1f5d69f62SLinus Walleij // SPDX-License-Identifier: GPL-2.0-only
2f5d69f62SLinus Walleij /*
3f5d69f62SLinus Walleij * drivers/leds/leds-as3645a.c - AS3645A and LM3555 flash controllers driver
4f5d69f62SLinus Walleij *
5f5d69f62SLinus Walleij * Copyright (C) 2008-2011 Nokia Corporation
6f5d69f62SLinus Walleij * Copyright (c) 2011, 2017 Intel Corporation.
7f5d69f62SLinus Walleij *
8f5d69f62SLinus Walleij * Based on drivers/media/i2c/as3645a.c.
9f5d69f62SLinus Walleij *
10f5d69f62SLinus Walleij * Contact: Sakari Ailus <sakari.ailus@iki.fi>
11f5d69f62SLinus Walleij */
12f5d69f62SLinus Walleij
13f5d69f62SLinus Walleij #include <linux/delay.h>
14f5d69f62SLinus Walleij #include <linux/gpio/consumer.h>
15f5d69f62SLinus Walleij #include <linux/i2c.h>
16f5d69f62SLinus Walleij #include <linux/led-class-flash.h>
17f5d69f62SLinus Walleij #include <linux/leds.h>
18f5d69f62SLinus Walleij #include <linux/module.h>
19f5d69f62SLinus Walleij #include <linux/mutex.h>
20f5d69f62SLinus Walleij #include <linux/property.h>
21f5d69f62SLinus Walleij #include <linux/slab.h>
22f5d69f62SLinus Walleij
23f5d69f62SLinus Walleij #include <media/v4l2-flash-led-class.h>
24f5d69f62SLinus Walleij
25f5d69f62SLinus Walleij #define AS_TIMER_US_TO_CODE(t) (((t) / 1000 - 100) / 50)
26f5d69f62SLinus Walleij #define AS_TIMER_CODE_TO_US(c) ((50 * (c) + 100) * 1000)
27f5d69f62SLinus Walleij
28f5d69f62SLinus Walleij /* Register definitions */
29f5d69f62SLinus Walleij
30f5d69f62SLinus Walleij /* Read-only Design info register: Reset state: xxxx 0001 */
31f5d69f62SLinus Walleij #define AS_DESIGN_INFO_REG 0x00
32f5d69f62SLinus Walleij #define AS_DESIGN_INFO_FACTORY(x) (((x) >> 4))
33f5d69f62SLinus Walleij #define AS_DESIGN_INFO_MODEL(x) ((x) & 0x0f)
34f5d69f62SLinus Walleij
35f5d69f62SLinus Walleij /* Read-only Version control register: Reset state: 0000 0000
36f5d69f62SLinus Walleij * for first engineering samples
37f5d69f62SLinus Walleij */
38f5d69f62SLinus Walleij #define AS_VERSION_CONTROL_REG 0x01
39f5d69f62SLinus Walleij #define AS_VERSION_CONTROL_RFU(x) (((x) >> 4))
40f5d69f62SLinus Walleij #define AS_VERSION_CONTROL_VERSION(x) ((x) & 0x0f)
41f5d69f62SLinus Walleij
42f5d69f62SLinus Walleij /* Read / Write (Indicator and timer register): Reset state: 0000 1111 */
43f5d69f62SLinus Walleij #define AS_INDICATOR_AND_TIMER_REG 0x02
44f5d69f62SLinus Walleij #define AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT 0
45f5d69f62SLinus Walleij #define AS_INDICATOR_AND_TIMER_VREF_SHIFT 4
46f5d69f62SLinus Walleij #define AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT 6
47f5d69f62SLinus Walleij
48f5d69f62SLinus Walleij /* Read / Write (Current set register): Reset state: 0110 1001 */
49f5d69f62SLinus Walleij #define AS_CURRENT_SET_REG 0x03
50f5d69f62SLinus Walleij #define AS_CURRENT_ASSIST_LIGHT_SHIFT 0
51f5d69f62SLinus Walleij #define AS_CURRENT_LED_DET_ON (1 << 3)
52f5d69f62SLinus Walleij #define AS_CURRENT_FLASH_CURRENT_SHIFT 4
53f5d69f62SLinus Walleij
54f5d69f62SLinus Walleij /* Read / Write (Control register): Reset state: 1011 0100 */
55f5d69f62SLinus Walleij #define AS_CONTROL_REG 0x04
56f5d69f62SLinus Walleij #define AS_CONTROL_MODE_SETTING_SHIFT 0
57f5d69f62SLinus Walleij #define AS_CONTROL_STROBE_ON (1 << 2)
58f5d69f62SLinus Walleij #define AS_CONTROL_OUT_ON (1 << 3)
59f5d69f62SLinus Walleij #define AS_CONTROL_EXT_TORCH_ON (1 << 4)
60f5d69f62SLinus Walleij #define AS_CONTROL_STROBE_TYPE_EDGE (0 << 5)
61f5d69f62SLinus Walleij #define AS_CONTROL_STROBE_TYPE_LEVEL (1 << 5)
62f5d69f62SLinus Walleij #define AS_CONTROL_COIL_PEAK_SHIFT 6
63f5d69f62SLinus Walleij
64f5d69f62SLinus Walleij /* Read only (D3 is read / write) (Fault and info): Reset state: 0000 x000 */
65f5d69f62SLinus Walleij #define AS_FAULT_INFO_REG 0x05
66f5d69f62SLinus Walleij #define AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT (1 << 1)
67f5d69f62SLinus Walleij #define AS_FAULT_INFO_INDICATOR_LED (1 << 2)
68f5d69f62SLinus Walleij #define AS_FAULT_INFO_LED_AMOUNT (1 << 3)
69f5d69f62SLinus Walleij #define AS_FAULT_INFO_TIMEOUT (1 << 4)
70f5d69f62SLinus Walleij #define AS_FAULT_INFO_OVER_TEMPERATURE (1 << 5)
71f5d69f62SLinus Walleij #define AS_FAULT_INFO_SHORT_CIRCUIT (1 << 6)
72f5d69f62SLinus Walleij #define AS_FAULT_INFO_OVER_VOLTAGE (1 << 7)
73f5d69f62SLinus Walleij
74f5d69f62SLinus Walleij /* Boost register */
75f5d69f62SLinus Walleij #define AS_BOOST_REG 0x0d
76f5d69f62SLinus Walleij #define AS_BOOST_CURRENT_DISABLE (0 << 0)
77f5d69f62SLinus Walleij #define AS_BOOST_CURRENT_ENABLE (1 << 0)
78f5d69f62SLinus Walleij
79f5d69f62SLinus Walleij /* Password register is used to unlock boost register writing */
80f5d69f62SLinus Walleij #define AS_PASSWORD_REG 0x0f
81f5d69f62SLinus Walleij #define AS_PASSWORD_UNLOCK_VALUE 0x55
82f5d69f62SLinus Walleij
83f5d69f62SLinus Walleij #define AS_NAME "as3645a"
84f5d69f62SLinus Walleij #define AS_I2C_ADDR (0x60 >> 1) /* W:0x60, R:0x61 */
85f5d69f62SLinus Walleij
86f5d69f62SLinus Walleij #define AS_FLASH_TIMEOUT_MIN 100000 /* us */
87f5d69f62SLinus Walleij #define AS_FLASH_TIMEOUT_MAX 850000
88f5d69f62SLinus Walleij #define AS_FLASH_TIMEOUT_STEP 50000
89f5d69f62SLinus Walleij
90f5d69f62SLinus Walleij #define AS_FLASH_INTENSITY_MIN 200000 /* uA */
