| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jaghathiswari Rankappagounder Natarajan | 3814 | 82.86% | 1 | 5.00% |
| Mykola Kostenok | 423 | 9.19% | 1 | 5.00% |
| Patrick Venture | 107 | 2.32% | 3 | 15.00% |
| Joel Stanley | 72 | 1.56% | 2 | 10.00% |
| Guenter Roeck | 54 | 1.17% | 2 | 10.00% |
| Gustavo A. R. Silva | 41 | 0.89% | 1 | 5.00% |
| Stefan Schaeckeler | 38 | 0.83% | 1 | 5.00% |
| Loic Prylli | 29 | 0.63% | 1 | 5.00% |
| Evgeny Novikov | 13 | 0.28% | 1 | 5.00% |
| Kees Cook | 3 | 0.07% | 1 | 5.00% |
| Rob Herring | 2 | 0.04% | 2 | 10.00% |
| SF Markus Elfring | 2 | 0.04% | 1 | 5.00% |
| Tian Tao | 2 | 0.04% | 1 | 5.00% |
| Thomas Gleixner | 2 | 0.04% | 1 | 5.00% |
| Paul Fertser | 1 | 0.02% | 1 | 5.00% |
| Total | 4603 | 20 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (c) 2016 Google, Inc */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/errno.h> #include <linux/gpio/consumer.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/reset.h> #include <linux/sysfs.h> #include <linux/thermal.h> /* ASPEED PWM & FAN Tach Register Definition */ #define ASPEED_PTCR_CTRL 0x00 #define ASPEED_PTCR_CLK_CTRL 0x04 #define ASPEED_PTCR_DUTY0_CTRL 0x08 #define ASPEED_PTCR_DUTY1_CTRL 0x0c #define ASPEED_PTCR_TYPEM_CTRL 0x10 #define ASPEED_PTCR_TYPEM_CTRL1 0x14 #define ASPEED_PTCR_TYPEN_CTRL 0x18 #define ASPEED_PTCR_TYPEN_CTRL1 0x1c #define ASPEED_PTCR_TACH_SOURCE 0x20 #define ASPEED_PTCR_TRIGGER 0x28 #define ASPEED_PTCR_RESULT 0x2c #define ASPEED_PTCR_INTR_CTRL 0x30 #define ASPEED_PTCR_INTR_STS 0x34 #define ASPEED_PTCR_TYPEM_LIMIT 0x38 #define ASPEED_PTCR_TYPEN_LIMIT 0x3C #define ASPEED_PTCR_CTRL_EXT 0x40 #define ASPEED_PTCR_CLK_CTRL_EXT 0x44 #define ASPEED_PTCR_DUTY2_CTRL 0x48 #define ASPEED_PTCR_DUTY3_CTRL 0x4c #define ASPEED_PTCR_TYPEO_CTRL 0x50 #define ASPEED_PTCR_TYPEO_CTRL1 0x54 #define ASPEED_PTCR_TACH_SOURCE_EXT 0x60 #define ASPEED_PTCR_TYPEO_LIMIT 0x78 /* ASPEED_PTCR_CTRL : 0x00 - General Control Register */ #define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART1 15 #define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART2 6 #define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_MASK (BIT(7) | BIT(15)) #define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART1 14 #define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART2 5 #define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_MASK (BIT(6) | BIT(14)) #define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART1 13 #define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART2 4 #define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_MASK (BIT(5) | BIT(13)) #define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART1 12 #define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART2 3 #define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_MASK (BIT(4) | BIT(12)) #define ASPEED_PTCR_CTRL_FAN_NUM_EN(x) BIT(16 + (x)) #define ASPEED_PTCR_CTRL_PWMD_EN BIT(11) #define ASPEED_PTCR_CTRL_PWMC_EN BIT(10) #define ASPEED_PTCR_CTRL_PWMB_EN BIT(9) #define ASPEED_PTCR_CTRL_PWMA_EN BIT(8) #define ASPEED_PTCR_CTRL_CLK_SRC BIT(1) #define ASPEED_PTCR_CTRL_CLK_EN BIT(0) /* ASPEED_PTCR_CLK_CTRL : 0x04 - Clock Control Register */ /* TYPE N */ #define ASPEED_PTCR_CLK_CTRL_TYPEN_MASK GENMASK(31, 16) #define ASPEED_PTCR_CLK_CTRL_TYPEN_UNIT 24 #define ASPEED_PTCR_CLK_CTRL_TYPEN_H 20 #define ASPEED_PTCR_CLK_CTRL_TYPEN_L 16 /* TYPE M */ #define ASPEED_PTCR_CLK_CTRL_TYPEM_MASK GENMASK(15, 0) #define ASPEED_PTCR_CLK_CTRL_TYPEM_UNIT 8 #define ASPEED_PTCR_CLK_CTRL_TYPEM_H 4 #define ASPEED_PTCR_CLK_CTRL_TYPEM_L 0 /* * ASPEED_PTCR_DUTY_CTRL/1/2/3 : 0x08/0x0C/0x48/0x4C - PWM-FAN duty control * 0/1/2/3 register */ #define DUTY_CTRL_PWM2_FALL_POINT 24 #define DUTY_CTRL_PWM2_RISE_POINT 16 #define