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powerpc/mm: Drop the unnecessary region check
[linux-2.6-block.git] / drivers / hwmon / aspeed-pwm-tacho.c
CommitLineData
2d7a548a
JRN		 1/*
2 * Copyright (c) 2016 Google, Inc
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 or later as
6 * published by the Free Software Foundation.
7 */
8
9#include <linux/clk.h>
54b943e6 10#include <linux/delay.h>
7ed1c5e5 11#include <linux/errno.h>
2d7a548a 12#include <linux/gpio/consumer.h>
2d7a548a
JRN		 13#include <linux/hwmon.h>
14#include <linux/hwmon-sysfs.h>
15#include <linux/io.h>
16#include <linux/kernel.h>
17#include <linux/module.h>
2d7a548a 18#include <linux/of_device.h>
54b943e6 19#include <linux/of_platform.h>
2d7a548a 20#include <linux/platform_device.h>
2d7a548a 21#include <linux/regmap.h>
18c514cc 22#include <linux/reset.h>
54b943e6 23#include <linux/sysfs.h>
f198907d 24#include <linux/thermal.h>
2d7a548a
JRN		 25
26/* ASPEED PWM & FAN Tach Register Definition */
27#define ASPEED_PTCR_CTRL 0x00
28#define ASPEED_PTCR_CLK_CTRL 0x04
29#define ASPEED_PTCR_DUTY0_CTRL 0x08
30#define ASPEED_PTCR_DUTY1_CTRL 0x0c
31#define ASPEED_PTCR_TYPEM_CTRL 0x10
32#define ASPEED_PTCR_TYPEM_CTRL1 0x14
33#define ASPEED_PTCR_TYPEN_CTRL 0x18
34#define ASPEED_PTCR_TYPEN_CTRL1 0x1c
35#define ASPEED_PTCR_TACH_SOURCE 0x20
36#define ASPEED_PTCR_TRIGGER 0x28
37#define ASPEED_PTCR_RESULT 0x2c
38#define ASPEED_PTCR_INTR_CTRL 0x30
39#define ASPEED_PTCR_INTR_STS 0x34
40#define ASPEED_PTCR_TYPEM_LIMIT 0x38
41#define ASPEED_PTCR_TYPEN_LIMIT 0x3C
42#define ASPEED_PTCR_CTRL_EXT 0x40
43#define ASPEED_PTCR_CLK_CTRL_EXT 0x44
44#define ASPEED_PTCR_DUTY2_CTRL 0x48
45#define ASPEED_PTCR_DUTY3_CTRL 0x4c
46#define ASPEED_PTCR_TYPEO_CTRL 0x50
47#define ASPEED_PTCR_TYPEO_CTRL1 0x54
48#define ASPEED_PTCR_TACH_SOURCE_EXT 0x60
49#define ASPEED_PTCR_TYPEO_LIMIT 0x78
50
51/* ASPEED_PTCR_CTRL : 0x00 - General Control Register */
52#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART1 15
53#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART2 6
54#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_MASK (BIT(7) | BIT(15))
55
56#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART1 14
57#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART2 5
58#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_MASK (BIT(6) | BIT(14))
59
60#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART1 13
61#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART2 4
62#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_MASK (BIT(5) | BIT(13))
63
64#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART1 12
65#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART2 3
66#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_MASK (BIT(4) | BIT(12))
67
68#define ASPEED_PTCR_CTRL_FAN_NUM_EN(x) BIT(16 + (x))
69
70#define ASPEED_PTCR_CTRL_PWMD_EN BIT(11)
71#define ASPEED_PTCR_CTRL_PWMC_EN BIT(10)
72#define ASPEED_PTCR_CTRL_PWMB_EN BIT(9)
73#define ASPEED_PTCR_CTRL_PWMA_EN BIT(8)
74
75#define ASPEED_PTCR_CTRL_CLK_SRC BIT(1)
76#define ASPEED_PTCR_CTRL_CLK_EN BIT(0)
77
78/* ASPEED_PTCR_CLK_CTRL : 0x04 - Clock Control Register */
79/* TYPE N */
80#define ASPEED_PTCR_CLK_CTRL_TYPEN_MASK GENMASK(31, 16)
81#define ASPEED_PTCR_CLK_CTRL_TYPEN_UNIT 24
82#define ASPEED_PTCR_CLK_CTRL_TYPEN_H 20
83#define ASPEED_PTCR_CLK_CTRL_TYPEN_L 16
84/* TYPE M */
85#define ASPEED_PTCR_CLK_CTRL_TYPEM_MASK GENMASK(15, 0)
86#define ASPEED_PTCR_CLK_CTRL_TYPEM_UNIT 8
87#define ASPEED_PTCR_CLK_CTRL_TYPEM_H 4
88#define ASPEED_PTCR_CLK_CTRL_TYPEM_L 0
89
90/*
91 * ASPEED_PTCR_DUTY_CTRL/1/2/3 : 0x08/0x0C/0x48/0x4C - PWM-FAN duty control
92 * 0/1/2/3 register
93 */
94#define DUTY_CTRL_PWM2_FALL_POINT 24
95#define DUTY_CTRL_PWM2_RISE_POINT 16
96#define DUTY_CTRL_PWM2_RISE_FALL_MASK GENMASK(31, 16)
97#define DUTY_CTRL_PWM1_FALL_POINT 8
98#define DUTY_CTRL_PWM1_RISE_POINT 0
99#define DUTY_CTRL_PWM1_RISE_FALL_MASK GENMASK(15, 0)
100
101/* ASPEED_PTCR_TYPEM_CTRL : 0x10/0x18/0x50 - Type M/N/O Ctrl 0 Register */
102#define TYPE_CTRL_FAN_MASK (GENMASK(5, 1) | GENMASK(31, 16))
103#define TYPE_CTRL_FAN1_MASK GENMASK(31, 0)
104#define TYPE_CTRL_FAN_PERIOD 16
105#define TYPE_CTRL_FAN_MODE 4
106#define TYPE_CTRL_FAN_DIVISION 1
107#define TYPE_CTRL_FAN_TYPE_EN 1
108
109/* ASPEED_PTCR_TACH_SOURCE : 0x20/0x60 - Tach Source Register */
110/* bit [0,1] at 0x20, bit [2] at 0x60 */