91f5d69f62SLinus Walleij #define AS_FLASH_INTENSITY_MAX_1LED 500000
92f5d69f62SLinus Walleij #define AS_FLASH_INTENSITY_MAX_2LEDS 400000
93f5d69f62SLinus Walleij #define AS_FLASH_INTENSITY_STEP 20000
94f5d69f62SLinus Walleij
95f5d69f62SLinus Walleij #define AS_TORCH_INTENSITY_MIN 20000 /* uA */
96f5d69f62SLinus Walleij #define AS_TORCH_INTENSITY_MAX 160000
97f5d69f62SLinus Walleij #define AS_TORCH_INTENSITY_STEP 20000
98f5d69f62SLinus Walleij
99f5d69f62SLinus Walleij #define AS_INDICATOR_INTENSITY_MIN 0 /* uA */
100f5d69f62SLinus Walleij #define AS_INDICATOR_INTENSITY_MAX 10000
101f5d69f62SLinus Walleij #define AS_INDICATOR_INTENSITY_STEP 2500
102f5d69f62SLinus Walleij
103f5d69f62SLinus Walleij #define AS_PEAK_mA_MAX 2000
104f5d69f62SLinus Walleij #define AS_PEAK_mA_TO_REG(a) \
105f5d69f62SLinus Walleij ((min_t(u32, AS_PEAK_mA_MAX, a) - 1250) / 250)
106f5d69f62SLinus Walleij
107f5d69f62SLinus Walleij /* LED numbers for Devicetree */
108f5d69f62SLinus Walleij #define AS_LED_FLASH 0
109f5d69f62SLinus Walleij #define AS_LED_INDICATOR 1
110f5d69f62SLinus Walleij
111f5d69f62SLinus Walleij enum as_mode {
112f5d69f62SLinus Walleij AS_MODE_EXT_TORCH = 0 << AS_CONTROL_MODE_SETTING_SHIFT,
113f5d69f62SLinus Walleij AS_MODE_INDICATOR = 1 << AS_CONTROL_MODE_SETTING_SHIFT,
114f5d69f62SLinus Walleij AS_MODE_ASSIST = 2 << AS_CONTROL_MODE_SETTING_SHIFT,
115f5d69f62SLinus Walleij AS_MODE_FLASH = 3 << AS_CONTROL_MODE_SETTING_SHIFT,
116f5d69f62SLinus Walleij };
117f5d69f62SLinus Walleij
118f5d69f62SLinus Walleij struct as3645a_config {
119f5d69f62SLinus Walleij u32 flash_timeout_us;
120f5d69f62SLinus Walleij u32 flash_max_ua;
121f5d69f62SLinus Walleij u32 assist_max_ua;
122f5d69f62SLinus Walleij u32 indicator_max_ua;
123f5d69f62SLinus Walleij u32 voltage_reference;
124f5d69f62SLinus Walleij u32 peak;
125f5d69f62SLinus Walleij };
126f5d69f62SLinus Walleij
127f5d69f62SLinus Walleij struct as3645a {
128f5d69f62SLinus Walleij struct i2c_client *client;
129f5d69f62SLinus Walleij
130f5d69f62SLinus Walleij struct mutex mutex;
131f5d69f62SLinus Walleij
132f5d69f62SLinus Walleij struct led_classdev_flash fled;
133f5d69f62SLinus Walleij struct led_classdev iled_cdev;
134f5d69f62SLinus Walleij
135f5d69f62SLinus Walleij struct v4l2_flash *vf;
136f5d69f62SLinus Walleij struct v4l2_flash *vfind;
137f5d69f62SLinus Walleij
138f5d69f62SLinus Walleij struct fwnode_handle *flash_node;
139f5d69f62SLinus Walleij struct fwnode_handle *indicator_node;
140f5d69f62SLinus Walleij
141f5d69f62SLinus Walleij struct as3645a_config cfg;
142f5d69f62SLinus Walleij
143f5d69f62SLinus Walleij enum as_mode mode;
144f5d69f62SLinus Walleij unsigned int timeout;
145f5d69f62SLinus Walleij unsigned int flash_current;
146f5d69f62SLinus Walleij unsigned int assist_current;
147f5d69f62SLinus Walleij unsigned int indicator_current;
148f5d69f62SLinus Walleij enum v4l2_flash_strobe_source strobe_source;
149f5d69f62SLinus Walleij };
150f5d69f62SLinus Walleij
151f5d69f62SLinus Walleij #define fled_to_as3645a(__fled) container_of(__fled, struct as3645a, fled)
152f5d69f62SLinus Walleij #define iled_cdev_to_as3645a(__iled_cdev) \
153f5d69f62SLinus Walleij container_of(__iled_cdev, struct as3645a, iled_cdev)
154f5d69f62SLinus Walleij
155f5d69f62SLinus Walleij /* Return negative errno else zero on success */
as3645a_write(struct as3645a * flash,u8 addr,u8 val)156f5d69f62SLinus Walleij static int as3645a_write(struct as3645a *flash, u8 addr, u8 val)
157f5d69f62SLinus Walleij {
158f5d69f62SLinus Walleij struct i2c_client *client = flash->client;
159f5d69f62SLinus Walleij int rval;
160f5d69f62SLinus Walleij
161f5d69f62SLinus Walleij rval = i2c_smbus_write_byte_data(client, addr, val);
162f5d69f62SLinus Walleij
163f5d69f62SLinus Walleij dev_dbg(&client->dev, "Write Addr:%02X Val:%02X %s\n", addr, val,
164f5d69f62SLinus Walleij rval < 0 ? "fail" : "ok");
165f5d69f62SLinus Walleij
166f5d69f62SLinus Walleij return rval;
167f5d69f62SLinus Walleij }
168f5d69f62SLinus Walleij
169f5d69f62SLinus Walleij /* Return negative errno else a data byte received from the device. */
as3645a_read(struct as3645a * flash,u8 addr)170f5d69f62SLinus Walleij static int as3645a_read(struct as3645a *flash, u8 addr)
171f5d69f62SLinus Walleij {
172f5d69f62SLinus Walleij struct i2c_client *client = flash->client;
173f5d69f62SLinus Walleij int rval;
174f5d69f62SLinus Walleij
175f5d69f62SLinus Walleij rval = i2c_smbus_read_byte_data(client, addr);
176f5d69f62SLinus Walleij
177f5d69f62SLinus Walleij dev_dbg(&client->dev, "Read Addr:%02X Val:%02X %s\n", addr, rval,
178f5d69f62SLinus Walleij rval < 0 ? "fail" : "ok");
179f5d69f62SLinus Walleij
180f5d69f62SLinus Walleij return rval;
181f5d69f62SLinus Walleij }
182f5d69f62SLinus Walleij
183f5d69f62SLinus Walleij /* -----------------------------------------------------------------------------
184f5d69f62SLinus Walleij * Hardware configuration and trigger
185f5d69f62SLinus Walleij */
186f5d69f62SLinus Walleij
187f5d69f62SLinus Walleij /**
188f5d69f62SLinus Walleij * as3645a_set_current - Set flash configuration registers
189f5d69f62SLinus Walleij * @flash: The flash
190f5d69f62SLinus Walleij *
191f5d69f62SLinus Walleij * Configure the hardware with flash, assist and indicator currents, as well as
192f5d69f62SLinus Walleij * flash timeout.