DUTY_CTRL_PWM2_RISE_FALL_MASK GENMASK(31, 16) #define DUTY_CTRL_PWM1_FALL_POINT 8 #define DUTY_CTRL_PWM1_RISE_POINT 0 #define DUTY_CTRL_PWM1_RISE_FALL_MASK GENMASK(15, 0) /* ASPEED_PTCR_TYPEM_CTRL : 0x10/0x18/0x50 - Type M/N/O Ctrl 0 Register */ #define TYPE_CTRL_FAN_MASK (GENMASK(5, 1) | GENMASK(31, 16)) #define TYPE_CTRL_FAN1_MASK GENMASK(31, 0) #define TYPE_CTRL_FAN_PERIOD 16 #define TYPE_CTRL_FAN_MODE 4 #define TYPE_CTRL_FAN_DIVISION 1 #define TYPE_CTRL_FAN_TYPE_EN 1 /* ASPEED_PTCR_TACH_SOURCE : 0x20/0x60 - Tach Source Register */ /* bit [0,1] at 0x20, bit [2] at 0x60 */ #define TACH_PWM_SOURCE_BIT01(x) ((x) * 2) #define TACH_PWM_SOURCE_BIT2(x) ((x) * 2) #define TACH_PWM_SOURCE_MASK_BIT01(x) (0x3 << ((x) * 2)) #define TACH_PWM_SOURCE_MASK_BIT2(x) BIT((x) * 2) /* ASPEED_PTCR_RESULT : 0x2c - Result Register */ #define RESULT_STATUS_MASK BIT(31) #define RESULT_VALUE_MASK 0xfffff /* ASPEED_PTCR_CTRL_EXT : 0x40 - General Control Extension #1 Register */ #define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART1 15 #define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART2 6 #define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_MASK (BIT(7) | BIT(15)) #define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART1 14 #define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART2 5 #define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_MASK (BIT(6) | BIT(14)) #define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART1 13 #define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART2 4 #define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_MASK (BIT(5) | BIT(13)) #define ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART1 12 #define ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART2 3 #define ASPEED_PTCR_CTRL_SET_PWME_TYPE_MASK (BIT(4) | BIT(12)) #define ASPEED_PTCR_CTRL_PWMH_EN BIT(11) #define ASPEED_PTCR_CTRL_PWMG_EN BIT(10) #define ASPEED_PTCR_CTRL_PWMF_EN BIT(9) #define ASPEED_PTCR_CTRL_PWME_EN BIT(8) /* ASPEED_PTCR_CLK_EXT_CTRL : 0x44 - Clock Control Extension #1 Register */ /* TYPE O */ #define ASPEED_PTCR_CLK_CTRL_TYPEO_MASK GENMASK(15, 0) #define ASPEED_PTCR_CLK_CTRL_TYPEO_UNIT 8 #define ASPEED_PTCR_CLK_CTRL_TYPEO_H 4 #define ASPEED_PTCR_CLK_CTRL_TYPEO_L 0 #define PWM_MAX 255 #define BOTH_EDGES 0x02 /* 10b */ #define M_PWM_DIV_H 0x00 #define M_PWM_DIV_L 0x05 #define M_PWM_PERIOD 0x5F #define M_TACH_CLK_DIV 0x00 /* * 5:4 Type N fan tach mode selection bit: * 00: falling * 01: rising * 10: both * 11: reserved. */ #define M_TACH_MODE 0x02 /* 10b */ #define M_TACH_UNIT 0x0420 #define INIT_FAN_CTRL 0xFF /* How long we sleep in us while waiting for an RPM result. */ #define ASPEED_RPM_STATUS_SLEEP_USEC 500 #define MAX_CDEV_NAME_LEN 16 #define MAX_ASPEED_FAN_TACH_CHANNELS 16 struct aspeed_cooling_device { char name[16]; struct aspeed_pwm_tacho_data *priv; struct thermal_cooling_device *tcdev; int pwm_port; u8 *cooling_levels; u8 max_state; u8 cur_state; }; struct aspeed_pwm_tacho_data { struct regmap *regmap; struct reset_control *rst; unsigned long clk_freq; bool pwm_present[8]; bool fan_tach_present[MAX_ASPEED_FAN_TACH_CHANNELS]; u8 type_pwm_clock_unit[3]; u8 type_pwm_clock_division_h[3]; u8 type_pwm_clock_division_l[3]; u8 type_fan_tach_clock_division[3]; u8 type_fan_tach_mode[3]; u16 type_fan_tach_unit[3]; u8 pwm_port_type[8]; u8 pwm_port_fan_ctrl[8]; u8 fan_tach_ch_source[MAX_ASPEED_FAN_TACH_CHANNELS]; struct aspeed_cooling_device *cdev[8]; const struct attribute_group *groups[3]; /* protects access to shared ASPEED_PTCR_RESULT */ struct mutex tach_lock; }; enum type { TYPEM, TYPEN, TYPEO }; struct type_params { u32 l_value; u32 h_value; u32 unit_value; u32 clk_ctrl_mask; u32 clk_ctrl_reg; u32 ctrl_reg; u32 ctrl_reg1; }; static const struct type_params type_params[] = { [TYPEM] = { .l_value = ASPEED_PTCR_CLK_CTRL_TYPEM_L, .h_value = ASPEED_PTCR_CLK_CTRL_TYPEM_H, .