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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (C) 2020 MaxLinear, Inc.
- *
- * This driver is a hardware monitoring driver for PVT controller
- * (MR75203) which is used to configure & control Moortec embedded
- * analog IP to enable multiple embedded temperature sensor(TS),
- * voltage monitor(VM) & process detector(PD) modules.
- */
- #include <linux/bits.h>
- #include <linux/clk.h>
- #include <linux/debugfs.h>
- #include <linux/hwmon.h>
- #include <linux/module.h>
- #include <linux/mod_devicetable.h>
- #include <linux/mutex.h>
- #include <linux/platform_device.h>
- #include <linux/property.h>
- #include <linux/regmap.h>
- #include <linux/reset.h>
- #include <linux/slab.h>
- #include <linux/units.h>
- /* PVT Common register */
- #define PVT_IP_CONFIG 0x04
- #define TS_NUM_MSK GENMASK(4, 0)
- #define TS_NUM_SFT 0
- #define PD_NUM_MSK GENMASK(12, 8)
- #define PD_NUM_SFT 8
- #define VM_NUM_MSK GENMASK(20, 16)
- #define VM_NUM_SFT 16
- #define CH_NUM_MSK GENMASK(31, 24)
- #define CH_NUM_SFT 24
- #define VM_NUM_MAX (VM_NUM_MSK >> VM_NUM_SFT)
- /* Macro Common Register */
- #define CLK_SYNTH 0x00
- #define CLK_SYNTH_LO_SFT 0
- #define CLK_SYNTH_HI_SFT 8
- #define CLK_SYNTH_HOLD_SFT 16
- #define CLK_SYNTH_EN BIT(24)
- #define CLK_SYS_CYCLES_MAX 514
- #define CLK_SYS_CYCLES_MIN 2
- #define SDIF_DISABLE 0x04
- #define SDIF_STAT 0x08
- #define SDIF_BUSY BIT(0)
- #define SDIF_LOCK BIT(1)
- #define SDIF_W 0x0c
- #define SDIF_PROG BIT(31)
- #define SDIF_WRN_W BIT(27)
- #define SDIF_WRN_R 0x00
- #define SDIF_ADDR_SFT 24
- #define SDIF_HALT 0x10
- #define SDIF_CTRL 0x14
- #define SDIF_SMPL_CTRL 0x20
- /* TS & PD Individual Macro Register */
- #define COM_REG_SIZE 0x40
- #define SDIF_DONE(n) (COM_REG_SIZE + 0x14 + 0x40 * (n))
- #define SDIF_SMPL_DONE BIT(0)
- #define SDIF_DATA(n) (COM_REG_SIZE + 0x18 + 0x40 * (n))
- #define SAMPLE_DATA_MSK GENMASK(15, 0)
- #define HILO_RESET(n) (COM_REG_SIZE + 0x2c + 0x40 * (n))
- /* VM Individual Macro Register */
- #define VM_COM_REG_SIZE 0x200
- #define VM_SDIF_DONE(vm) (VM_COM_REG_SIZE + 0x34 + 0x200 * (vm))
- #define VM_SDIF_DATA(vm, ch) \
- (VM_COM_REG_SIZE + 0x40 + 0x200 * (vm) + 0x4 * (ch))
- /* SDA Slave Register */
- #define IP_CTRL 0x00
- #define IP_RST_REL BIT(1)
- #define IP_RUN_CONT BIT(3)
- #define IP_AUTO BIT(8)
- #define IP_VM_MODE BIT(10)
- #define IP_CFG 0x01
- #define CFG0_MODE_2 BIT(0)
- #define CFG0_PARALLEL_OUT 0
- #define CFG0_12_BIT 0
- #define CFG1_VOL_MEAS_MODE 0
- #define CFG1_PARALLEL_OUT 0
- #define CFG1_14_BIT 0
- #define IP_DATA 0x03
- #define IP_POLL 0x04
- #define VM_CH_INIT BIT(20)
- #define VM_CH_REQ BIT(21)
- #define IP_TMR 0x05
- #define POWER_DELAY_CYCLE_256 0x100
- #define POWER_DELAY_CYCLE_64 0x40
- #define PVT_POLL_DELAY_US 20
- #define PVT_POLL_TIMEOUT_US 20000
- #define PVT_CONV_BITS 10
- #define PVT_N_CONST 90
- #define PVT_R_CONST 245805
- #define PVT_TEMP_MIN_mC -40000
- #define PVT_TEMP_MAX_mC 125000
- /* Temperature coefficients for series 5 */
- #define PVT_SERIES5_H_CONST 200000
- #define PVT_SERIES5_G_CONST 60000
- #define PVT_SERIES5_J_CONST -100
- #define PVT_SERIES5_CAL5_CONST 4094
- /* Temperature coefficients for series 6 */
- #define PVT_SERIES6_H_CONST 249400
- #define PVT_SERIES6_G_CONST 57400
- #define PVT_SERIES6_J_CONST 0
- #define PVT_SERIES6_CAL5_CONST 4096
- #define TEMPERATURE_SENSOR_SERIES_5 5
- #define TEMPERATURE_SENSOR_SERIES_6 6
- #define PRE_SCALER_X1 1
- #define PRE_SCALER_X2 2
- /**
- * struct voltage_device - VM single input parameters.