193f5d69f62SLinus Walleij *
194f5d69f62SLinus Walleij * Return 0 on success, or a negative error code if an I2C communication error
195f5d69f62SLinus Walleij * occurred.
196f5d69f62SLinus Walleij */
as3645a_set_current(struct as3645a * flash)197f5d69f62SLinus Walleij static int as3645a_set_current(struct as3645a *flash)
198f5d69f62SLinus Walleij {
199f5d69f62SLinus Walleij u8 val;
200f5d69f62SLinus Walleij
201f5d69f62SLinus Walleij val = (flash->flash_current << AS_CURRENT_FLASH_CURRENT_SHIFT)
202f5d69f62SLinus Walleij | (flash->assist_current << AS_CURRENT_ASSIST_LIGHT_SHIFT)
203f5d69f62SLinus Walleij | AS_CURRENT_LED_DET_ON;
204f5d69f62SLinus Walleij
205f5d69f62SLinus Walleij return as3645a_write(flash, AS_CURRENT_SET_REG, val);
206f5d69f62SLinus Walleij }
207f5d69f62SLinus Walleij
as3645a_set_timeout(struct as3645a * flash)208f5d69f62SLinus Walleij static int as3645a_set_timeout(struct as3645a *flash)
209f5d69f62SLinus Walleij {
210f5d69f62SLinus Walleij u8 val;
211f5d69f62SLinus Walleij
212f5d69f62SLinus Walleij val = flash->timeout << AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT;
213f5d69f62SLinus Walleij
214f5d69f62SLinus Walleij val |= (flash->cfg.voltage_reference
215f5d69f62SLinus Walleij << AS_INDICATOR_AND_TIMER_VREF_SHIFT)
216f5d69f62SLinus Walleij | ((flash->indicator_current ? flash->indicator_current - 1 : 0)
217f5d69f62SLinus Walleij << AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT);
218f5d69f62SLinus Walleij
219f5d69f62SLinus Walleij return as3645a_write(flash, AS_INDICATOR_AND_TIMER_REG, val);
220f5d69f62SLinus Walleij }
221f5d69f62SLinus Walleij
222f5d69f62SLinus Walleij /**
223f5d69f62SLinus Walleij * as3645a_set_control - Set flash control register
224f5d69f62SLinus Walleij * @flash: The flash
225f5d69f62SLinus Walleij * @mode: Desired output mode
226f5d69f62SLinus Walleij * @on: Desired output state
227f5d69f62SLinus Walleij *
228f5d69f62SLinus Walleij * Configure the hardware with output mode and state.
229f5d69f62SLinus Walleij *
230f5d69f62SLinus Walleij * Return 0 on success, or a negative error code if an I2C communication error
231f5d69f62SLinus Walleij * occurred.
232f5d69f62SLinus Walleij */
233f5d69f62SLinus Walleij static int
as3645a_set_control(struct as3645a * flash,enum as_mode mode,bool on)234f5d69f62SLinus Walleij as3645a_set_control(struct as3645a *flash, enum as_mode mode, bool on)
235f5d69f62SLinus Walleij {
236f5d69f62SLinus Walleij u8 reg;
237f5d69f62SLinus Walleij
238f5d69f62SLinus Walleij /* Configure output parameters and operation mode. */
239f5d69f62SLinus Walleij reg = (flash->cfg.peak << AS_CONTROL_COIL_PEAK_SHIFT)
240f5d69f62SLinus Walleij | (on ? AS_CONTROL_OUT_ON : 0)
241f5d69f62SLinus Walleij | mode;
242f5d69f62SLinus Walleij
243f5d69f62SLinus Walleij if (mode == AS_MODE_FLASH &&
244f5d69f62SLinus Walleij flash->strobe_source == V4L2_FLASH_STROBE_SOURCE_EXTERNAL)
245f5d69f62SLinus Walleij reg |= AS_CONTROL_STROBE_TYPE_LEVEL
246f5d69f62SLinus Walleij | AS_CONTROL_STROBE_ON;
247f5d69f62SLinus Walleij
248f5d69f62SLinus Walleij return as3645a_write(flash, AS_CONTROL_REG, reg);
249f5d69f62SLinus Walleij }
250f5d69f62SLinus Walleij
as3645a_get_fault(struct led_classdev_flash * fled,u32 * fault)251f5d69f62SLinus Walleij static int as3645a_get_fault(struct led_classdev_flash *fled, u32 *fault)
252f5d69f62SLinus Walleij {
253f5d69f62SLinus Walleij struct as3645a *flash = fled_to_as3645a(fled);
254f5d69f62SLinus Walleij int rval;
255f5d69f62SLinus Walleij
256f5d69f62SLinus Walleij /* NOTE: reading register clears fault status */
257f5d69f62SLinus Walleij rval = as3645a_read(flash, AS_FAULT_INFO_REG);
258f5d69f62SLinus Walleij if (rval < 0)
259f5d69f62SLinus Walleij return rval;
260f5d69f62SLinus Walleij
261f5d69f62SLinus Walleij if (rval & AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT)
262f5d69f62SLinus Walleij *fault |= LED_FAULT_OVER_CURRENT;
263f5d69f62SLinus Walleij
264f5d69f62SLinus Walleij if (rval & AS_FAULT_INFO_INDICATOR_LED)
265f5d69f62SLinus Walleij *fault |= LED_FAULT_INDICATOR;
266f5d69f62SLinus Walleij
267f5d69f62SLinus Walleij dev_dbg(&flash->client->dev, "%u connected LEDs\n",
268f5d69f62SLinus Walleij rval & AS_FAULT_INFO_LED_AMOUNT ? 2 : 1);
269f5d69f62SLinus Walleij
270f5d69f62SLinus Walleij if (rval & AS_FAULT_INFO_TIMEOUT)
271f5d69f62SLinus Walleij *fault |= LED_FAULT_TIMEOUT;
272f5d69f62SLinus Walleij
273f5d69f62SLinus Walleij if (rval & AS_FAULT_INFO_OVER_TEMPERATURE)
274f5d69f62SLinus Walleij *fault |= LED_FAULT_OVER_TEMPERATURE;
275f5d69f62SLinus Walleij
276f5d69f62SLinus Walleij if (rval & AS_FAULT_INFO_SHORT_CIRCUIT)
277f5d69f62SLinus Walleij *fault |= LED_FAULT_OVER_CURRENT;
278f5d69f62SLinus Walleij
279f5d69f62SLinus Walleij if (rval & AS_FAULT_INFO_OVER_VOLTAGE)
280f5d69f62SLinus Walleij *fault |= LED_FAULT_INPUT_VOLTAGE;
281f5d69f62SLinus Walleij
282f5d69f62SLinus Walleij return rval;
283f5d69f62SLinus Walleij }
284f5d69f62SLinus Walleij