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEM_UNIT, .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEM_MASK, .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL, .ctrl_reg = ASPEED_PTCR_TYPEM_CTRL, .ctrl_reg1 = ASPEED_PTCR_TYPEM_CTRL1, }, [TYPEN] = { .l_value = ASPEED_PTCR_CLK_CTRL_TYPEN_L, .h_value = ASPEED_PTCR_CLK_CTRL_TYPEN_H, .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEN_UNIT, .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEN_MASK, .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL, .ctrl_reg = ASPEED_PTCR_TYPEN_CTRL, .ctrl_reg1 = ASPEED_PTCR_TYPEN_CTRL1, }, [TYPEO] = { .l_value = ASPEED_PTCR_CLK_CTRL_TYPEO_L, .h_value = ASPEED_PTCR_CLK_CTRL_TYPEO_H, .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEO_UNIT, .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEO_MASK, .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL_EXT, .ctrl_reg = ASPEED_PTCR_TYPEO_CTRL, .ctrl_reg1 = ASPEED_PTCR_TYPEO_CTRL1, } }; enum pwm_port { PWMA, PWMB, PWMC, PWMD, PWME, PWMF, PWMG, PWMH }; struct pwm_port_params { u32 pwm_en; u32 ctrl_reg; u32 type_part1; u32 type_part2; u32 type_mask; u32 duty_ctrl_rise_point; u32 duty_ctrl_fall_point; u32 duty_ctrl_reg; u32 duty_ctrl_rise_fall_mask; }; static const struct pwm_port_params pwm_port_params[] = { [PWMA] = { .pwm_en = ASPEED_PTCR_CTRL_PWMA_EN, .ctrl_reg = ASPEED_PTCR_CTRL, .type_part1 = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART1, .type_part2 = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART2, .type_mask = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_MASK, .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT, .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT, .duty_ctrl_reg = ASPEED_PTCR_DUTY0_CTRL, .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK, }, [PWMB] = { .pwm_en = ASPEED_PTCR_CTRL_PWMB_EN, .ctrl_reg = ASPEED_PTCR_CTRL, .type_part1 = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART1, .type_part2 = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART2, .type_mask = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_MASK, .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT, .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT, .duty_ctrl_reg = ASPEED_PTCR_DUTY0_CTRL, .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK, }, [PWMC] = { .pwm_en = ASPEED_PTCR_CTRL_PWMC_EN, .ctrl_reg = ASPEED_PTCR_CTRL, .type_part1 = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART1, .type_part2 = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART2, .type_mask = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_MASK, .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT, .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT, .duty_ctrl_reg = ASPEED_PTCR_DUTY1_CTRL, .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK, }, [PWMD] = { .pwm_en = ASPEED_PTCR_CTRL_PWMD_EN, .ctrl_reg = ASPEED_PTCR_CTRL, .type_part1 = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART1, .type_part2 = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART2, .type_mask = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_MASK, .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT, .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT, .duty_ctrl_reg = ASPEED_PTCR_DUTY1_CTRL, .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK, }, [PWME] = { .pwm_en = ASPEED_PTCR_CTRL_PWME_EN, .ctrl_reg = ASPEED_PTCR_CTRL_EXT, .type_part1 = ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART1, .type_part2 = ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART2, .type_mask = ASPEED_PTCR_CTRL_SET_PWME_TYPE_MASK, .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT, .