111#define TACH_PWM_SOURCE_BIT01(x) ((x) * 2)
112#define TACH_PWM_SOURCE_BIT2(x) ((x) * 2)
113#define TACH_PWM_SOURCE_MASK_BIT01(x) (0x3 << ((x) * 2))
114#define TACH_PWM_SOURCE_MASK_BIT2(x) BIT((x) * 2)
115
116/* ASPEED_PTCR_RESULT : 0x2c - Result Register */
117#define RESULT_STATUS_MASK BIT(31)
118#define RESULT_VALUE_MASK 0xfffff
119
120/* ASPEED_PTCR_CTRL_EXT : 0x40 - General Control Extension #1 Register */
121#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART1 15
122#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART2 6
123#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_MASK (BIT(7) | BIT(15))
124
125#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART1 14
126#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART2 5
127#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_MASK (BIT(6) | BIT(14))
128
129#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART1 13
130#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART2 4
131#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_MASK (BIT(5) | BIT(13))
132
133#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART1 12
134#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART2 3
135#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_MASK (BIT(4) | BIT(12))
136
137#define ASPEED_PTCR_CTRL_PWMH_EN BIT(11)
138#define ASPEED_PTCR_CTRL_PWMG_EN BIT(10)
139#define ASPEED_PTCR_CTRL_PWMF_EN BIT(9)
140#define ASPEED_PTCR_CTRL_PWME_EN BIT(8)
141
142/* ASPEED_PTCR_CLK_EXT_CTRL : 0x44 - Clock Control Extension #1 Register */
143/* TYPE O */
144#define ASPEED_PTCR_CLK_CTRL_TYPEO_MASK GENMASK(15, 0)
145#define ASPEED_PTCR_CLK_CTRL_TYPEO_UNIT 8
146#define ASPEED_PTCR_CLK_CTRL_TYPEO_H 4
147#define ASPEED_PTCR_CLK_CTRL_TYPEO_L 0
148
149#define PWM_MAX 255
150
1e276292
PV		 151#define BOTH_EDGES 0x02 /* 10b */
152
2d7a548a
JRN		 153#define M_PWM_DIV_H 0x00
154#define M_PWM_DIV_L 0x05
155#define M_PWM_PERIOD 0x5F
156#define M_TACH_CLK_DIV 0x00
1e276292
PV		 157/*
158 * 5:4 Type N fan tach mode selection bit:
159 * 00: falling
160 * 01: rising
161 * 10: both
162 * 11: reserved.
163 */
164#define M_TACH_MODE 0x02 /* 10b */
762b1e88 165#define M_TACH_UNIT 0x0210
2d7a548a
JRN		 166#define INIT_FAN_CTRL 0xFF
167
44b41366
PV		 168/* How long we sleep in us while waiting for an RPM result. */
169#define ASPEED_RPM_STATUS_SLEEP_USEC 500
170
f198907d
MK		 171#define MAX_CDEV_NAME_LEN 16
172
173struct aspeed_cooling_device {
174 char name[16];
175 struct aspeed_pwm_tacho_data *priv;
176 struct thermal_cooling_device *tcdev;
177 int pwm_port;
178 u8 *cooling_levels;
179 u8 max_state;
180 u8 cur_state;
181};
182
2d7a548a
JRN		 183struct aspeed_pwm_tacho_data {
184 struct regmap *regmap;
18c514cc 185 struct reset_control *rst;
2d7a548a
JRN		 186 unsigned long clk_freq;
187 bool pwm_present[8];
188 bool fan_tach_present[16];
189 u8 type_pwm_clock_unit[3];
190 u8 type_pwm_clock_division_h[3];
191 u8 type_pwm_clock_division_l[3];
192 u8 type_fan_tach_clock_division[3];
1e276292 193 u8 type_fan_tach_mode[3];
2d7a548a
JRN		 194 u16 type_fan_tach_unit[3];
195 u8 pwm_port_type[8];
196 u8 pwm_port_fan_ctrl[8];
197 u8 fan_tach_ch_source[16];
f198907d 198 struct aspeed_cooling_device *cdev[8];
2d7a548a
JRN		 199 const struct attribute_group *groups[3];
200};
201
202enum type { TYPEM, TYPEN, TYPEO };
203
204struct type_params {
205 u32 l_value;
206 u32 h_value;
207 u32 unit_value;
208 u32 clk_ctrl_mask;
209 u32 clk_ctrl_reg;
210 u32 ctrl_reg;
211 u32 ctrl_reg1;
212};
213
214static const struct type_params type_params[] = {
215 [TYPEM] = {
216 .l_value = ASPEED_PTCR_CLK_CTRL_TYPEM_L,
217 .h_value = ASPEED_PTCR_CLK_CTRL_TYPEM_H,
218 .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEM_UNIT,
219 .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEM_MASK,
220 .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL,
221 .ctrl_reg = ASPEED_PTCR_TYPEM_CTRL,
222 .ctrl_reg1 = ASPEED_PTCR_TYPEM_CTRL1,
223 },
224 [TYPEN] = {
225 .l_value = ASPEED_PTCR_CLK_CTRL_TYPEN_L,
226 .h_value = ASPEED_PTCR_CLK_CTRL_TYPEN_H,
227 .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEN_UNIT,
228 .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEN_MASK,
229 .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL,
230 .ctrl_reg = ASPEED_PTCR_TYPEN_CTRL,
231 .ctrl_reg1 = ASPEED_PTCR_TYPEN_CTRL1,
232 },