__as3645a_current_to_reg(unsigned int min,unsigned int max,unsigned int step,unsigned int val)285f5d69f62SLinus Walleij static unsigned int __as3645a_current_to_reg(unsigned int min, unsigned int max,
286f5d69f62SLinus Walleij unsigned int step,
287f5d69f62SLinus Walleij unsigned int val)
288f5d69f62SLinus Walleij {
289f5d69f62SLinus Walleij if (val < min)
290f5d69f62SLinus Walleij val = min;
291f5d69f62SLinus Walleij
292f5d69f62SLinus Walleij if (val > max)
293f5d69f62SLinus Walleij val = max;
294f5d69f62SLinus Walleij
295f5d69f62SLinus Walleij return (val - min) / step;
296f5d69f62SLinus Walleij }
297f5d69f62SLinus Walleij
as3645a_current_to_reg(struct as3645a * flash,bool is_flash,unsigned int ua)298f5d69f62SLinus Walleij static unsigned int as3645a_current_to_reg(struct as3645a *flash, bool is_flash,
299f5d69f62SLinus Walleij unsigned int ua)
300f5d69f62SLinus Walleij {
301f5d69f62SLinus Walleij if (is_flash)
302f5d69f62SLinus Walleij return __as3645a_current_to_reg(AS_TORCH_INTENSITY_MIN,
303f5d69f62SLinus Walleij flash->cfg.assist_max_ua,
304f5d69f62SLinus Walleij AS_TORCH_INTENSITY_STEP, ua);
305f5d69f62SLinus Walleij else
306f5d69f62SLinus Walleij return __as3645a_current_to_reg(AS_FLASH_INTENSITY_MIN,
307f5d69f62SLinus Walleij flash->cfg.flash_max_ua,
308f5d69f62SLinus Walleij AS_FLASH_INTENSITY_STEP, ua);
309f5d69f62SLinus Walleij }
310f5d69f62SLinus Walleij
as3645a_set_indicator_brightness(struct led_classdev * iled_cdev,enum led_brightness brightness)311f5d69f62SLinus Walleij static int as3645a_set_indicator_brightness(struct led_classdev *iled_cdev,
312f5d69f62SLinus Walleij enum led_brightness brightness)
313f5d69f62SLinus Walleij {
314f5d69f62SLinus Walleij struct as3645a *flash = iled_cdev_to_as3645a(iled_cdev);
315f5d69f62SLinus Walleij int rval;
316f5d69f62SLinus Walleij
317f5d69f62SLinus Walleij flash->indicator_current = brightness;
318f5d69f62SLinus Walleij
319f5d69f62SLinus Walleij rval = as3645a_set_timeout(flash);
320f5d69f62SLinus Walleij if (rval)
321f5d69f62SLinus Walleij return rval;
322f5d69f62SLinus Walleij
323f5d69f62SLinus Walleij return as3645a_set_control(flash, AS_MODE_INDICATOR, brightness);
324f5d69f62SLinus Walleij }
325f5d69f62SLinus Walleij
as3645a_set_assist_brightness(struct led_classdev * fled_cdev,enum led_brightness brightness)326f5d69f62SLinus Walleij static int as3645a_set_assist_brightness(struct led_classdev *fled_cdev,
327f5d69f62SLinus Walleij enum led_brightness brightness)
328f5d69f62SLinus Walleij {
329f5d69f62SLinus Walleij struct led_classdev_flash *fled = lcdev_to_flcdev(fled_cdev);
330f5d69f62SLinus Walleij struct as3645a *flash = fled_to_as3645a(fled);
331f5d69f62SLinus Walleij int rval;
332f5d69f62SLinus Walleij
333f5d69f62SLinus Walleij if (brightness) {
334f5d69f62SLinus Walleij /* Register value 0 is 20 mA. */
335f5d69f62SLinus Walleij flash->assist_current = brightness - 1;
336f5d69f62SLinus Walleij
337f5d69f62SLinus Walleij rval = as3645a_set_current(flash);
338f5d69f62SLinus Walleij if (rval)
339f5d69f62SLinus Walleij return rval;
340f5d69f62SLinus Walleij }
341f5d69f62SLinus Walleij
342f5d69f62SLinus Walleij return as3645a_set_control(flash, AS_MODE_ASSIST, brightness);
343f5d69f62SLinus Walleij }
344f5d69f62SLinus Walleij
as3645a_set_flash_brightness(struct led_classdev_flash * fled,u32 brightness_ua)345f5d69f62SLinus Walleij static int as3645a_set_flash_brightness(struct led_classdev_flash *fled,
346f5d69f62SLinus Walleij u32 brightness_ua)
347f5d69f62SLinus Walleij {
348f5d69f62SLinus Walleij struct as3645a *flash = fled_to_as3645a(fled);
349f5d69f62SLinus Walleij
350f5d69f62SLinus Walleij flash->flash_current = as3645a_current_to_reg(flash, true,
351f5d69f62SLinus Walleij brightness_ua);
352f5d69f62SLinus Walleij
353f5d69f62SLinus Walleij return as3645a_set_current(flash);
354f5d69f62SLinus Walleij }
355f5d69f62SLinus Walleij
as3645a_set_flash_timeout(struct led_classdev_flash * fled,u32 timeout_us)356f5d69f62SLinus Walleij static int as3645a_set_flash_timeout(struct led_classdev_flash *fled,
357f5d69f62SLinus Walleij u32 timeout_us)
358f5d69f62SLinus Walleij {
359f5d69f62SLinus Walleij struct as3645a *flash = fled_to_as3645a(fled);
360f5d69f62SLinus Walleij
361f5d69f62SLinus Walleij flash->timeout = AS_TIMER_US_TO_CODE(timeout_us);
362f5d69f62SLinus Walleij
363f5d69f62SLinus Walleij return as3645a_set_timeout(flash);
364f5d69f62SLinus Walleij }
365f5d69f62SLinus Walleij
as3645a_set_strobe(struct led_classdev_flash * fled,bool state)366f5d69f62SLinus Walleij static int as3645a_set_strobe(struct led_classdev_flash *fled, bool state)
367f5d69f62SLinus Walleij {
368f5d69f62SLinus Walleij struct as3645a *flash = fled_to_as3645a(fled);
369f5d69f62SLinus Walleij
370f5d69f62SLinus Walleij return as3645a_set_control(flash, AS_MODE_FLASH, state);
371f5d69f62SLinus Walleij }
372f5d69f62SLinus Walleij
373f5d69f62SLinus Walleij static const struct led_flash_ops as3645a_led_flash_ops = {