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT, .duty_ctrl_reg = ASPEED_PTCR_DUTY2_CTRL, .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK, }, [PWMF] = { .pwm_en = ASPEED_PTCR_CTRL_PWMF_EN, .ctrl_reg = ASPEED_PTCR_CTRL_EXT, .type_part1 = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART1, .type_part2 = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART2, .type_mask = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_MASK, .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT, .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT, .duty_ctrl_reg = ASPEED_PTCR_DUTY2_CTRL, .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK, }, [PWMG] = { .pwm_en = ASPEED_PTCR_CTRL_PWMG_EN, .ctrl_reg = ASPEED_PTCR_CTRL_EXT, .type_part1 = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART1, .type_part2 = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART2, .type_mask = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_MASK, .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT, .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT, .duty_ctrl_reg = ASPEED_PTCR_DUTY3_CTRL, .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK, }, [PWMH] = { .pwm_en = ASPEED_PTCR_CTRL_PWMH_EN, .ctrl_reg = ASPEED_PTCR_CTRL_EXT, .type_part1 = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART1, .type_part2 = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART2, .type_mask = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_MASK, .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT, .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT, .duty_ctrl_reg = ASPEED_PTCR_DUTY3_CTRL, .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK, } }; static int regmap_aspeed_pwm_tacho_reg_write(void *context, unsigned int reg, unsigned int val) { void __iomem *regs = (void __iomem *)context; writel(val, regs + reg); return 0; } static int regmap_aspeed_pwm_tacho_reg_read(void *context, unsigned int reg, unsigned int *val) { void __iomem *regs = (void __iomem *)context; *val = readl(regs + reg); return 0; } static const struct regmap_config aspeed_pwm_tacho_regmap_config = { .reg_bits = 32, .val_bits = 32, .reg_stride = 4, .max_register = ASPEED_PTCR_TYPEO_LIMIT, .reg_write = regmap_aspeed_pwm_tacho_reg_write, .reg_read = regmap_aspeed_pwm_tacho_reg_read, .fast_io = true, }; static void aspeed_set_clock_enable(struct regmap *regmap, bool val) { regmap_update_bits(regmap, ASPEED_PTCR_CTRL, ASPEED_PTCR_CTRL_CLK_EN, val ? ASPEED_PTCR_CTRL_CLK_EN : 0); } static void aspeed_set_clock_source(struct regmap *regmap, int val) { regmap_update_bits(regmap, ASPEED_PTCR_CTRL, ASPEED_PTCR_CTRL_CLK_SRC, val ? ASPEED_PTCR_CTRL_CLK_SRC : 0); } static void aspeed_set_pwm_clock_values(struct regmap *regmap, u8 type, u8 div_high, u8 div_low, u8 unit) { u32 reg_value = ((div_high << type_params[type].h_value) | (div_low << type_params[type].l_value) | (unit << type_params[type].unit_value)); regmap_update_bits(regmap, type_params[type].clk_ctrl_reg, type_params[type].clk_ctrl_mask, reg_value); } static void aspeed_set_pwm_port_enable(struct regmap *regmap, u8 pwm_port, bool enable) { regmap_update_bits(regmap, pwm_port_params[pwm_port].ctrl_reg, pwm_port_params[pwm_port].pwm_en, enable ? pwm_port_params[pwm_port].pwm_en : 0); } static void aspeed_set_pwm_port_type(struct regmap *regmap, u8 pwm_port, u8 type) { u32 reg_value = (type & 0x1) << pwm_port_params[pwm_port].type_part1; reg_value |= (type & 0x2) << pwm_port_params[pwm_port].type_part2; regmap_update_bits(regmap, pwm_port_params[pwm_port].ctrl_reg, pwm_port_params[pwm_port].type_mask, reg_value); } static void aspeed_set_pwm_port_duty_rising_falling(struct regmap *regmap, u8 pwm_port, u8 rising, u8 falling) { u32 reg_value = (rising << pwm_port_params[pwm_port].duty_ctrl_rise_point); reg_value |= (falling << pwm_port_params[pwm_port].duty_ctrl_fall_point); regmap_update_bits(regmap, pwm_port_params[pwm_port].duty_ctrl_reg, pwm_port_params[pwm_port].duty_ctrl_rise_fall_mask, reg_value); } static void aspeed_set_tacho_type_enable(struct regmap *regmap, u8 type, bool enable) { regmap_update_bits(regmap, type_params[type].ctrl_reg, TYPE_CTRL_FAN_TYPE_EN, enable ? TYPE_CTRL_FAN_TYPE_EN : 0); } static void aspeed_set_tacho_type_values(struct regmap *regmap, u8 type, u8 mode, u16 unit, u8 division) { u32 reg_value = ((mode << TYPE_CTRL_FAN_MODE) | (unit << TYPE_CTRL_FAN_PERIOD) | (division << TYPE_CTRL_FAN_DIVISION)); regmap_update_bits(regmap, type_params[type].ctrl_reg, TYPE_CTRL_FAN_MASK, reg_value); regmap_update_bits(regmap, type_params[type].ctrl_reg1, TYPE_CTRL_FAN1_MASK, unit << 16); } static void aspeed_set_fan_tach_ch_enable(struct regmap *regmap, u8 fan_tach_ch, bool enable) { regmap_update_bits(regmap, ASPEED_PTCR_CTRL, ASPEED_PTCR_CTRL_FAN_NUM_EN(fan_tach_ch), enable ? ASPEED_PTCR_CTRL_FAN_NUM_EN(fan_tach_ch) : 0); } static void aspeed_set_fan_tach_ch_source(struct regmap *regmap, u8 fan_tach_ch, u8 fan_tach_ch_source) { u32 reg_value1 = ((fan_tach_ch_source & 0x3) << TACH_PWM_SOURCE_BIT01(fan_tach_ch)); u32 reg_value2 = (((fan_tach_ch_source & 0x4) >> 2) << TACH_PWM_SOURCE_BIT2(fan_tach_ch)); regmap_update_bits(regmap, ASPEED_PTCR_TACH_SOURCE, TACH_PWM_SOURCE_MASK_BIT01(fan_tach_ch), reg_value1); regmap_update_bits(regmap, ASPEED_PTCR_TACH_SOURCE_EXT, TACH_PWM_SOURCE_MASK_BIT2(fan_tach_ch), reg_value2); } static void aspeed_set_pwm_port_fan_ctrl(struct aspeed_pwm_tacho_data *priv, u8 index, u8 fan_ctrl) { u16 period, dc_time_on; period = priv->type_pwm_clock_unit[priv->pwm_port_type[index]]; period += 1; dc_time_on = (fan_ctrl * period) / PWM_MAX; if (dc_time_on == 0) { aspeed_set_pwm_port_enable(priv->regmap, index, false); } else { if (dc_time_on == period) dc_time_on = 0; aspeed_set_pwm_port_duty_rising_falling(priv->regmap, index, 0, dc_time_on); aspeed_set_pwm_port_enable(priv->regmap, index, true); } } static u32 aspeed_get_fan_tach_ch_measure_period(struct aspeed_pwm_tacho_data *priv, u8 type) { u32 clk; u16 tacho_unit; u8 clk_unit, div_h, div_l, tacho_div; clk = priv->clk_freq; clk_unit = priv->type_pwm_clock_unit[type]; div_h = priv->type_pwm_clock_division_h[type]; div_h = 0x1 << div_h; div_l = priv->type_pwm_clock_division_l[type]; if (div_l == 0) div_l = 1; else div_l = div_l * 2; tacho_unit = priv->type_fan_tach_unit[type]; tacho_div = priv->type_fan_tach_clock_division[type]; tacho_div = 0x4 << (tacho_div * 2); return clk / (clk_unit * div_h * div_l * tacho_div * tacho_unit); } static int aspeed_get_fan_tach_ch_rpm(struct aspeed_pwm_tacho_data *priv, u8 fan_tach_ch) { u32 raw_data, tach_div, clk_source, msec, usec, val; u8 fan_tach_ch_source, type, mode, both; int ret; mutex_lock(&priv->tach_lock); regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0); regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0x1 << fan_tach_ch); fan_tach_ch_source = priv->fan_tach_ch_source[fan_tach_ch]; type = priv->pwm_port_type[fan_tach_ch_source]; msec = (1000 / aspeed_get_fan_tach_ch_measure_period(priv, type)); usec = msec * 1000; ret = regmap_read_poll_timeout( priv->regmap, ASPEED_PTCR_RESULT, val, (val & RESULT_STATUS_MASK), ASPEED_RPM_STATUS_SLEEP_USEC, usec); mutex_unlock(&priv->tach_lock); /* return -ETIMEDOUT if we didn't get an answer. */ if (ret) return ret; raw_data = val & RESULT_VALUE_MASK; tach_div = priv->type_fan_tach_clock_division[type]; /* * We need the mode to determine if the raw_data is double (from * counting both edges). */ mode = priv->type_fan_tach_mode[type]; both = (mode & BOTH_EDGES) ? 