233 [TYPEO] = {
234 .l_value = ASPEED_PTCR_CLK_CTRL_TYPEO_L,
235 .h_value = ASPEED_PTCR_CLK_CTRL_TYPEO_H,
236 .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEO_UNIT,
237 .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEO_MASK,
238 .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL_EXT,
239 .ctrl_reg = ASPEED_PTCR_TYPEO_CTRL,
240 .ctrl_reg1 = ASPEED_PTCR_TYPEO_CTRL1,
241 }
242};
243
244enum pwm_port { PWMA, PWMB, PWMC, PWMD, PWME, PWMF, PWMG, PWMH };
245
246struct pwm_port_params {
247 u32 pwm_en;
248 u32 ctrl_reg;
249 u32 type_part1;
250 u32 type_part2;
251 u32 type_mask;
252 u32 duty_ctrl_rise_point;
253 u32 duty_ctrl_fall_point;
254 u32 duty_ctrl_reg;
255 u32 duty_ctrl_rise_fall_mask;
256};
257
258static const struct pwm_port_params pwm_port_params[] = {
259 [PWMA] = {
260 .pwm_en = ASPEED_PTCR_CTRL_PWMA_EN,
261 .ctrl_reg = ASPEED_PTCR_CTRL,
262 .type_part1 = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART1,
263 .type_part2 = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART2,
264 .type_mask = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_MASK,
265 .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
266 .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
267 .duty_ctrl_reg = ASPEED_PTCR_DUTY0_CTRL,
268 .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
269 },
270 [PWMB] = {
271 .pwm_en = ASPEED_PTCR_CTRL_PWMB_EN,
272 .ctrl_reg = ASPEED_PTCR_CTRL,
273 .type_part1 = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART1,
274 .type_part2 = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART2,
275 .type_mask = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_MASK,
276 .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
277 .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
278 .duty_ctrl_reg = ASPEED_PTCR_DUTY0_CTRL,
279 .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
280 },
281 [PWMC] = {
282 .pwm_en = ASPEED_PTCR_CTRL_PWMC_EN,
283 .ctrl_reg = ASPEED_PTCR_CTRL,
284 .type_part1 = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART1,
285 .type_part2 = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART2,
286 .type_mask = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_MASK,
287 .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
288 .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
289 .duty_ctrl_reg = ASPEED_PTCR_DUTY1_CTRL,
290 .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
291 },
292 [PWMD] = {
293 .pwm_en = ASPEED_PTCR_CTRL_PWMD_EN,
294 .ctrl_reg = ASPEED_PTCR_CTRL,
295 .type_part1 = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART1,
296 .type_part2 = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART2,
297 .type_mask = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_MASK,
298 .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
299 .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
300 .duty_ctrl_reg = ASPEED_PTCR_DUTY1_CTRL,
301 .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
302 },
303 [PWME] = {
304 .pwm_en = ASPEED_PTCR_CTRL_PWME_EN,
305 .ctrl_reg = ASPEED_PTCR_CTRL_EXT,
306 .type_part1 = ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART1,
307 .type_part2 = ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART2,
308 .type_mask = ASPEED_PTCR_CTRL_SET_PWME_TYPE_MASK,
309 .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
310 .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
311 .duty_ctrl_reg = ASPEED_PTCR_DUTY2_CTRL,
312 .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
313 },
314 [PWMF] = {
315 .pwm_en = ASPEED_PTCR_CTRL_PWMF_EN,
316 .ctrl_reg = ASPEED_PTCR_CTRL_EXT,
317 .type_part1 = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART1,
318 .type_part2 = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART2,
319 .type_mask = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_MASK,
320 .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
321 .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
322 .duty_ctrl_reg = ASPEED_PTCR_DUTY2_CTRL,
323 .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
324 },
325 [PWMG] = {
326 .pwm_en = ASPEED_PTCR_CTRL_PWMG_EN,
327 .ctrl_reg = ASPEED_PTCR_CTRL_EXT,
328 .type_part1 = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART1,
329 .type_part2 = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART2,
330 .type_mask = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_MASK,