- * @vm_map: Map channel number to VM index.
- * @ch_map: Map channel number to channel index.
- * @pre_scaler: Pre scaler value (1 or 2) used to normalize the voltage output
- * result.
- *
- * The structure provides mapping between channel-number (0..N-1) to VM-index
- * (0..num_vm-1) and channel-index (0..ch_num-1) where N = num_vm * ch_num.
- * It also provides normalization factor for the VM equation.
- */
- struct voltage_device {
- u32 vm_map;
- u32 ch_map;
- u32 pre_scaler;
- };
- /**
- * struct voltage_channels - VM channel count.
- * @total: Total number of channels in all VMs.
- * @max: Maximum number of channels among all VMs.
- *
- * The structure provides channel count information across all VMs.
- */
- struct voltage_channels {
- u32 total;
- u8 max;
- };
- struct temp_coeff {
- u32 h;
- u32 g;
- u32 cal5;
- s32 j;
- };
- struct pvt_device {
- struct regmap *c_map;
- struct regmap *t_map;
- struct regmap *p_map;
- struct regmap *v_map;
- struct clk *clk;
- struct reset_control *rst;
- struct dentry *dbgfs_dir;
- struct voltage_device *vd;
- struct voltage_channels vm_channels;
- struct temp_coeff ts_coeff;
- u32 t_num;
- u32 p_num;
- u32 v_num;
- u32 ip_freq;
- };
- static ssize_t pvt_ts_coeff_j_read(struct file *file, char __user *user_buf,
- size_t count, loff_t *ppos)
- {
- struct pvt_device *pvt = file->private_data;
- unsigned int len;
- char buf[13];
- len = scnprintf(buf, sizeof(buf), "%d\n", pvt->ts_coeff.j);
- return simple_read_from_buffer(user_buf, count, ppos, buf, len);
- }
- static ssize_t pvt_ts_coeff_j_write(struct file *file,
- const char __user *user_buf,
- size_t count, loff_t *ppos)
- {
- struct pvt_device *pvt = file->private_data;
- int ret;
- ret = kstrtos32_from_user(user_buf, count, 0, &pvt->ts_coeff.j);
- if (ret)
- return ret;
- return count;
- }
- static const struct file_operations pvt_ts_coeff_j_fops = {
- .read = pvt_ts_coeff_j_read,
- .write = pvt_ts_coeff_j_write,
- .open = simple_open,
- .owner = THIS_MODULE,
- .llseek = default_llseek,
- };
- static void devm_pvt_ts_dbgfs_remove(void *data)
- {
- struct pvt_device *pvt = (struct pvt_device *)data;
- debugfs_remove_recursive(pvt->dbgfs_dir);
- pvt->dbgfs_dir = NULL;
- }
- static int pvt_ts_dbgfs_create(struct pvt_device *pvt, struct device *dev)
- {
- pvt->dbgfs_dir = debugfs_create_dir(dev_name(dev), NULL);
- debugfs_create_u32("ts_coeff_h", 0644, pvt->dbgfs_dir,
- &pvt->ts_coeff.h);
- debugfs_create_u32("ts_coeff_g", 0644, pvt->dbgfs_dir,
- &pvt->ts_coeff.g);
- debugfs_create_u32("ts_coeff_cal5", 0644, pvt->dbgfs_dir,
- &pvt->ts_coeff.cal5);
- debugfs_create_file("ts_coeff_j", 0644, pvt->dbgfs_dir, pvt,
- &pvt_ts_coeff_j_fops);