1 : 0; tach_div = (0x4 << both) << (tach_div * 2); clk_source = priv->clk_freq; if (raw_data == 0) return 0; return (clk_source * 60) / (2 * raw_data * tach_div); } static ssize_t pwm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); int index = sensor_attr->index; int ret; struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev); long fan_ctrl; ret = kstrtol(buf, 10, &fan_ctrl); if (ret != 0) return ret; if (fan_ctrl < 0 || fan_ctrl > PWM_MAX) return -EINVAL; if (priv->pwm_port_fan_ctrl[index] == fan_ctrl) return count; priv->pwm_port_fan_ctrl[index] = fan_ctrl; aspeed_set_pwm_port_fan_ctrl(priv, index, fan_ctrl); return count; } static ssize_t pwm_show(struct device *dev, struct device_attribute *attr, char *buf) { struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); int index = sensor_attr->index; struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev); return sprintf(buf, "%u\n", priv->pwm_port_fan_ctrl[index]); } static ssize_t rpm_show(struct device *dev, struct device_attribute *attr, char *buf) { struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); int index = sensor_attr->index; int rpm; struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev); rpm = aspeed_get_fan_tach_ch_rpm(priv, index); if (rpm < 0) return rpm; return sprintf(buf, "%d\n", rpm); } static umode_t pwm_is_visible(struct kobject *kobj, struct attribute *a, int index) { struct device *dev = kobj_to_dev(kobj); struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev); if (!priv->pwm_present[index]) return 0; return a->mode; } static umode_t fan_dev_is_visible(struct kobject *kobj, struct attribute *a, int index) { struct device *dev = kobj_to_dev(kobj); struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev); if (!priv->fan_tach_present[index]) return 0; return a->mode; } static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0); static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1); static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2); static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3); static SENSOR_DEVICE_ATTR_RW(pwm5, pwm, 4); static SENSOR_DEVICE_ATTR_RW(pwm6, pwm, 5); static SENSOR_DEVICE_ATTR_RW(pwm7, pwm, 6); static SENSOR_DEVICE_ATTR_RW(pwm8, pwm, 7); static struct attribute *pwm_dev_attrs[] = { &sensor_dev_attr_pwm1.dev_attr.attr, &sensor_dev_attr_pwm2.dev_attr.attr, &sensor_dev_attr_pwm3.dev_attr.attr, &sensor_dev_attr_pwm4.dev_attr.attr, &sensor_dev_attr_pwm5.dev_attr.attr, &sensor_dev_attr_pwm6.dev_attr.attr, &sensor_dev_attr_pwm7.dev_attr.attr, &sensor_dev_attr_pwm8.dev_attr.attr, NULL, }; static const struct attribute_group pwm_dev_group = { .attrs = pwm_dev_attrs, .is_visible = pwm_is_visible, }; static SENSOR_DEVICE_ATTR_RO(fan1_input, rpm, 0); static SENSOR_DEVICE_ATTR_RO(fan2_input, rpm, 1); static SENSOR_DEVICE_ATTR_RO(fan3_input, rpm, 2); static SENSOR_DEVICE_ATTR_RO(fan4_input, rpm, 3); static SENSOR_DEVICE_ATTR_RO(fan5_input, rpm, 4); static SENSOR_DEVICE_ATTR_RO(fan6_input, rpm, 5); static SENSOR_DEVICE_ATTR_RO(fan7_input, rpm, 6); static SENSOR_DEVICE_ATTR_RO(fan8_input, rpm, 7); static SENSOR_DEVICE_ATTR_RO(fan9_input, rpm, 8); static SENSOR_DEVICE_ATTR_RO(fan10_input, rpm, 9); static SENSOR_DEVICE_ATTR_RO(fan11_input, rpm, 10); static SENSOR_DEVICE_ATTR_RO(fan12_input, rpm, 11); static SENSOR_DEVICE_ATTR_RO(fan13_input, rpm, 12); static SENSOR_DEVICE_ATTR_RO(fan14_input, rpm, 13); static SENSOR_DEVICE_ATTR_RO(fan15_input, rpm, 14); static SENSOR_DEVICE_ATTR_RO(fan16_input, rpm, 15); static struct attribute *fan_dev_attrs[] = { &sensor_dev_attr_fan1_input.dev_attr.attr, &sensor_dev_attr_fan2_input.dev_attr.attr, &sensor_dev_attr_fan3_input.dev_attr.attr, &sensor_dev_attr_fan4_input.dev_attr.attr, &sensor_dev_attr_fan5_input.dev_attr.attr, &sensor_dev_attr_fan6_input.dev_attr.attr, &sensor_dev_attr_fan7_input.dev_attr.attr, &sensor_dev_attr_fan8_input.dev_attr.attr, &sensor_dev_attr_fan9_input.dev_attr.attr, &sensor_dev_attr_fan10_input.dev_attr.attr, &sensor_dev_attr_fan11_input.dev_attr.attr, &sensor_dev_attr_fan12_input.dev_attr.attr, &sensor_dev_attr_fan13_input.dev_attr.attr, &sensor_dev_attr_fan14_input.dev_attr.attr, &sensor_dev_attr_fan15_input.dev_attr.attr, &sensor_dev_attr_fan16_input.dev_attr.attr, NULL }; static const struct attribute_group fan_dev_group = { .attrs = fan_dev_attrs, .is_visible = fan_dev_is_visible, }; /* * The clock type is type M : * The PWM frequency = 24MHz / (type M clock division L bit * * type M clock division H bit * (type M PWM period bit + 1)) */ static void aspeed_create_type(struct aspeed_pwm_tacho_data *priv) { priv->type_pwm_clock_division_h[TYPEM] = M_PWM_DIV_H; priv->type_pwm_clock_division_l[TYPEM] = M_PWM_DIV_L; priv->type_pwm_clock_unit[TYPEM] = M_PWM_PERIOD; aspeed_set_pwm_clock_values(priv->regmap, TYPEM, M_PWM_DIV_H, M_PWM_DIV_L, M_PWM_PERIOD); aspeed_set_tacho_type_enable(priv->regmap, TYPEM, true); priv->type_fan_tach_clock_division[TYPEM] = M_TACH_CLK_DIV; priv->type_fan_tach_unit[TYPEM] = M_TACH_UNIT; priv->type_fan_tach_mode[TYPEM] = M_TACH_MODE; aspeed_set_tacho_type_values(priv->regmap, TYPEM, M_TACH_MODE, M_TACH_UNIT, M_TACH_CLK_DIV); } static void aspeed_create_pwm_port(struct aspeed_pwm_tacho_data *priv, u8 pwm_port) { aspeed_set_pwm_port_enable(priv->regmap, pwm_port, true); priv->pwm_present[pwm_port] = true; priv->pwm_port_type[pwm_port] = TYPEM; aspeed_set_pwm_port_type(priv->regmap, pwm_port, TYPEM); priv->pwm_port_fan_ctrl[pwm_port] = INIT_FAN_CTRL; aspeed_set_pwm_port_fan_ctrl(priv, pwm_port, INIT_FAN_CTRL); } static int aspeed_create_fan_tach_channel(struct device *dev, struct aspeed_pwm_tacho_data *priv, u8 *fan_tach_ch, int count, u8 pwm_source) { u8 val, index; for (val = 0; val < count; val++) { index = fan_tach_ch[val]; if (index >= MAX_ASPEED_FAN_TACH_CHANNELS) { dev_err(dev, "Invalid Fan Tach input channel %u\n.", index); return -EINVAL; } aspeed_set_fan_tach_ch_enable(priv->regmap, index, true); priv->fan_tach_present[index] = true; priv->fan_tach_ch_source[index] = pwm_source; aspeed_set_fan_tach_ch_source(priv->regmap, index, pwm_source); } return 0; } static int aspeed_pwm_cz_get_max_state(struct thermal_cooling_device *tcdev, unsigned long *state) { struct aspeed_cooling_device *cdev = tcdev->devdata; *state = cdev->max_state; return 0; } static int aspeed_pwm_cz_get_cur_state(struct thermal_cooling_device *tcdev, unsigned long *state) { struct aspeed_cooling_device *cdev = tcdev->devdata; *state = cdev->cur_state; return 0; } static int aspeed_pwm_cz_set_cur_state(struct thermal_cooling_device *tcdev, unsigned long state) { struct aspeed_cooling_device *cdev = tcdev->devdata; if (state > cdev->max_state) return -EINVAL; cdev->cur_state = state; cdev->priv->pwm_port_fan_ctrl[cdev->pwm_port] = cdev->cooling_levels[cdev->cur_state]; aspeed_set_pwm_port_fan_ctrl(cdev->priv, cdev->pwm_port, cdev->cooling_levels[cdev->cur_state]); return 0; } static const struct thermal_cooling_device_ops aspeed_pwm_cool_ops = { .get_max_state = aspeed_pwm_cz_get_max_state, .get_cur_state = aspeed_pwm_cz_get_cur_state, .set_cur_state = aspeed_pwm_cz_set_cur_state, }; static int aspeed_create_pwm_cooling(struct device *dev, struct device_node *child, struct aspeed_pwm_tacho_data *priv, u32 pwm_port, u8 num_levels) { int ret; struct aspeed_cooling_device *cdev; cdev = devm_kzalloc(dev, sizeof(*cdev), GFP_KERNEL); if (!cdev) return -ENOMEM; cdev->cooling_levels = devm_kzalloc(dev, num_levels, GFP_KERNEL); if (!cdev->cooling_levels) return -ENOMEM; cdev->max_state = num_levels - 1; ret = of_property_read_u8_array(child, "cooling-levels", cdev->cooling_levels, num_levels); if (ret) { dev_err(dev, "Property 'cooling-levels' cannot be read.