331 .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
332 .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
333 .duty_ctrl_reg = ASPEED_PTCR_DUTY3_CTRL,
334 .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
335 },
336 [PWMH] = {
337 .pwm_en = ASPEED_PTCR_CTRL_PWMH_EN,
338 .ctrl_reg = ASPEED_PTCR_CTRL_EXT,
339 .type_part1 = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART1,
340 .type_part2 = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART2,
341 .type_mask = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_MASK,
342 .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
343 .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
344 .duty_ctrl_reg = ASPEED_PTCR_DUTY3_CTRL,
345 .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
346 }
347};
348
349static int regmap_aspeed_pwm_tacho_reg_write(void *context, unsigned int reg,
350 unsigned int val)
351{
352 void __iomem *regs = (void __iomem *)context;
353
354 writel(val, regs + reg);
355 return 0;
356}
357
358static int regmap_aspeed_pwm_tacho_reg_read(void *context, unsigned int reg,
359 unsigned int *val)
360{
361 void __iomem *regs = (void __iomem *)context;
362
363 *val = readl(regs + reg);
364 return 0;
365}
366
367static const struct regmap_config aspeed_pwm_tacho_regmap_config = {
368 .reg_bits = 32,
369 .val_bits = 32,
370 .reg_stride = 4,
371 .max_register = ASPEED_PTCR_TYPEO_LIMIT,
372 .reg_write = regmap_aspeed_pwm_tacho_reg_write,
373 .reg_read = regmap_aspeed_pwm_tacho_reg_read,
374 .fast_io = true,
375};
376
377static void aspeed_set_clock_enable(struct regmap *regmap, bool val)
378{
379 regmap_update_bits(regmap, ASPEED_PTCR_CTRL,
380 ASPEED_PTCR_CTRL_CLK_EN,
381 val ? ASPEED_PTCR_CTRL_CLK_EN : 0);
382}
383
384static void aspeed_set_clock_source(struct regmap *regmap, int val)
385{
386 regmap_update_bits(regmap, ASPEED_PTCR_CTRL,
387 ASPEED_PTCR_CTRL_CLK_SRC,
388 val ? ASPEED_PTCR_CTRL_CLK_SRC : 0);
389}
390
391static void aspeed_set_pwm_clock_values(struct regmap *regmap, u8 type,
392 u8 div_high, u8 div_low, u8 unit)
393{
394 u32 reg_value = ((div_high << type_params[type].h_value) |
395 (div_low << type_params[type].l_value) |
396 (unit << type_params[type].unit_value));
397
398 regmap_update_bits(regmap, type_params[type].clk_ctrl_reg,
399 type_params[type].clk_ctrl_mask, reg_value);
400}
401
402static void aspeed_set_pwm_port_enable(struct regmap *regmap, u8 pwm_port,
403 bool enable)
404{
405 regmap_update_bits(regmap, pwm_port_params[pwm_port].ctrl_reg,
406 pwm_port_params[pwm_port].pwm_en,
407 enable ? pwm_port_params[pwm_port].pwm_en : 0);
408}
409
410static void aspeed_set_pwm_port_type(struct regmap *regmap,
411 u8 pwm_port, u8 type)
412{
413 u32 reg_value = (type & 0x1) << pwm_port_params[pwm_port].type_part1;
414
415 reg_value |= (type & 0x2) << pwm_port_params[pwm_port].type_part2;
416
417 regmap_update_bits(regmap, pwm_port_params[pwm_port].ctrl_reg,
418 pwm_port_params[pwm_port].type_mask, reg_value);
419}
420
421static void aspeed_set_pwm_port_duty_rising_falling(struct regmap *regmap,
422 u8 pwm_port, u8 rising,
423 u8 falling)
424{
425 u32 reg_value = (rising <<
426 pwm_port_params[pwm_port].duty_ctrl_rise_point);
427 reg_value |= (falling <<
428 pwm_port_params[pwm_port].duty_ctrl_fall_point);
429
430 regmap_update_bits(regmap, pwm_port_params[pwm_port].duty_ctrl_reg,
431 pwm_port_params[pwm_port].duty_ctrl_rise_fall_mask,
432 reg_value);
433}
434
435static void aspeed_set_tacho_type_enable(struct regmap *regmap, u8 type,
436 bool enable)
437{
438 regmap_update_bits(regmap, type_params[type].ctrl_reg,
439 TYPE_CTRL_FAN_TYPE_EN,
440 enable ? TYPE_CTRL_FAN_TYPE_EN : 0);
441}
442
443static void aspeed_set_tacho_type_values(struct regmap *regmap, u8 type,
444 u8 mode, u16 unit, u8 division)
445{
446 u32 reg_value = ((mode << TYPE_CTRL_FAN_MODE) |
447 (unit << TYPE_CTRL_FAN_PERIOD) |
448 (division << TYPE_CTRL_FAN_DIVISION));
449
450 regmap_update_bits(regmap, type_params[type].ctrl_reg,
451 TYPE_CTRL_FAN_MASK, reg_value);
452 regmap_update_bits(regmap, type_params[type].ctrl_reg1,
453 TYPE_CTRL_FAN1_MASK, unit << 16);
454}
455
456static void aspeed_set_fan_tach_ch_enable(struct regmap *regmap, u8 fan_tach_ch,
457 bool enable)
458{
459 regmap_update_bits(regmap, ASPEED_PTCR_CTRL,
460 ASPEED_PTCR_CTRL_FAN_NUM_EN(fan_tach_ch),
461 enable ?
