summaryrefslogtreecommitdiffstats
path: root/drivers/hwmon/nct6775.h
diff options
context:
space:
mode:
authorKees Cook <kees+treewide@kernel.org>2026-09-02 15:31:14 -0700
committerKees Cook <kees@kernel.org>2026-09-04 21:37:00 -0700
commit3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d (patch)
treec65086f9bdcd48c6360fb7cb4598bca084da1f32 /drivers/hwmon/nct6775.h
downloadlinux-stable-3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d.tar.gz
linux-stable-3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d.zip
treewide: refresh kmalloc_obj() conversionsgrafted
This is another run of the Coccinelle script for converting kmalloc() family of allocations to kmalloc_obj() via the existing rules in scripts/coccinelle/api/kmalloc_objs.cocci This catches both the set of kmalloc() uses added since the first kmalloc_obj() conversions in v7.0 and adds a large group missed in the first pass due to Coccinelle not interacting well with the cleanup.h scoped_...() family of macros[1]. I worked around this with spatch's "--macro-file" argument to a file with all the scoped_...() macros mapped to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control flow indicator I could find. Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc, riscv, and s390 with no new warnings. Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1] Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2] Signed-off-by: Kees Cook <kees+treewide@kernel.org>
Diffstat (limited to 'drivers/hwmon/nct6775.h')
-rw-r--r--drivers/hwmon/nct6775.h271
1 files changed, 271 insertions, 0 deletions
diff --git a/drivers/hwmon/nct6775.h b/drivers/hwmon/nct6775.h
new file mode 100644
index 000000000..296eff99d
--- /dev/null
+++ b/drivers/hwmon/nct6775.h
@@ -0,0 +1,271 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __HWMON_NCT6775_H__
+#define __HWMON_NCT6775_H__
+
+#include <linux/types.h>
+
+enum kinds { nct6106, nct6116, nct6775, nct6776, nct6779, nct6791, nct6792,
+ nct6793, nct6795, nct6796, nct6797, nct6798, nct6799 };
+enum pwm_enable { off, manual, thermal_cruise, speed_cruise, sf3, sf4 };
+
+#define NUM_TEMP 12 /* Max number of temp attribute sets w/ limits*/
+#define NUM_TEMP_FIXED 6 /* Max number of fixed temp attribute sets */
+#define NUM_TSI_TEMP 8 /* Max number of TSI temp register pairs */
+
+#define NUM_REG_ALARM 7 /* Max number of alarm registers */
+#define NUM_REG_BEEP 5 /* Max number of beep registers */
+
+#define NUM_FAN 7
+#define NUM_IN 18
+
+struct nct6775_data {
+ int addr; /* IO base of hw monitor block */
+ int sioreg; /* SIO register address */
+ enum kinds kind;
+ const char *name;
+
+ const struct attribute_group *groups[7];
+ u8 num_groups;
+
+ u16 reg_temp[5][NUM_TEMP]; /* 0=temp, 1=temp_over, 2=temp_hyst,
+ * 3=temp_crit, 4=temp_lcrit
+ */
+ u8 temp_src[NUM_TEMP];
+ u16 reg_temp_config[NUM_TEMP];
+ const char * const *temp_label;
+ u32 temp_mask;
+ u32 virt_temp_mask;
+
+ u16 REG_CONFIG;
+ u16 REG_VBAT;
+ u16 REG_DIODE;
+ u8 DIODE_MASK;
+
+ const s8 *ALARM_BITS;
+ const s8 *BEEP_BITS;
+
+ const u16 *REG_VIN;
+ const u16 *REG_IN_MINMAX[2];
+