\n"); return ret; } snprintf(cdev->name, MAX_CDEV_NAME_LEN, "%pOFn%d", child, pwm_port); cdev->tcdev = devm_thermal_of_cooling_device_register(dev, child, cdev->name, cdev, &aspeed_pwm_cool_ops); if (IS_ERR(cdev->tcdev)) return PTR_ERR(cdev->tcdev); cdev->priv = priv; cdev->pwm_port = pwm_port; priv->cdev[pwm_port] = cdev; return 0; } static int aspeed_create_fan(struct device *dev, struct device_node *child, struct aspeed_pwm_tacho_data *priv) { u8 *fan_tach_ch; u32 pwm_port; int ret, count; ret = of_property_read_u32(child, "reg", &pwm_port); if (ret) return ret; if (pwm_port >= ARRAY_SIZE(pwm_port_params)) return -EINVAL; aspeed_create_pwm_port(priv, (u8)pwm_port); ret = of_property_count_u8_elems(child, "cooling-levels"); if (ret > 0) { ret = aspeed_create_pwm_cooling(dev, child, priv, pwm_port, ret); if (ret) return ret; } count = of_property_count_u8_elems(child, "aspeed,fan-tach-ch"); if (count < 1) return -EINVAL; fan_tach_ch = devm_kcalloc(dev, count, sizeof(*fan_tach_ch), GFP_KERNEL); if (!fan_tach_ch) return -ENOMEM; ret = of_property_read_u8_array(child, "aspeed,fan-tach-ch", fan_tach_ch, count); if (ret) return ret; ret = aspeed_create_fan_tach_channel(dev, priv, fan_tach_ch, count, pwm_port); if (ret) return ret; return 0; } static void aspeed_pwm_tacho_remove(void *data) { struct aspeed_pwm_tacho_data *priv = data; reset_control_assert(priv->rst); } static int aspeed_pwm_tacho_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct device_node *np, *child; struct aspeed_pwm_tacho_data *priv; void __iomem *regs; struct device *hwmon; struct clk *clk; int ret; np = dev->of_node; regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(regs)) return PTR_ERR(regs); priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; mutex_init(&priv->tach_lock); priv->regmap = devm_regmap_init(dev, NULL, (__force void *)regs, &aspeed_pwm_tacho_regmap_config); if (IS_ERR(priv->regmap)) return PTR_ERR(priv->regmap); priv->rst = devm_reset_control_get_exclusive(dev, NULL); if (IS_ERR(priv->rst)) { dev_err(dev, "missing or invalid reset controller device tree entry"); return PTR_ERR(priv->rst); } reset_control_deassert(priv->rst); ret = devm_add_action_or_reset(dev, aspeed_pwm_tacho_remove, priv); if (ret) return ret; regmap_write(priv->regmap, ASPEED_PTCR_TACH_SOURCE, 0); regmap_write(priv->regmap, ASPEED_PTCR_TACH_SOURCE_EXT, 0); clk = devm_clk_get(dev, NULL); if (IS_ERR(clk)) return -ENODEV; priv->clk_freq = clk_get_rate(clk); aspeed_set_clock_enable(priv->regmap, true); aspeed_set_clock_source(priv->regmap, 0); aspeed_create_type(priv); for_each_child_of_node(np, child) { ret = aspeed_create_fan(dev, child, priv); if (ret) { of_node_put(child); return ret; } } priv->groups[0] = &pwm_dev_group; priv->groups[1] = &fan_dev_group; priv->groups[2] = NULL; hwmon = devm_hwmon_device_register_with_groups(dev, "aspeed_pwm_tacho", priv, priv->groups); return PTR_ERR_OR_ZERO(hwmon); } static const struct of_device_id of_pwm_tacho_match_table[] = { { .compatible = "aspeed,ast2400-pwm-tacho", }, { .compatible = "aspeed,ast2500-pwm-tacho", }, {}, }; MODULE_DEVICE_TABLE(of, of_pwm_tacho_match_table); static struct platform_driver aspeed_pwm_tacho_driver = { .probe = aspeed_pwm_tacho_probe, .driver = { .name = "aspeed_pwm_tacho", .of_match_table = of_pwm_tacho_match_table, }, }; module_platform_driver(aspeed_pwm_tacho_driver); MODULE_AUTHOR("Jaghathiswari Rankappagounder Natarajan <jaghu@google.com>"); MODULE_DESCRIPTION("ASPEED PWM and Fan Tacho device driver"); MODULE_LICENSE("GPL");
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