462 ASPEED_PTCR_CTRL_FAN_NUM_EN(fan_tach_ch) : 0);
463}
464
465static void aspeed_set_fan_tach_ch_source(struct regmap *regmap, u8 fan_tach_ch,
466 u8 fan_tach_ch_source)
467{
468 u32 reg_value1 = ((fan_tach_ch_source & 0x3) <<
469 TACH_PWM_SOURCE_BIT01(fan_tach_ch));
470 u32 reg_value2 = (((fan_tach_ch_source & 0x4) >> 2) <<
471 TACH_PWM_SOURCE_BIT2(fan_tach_ch));
472
473 regmap_update_bits(regmap, ASPEED_PTCR_TACH_SOURCE,
474 TACH_PWM_SOURCE_MASK_BIT01(fan_tach_ch),
475 reg_value1);
476
477 regmap_update_bits(regmap, ASPEED_PTCR_TACH_SOURCE_EXT,
478 TACH_PWM_SOURCE_MASK_BIT2(fan_tach_ch),
479 reg_value2);
480}
481
482static void aspeed_set_pwm_port_fan_ctrl(struct aspeed_pwm_tacho_data *priv,
483 u8 index, u8 fan_ctrl)
484{
485 u16 period, dc_time_on;
486
487 period = priv->type_pwm_clock_unit[priv->pwm_port_type[index]];
488 period += 1;
489 dc_time_on = (fan_ctrl * period) / PWM_MAX;
490
491 if (dc_time_on == 0) {
492 aspeed_set_pwm_port_enable(priv->regmap, index, false);
493 } else {
494 if (dc_time_on == period)
495 dc_time_on = 0;
496
497 aspeed_set_pwm_port_duty_rising_falling(priv->regmap, index, 0,
498 dc_time_on);
499 aspeed_set_pwm_port_enable(priv->regmap, index, true);
500 }
501}
502
503static u32 aspeed_get_fan_tach_ch_measure_period(struct aspeed_pwm_tacho_data
504 *priv, u8 type)
505{
506 u32 clk;
507 u16 tacho_unit;
508 u8 clk_unit, div_h, div_l, tacho_div;
509
510 clk = priv->clk_freq;
511 clk_unit = priv->type_pwm_clock_unit[type];
512 div_h = priv->type_pwm_clock_division_h[type];
513 div_h = 0x1 << div_h;
514 div_l = priv->type_pwm_clock_division_l[type];
515 if (div_l == 0)
516 div_l = 1;
517 else
518 div_l = div_l * 2;
519
520 tacho_unit = priv->type_fan_tach_unit[type];
521 tacho_div = priv->type_fan_tach_clock_division[type];
522
523 tacho_div = 0x4 << (tacho_div * 2);
524 return clk / (clk_unit * div_h * div_l * tacho_div * tacho_unit);
525}
526
7ed1c5e5 527static int aspeed_get_fan_tach_ch_rpm(struct aspeed_pwm_tacho_data *priv,
2d7a548a
JRN		 528 u8 fan_tach_ch)
529{
44b41366 530 u32 raw_data, tach_div, clk_source, msec, usec, val;
1e276292 531 u8 fan_tach_ch_source, type, mode, both;
44b41366 532 int ret;
2d7a548a
JRN		 533
534 regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0);
535 regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0x1 << fan_tach_ch);
536
537 fan_tach_ch_source = priv->fan_tach_ch_source[fan_tach_ch];
538 type = priv->pwm_port_type[fan_tach_ch_source];
539
44b41366
PV		 540 msec = (1000 / aspeed_get_fan_tach_ch_measure_period(priv, type));
541 usec = msec * 1000;
542
543 ret = regmap_read_poll_timeout(
544 priv->regmap,
545 ASPEED_PTCR_RESULT,
546 val,
547 (val & RESULT_STATUS_MASK),
548 ASPEED_RPM_STATUS_SLEEP_USEC,
549 usec);
2d7a548a 550
44b41366
PV		 551 /* return -ETIMEDOUT if we didn't get an answer. */
552 if (ret)
553 return ret;
7ed1c5e5 554
2d7a548a
JRN		 555 raw_data = val & RESULT_VALUE_MASK;
556 tach_div = priv->type_fan_tach_clock_division[type];
1e276292
PV		 557 /*
558 * We need the mode to determine if the raw_data is double (from
559 * counting both edges).
