0SRobert Dolca *skb = alloc_skb(len, GFP_KERNEL);
173a06347c0SRobert Dolca if (*skb == NULL) {
174a06347c0SRobert Dolca r = -ENOMEM;
175a06347c0SRobert Dolca goto flush;
176a06347c0SRobert Dolca }
177a06347c0SRobert Dolca
17859ae1d12SJohannes Berg skb_put_data(*skb, tmp, len);
179a06347c0SRobert Dolca fdp_nci_i2c_dump_skb(&client->dev, "fdp_rd", *skb);
180a06347c0SRobert Dolca
181a06347c0SRobert Dolca fdp_nci_i2c_remove_len_lrc(*skb);
182a06347c0SRobert Dolca }
183a06347c0SRobert Dolca }
184a06347c0SRobert Dolca
185a06347c0SRobert Dolca return 0;
186a06347c0SRobert Dolca
187a06347c0SRobert Dolca flush:
188a06347c0SRobert Dolca /* Flush the remaining data */
189a06347c0SRobert Dolca if (i2c_master_recv(client, tmp, sizeof(tmp)) < 0)
190a06347c0SRobert Dolca r = -EREMOTEIO;
191a06347c0SRobert Dolca
192a06347c0SRobert Dolca return r;
193a06347c0SRobert Dolca }
194a06347c0SRobert Dolca
fdp_nci_i2c_irq_thread_fn(int irq,void * phy_id)195a06347c0SRobert Dolca static irqreturn_t fdp_nci_i2c_irq_thread_fn(int irq, void *phy_id)
196a06347c0SRobert Dolca {
197a06347c0SRobert Dolca struct fdp_i2c_phy *phy = phy_id;
198a06347c0SRobert Dolca struct sk_buff *skb;
199a06347c0SRobert Dolca int r;
200a06347c0SRobert Dolca
201a06347c0SRobert Dolca if (!phy || irq != phy->i2c_dev->irq) {
202a06347c0SRobert Dolca WARN_ON_ONCE(1);
203a06347c0SRobert Dolca return IRQ_NONE;
204a06347c0SRobert Dolca }
205a06347c0SRobert Dolca
206a06347c0SRobert Dolca r = fdp_nci_i2c_read(phy, &skb);
207a06347c0SRobert Dolca
208af22d055Swengjianfeng if (r == -EREMOTEIO || r == -ENOMEM || r == -EBADMSG)
209a06347c0SRobert Dolca return IRQ_HANDLED;
210a06347c0SRobert Dolca
211a06347c0SRobert Dolca if (skb != NULL)
2129571289dSKrzysztof Kozlowski nci_recv_frame(phy->ndev, skb);
213a06347c0SRobert Dolca
214a06347c0SRobert Dolca return IRQ_HANDLED;
215a06347c0SRobert Dolca }
216a06347c0SRobert Dolca
fdp_nci_i2c_read_device_properties(struct device * dev,u8 * clock_type,u32 * clock_freq,u8 ** fw_vsc_cfg)217a06347c0SRobert Dolca static void fdp_nci_i2c_read_device_properties(struct device *dev,
218a06347c0SRobert Dolca u8 *clock_type, u32 *clock_freq,
219a06347c0SRobert Dolca u8 **fw_vsc_cfg)
220a06347c0SRobert Dolca {
221a06347c0SRobert Dolca int r;
222a06347c0SRobert Dolca u8 len;
223a06347c0SRobert Dolca
224a06347c0SRobert Dolca r = device_property_read_u8(dev, FDP_DP_CLOCK_TYPE_NAME, clock_type);
225a06347c0SRobert Dolca if (r) {
226a06347c0SRobert Dolca dev_dbg(dev, "Using default clock type");
227a06347c0SRobert Dolca *clock_type = 0;
228a06347c0SRobert Dolca }
229a06347c0SRobert Dolca
230a06347c0SRobert Dolca r = device_property_read_u32(dev, FDP_DP_CLOCK_FREQ_NAME, clock_freq);
231a06347c0SRobert Dolca if (r) {
232a06347c0SRobert Dolca dev_dbg(dev, "Using default clock frequency\n");
233a06347c0SRobert Dolca *clock_freq = 26000;
234a06347c0SRobert Dolca }
235a06347c0SRobert Dolca
236a06347c0SRobert Dolca if (device_property_present(dev, FDP_DP_FW_VSC_CFG_NAME)) {
237a06347c0SRobert Dolca r = device_property_read_u8(dev, FDP_DP_FW_VSC_CFG_NAME,
238a06347c0SRobert Dolca &len);
239a06347c0SRobert Dolca
240a06347c0SRobert Dolca if (r || len <= 0)
241a06347c0SRobert Dolca goto vsc_read_err;