374f5d69f62SLinus Walleij .flash_brightness_set = as3645a_set_flash_brightness,
375f5d69f62SLinus Walleij .timeout_set = as3645a_set_flash_timeout,
376f5d69f62SLinus Walleij .strobe_set = as3645a_set_strobe,
377f5d69f62SLinus Walleij .fault_get = as3645a_get_fault,
378f5d69f62SLinus Walleij };
379f5d69f62SLinus Walleij
as3645a_setup(struct as3645a * flash)380f5d69f62SLinus Walleij static int as3645a_setup(struct as3645a *flash)
381f5d69f62SLinus Walleij {
382f5d69f62SLinus Walleij struct device *dev = &flash->client->dev;
383f5d69f62SLinus Walleij u32 fault = 0;
384f5d69f62SLinus Walleij int rval;
385f5d69f62SLinus Walleij
386f5d69f62SLinus Walleij /* clear errors */
387f5d69f62SLinus Walleij rval = as3645a_read(flash, AS_FAULT_INFO_REG);
388f5d69f62SLinus Walleij if (rval < 0)
389f5d69f62SLinus Walleij return rval;
390f5d69f62SLinus Walleij
391f5d69f62SLinus Walleij dev_dbg(dev, "Fault info: %02x\n", rval);
392f5d69f62SLinus Walleij
393f5d69f62SLinus Walleij rval = as3645a_set_current(flash);
394f5d69f62SLinus Walleij if (rval < 0)
395f5d69f62SLinus Walleij return rval;
396f5d69f62SLinus Walleij
397f5d69f62SLinus Walleij rval = as3645a_set_timeout(flash);
398f5d69f62SLinus Walleij if (rval < 0)
399f5d69f62SLinus Walleij return rval;
400f5d69f62SLinus Walleij
401f5d69f62SLinus Walleij rval = as3645a_set_control(flash, AS_MODE_INDICATOR, false);
402f5d69f62SLinus Walleij if (rval < 0)
403f5d69f62SLinus Walleij return rval;
404f5d69f62SLinus Walleij
405f5d69f62SLinus Walleij /* read status */
406f5d69f62SLinus Walleij rval = as3645a_get_fault(&flash->fled, &fault);
407f5d69f62SLinus Walleij if (rval < 0)
408f5d69f62SLinus Walleij return rval;
409f5d69f62SLinus Walleij
410f5d69f62SLinus Walleij dev_dbg(dev, "AS_INDICATOR_AND_TIMER_REG: %02x\n",
411f5d69f62SLinus Walleij as3645a_read(flash, AS_INDICATOR_AND_TIMER_REG));
412f5d69f62SLinus Walleij dev_dbg(dev, "AS_CURRENT_SET_REG: %02x\n",
413f5d69f62SLinus Walleij as3645a_read(flash, AS_CURRENT_SET_REG));
414f5d69f62SLinus Walleij dev_dbg(dev, "AS_CONTROL_REG: %02x\n",
415f5d69f62SLinus Walleij as3645a_read(flash, AS_CONTROL_REG));
416f5d69f62SLinus Walleij
417f5d69f62SLinus Walleij return rval & ~AS_FAULT_INFO_LED_AMOUNT ? -EIO : 0;
418f5d69f62SLinus Walleij }
419f5d69f62SLinus Walleij
as3645a_detect(struct as3645a * flash)420f5d69f62SLinus Walleij static int as3645a_detect(struct as3645a *flash)
421f5d69f62SLinus Walleij {
422f5d69f62SLinus Walleij struct device *dev = &flash->client->dev;
423f5d69f62SLinus Walleij int rval, man, model, rfu, version;
424f5d69f62SLinus Walleij const char *vendor;
425f5d69f62SLinus Walleij
426f5d69f62SLinus Walleij rval = as3645a_read(flash, AS_DESIGN_INFO_REG);
427f5d69f62SLinus Walleij if (rval < 0) {
428f5d69f62SLinus Walleij dev_err(dev, "can't read design info reg\n");
429f5d69f62SLinus Walleij return rval;
430f5d69f62SLinus Walleij }
431f5d69f62SLinus Walleij
432f5d69f62SLinus Walleij man = AS_DESIGN_INFO_FACTORY(rval);
433f5d69f62SLinus Walleij model = AS_DESIGN_INFO_MODEL(rval);
434f5d69f62SLinus Walleij
435f5d69f62SLinus Walleij rval = as3645a_read(flash, AS_VERSION_CONTROL_REG);
436f5d69f62SLinus Walleij if (rval < 0) {
437f5d69f62SLinus Walleij dev_err(dev, "can't read version control reg\n");
438f5d69f62SLinus Walleij return rval;
439f5d69f62SLinus Walleij }
440f5d69f62SLinus Walleij
441f5d69f62SLinus Walleij rfu = AS_VERSION_CONTROL_RFU(rval);
442f5d69f62SLinus Walleij version = AS_VERSION_CONTROL_VERSION(rval);
443f5d69f62SLinus Walleij
444f5d69f62SLinus Walleij /* Verify the chip model and version. */
445f5d69f62SLinus Walleij if (model != 0x01 || rfu != 0x00) {
446f5d69f62SLinus Walleij dev_err(dev, "AS3645A not detected (model %d rfu %d)\n",
447f5d69f62SLinus Walleij model, rfu);
448f5d69f62SLinus Walleij return -ENODEV;
449f5d69f62SLinus Walleij }
450f5d69f62SLinus Walleij
451f5d69f62SLinus Walleij switch (man) {
452f5d69f62SLinus Walleij case 1:
453f5d69f62SLinus Walleij vendor = "AMS, Austria Micro Systems";
454f5d69f62SLinus Walleij break;
455f5d69f62SLinus Walleij case 2:
456f5d69f62SLinus Walleij vendor = "ADI, Analog Devices Inc.";
457f5d69f62SLinus Walleij break;
458f5d69f62SLinus Walleij case 3:
459f5d69f62SLinus Walleij vendor = "NSC, National Semiconductor";
460f5d69f62SLinus Walleij break;
461f5d69f62SLinus Walleij case 4:
462f5d69f62SLinus Walleij vendor = "NXP";
463f5d69f62SLinus Walleij break;
464f5d69f62SLinus Walleij case 5:
465f5d69f62SLinus Walleij vendor = "TI, Texas Instrument";
466f5d69f62SLinus Walleij break;
467f5d69f62SLinus Walleij default:
468f5d69f62SLinus Walleij vendor = "Unknown";
469f5d69f62SLinus Walleij }
470f5d69f62SLinus Walleij
471f5d69f62SLinus Walleij dev_info(dev, "Chip vendor: %s (%d) Version: %d\n", vendor,
472f5d69f62SLinus Walleij man, version);
473f5d69f62SLinus Walleij
474f5d69f62SLinus Walleij rval = as3645a_write(flash, AS_PASSWORD_REG, AS_PASSWORD_UNLOCK_VALUE);
475f5d69f62SLinus Walleij if (rval < 0)