- return devm_add_action_or_reset(dev, devm_pvt_ts_dbgfs_remove, pvt);
- }
- static umode_t pvt_is_visible(const void *data, enum hwmon_sensor_types type,
- u32 attr, int channel)
- {
- switch (type) {
- case hwmon_temp:
- if (attr == hwmon_temp_input)
- return 0444;
- break;
- case hwmon_in:
- if (attr == hwmon_in_input)
- return 0444;
- break;
- default:
- break;
- }
- return 0;
- }
- static long pvt_calc_temp(struct pvt_device *pvt, u32 nbs)
- {
- /*
- * Convert the register value to degrees centigrade temperature:
- * T = G + H * (n / cal5 - 0.5) + J * F
- */
- struct temp_coeff *ts_coeff = &pvt->ts_coeff;
- s64 tmp = ts_coeff->g +
- div_s64(ts_coeff->h * (s64)nbs, ts_coeff->cal5) -
- ts_coeff->h / 2 +
- div_s64(ts_coeff->j * (s64)pvt->ip_freq, HZ_PER_MHZ);
- return clamp_val(tmp, PVT_TEMP_MIN_mC, PVT_TEMP_MAX_mC);
- }
- static int pvt_read_temp(struct device *dev, u32 attr, int channel, long *val)
- {
- struct pvt_device *pvt = dev_get_drvdata(dev);
- struct regmap *t_map = pvt->t_map;
- u32 stat, nbs;
- int ret;
- switch (attr) {
- case hwmon_temp_input:
- ret = regmap_read_poll_timeout(t_map, SDIF_DONE(channel),
- stat, stat & SDIF_SMPL_DONE,
- PVT_POLL_DELAY_US,
- PVT_POLL_TIMEOUT_US);
- if (ret)
- return ret;
- ret = regmap_read(t_map, SDIF_DATA(channel), &nbs);
- if (ret < 0)
- return ret;
- nbs &= SAMPLE_DATA_MSK;
- /*
- * Convert the register value to
- * degrees centigrade temperature
- */
- *val = pvt_calc_temp(pvt, nbs);
- return 0;
- default:
- return -EOPNOTSUPP;
- }
- }
- static int pvt_read_in(struct device *dev, u32 attr, int channel, long *val)
- {
- struct pvt_device *pvt = dev_get_drvdata(dev);
- struct regmap *v_map = pvt->v_map;
- u32 n, stat, pre_scaler;
- u8 vm_idx, ch_idx;
- int ret;
- if (channel >= pvt->vm_channels.total)
- return -EINVAL;
- vm_idx = pvt->vd[channel].vm_map;
- ch_idx = pvt->vd[channel].ch_map;
- switch (attr) {
- case hwmon_in_input:
- ret = regmap_read_poll_timeout(v_map, VM_SDIF_DONE(vm_idx),
- stat, stat & SDIF_SMPL_DONE,
- PVT_POLL_DELAY_US,
- PVT_POLL_TIMEOUT_US);
- if (ret)
- return ret;
- ret = regmap_read(v_map, VM_SDIF_DATA(vm_idx, ch_idx), &n);
- if (ret < 0)
- return ret;
- n &= SAMPLE_DATA_MSK;
- pre_scaler = pvt->vd[channel].pre_scaler;
- /*
- * Convert the N bitstream count into voltage.
- * To support negative voltage calculation for 64bit machines
- * n must be cast to long, since n and *val differ both in
- * signedness and in size.
- * Division is used instead of right shift, because for signed
- * numbers, the sign bit is used to fill the vacated bit
- * positions, and if the number is negative, 1 is used.
- * BIT(x) may not be used instead of (1 << x) because it's
- * unsigned.