242a06347c0SRobert Dolca
243a06347c0SRobert Dolca /* Add 1 to the length to inclue the length byte itself */
244a06347c0SRobert Dolca len++;
245a06347c0SRobert Dolca
2463c4211baSKees Cook *fw_vsc_cfg = devm_kmalloc_array(dev,
2473c4211baSKees Cook len, sizeof(**fw_vsc_cfg),
248a06347c0SRobert Dolca GFP_KERNEL);
249a06347c0SRobert Dolca
25011f180a5SKang Chen if (!*fw_vsc_cfg)
25111f180a5SKang Chen goto alloc_err;
25211f180a5SKang Chen
253a06347c0SRobert Dolca r = device_property_read_u8_array(dev, FDP_DP_FW_VSC_CFG_NAME,
254a06347c0SRobert Dolca *fw_vsc_cfg, len);
255a06347c0SRobert Dolca
256a06347c0SRobert Dolca if (r) {
257517ce4e9SPan Bian devm_kfree(dev, *fw_vsc_cfg);
258a06347c0SRobert Dolca goto vsc_read_err;
259a06347c0SRobert Dolca }
260a06347c0SRobert Dolca } else {
261a06347c0SRobert Dolca vsc_read_err:
262a06347c0SRobert Dolca dev_dbg(dev, "FW vendor specific commands not present\n");
263a06347c0SRobert Dolca *fw_vsc_cfg = NULL;
264a06347c0SRobert Dolca }
265a06347c0SRobert Dolca
26611f180a5SKang Chen alloc_err:
267a06347c0SRobert Dolca dev_dbg(dev, "Clock type: %d, clock frequency: %d, VSC: %s",
268a06347c0SRobert Dolca *clock_type, *clock_freq, *fw_vsc_cfg != NULL ? "yes" : "no");
269a06347c0SRobert Dolca }
270a06347c0SRobert Dolca
271a5d41094SAndy Shevchenko static const struct acpi_gpio_params power_gpios = { 0, 0, false };
272a5d41094SAndy Shevchenko
273a5d41094SAndy Shevchenko static const struct acpi_gpio_mapping acpi_fdp_gpios[] = {
274a5d41094SAndy Shevchenko { "power-gpios", &power_gpios, 1 },
275a5d41094SAndy Shevchenko {},
276a5d41094SAndy Shevchenko };
277a5d41094SAndy Shevchenko
fdp_nci_i2c_probe(struct i2c_client * client)2788597c092SAndy Shevchenko static int fdp_nci_i2c_probe(struct i2c_client *client)
279a06347c0SRobert Dolca {
280a06347c0SRobert Dolca struct fdp_i2c_phy *phy;
281a06347c0SRobert Dolca struct device *dev = &client->dev;
282a06347c0SRobert Dolca u8 *fw_vsc_cfg;
283a06347c0SRobert Dolca u8 clock_type;
284a06347c0SRobert Dolca u32 clock_freq;
285a06347c0SRobert Dolca int r = 0;
286a06347c0SRobert Dolca
287a06347c0SRobert Dolca if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
288a06347c0SRobert Dolca nfc_err(dev, "No I2C_FUNC_I2C support\n");
289a06347c0SRobert Dolca return -ENODEV;
290a06347c0SRobert Dolca }
291a06347c0SRobert Dolca
2920b0a264dSChristophe Ricard /* Checking if we have an irq */
2930b0a264dSChristophe Ricard if (client->irq <= 0) {
2940b0a264dSChristophe Ricard nfc_err(dev, "IRQ not present\n");
2950b0a264dSChristophe Ricard return -ENODEV;
2960b0a264dSChristophe Ricard }
2970b0a264dSChristophe Ricard
2987b9fcda9SAndy Shevchenko phy = devm_kzalloc(dev, sizeof(struct fdp_i2c_phy), GFP_KERNEL);
299a06347c0SRobert Dolca if (!phy)
300a06347c0SRobert Dolca return -ENOMEM;
301a06347c0SRobert Dolca
302a06347c0SRobert Dolca phy->i2c_dev = client;
303a06347c0SRobert Dolca phy->next_read_size = FDP_NCI_I2C_MIN_PAYLOAD;
304a06347c0SRobert Dolca i2c_set_clientdata(client, phy);
305a06347c0SRobert Dolca
3067b9fcda9SAndy Shevchenko r = devm_request_threaded_irq(dev, client->irq,
3077b9fcda9SAndy Shevchenko NULL, fdp_nci_i2c_irq_thread_fn,
308a06347c0SRobert Dolca IRQF_TRIGGER_RISING | IRQF_ONESHOT,