476f5d69f62SLinus Walleij return rval;
477f5d69f62SLinus Walleij
478f5d69f62SLinus Walleij return as3645a_write(flash, AS_BOOST_REG, AS_BOOST_CURRENT_DISABLE);
479f5d69f62SLinus Walleij }
480f5d69f62SLinus Walleij
as3645a_parse_node(struct as3645a * flash,struct fwnode_handle * fwnode)481f5d69f62SLinus Walleij static int as3645a_parse_node(struct as3645a *flash,
482f5d69f62SLinus Walleij struct fwnode_handle *fwnode)
483f5d69f62SLinus Walleij {
484f5d69f62SLinus Walleij struct as3645a_config *cfg = &flash->cfg;
485f5d69f62SLinus Walleij struct fwnode_handle *child;
486f5d69f62SLinus Walleij int rval;
487f5d69f62SLinus Walleij
488f5d69f62SLinus Walleij fwnode_for_each_child_node(fwnode, child) {
489f5d69f62SLinus Walleij u32 id = 0;
490f5d69f62SLinus Walleij
491f5d69f62SLinus Walleij fwnode_property_read_u32(child, "reg", &id);
492f5d69f62SLinus Walleij
493f5d69f62SLinus Walleij switch (id) {
494f5d69f62SLinus Walleij case AS_LED_FLASH:
495f5d69f62SLinus Walleij flash->flash_node = child;
496f5d69f62SLinus Walleij fwnode_handle_get(child);
497f5d69f62SLinus Walleij break;
498f5d69f62SLinus Walleij case AS_LED_INDICATOR:
499f5d69f62SLinus Walleij flash->indicator_node = child;
500f5d69f62SLinus Walleij fwnode_handle_get(child);
501f5d69f62SLinus Walleij break;
502f5d69f62SLinus Walleij default:
503f5d69f62SLinus Walleij dev_warn(&flash->client->dev,
504f5d69f62SLinus Walleij "unknown LED %u encountered, ignoring\n", id);
505f5d69f62SLinus Walleij break;
506f5d69f62SLinus Walleij }
507f5d69f62SLinus Walleij }
508f5d69f62SLinus Walleij
509f5d69f62SLinus Walleij if (!flash->flash_node) {
510f5d69f62SLinus Walleij dev_err(&flash->client->dev, "can't find flash node\n");
511f5d69f62SLinus Walleij return -ENODEV;
512f5d69f62SLinus Walleij }
513f5d69f62SLinus Walleij
514f5d69f62SLinus Walleij rval = fwnode_property_read_u32(flash->flash_node, "flash-timeout-us",
515f5d69f62SLinus Walleij &cfg->flash_timeout_us);
516f5d69f62SLinus Walleij if (rval < 0) {
517f5d69f62SLinus Walleij dev_err(&flash->client->dev,
518f5d69f62SLinus Walleij "can't read flash-timeout-us property for flash\n");
519f5d69f62SLinus Walleij goto out_err;
520f5d69f62SLinus Walleij }
521f5d69f62SLinus Walleij
522f5d69f62SLinus Walleij rval = fwnode_property_read_u32(flash->flash_node, "flash-max-microamp",
523f5d69f62SLinus Walleij &cfg->flash_max_ua);
524f5d69f62SLinus Walleij if (rval < 0) {
525f5d69f62SLinus Walleij dev_err(&flash->client->dev,
526f5d69f62SLinus Walleij "can't read flash-max-microamp property for flash\n");
527f5d69f62SLinus Walleij goto out_err;
528f5d69f62SLinus Walleij }
529f5d69f62SLinus Walleij
530f5d69f62SLinus Walleij rval = fwnode_property_read_u32(flash->flash_node, "led-max-microamp",
531f5d69f62SLinus Walleij &cfg->assist_max_ua);
532f5d69f62SLinus Walleij if (rval < 0) {
533f5d69f62SLinus Walleij dev_err(&flash->client->dev,
534f5d69f62SLinus Walleij "can't read led-max-microamp property for flash\n");
535f5d69f62SLinus Walleij goto out_err;
536f5d69f62SLinus Walleij }
537f5d69f62SLinus Walleij
538f5d69f62SLinus Walleij fwnode_property_read_u32(flash->flash_node, "voltage-reference",
539f5d69f62SLinus Walleij &cfg->voltage_reference);
540f5d69f62SLinus Walleij
541f5d69f62SLinus Walleij fwnode_property_read_u32(flash->flash_node, "ams,input-max-microamp",
542f5d69f62SLinus Walleij &cfg->peak);
543f5d69f62SLinus Walleij cfg->peak = AS_PEAK_mA_TO_REG(cfg->peak);
544f5d69f62SLinus Walleij
545f5d69f62SLinus Walleij if (!flash->indicator_node) {
546f5d69f62SLinus Walleij dev_warn(&flash->client->dev,
547f5d69f62SLinus Walleij "can't find indicator node\n");
548f5d69f62SLinus Walleij rval = -ENODEV;
549f5d69f62SLinus Walleij goto out_err;
550f5d69f62SLinus Walleij }
551f5d69f62SLinus Walleij
552f5d69f62SLinus Walleij
553f5d69f62SLinus Walleij rval = fwnode_property_read_u32(flash->indicator_node,
554f5d69f62SLinus Walleij "led-max-microamp",
555f5d69f62SLinus Walleij &cfg->indicator_max_ua);
556f5d69f62SLinus Walleij if (rval < 0) {
557f5d69f62SLinus Walleij dev_err(&flash->client->dev,
558f5d69f62SLinus Walleij "can't read led-max-microamp property for indicator\n");
559f5d69f62SLinus Walleij goto out_err;
560f5d69f62SLinus Walleij }
561f5d69f62SLinus Walleij
562f5d69f62SLinus Walleij return 0;
563f5d69f62SLinus Walleij
564f5d69f62SLinus Walleij out_err:
565f5d69f62SLinus Walleij fwnode_handle_put(flash->flash_node);
566f5d69f62SLinus Walleij fwnode_handle_put(flash->indicator_node);
567f5d69f62SLinus Walleij
568f5d69f62SLinus Walleij return rval;
569f5d69f62SLinus Walleij }
570f5d69f62SLinus Walleij
as3645a_led_class_setup(struct as3645a * flash)571f5d69f62SLinus Walleij static int as3645a_led_class_setup(struct as3645a *flash)
572f5d69f62SLinus Walleij {
573f5d69f62SLinus Walleij struct led_classdev *fled_cdev = &flash->fled.led_cdev;
574f5d69f62SLinus Walleij struct led_classdev *iled_cdev = &flash->iled_cdev;
575f5d69f62SLinus Walleij struct led_init_data init_data = {};