+ const u16 *REG_TARGET;
+ const u16 *REG_FAN;
+ const u16 *REG_FAN_MODE;
+ const u16 *REG_FAN_MIN;
+ const u16 *REG_FAN_PULSES;
+ const u16 *FAN_PULSE_SHIFT;
+ const u16 *REG_FAN_TIME[3];
+
+ const u16 *REG_TOLERANCE_H;
+
+ const u8 *REG_PWM_MODE;
+ const u8 *PWM_MODE_MASK;
+
+ const u16 *REG_PWM[7]; /* [0]=pwm, [1]=pwm_start, [2]=pwm_floor,
+ * [3]=pwm_max, [4]=pwm_step,
+ * [5]=weight_duty_step, [6]=weight_duty_base
+ */
+ const u16 *REG_PWM_READ;
+
+ const u16 *REG_CRITICAL_PWM_ENABLE;
+ u8 CRITICAL_PWM_ENABLE_MASK;
+ const u16 *REG_CRITICAL_PWM;
+
+ const u16 *REG_AUTO_TEMP;
+ const u16 *REG_AUTO_PWM;
+
+ const u16 *REG_CRITICAL_TEMP;
+ const u16 *REG_CRITICAL_TEMP_TOLERANCE;
+
+ const u16 *REG_TEMP_SOURCE; /* temp register sources */
+ const u16 *REG_TEMP_SEL;
+ const u16 *REG_WEIGHT_TEMP_SEL;
+ const u16 *REG_WEIGHT_TEMP[3]; /* 0=base, 1=tolerance, 2=step */
+
+ const u16 *REG_TEMP_OFFSET;
+
+ const u16 *REG_ALARM;
+ const u16 *REG_BEEP;
+
+ const u16 *REG_TSI_TEMP;
+
+ unsigned int (*fan_from_reg)(u16 reg, unsigned int divreg);
+ unsigned int (*fan_from_reg_min)(u16 reg, unsigned int divreg);
+
+ struct mutex update_lock;
+ bool valid; /* true if following fields are valid */
+ unsigned long last_updated; /* In jiffies */
+
+ /* Register values */
+ u8 bank; /* current register bank */
+ u8 in_num; /* number of in inputs we have */
+ u8 in[NUM_IN][3]; /* [0]=in, [1]=in_max, [2]=in_min */
+ const u16 *scale_in; /* internal scaling factors */
+ unsigned int rpm[NUM_FAN];
+ u16 fan_min[NUM_FAN];
+ u8 fan_pulses[NUM_FAN];
+ u8 fan_div[NUM_FAN];
+ u8 has_pwm;
+ u8 has_fan; /* some fan inputs can be disabled */
+ u8 has_fan_min; /* some fans don't have min register */
+ bool has_fan_div;
+
+ u8 num_temp_alarms; /* 2, 3, or 6 */
+ u8 num_temp_beeps; /* 2, 3, or 6 */
+ u8 temp_fixed_num; /* 3 or 6 */
+ u8 temp_type[NUM_TEMP_FIXED];
+ s8 temp_offset[NUM_TEMP_FIXED];
+ s16 temp[5][NUM_TEMP]; /* 0=temp, 1=temp_over, 2=temp_hyst,
+ * 3=temp_crit, 4=temp_lcrit
+ */
+ s16 tsi_temp[NUM_TSI_TEMP];
+ u64 alarms;
+ u64 beeps;
+
+ u8 pwm_num; /* number of pwm */
+ u8 pwm_mode[NUM_FAN]; /* 0->DC variable voltage,
+ * 1->PWM variable duty cycle
+ */
+ enum pwm_enable pwm_enable[NUM_FAN];
+ /* 0->off
+ * 1->manual
+ * 2->thermal cruise mode (also called SmartFan I)
+ * 3->fan speed cruise mode
+ * 4->SmartFan III
+ * 5->enhanced variable thermal cruise (SmartFan IV)
+ */
+ u8 pwm[7][NUM_FAN]; /* [0]=pwm, [1]=pwm_start, [2]=pwm_floor,
+ * [3]=pwm_max, [4]=pwm_step,
+ * [5]=weight_duty_step, [6]=weight_duty_base
+ */
+
+ u8 target_temp[NUM_FAN];
+ u8 target_temp_mask;
+ u32 target_speed[NUM_FAN];
+ u32 target_speed_tolerance[NUM_FAN];
+ u8 speed_tolerance_limit;
+
+ u8 temp_tolerance[2][NUM_FAN];
+ u8 tolerance_mask;
+
+ u8 fan_time[3][NUM_FAN]; /* 0 = stop_time, 1 = step_up, 2 = step_down */
+
+ /* Automatic fan speed control registers */
+ int auto_pwm_num;
+ u8 auto_pwm[NUM_FAN][7];
+ u8 auto_temp[NUM_FAN][7];
+ u8 pwm_temp_sel[NUM_FAN];
+ u8 pwm_weight_temp_sel[NUM_FAN];
+ u8 weight_temp[3][NUM_FAN]; /* 0->temp_step, 1->temp_step_tol,
+ * 2->temp_base
+ */
+
+ u8 vid;