309a06347c0SRobert Dolca FDP_I2C_DRIVER_NAME, phy);
310a06347c0SRobert Dolca
311a06347c0SRobert Dolca if (r < 0) {
312a06347c0SRobert Dolca nfc_err(&client->dev, "Unable to register IRQ handler\n");
313a06347c0SRobert Dolca return r;
314a06347c0SRobert Dolca }
315a06347c0SRobert Dolca
316a5d41094SAndy Shevchenko r = devm_acpi_dev_add_driver_gpios(dev, acpi_fdp_gpios);
317a5d41094SAndy Shevchenko if (r)
318a5d41094SAndy Shevchenko dev_dbg(dev, "Unable to add GPIO mapping table\n");
319a06347c0SRobert Dolca
320a5d41094SAndy Shevchenko /* Requesting the power gpio */
321a5d41094SAndy Shevchenko phy->power_gpio = devm_gpiod_get(dev, "power", GPIOD_OUT_LOW);
322a06347c0SRobert Dolca if (IS_ERR(phy->power_gpio)) {
323a06347c0SRobert Dolca nfc_err(dev, "Power GPIO request failed\n");
324a06347c0SRobert Dolca return PTR_ERR(phy->power_gpio);
325a06347c0SRobert Dolca }
326a06347c0SRobert Dolca
327a06347c0SRobert Dolca /* read device properties to get the clock and production settings */
328a06347c0SRobert Dolca fdp_nci_i2c_read_device_properties(dev, &clock_type, &clock_freq,
329a06347c0SRobert Dolca &fw_vsc_cfg);
330a06347c0SRobert Dolca
331a06347c0SRobert Dolca /* Call the NFC specific probe function */
332a06347c0SRobert Dolca r = fdp_nci_probe(phy, &i2c_phy_ops, &phy->ndev,
333a06347c0SRobert Dolca FDP_FRAME_HEADROOM, FDP_FRAME_TAILROOM,
334a06347c0SRobert Dolca clock_type, clock_freq, fw_vsc_cfg);
335a06347c0SRobert Dolca if (r < 0) {
336a06347c0SRobert Dolca nfc_err(dev, "NCI probing error\n");
337a06347c0SRobert Dolca return r;
338a06347c0SRobert Dolca }
339a06347c0SRobert Dolca
340a06347c0SRobert Dolca return 0;
341a06347c0SRobert Dolca }
342a06347c0SRobert Dolca
fdp_nci_i2c_remove(struct i2c_client * client)343ed5c2f5fSUwe Kleine-König static void fdp_nci_i2c_remove(struct i2c_client *client)
344a06347c0SRobert Dolca {
345a06347c0SRobert Dolca struct fdp_i2c_phy *phy = i2c_get_clientdata(client);
346a06347c0SRobert Dolca
347a06347c0SRobert Dolca fdp_nci_remove(phy->ndev);
348a06347c0SRobert Dolca fdp_nci_i2c_disable(phy);
349a06347c0SRobert Dolca }
350a06347c0SRobert Dolca
351a06347c0SRobert Dolca static const struct acpi_device_id fdp_nci_i2c_acpi_match[] = {
352a06347c0SRobert Dolca {"INT339A", 0},
353a06347c0SRobert Dolca {}
354a06347c0SRobert Dolca };
355a06347c0SRobert Dolca MODULE_DEVICE_TABLE(acpi, fdp_nci_i2c_acpi_match);
356a06347c0SRobert Dolca
357a06347c0SRobert Dolca static struct i2c_driver fdp_nci_i2c_driver = {
358a06347c0SRobert Dolca .driver = {
359a06347c0SRobert Dolca .name = FDP_I2C_DRIVER_NAME,
360466e1c88SKrzysztof Kozlowski .acpi_match_table = fdp_nci_i2c_acpi_match,
361a06347c0SRobert Dolca },
362*efc3001fSUwe Kleine-König .probe = fdp_nci_i2c_probe,
363a06347c0SRobert Dolca .remove = fdp_nci_i2c_remove,
364a06347c0SRobert Dolca };
365a06347c0SRobert Dolca module_i2c_driver(fdp_nci_i2c_driver);
366a06347c0SRobert Dolca
367a06347c0SRobert Dolca MODULE_LICENSE("GPL");
368a06347c0SRobert Dolca MODULE_DESCRIPTION("I2C driver for Intel Fields Peak NFC controller");
369a06347c0SRobert Dolca MODULE_AUTHOR("Robert Dolca <robert.dolca@intel.com>");
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