576f5d69f62SLinus Walleij struct led_flash_setting *cfg;
577f5d69f62SLinus Walleij int rval;
578f5d69f62SLinus Walleij
579f5d69f62SLinus Walleij iled_cdev->brightness_set_blocking = as3645a_set_indicator_brightness;
580f5d69f62SLinus Walleij iled_cdev->max_brightness =
581f5d69f62SLinus Walleij flash->cfg.indicator_max_ua / AS_INDICATOR_INTENSITY_STEP;
582f5d69f62SLinus Walleij iled_cdev->flags = LED_CORE_SUSPENDRESUME;
583f5d69f62SLinus Walleij
584f5d69f62SLinus Walleij init_data.fwnode = flash->indicator_node;
585f5d69f62SLinus Walleij init_data.devicename = AS_NAME;
586f5d69f62SLinus Walleij init_data.default_label = "indicator";
587f5d69f62SLinus Walleij
588f5d69f62SLinus Walleij rval = led_classdev_register_ext(&flash->client->dev, iled_cdev,
589f5d69f62SLinus Walleij &init_data);
590f5d69f62SLinus Walleij if (rval < 0)
591f5d69f62SLinus Walleij return rval;
592f5d69f62SLinus Walleij
593f5d69f62SLinus Walleij cfg = &flash->fled.brightness;
594f5d69f62SLinus Walleij cfg->min = AS_FLASH_INTENSITY_MIN;
595f5d69f62SLinus Walleij cfg->max = flash->cfg.flash_max_ua;
596f5d69f62SLinus Walleij cfg->step = AS_FLASH_INTENSITY_STEP;
597f5d69f62SLinus Walleij cfg->val = flash->cfg.flash_max_ua;
598f5d69f62SLinus Walleij
599f5d69f62SLinus Walleij cfg = &flash->fled.timeout;
600f5d69f62SLinus Walleij cfg->min = AS_FLASH_TIMEOUT_MIN;
601f5d69f62SLinus Walleij cfg->max = flash->cfg.flash_timeout_us;
602f5d69f62SLinus Walleij cfg->step = AS_FLASH_TIMEOUT_STEP;
603f5d69f62SLinus Walleij cfg->val = flash->cfg.flash_timeout_us;
604f5d69f62SLinus Walleij
605f5d69f62SLinus Walleij flash->fled.ops = &as3645a_led_flash_ops;
606f5d69f62SLinus Walleij
607f5d69f62SLinus Walleij fled_cdev->brightness_set_blocking = as3645a_set_assist_brightness;
608f5d69f62SLinus Walleij /* Value 0 is off in LED class. */
609f5d69f62SLinus Walleij fled_cdev->max_brightness =
610f5d69f62SLinus Walleij as3645a_current_to_reg(flash, false,
611f5d69f62SLinus Walleij flash->cfg.assist_max_ua) + 1;
612f5d69f62SLinus Walleij fled_cdev->flags = LED_DEV_CAP_FLASH | LED_CORE_SUSPENDRESUME;
613f5d69f62SLinus Walleij
614f5d69f62SLinus Walleij init_data.fwnode = flash->flash_node;
615f5d69f62SLinus Walleij init_data.devicename = AS_NAME;
616f5d69f62SLinus Walleij init_data.default_label = "flash";
617f5d69f62SLinus Walleij
618f5d69f62SLinus Walleij rval = led_classdev_flash_register_ext(&flash->client->dev,
619f5d69f62SLinus Walleij &flash->fled, &init_data);
620f5d69f62SLinus Walleij if (rval)
621f5d69f62SLinus Walleij goto out_err;
622f5d69f62SLinus Walleij
623f5d69f62SLinus Walleij return rval;
624f5d69f62SLinus Walleij
625f5d69f62SLinus Walleij out_err:
626f5d69f62SLinus Walleij led_classdev_unregister(iled_cdev);
627f5d69f62SLinus Walleij dev_err(&flash->client->dev,
628f5d69f62SLinus Walleij "led_classdev_flash_register() failed, error %d\n",
629f5d69f62SLinus Walleij rval);
630f5d69f62SLinus Walleij return rval;
631f5d69f62SLinus Walleij }
632f5d69f62SLinus Walleij
as3645a_v4l2_setup(struct as3645a * flash)633f5d69f62SLinus Walleij static int as3645a_v4l2_setup(struct as3645a *flash)
634f5d69f62SLinus Walleij {
635f5d69f62SLinus Walleij struct led_classdev_flash *fled = &flash->fled;
636f5d69f62SLinus Walleij struct led_classdev *led = &fled->led_cdev;
637f5d69f62SLinus Walleij struct v4l2_flash_config cfg = {
638f5d69f62SLinus Walleij .intensity = {
639f5d69f62SLinus Walleij .min = AS_TORCH_INTENSITY_MIN,
640f5d69f62SLinus Walleij .max = flash->cfg.assist_max_ua,
641f5d69f62SLinus Walleij .step = AS_TORCH_INTENSITY_STEP,
642f5d69f62SLinus Walleij .val = flash->cfg.assist_max_ua,
643f5d69f62SLinus Walleij },
644f5d69f62SLinus Walleij };
645f5d69f62SLinus Walleij struct v4l2_flash_config cfgind = {
646f5d69f62SLinus Walleij .intensity = {
647f5d69f62SLinus Walleij .min = AS_INDICATOR_INTENSITY_MIN,
648f5d69f62SLinus Walleij .max = flash->cfg.indicator_max_ua,
649f5d69f62SLinus Walleij .step = AS_INDICATOR_INTENSITY_STEP,
650f5d69f62SLinus Walleij .val = flash->cfg.indicator_max_ua,
651f5d69f62SLinus Walleij },
652f5d69f62SLinus Walleij };
653f5d69f62SLinus Walleij
654*36af333aSAzeem Shaikh strscpy(cfg.dev_name, led->dev->kobj.name, sizeof(cfg.dev_name));
655*36af333aSAzeem Shaikh strscpy(cfgind.dev_name, flash->iled_cdev.dev->kobj.name,
656f5d69f62SLinus Walleij sizeof(cfgind.dev_name));
657f5d69f62SLinus Walleij
658f5d69f62SLinus Walleij flash->vf = v4l2_flash_init(
659f5d69f62SLinus Walleij &flash->client->dev, flash->flash_node, &flash->fled, NULL,
660f5d69f62SLinus Walleij &cfg);
661f5d69f62SLinus Walleij if (IS_ERR(flash->vf))
662f5d69f62SLinus Walleij return PTR_ERR(flash->vf);
663f5d69f62SLinus Walleij
664f5d69f62SLinus Walleij flash->vfind = v4l2_flash_indicator_init(
665f5d69f62SLinus Walleij &flash->client->dev, flash->indicator_node, &flash->iled_cdev,
666f5d69f62SLinus Walleij &cfgind);
667f5d69f62SLinus Walleij if (IS_ERR(flash->vfind)) {
668f5d69f62SLinus Walleij v4l2_flash_release(flash->vf);