- */
- *val = pre_scaler * (PVT_N_CONST * (long)n - PVT_R_CONST) /
- (1 << PVT_CONV_BITS);
- return 0;
- default:
- return -EOPNOTSUPP;
- }
- }
- static int pvt_read(struct device *dev, enum hwmon_sensor_types type,
- u32 attr, int channel, long *val)
- {
- switch (type) {
- case hwmon_temp:
- return pvt_read_temp(dev, attr, channel, val);
- case hwmon_in:
- return pvt_read_in(dev, attr, channel, val);
- default:
- return -EOPNOTSUPP;
- }
- }
- static struct hwmon_channel_info pvt_temp = {
- .type = hwmon_temp,
- };
- static struct hwmon_channel_info pvt_in = {
- .type = hwmon_in,
- };
- static const struct hwmon_ops pvt_hwmon_ops = {
- .is_visible = pvt_is_visible,
- .read = pvt_read,
- };
- static struct hwmon_chip_info pvt_chip_info = {
- .ops = &pvt_hwmon_ops,
- };
- static int pvt_init(struct pvt_device *pvt)
- {
- u16 sys_freq, key, middle, low = 4, high = 8;
- struct regmap *t_map = pvt->t_map;
- struct regmap *p_map = pvt->p_map;
- struct regmap *v_map = pvt->v_map;
- u32 t_num = pvt->t_num;
- u32 p_num = pvt->p_num;
- u32 v_num = pvt->v_num;
- u32 clk_synth, val;
- int ret;
- sys_freq = clk_get_rate(pvt->clk) / HZ_PER_MHZ;
- while (high >= low) {
- middle = (low + high + 1) / 2;
- key = DIV_ROUND_CLOSEST(sys_freq, middle);
- if (key > CLK_SYS_CYCLES_MAX) {
- low = middle + 1;
- continue;
- } else if (key < CLK_SYS_CYCLES_MIN) {
- high = middle - 1;
- continue;
- } else {
- break;
- }
- }
- /*
- * The system supports 'clk_sys' to 'clk_ip' frequency ratios
- * from 2:1 to 512:1
- */
- key = clamp_val(key, CLK_SYS_CYCLES_MIN, CLK_SYS_CYCLES_MAX) - 2;
- clk_synth = ((key + 1) >> 1) << CLK_SYNTH_LO_SFT |
- (key >> 1) << CLK_SYNTH_HI_SFT |
- (key >> 1) << CLK_SYNTH_HOLD_SFT | CLK_SYNTH_EN;
- pvt->ip_freq = clk_get_rate(pvt->clk) / (key + 2);
- if (t_num) {
- ret = regmap_write(t_map, SDIF_SMPL_CTRL, 0x0);
- if (ret < 0)
- return ret;
- ret = regmap_write(t_map, SDIF_HALT, 0x0);
- if (ret < 0)
- return ret;
- ret = regmap_write(t_map, CLK_SYNTH, clk_synth);
- if (ret < 0)
- return ret;
- ret = regmap_write(t_map, SDIF_DISABLE, 0x0);
- if (ret < 0)
- return ret;
- ret = regmap_read_poll_timeout(t_map, SDIF_STAT,
- val, !(val & SDIF_BUSY),
- PVT_POLL_DELAY_US,
- PVT_POLL_TIMEOUT_US);
- if (ret)
- return ret;
- val = CFG0_MODE_2 | CFG0_PARALLEL_OUT | CFG0_12_BIT |
- IP_CFG << SDIF_ADDR_SFT | SDIF_WRN_W | SDIF_PROG;
- ret = regmap_write(t_map, SDIF_W, val);
- if (ret < 0)
- return ret;
- ret = regmap_read_poll_timeout(t_map, SDIF_STAT,
- val, !(val & SDIF_BUSY),
- PVT_POLL_DELAY_US,
- PVT_POLL_TIMEOUT_US);
- if (ret)
- return ret;
- val = POWER_DELAY_CYCLE_256 | IP_TMR << SDIF_ADDR_SFT |
- SDIF_WRN_W | SDIF_PROG;
- ret = regmap_write(t_map, SDIF_W, val);
- if (ret < 0)
- return ret;
- ret = regmap_read_poll_timeout(t_map, SDIF_STAT,
- val, !(val & SDIF_BUSY),
- PVT_POLL_DELAY_US,
- PVT_POLL_TIMEOUT_US);
- if (ret)
- return ret;
- val = IP_RST_REL | IP_RUN_CONT | IP_AUTO |
- IP_CTRL << SDIF_ADDR_SFT |
- SDIF_WRN_W | SDIF_PROG;
- ret = regmap_write(t_map, SDIF_W, val);
- if (ret < 0)
- return ret;
- }
- if (p_num) {
- ret = regmap_write(p_map, SDIF_HALT, 0x0);
- if (ret < 0)
- return ret;
- ret = regmap_write(p_map, SDIF_DISABLE, BIT(p_num) - 1);
- if (ret < 0)
- return ret;
- ret = regmap_write(p_map, CLK_SYNTH, clk_synth);
- if (ret < 0)
- return ret;
- }
- if (v_num) {