560 */
561 mode = priv->type_fan_tach_mode[type];
562 both = (mode & BOTH_EDGES) ? 1 : 0;
563
564 tach_div = (0x4 << both) << (tach_div * 2);
2d7a548a
JRN		 565 clk_source = priv->clk_freq;
566
567 if (raw_data == 0)
568 return 0;
569
570 return (clk_source * 60) / (2 * raw_data * tach_div);
571}
572
e98dd538
GR		 573static ssize_t pwm_store(struct device *dev, struct device_attribute *attr,
574 const char *buf, size_t count)
2d7a548a
JRN		 575{
576 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
577 int index = sensor_attr->index;
578 int ret;
579 struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
580 long fan_ctrl;
581
582 ret = kstrtol(buf, 10, &fan_ctrl);
583 if (ret != 0)
584 return ret;
585
586 if (fan_ctrl < 0 || fan_ctrl > PWM_MAX)
587 return -EINVAL;
588
589 if (priv->pwm_port_fan_ctrl[index] == fan_ctrl)
590 return count;
591
592 priv->pwm_port_fan_ctrl[index] = fan_ctrl;
593 aspeed_set_pwm_port_fan_ctrl(priv, index, fan_ctrl);
594
595 return count;
596}
597
e98dd538 598static ssize_t pwm_show(struct device *dev, struct device_attribute *attr,
2d7a548a
JRN		 599 char *buf)
600{
601 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
602 int index = sensor_attr->index;
603 struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
604
605 return sprintf(buf, "%u\n", priv->pwm_port_fan_ctrl[index]);
606}
607
e98dd538 608static ssize_t rpm_show(struct device *dev, struct device_attribute *attr,
2d7a548a
JRN		 609 char *buf)
610{
611 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
612 int index = sensor_attr->index;
7ed1c5e5 613 int rpm;
2d7a548a
JRN		 614 struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
615
616 rpm = aspeed_get_fan_tach_ch_rpm(priv, index);
7ed1c5e5
PV		 617 if (rpm < 0)
618 return rpm;
2d7a548a 619
7ed1c5e5 620 return sprintf(buf, "%d\n", rpm);
2d7a548a
JRN		 621}
622
623static umode_t pwm_is_visible(struct kobject *kobj,
624 struct attribute *a, int index)
625{
626 struct device *dev = container_of(kobj, struct device, kobj);
627 struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
628
629 if (!priv->pwm_present[index])
630 return 0;
631 return a->mode;
632}
633
634static umode_t fan_dev_is_visible(struct kobject *kobj,
635 struct attribute *a, int index)
636{
637 struct device *dev = container_of(kobj, struct device, kobj);
638 struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
639
640 if (!priv->fan_tach_present[index])
641 return 0;
642 return a->mode;
643}
644
e98dd538
GR		 645static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
646static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
647static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
648static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3);
649static SENSOR_DEVICE_ATTR_RW(pwm5, pwm, 4);
650static SENSOR_DEVICE_ATTR_RW(pwm6, pwm, 5);
651static SENSOR_DEVICE_ATTR_RW(pwm7, pwm, 6);
652static SENSOR_DEVICE_ATTR_RW(pwm8, pwm, 7);
2d7a548a 653static struct attribute *pwm_dev_attrs[] = {
2d7a548a
JRN		 654 &sensor_dev_attr_pwm1.dev_attr.attr,
655 &sensor_dev_attr_pwm2.dev_attr.attr,
656 &sensor_dev_attr_pwm3.dev_attr.attr,
657 &sensor_dev_attr_pwm4.dev_attr.attr,
658 &sensor_dev_attr_pwm5.dev_attr.attr,
659 &sensor_dev_attr_pwm6.dev_attr.attr,
660 &sensor_dev_attr_pwm7.dev_attr.attr,
5f348fa3 661 &sensor_dev_attr_pwm8.dev_attr.attr,
2d7a548a
JRN		 662 NULL,
663};
664
665static const struct attribute_group pwm_dev_group = {
666 .attrs = pwm_dev_attrs,
667 .is_visible = pwm_is_visible,
668};
669
e98dd538
GR		 670static SENSOR_DEVICE_ATTR_RO(fan1_input, rpm, 0);
671static SENSOR_DEVICE_ATTR_RO(fan2_input, rpm, 1);
672static SENSOR_DEVICE_ATTR_RO(fan3_input, rpm, 2);
673static SENSOR_DEVICE_ATTR_RO(fan4_input, rpm, 3);
674static SENSOR_DEVICE_ATTR_RO(fan5_input, rpm, 4);
675static SENSOR_DEVICE_ATTR_RO(fan6_input, rpm, 5);
676static SENSOR_DEVICE_ATTR_RO(fan7_input, rpm, 6);
677static SENSOR_DEVICE_ATTR_RO(fan8_input, rpm, 7);
678static SENSOR_DEVICE_ATTR_RO(fan9_input, rpm, 8);
679static SENSOR_DEVICE_ATTR_RO(fan10_input, rpm, 9);
680static SENSOR_DEVICE_ATTR_RO(fan11_input, rpm, 10);
681static SENSOR_DEVICE_ATTR_RO(fan12_input, rpm, 11);
682static SENSOR_DEVICE_ATTR_RO(fan13_input, rpm, 12);
683static SENSOR_DEVICE_ATTR_RO(fan14_input, rpm, 13);
684static SENSOR_DEVICE_ATTR_RO(fan15_input, rpm, 14);
685static SENSOR_DEVICE_ATTR_RO(fan16_input, rpm, 15);
2d7a548a 686static struct attribute *fan_dev_attrs[] = {
2d7a548a