+ u8 vrm;
+
+ bool have_vid;
+
+ u16 have_temp;
+ u16 have_temp_fixed;
+ u16 have_tsi_temp;
+ u32 have_in;
+
+ /* Remember extra register values over suspend/resume */
+ u8 vbat;
+ u8 fandiv1;
+ u8 fandiv2;
+ u8 sio_reg_enable;
+
+ struct regmap *regmap;
+ bool read_only;
+
+ /* driver-specific (platform, i2c) initialization hook and data */
+ int (*driver_init)(struct nct6775_data *data);
+ void *driver_data;
+};
+
+static inline int nct6775_read_value(struct nct6775_data *data, u16 reg, u16 *value)
+{
+ unsigned int tmp;
+ int ret = regmap_read(data->regmap, reg, &tmp);
+
+ if (!ret)
+ *value = tmp;
+ return ret;
+}
+
+static inline int nct6775_write_value(struct nct6775_data *data, u16 reg, u16 value)
+{
+ return regmap_write(data->regmap, reg, value);
+}
+
+struct nct6775_data *nct6775_update_device(struct device *dev);
+
+bool nct6775_reg_is_word_sized(struct nct6775_data *data, u16 reg);
+int nct6775_probe(struct device *dev, struct nct6775_data *data,
+ const struct regmap_config *regmapcfg);
+
+ssize_t nct6775_show_alarm(struct device *dev, struct device_attribute *attr, char *buf);
+ssize_t nct6775_show_beep(struct device *dev, struct device_attribute *attr, char *buf);
+ssize_t nct6775_store_beep(struct device *dev, struct device_attribute *attr, const char *buf,
+ size_t count);
+
+static inline int nct6775_write_temp(struct nct6775_data *data, u16 reg, u16 value)
+{
+ if (!nct6775_reg_is_word_sized(data, reg))
+ value >>= 8;
+ return nct6775_write_value(data, reg, value);
+}
+
+static inline umode_t nct6775_attr_mode(struct nct6775_data *data, struct attribute *attr)
+{
+ return data->read_only ? (attr->mode & ~0222) : attr->mode;
+}
+
+static inline int
+nct6775_add_attr_group(struct nct6775_data *data, const struct attribute_group *group)
+{
+ /* Need to leave a NULL terminator at the end of data->groups */
+ if (data->num_groups == ARRAY_SIZE(data->groups) - 1)
+ return -ENOBUFS;
+
+ data->groups[data->num_groups++] = group;
+ return 0;
+}
+
+#define NCT6775_REG_BANK 0x4E
+#define NCT6775_REG_CONFIG 0x40
+
+#define NCT6775_REG_FANDIV1 0x506
+#define NCT6775_REG_FANDIV2 0x507
+
+#define NCT6791_REG_HM_IO_SPACE_LOCK_ENABLE 0x28
+
+/*
+ * ALARM_BITS and BEEP_BITS store bit-index for the mask of the registers
+ * loaded into data->alarm and data->beep.
+ *
+ * Every input register (IN/TEMP/FAN) must have a corresponding
+ * ALARM/BEEP bit at the same index BITS[BASE + index]
+ * Set value to -1 to disable the visibility of that '*_alarm' attribute and
+ * to pad the bits until the next BASE
+ *
+ * Beep has an additional GLOBAL_BEEP_ENABLE bit
+ */
+#define VIN_ALARM_BASE 0
+#define FAN_ALARM_BASE 24
+#define TEMP_ALARM_BASE 36
+#define INTRUSION_ALARM_BASE 48
+#define BEEP_ENABLE_BASE 50
+
+#define NUM_ALARM_BITS (INTRUSION_ALARM_BASE + 4)
+#define NUM_BEEP_BITS (BEEP_ENABLE_BASE + 1)
+
+/*
+ * Not currently used:
+ * REG_MAN_ID has the value 0x5ca3 for all supported chips.
+ * REG_CHIP_ID == 0x88/0xa1/0xc1 depending on chip model.
+ * REG_MAN_ID is at port 0x4f
+ * REG_CHIP_ID is at port 0x58
+ */
+
+#endif /* __HWMON_NCT6775_H__ */