- ret = regmap_write(v_map, SDIF_SMPL_CTRL, 0x0);
- if (ret < 0)
- return ret;
- ret = regmap_write(v_map, SDIF_HALT, 0x0);
- if (ret < 0)
- return ret;
- ret = regmap_write(v_map, CLK_SYNTH, clk_synth);
- if (ret < 0)
- return ret;
- ret = regmap_write(v_map, SDIF_DISABLE, 0x0);
- if (ret < 0)
- return ret;
- ret = regmap_read_poll_timeout(v_map, SDIF_STAT,
- val, !(val & SDIF_BUSY),
- PVT_POLL_DELAY_US,
- PVT_POLL_TIMEOUT_US);
- if (ret)
- return ret;
- val = (BIT(pvt->vm_channels.max) - 1) | VM_CH_INIT |
- IP_POLL << SDIF_ADDR_SFT | SDIF_WRN_W | SDIF_PROG;
- ret = regmap_write(v_map, SDIF_W, val);
- if (ret < 0)
- return ret;
- ret = regmap_read_poll_timeout(v_map, SDIF_STAT,
- val, !(val & SDIF_BUSY),
- PVT_POLL_DELAY_US,
- PVT_POLL_TIMEOUT_US);
- if (ret)
- return ret;
- val = CFG1_VOL_MEAS_MODE | CFG1_PARALLEL_OUT |
- CFG1_14_BIT | IP_CFG << SDIF_ADDR_SFT |
- SDIF_WRN_W | SDIF_PROG;
- ret = regmap_write(v_map, SDIF_W, val);
- if (ret < 0)
- return ret;
- ret = regmap_read_poll_timeout(v_map, SDIF_STAT,
- val, !(val & SDIF_BUSY),
- PVT_POLL_DELAY_US,
- PVT_POLL_TIMEOUT_US);
- if (ret)
- return ret;
- val = POWER_DELAY_CYCLE_64 | IP_TMR << SDIF_ADDR_SFT |
- SDIF_WRN_W | SDIF_PROG;
- ret = regmap_write(v_map, SDIF_W, val);
- if (ret < 0)
- return ret;
- ret = regmap_read_poll_timeout(v_map, SDIF_STAT,
- val, !(val & SDIF_BUSY),
- PVT_POLL_DELAY_US,
- PVT_POLL_TIMEOUT_US);
- if (ret)
- return ret;
- val = IP_RST_REL | IP_RUN_CONT | IP_AUTO | IP_VM_MODE |
- IP_CTRL << SDIF_ADDR_SFT |
- SDIF_WRN_W | SDIF_PROG;
- ret = regmap_write(v_map, SDIF_W, val);
- if (ret < 0)
- return ret;
- }
- return 0;
- }
- static struct regmap_config pvt_regmap_config = {
- .reg_bits = 32,
- .reg_stride = 4,
- .val_bits = 32,
- };
- static int pvt_get_regmap(struct platform_device *pdev, char *reg_name,
- struct pvt_device *pvt)
- {
- struct device *dev = &pdev->dev;
- struct regmap **reg_map;
- void __iomem *io_base;
- if (!strcmp(reg_name, "common"))
- reg_map = &pvt->c_map;
- else if (!strcmp(reg_name, "ts"))
- reg_map = &pvt->t_map;
- else if (!strcmp(reg_name, "pd"))
- reg_map = &pvt->p_map;
- else if (!strcmp(reg_name, "vm"))
- reg_map = &pvt->v_map;
- else
- return -EINVAL;
- io_base = devm_platform_ioremap_resource_byname(pdev, reg_name);
- if (IS_ERR(io_base))
- return PTR_ERR(io_base);
- pvt_regmap_config.name = reg_name;
- *reg_map = devm_regmap_init_mmio(dev, io_base, &pvt_regmap_config);
- if (IS_ERR(*reg_map)) {
- dev_err(dev, "failed to init register map\n");
- return PTR_ERR(*reg_map);
- }
- return 0;
- }
- static void pvt_reset_control_assert(void *data)
- {
- struct pvt_device *pvt = data;
- reset_control_assert(pvt->rst);
- }
- static int pvt_reset_control_deassert(struct device *dev, struct pvt_device *pvt)
- {
- int ret;
- ret = reset_control_deassert(pvt->rst);
- if (ret)
- return ret;
- return devm_add_action_or_reset(dev, pvt_reset_control_assert, pvt);
- }
- static int pvt_get_active_channel(struct device *dev, struct pvt_device *pvt,
- u32 vm_num, u32 ch_num, u8 *vm_idx)
- {
- u8 vm_active_ch[VM_NUM_MAX];
- int ret, i, j, k;
- ret = device_property_read_u8_array(dev, "moortec,vm-active-channels",
- vm_active_ch, vm_num);
- if (ret) {
- /*
- * Incase "moortec,vm-active-channels" property is not defined,
- * we assume each VM sensor has all of its channels active.