JRN		 687 &sensor_dev_attr_fan1_input.dev_attr.attr,
688 &sensor_dev_attr_fan2_input.dev_attr.attr,
689 &sensor_dev_attr_fan3_input.dev_attr.attr,
690 &sensor_dev_attr_fan4_input.dev_attr.attr,
691 &sensor_dev_attr_fan5_input.dev_attr.attr,
692 &sensor_dev_attr_fan6_input.dev_attr.attr,
693 &sensor_dev_attr_fan7_input.dev_attr.attr,
694 &sensor_dev_attr_fan8_input.dev_attr.attr,
695 &sensor_dev_attr_fan9_input.dev_attr.attr,
696 &sensor_dev_attr_fan10_input.dev_attr.attr,
697 &sensor_dev_attr_fan11_input.dev_attr.attr,
698 &sensor_dev_attr_fan12_input.dev_attr.attr,
699 &sensor_dev_attr_fan13_input.dev_attr.attr,
700 &sensor_dev_attr_fan14_input.dev_attr.attr,
701 &sensor_dev_attr_fan15_input.dev_attr.attr,
5f348fa3 702 &sensor_dev_attr_fan16_input.dev_attr.attr,
2d7a548a
JRN		 703 NULL
704};
705
706static const struct attribute_group fan_dev_group = {
707 .attrs = fan_dev_attrs,
708 .is_visible = fan_dev_is_visible,
709};
710
711/*
712 * The clock type is type M :
713 * The PWM frequency = 24MHz / (type M clock division L bit *
714 * type M clock division H bit * (type M PWM period bit + 1))
715 */
716static void aspeed_create_type(struct aspeed_pwm_tacho_data *priv)
717{
718 priv->type_pwm_clock_division_h[TYPEM] = M_PWM_DIV_H;
719 priv->type_pwm_clock_division_l[TYPEM] = M_PWM_DIV_L;
720 priv->type_pwm_clock_unit[TYPEM] = M_PWM_PERIOD;
721 aspeed_set_pwm_clock_values(priv->regmap, TYPEM, M_PWM_DIV_H,
722 M_PWM_DIV_L, M_PWM_PERIOD);
723 aspeed_set_tacho_type_enable(priv->regmap, TYPEM, true);
724 priv->type_fan_tach_clock_division[TYPEM] = M_TACH_CLK_DIV;
725 priv->type_fan_tach_unit[TYPEM] = M_TACH_UNIT;
1e276292 726 priv->type_fan_tach_mode[TYPEM] = M_TACH_MODE;
2d7a548a
JRN		 727 aspeed_set_tacho_type_values(priv->regmap, TYPEM, M_TACH_MODE,
728 M_TACH_UNIT, M_TACH_CLK_DIV);
729}
730
731static void aspeed_create_pwm_port(struct aspeed_pwm_tacho_data *priv,
732 u8 pwm_port)
733{
734 aspeed_set_pwm_port_enable(priv->regmap, pwm_port, true);
735 priv->pwm_present[pwm_port] = true;
736
737 priv->pwm_port_type[pwm_port] = TYPEM;
738 aspeed_set_pwm_port_type(priv->regmap, pwm_port, TYPEM);
739
740 priv->pwm_port_fan_ctrl[pwm_port] = INIT_FAN_CTRL;
741 aspeed_set_pwm_port_fan_ctrl(priv, pwm_port, INIT_FAN_CTRL);
742}
743
744static void aspeed_create_fan_tach_channel(struct aspeed_pwm_tacho_data *priv,
745 u8 *fan_tach_ch,
746 int count,
747 u8 pwm_source)
748{
749 u8 val, index;
750
751 for (val = 0; val < count; val++) {
752 index = fan_tach_ch[val];
753 aspeed_set_fan_tach_ch_enable(priv->regmap, index, true);
754 priv->fan_tach_present[index] = true;
755 priv->fan_tach_ch_source[index] = pwm_source;
756 aspeed_set_fan_tach_ch_source(priv->regmap, index, pwm_source);
757 }
758}
759
f198907d
MK		 760static int
761aspeed_pwm_cz_get_max_state(struct thermal_cooling_device *tcdev,
762 unsigned long *state)
763{
764 struct aspeed_cooling_device *cdev = tcdev->devdata;
765
766 *state = cdev->max_state;
767
768 return 0;
769}
770
771static int
772aspeed_pwm_cz_get_cur_state(struct thermal_cooling_device *tcdev,
773 unsigned long *state)
774{
775 struct aspeed_cooling_device *cdev = tcdev->devdata;
776
777 *state = cdev->cur_state;
778
779 return 0;
780}
781
782static int
783aspeed_pwm_cz_set_cur_state(struct thermal_cooling_device *tcdev,
784 unsigned long state)
785{
786 struct aspeed_cooling_device *cdev = tcdev->devdata;
787
788 if (state > cdev->max_state)
789 return -EINVAL;
790
791 cdev->cur_state = state;
792 cdev->priv->pwm_port_fan_ctrl[cdev->pwm_port] =
793 cdev->cooling_levels[cdev->cur_state];
794 aspeed_set_pwm_port_fan_ctrl(cdev->priv, cdev->pwm_port,
795 cdev->cooling_levels[cdev->cur_state]);
796
797 return 0;
798}
799
800static const struct thermal_cooling_device_ops aspeed_pwm_cool_ops = {
801 .get_max_state = aspeed_pwm_cz_get_max_state,
802 .get_cur_state = aspeed_pwm_cz_get_cur_state,
803 .set_cur_state = aspeed_pwm_cz_set_cur_state,
804};
805
806static int aspeed_create_pwm_cooling(struct device *dev,
807 struct device_node *child,
808 struct aspeed_pwm_tacho_data *priv,
809 u32 pwm_port, u8 num_levels)
810{
811 int ret;
812 struct aspeed_cooling_device *cdev;
813
814 cdev = devm_kzalloc(dev, sizeof(*cdev), GFP_KERNEL);
815
816 if (!cdev)
817 return -ENOMEM;
818
819 cdev->cooling_levels = devm_kzalloc(dev, num_levels, GFP_KERNEL);
820 if (!cdev->cooling_levels)
821 return -ENOMEM;
822
823 cdev->max_state = num_levels - 1;
824 ret = of_property_read_u8_array(child, "cooling-levels",
825 cdev->cooling_levels,