669f5d69f62SLinus Walleij return PTR_ERR(flash->vfind);
670f5d69f62SLinus Walleij }
671f5d69f62SLinus Walleij
672f5d69f62SLinus Walleij return 0;
673f5d69f62SLinus Walleij }
674f5d69f62SLinus Walleij
as3645a_probe(struct i2c_client * client)675f5d69f62SLinus Walleij static int as3645a_probe(struct i2c_client *client)
676f5d69f62SLinus Walleij {
677f5d69f62SLinus Walleij struct as3645a *flash;
678f5d69f62SLinus Walleij int rval;
679f5d69f62SLinus Walleij
680f5d69f62SLinus Walleij if (!dev_fwnode(&client->dev))
681f5d69f62SLinus Walleij return -ENODEV;
682f5d69f62SLinus Walleij
683f5d69f62SLinus Walleij flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);
684f5d69f62SLinus Walleij if (flash == NULL)
685f5d69f62SLinus Walleij return -ENOMEM;
686f5d69f62SLinus Walleij
687f5d69f62SLinus Walleij flash->client = client;
688f5d69f62SLinus Walleij
689f5d69f62SLinus Walleij rval = as3645a_parse_node(flash, dev_fwnode(&client->dev));
690f5d69f62SLinus Walleij if (rval < 0)
691f5d69f62SLinus Walleij return rval;
692f5d69f62SLinus Walleij
693f5d69f62SLinus Walleij rval = as3645a_detect(flash);
694f5d69f62SLinus Walleij if (rval < 0)
695f5d69f62SLinus Walleij goto out_put_nodes;
696f5d69f62SLinus Walleij
697f5d69f62SLinus Walleij mutex_init(&flash->mutex);
698f5d69f62SLinus Walleij i2c_set_clientdata(client, flash);
699f5d69f62SLinus Walleij
700f5d69f62SLinus Walleij rval = as3645a_setup(flash);
701f5d69f62SLinus Walleij if (rval)
702f5d69f62SLinus Walleij goto out_mutex_destroy;
703f5d69f62SLinus Walleij
704f5d69f62SLinus Walleij rval = as3645a_led_class_setup(flash);
705f5d69f62SLinus Walleij if (rval)
706f5d69f62SLinus Walleij goto out_mutex_destroy;
707f5d69f62SLinus Walleij
708f5d69f62SLinus Walleij rval = as3645a_v4l2_setup(flash);
709f5d69f62SLinus Walleij if (rval)
710f5d69f62SLinus Walleij goto out_led_classdev_flash_unregister;
711f5d69f62SLinus Walleij
712f5d69f62SLinus Walleij return 0;
713f5d69f62SLinus Walleij
714f5d69f62SLinus Walleij out_led_classdev_flash_unregister:
715f5d69f62SLinus Walleij led_classdev_flash_unregister(&flash->fled);
716f5d69f62SLinus Walleij
717f5d69f62SLinus Walleij out_mutex_destroy:
718f5d69f62SLinus Walleij mutex_destroy(&flash->mutex);
719f5d69f62SLinus Walleij
720f5d69f62SLinus Walleij out_put_nodes:
721f5d69f62SLinus Walleij fwnode_handle_put(flash->flash_node);
722f5d69f62SLinus Walleij fwnode_handle_put(flash->indicator_node);
723f5d69f62SLinus Walleij
724f5d69f62SLinus Walleij return rval;
725f5d69f62SLinus Walleij }
726f5d69f62SLinus Walleij
as3645a_remove(struct i2c_client * client)727ed5c2f5fSUwe Kleine-König static void as3645a_remove(struct i2c_client *client)
728f5d69f62SLinus Walleij {
729f5d69f62SLinus Walleij struct as3645a *flash = i2c_get_clientdata(client);
730f5d69f62SLinus Walleij
731f5d69f62SLinus Walleij as3645a_set_control(flash, AS_MODE_EXT_TORCH, false);
732f5d69f62SLinus Walleij
733f5d69f62SLinus Walleij v4l2_flash_release(flash->vf);
734f5d69f62SLinus Walleij v4l2_flash_release(flash->vfind);
735f5d69f62SLinus Walleij
736f5d69f62SLinus Walleij led_classdev_flash_unregister(&flash->fled);
737f5d69f62SLinus Walleij led_classdev_unregister(&flash->iled_cdev);
738f5d69f62SLinus Walleij
739f5d69f62SLinus Walleij mutex_destroy(&flash->mutex);
740f5d69f62SLinus Walleij
741f5d69f62SLinus Walleij fwnode_handle_put(flash->flash_node);
742f5d69f62SLinus Walleij fwnode_handle_put(flash->indicator_node);
743f5d69f62SLinus Walleij }
744f5d69f62SLinus Walleij
745f5d69f62SLinus Walleij static const struct i2c_device_id as3645a_id_table[] = {
746f5d69f62SLinus Walleij { AS_NAME, 0 },
747f5d69f62SLinus Walleij { },
748f5d69f62SLinus Walleij };
749f5d69f62SLinus Walleij MODULE_DEVICE_TABLE(i2c, as3645a_id_table);
750f5d69f62SLinus Walleij
751f5d69f62SLinus Walleij static const struct of_device_id as3645a_of_table[] = {
752f5d69f62SLinus Walleij { .compatible = "ams,as3645a" },
753f5d69f62SLinus Walleij { },
754f5d69f62SLinus Walleij };
755f5d69f62SLinus Walleij MODULE_DEVICE_TABLE(of, as3645a_of_table);
756f5d69f62SLinus Walleij
757f5d69f62SLinus Walleij static struct i2c_driver as3645a_i2c_driver = {
758f5d69f62SLinus Walleij .driver = {
759f5d69f62SLinus Walleij .of_match_table = as3645a_of_table,
760f5d69f62SLinus Walleij .name = AS_NAME,
761f5d69f62SLinus Walleij },
762d9ff8a8eSUwe Kleine-König .probe = as3645a_probe,
763f5d69f62SLinus Walleij .remove = as3645a_remove,
764f5d69f62SLinus Walleij .id_table = as3645a_id_table,
765f5d69f62SLinus Walleij };
766f5d69f62SLinus Walleij
767f5d69f62SLinus Walleij module_i2c_driver(as3645a_i2c_driver);
768f5d69f62SLinus Walleij
769f5d69f62SLinus Walleij MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
770f5d69f62SLinus Walleij MODULE_AUTHOR("Sakari Ailus <sakari.ailus@iki.fi>");
771f5d69f62SLinus Walleij MODULE_DESCRIPTION("LED flash driver for AS3645A, LM3555 and their clones");
772f5d69f62SLinus Walleij MODULE_LICENSE("GPL v2");
773