826 num_levels);
827 if (ret) {
828 dev_err(dev, "Property 'cooling-levels' cannot be read.\n");
829 return ret;
830 }
0debe4d0 831 snprintf(cdev->name, MAX_CDEV_NAME_LEN, "%pOFn%d", child, pwm_port);
f198907d
MK		 832
833 cdev->tcdev = thermal_of_cooling_device_register(child,
834 cdev->name,
835 cdev,
836 &aspeed_pwm_cool_ops);
837 if (IS_ERR(cdev->tcdev))
838 return PTR_ERR(cdev->tcdev);
839
840 cdev->priv = priv;
841 cdev->pwm_port = pwm_port;
842
843 priv->cdev[pwm_port] = cdev;
844
845 return 0;
846}
847
2d7a548a
JRN		 848static int aspeed_create_fan(struct device *dev,
849 struct device_node *child,
850 struct aspeed_pwm_tacho_data *priv)
851{
852 u8 *fan_tach_ch;
853 u32 pwm_port;
854 int ret, count;
855
856 ret = of_property_read_u32(child, "reg", &pwm_port);
857 if (ret)
858 return ret;
859 aspeed_create_pwm_port(priv, (u8)pwm_port);
860
f198907d
MK		 861 ret = of_property_count_u8_elems(child, "cooling-levels");
862
863 if (ret > 0) {
864 ret = aspeed_create_pwm_cooling(dev, child, priv, pwm_port,
865 ret);
866 if (ret)
867 return ret;
868 }
869
2d7a548a
JRN		 870 count = of_property_count_u8_elems(child, "aspeed,fan-tach-ch");
871 if (count < 1)
872 return -EINVAL;
a86854d0 873 fan_tach_ch = devm_kcalloc(dev, count, sizeof(*fan_tach_ch),
2d7a548a
JRN		 874 GFP_KERNEL);
875 if (!fan_tach_ch)
876 return -ENOMEM;
877 ret = of_property_read_u8_array(child, "aspeed,fan-tach-ch",
878 fan_tach_ch, count);
879 if (ret)
880 return ret;
881 aspeed_create_fan_tach_channel(priv, fan_tach_ch, count, pwm_port);
882
883 return 0;
884}
885
18c514cc
J		 886static void aspeed_pwm_tacho_remove(void *data)
887{
888 struct aspeed_pwm_tacho_data *priv = data;
889
890 reset_control_assert(priv->rst);
891}
892
2d7a548a
JRN		 893static int aspeed_pwm_tacho_probe(struct platform_device *pdev)
894{
895 struct device *dev = &pdev->dev;
896 struct device_node *np, *child;
897 struct aspeed_pwm_tacho_data *priv;
898 void __iomem *regs;
899 struct resource *res;
900 struct device *hwmon;
901 struct clk *clk;
902 int ret;
903
904 np = dev->of_node;
905
906 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
907 if (!res)
908 return -ENOENT;
909 regs = devm_ioremap_resource(dev, res);
910 if (IS_ERR(regs))
911 return PTR_ERR(regs);
912 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
913 if (!priv)
914 return -ENOMEM;
915 priv->regmap = devm_regmap_init(dev, NULL, (__force void *)regs,
916 &aspeed_pwm_tacho_regmap_config);
917 if (IS_ERR(priv->regmap))
918 return PTR_ERR(priv->regmap);
18c514cc
J		 919
920 priv->rst = devm_reset_control_get_exclusive(dev, NULL);
921 if (IS_ERR(priv->rst)) {
922 dev_err(dev,
923 "missing or invalid reset controller device tree entry");
924 return PTR_ERR(priv->rst);
925 }
926 reset_control_deassert(priv->rst);
927
928 ret = devm_add_action_or_reset(dev, aspeed_pwm_tacho_remove, priv);
929 if (ret)
930 return ret;
931
2d7a548a
JRN		 932 regmap_write(priv->regmap, ASPEED_PTCR_TACH_SOURCE, 0);
933 regmap_write(priv->regmap, ASPEED_PTCR_TACH_SOURCE_EXT, 0);
934
935 clk = devm_clk_get(dev, NULL);
936 if (IS_ERR(clk))
937 return -ENODEV;
938 priv->clk_freq = clk_get_rate(clk);
939 aspeed_set_clock_enable(priv->regmap, true);
940 aspeed_set_clock_source(priv->regmap, 0);
941
942 aspeed_create_type(priv);
943
944 for_each_child_of_node(np, child) {
945 ret = aspeed_create_fan(dev, child, priv);
f198907d
MK		 946 if (ret) {
947 of_node_put(child);
2d7a548a 948 return ret;
f198907d 949 }
2d7a548a 950 }
2d7a548a
JRN		 951
952 priv->groups[0] = &pwm_dev_group;
953 priv->groups[1] = &fan_dev_group;
954 priv->groups[2] = NULL;
955 hwmon = devm_hwmon_device_register_with_groups(dev,
956 "aspeed_pwm_tacho",
957 priv, priv->groups);
958 return PTR_ERR_OR_ZERO(hwmon);
959}
960
961static const struct of_device_id of_pwm_tacho_match_table[] = {
962 { .compatible = "aspeed,ast2400-pwm-tacho", },
963 { .compatible = "aspeed,ast2500-pwm-tacho", },
964 {},
965};
966MODULE_DEVICE_TABLE(of, of_pwm_tacho_match_table);
967
968static struct platform_driver aspeed_pwm_tacho_driver = {
969 .probe = aspeed_pwm_tacho_probe,
970 .driver = {
971 .name = "aspeed_pwm_tacho",
972 .of_match_table = of_pwm_tacho_match_table,
973 },
974};
975
976module_platform_driver(aspeed_pwm_tacho_driver);
977
978MODULE_AUTHOR("Jaghathiswari Rankappagounder Natarajan <jaghu@google.com>");
979MODULE_DESCRIPTION("ASPEED PWM and Fan Tacho device driver");
980MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)