- */
- memset(vm_active_ch, ch_num, vm_num);
- pvt->vm_channels.max = ch_num;
- pvt->vm_channels.total = ch_num * vm_num;
- } else {
- for (i = 0; i < vm_num; i++) {
- if (vm_active_ch[i] > ch_num) {
- dev_err(dev, "invalid active channels: %u\n",
- vm_active_ch[i]);
- return -EINVAL;
- }
- pvt->vm_channels.total += vm_active_ch[i];
- if (vm_active_ch[i] > pvt->vm_channels.max)
- pvt->vm_channels.max = vm_active_ch[i];
- }
- }
- /*
- * Map between the channel-number to VM-index and channel-index.
- * Example - 3 VMs, "moortec,vm_active_ch" = <5 2 4>:
- * vm_map = [0 0 0 0 0 1 1 2 2 2 2]
- * ch_map = [0 1 2 3 4 0 1 0 1 2 3]
- */
- pvt->vd = devm_kcalloc(dev, pvt->vm_channels.total, sizeof(*pvt->vd),
- GFP_KERNEL);
- if (!pvt->vd)
- return -ENOMEM;
- k = 0;
- for (i = 0; i < vm_num; i++) {
- for (j = 0; j < vm_active_ch[i]; j++) {
- pvt->vd[k].vm_map = vm_idx[i];
- pvt->vd[k].ch_map = j;
- k++;
- }
- }
- return 0;
- }
- static int pvt_get_pre_scaler(struct device *dev, struct pvt_device *pvt)
- {
- u8 *pre_scaler_ch_list;
- int i, ret, num_ch;
- u32 channel;
- /* Set default pre-scaler value to be 1. */
- for (i = 0; i < pvt->vm_channels.total; i++)
- pvt->vd[i].pre_scaler = PRE_SCALER_X1;
- /* Get number of channels configured in "moortec,vm-pre-scaler-x2". */
- num_ch = device_property_count_u8(dev, "moortec,vm-pre-scaler-x2");
- if (num_ch <= 0)
- return 0;
- pre_scaler_ch_list = kcalloc(num_ch, sizeof(*pre_scaler_ch_list),
- GFP_KERNEL);
- if (!pre_scaler_ch_list)
- return -ENOMEM;
- /* Get list of all channels that have pre-scaler of 2. */
- ret = device_property_read_u8_array(dev, "moortec,vm-pre-scaler-x2",
- pre_scaler_ch_list, num_ch);
- if (ret)
- goto out;
- for (i = 0; i < num_ch; i++) {
- channel = pre_scaler_ch_list[i];
- pvt->vd[channel].pre_scaler = PRE_SCALER_X2;
- }
- out:
- kfree(pre_scaler_ch_list);
- return ret;
- }
- static int pvt_set_temp_coeff(struct device *dev, struct pvt_device *pvt)
- {
- struct temp_coeff *ts_coeff = &pvt->ts_coeff;
- u32 series;
- int ret;
- /* Incase ts-series property is not defined, use default 5. */
- ret = device_property_read_u32(dev, "moortec,ts-series", &series);
- if (ret)
- series = TEMPERATURE_SENSOR_SERIES_5;
- switch (series) {
- case TEMPERATURE_SENSOR_SERIES_5:
- ts_coeff->h = PVT_SERIES5_H_CONST;
- ts_coeff->g = PVT_SERIES5_G_CONST;
- ts_coeff->j = PVT_SERIES5_J_CONST;
- ts_coeff->cal5 = PVT_SERIES5_CAL5_CONST;
- break;
- case TEMPERATURE_SENSOR_SERIES_6:
- ts_coeff->h = PVT_SERIES6_H_CONST;
- ts_coeff->g = PVT_SERIES6_G_CONST;
- ts_coeff->j = PVT_SERIES6_J_CONST;
- ts_coeff->cal5 = PVT_SERIES6_CAL5_CONST;
- break;
- default:
- dev_err(dev, "invalid temperature sensor series (%u)\n",
- series);
- return -EINVAL;
- }
- dev_dbg(dev, "temperature sensor series = %u\n", series);
- /* Override ts-coeff-h/g/j/cal5 if they are defined. */
- device_property_read_u32(dev, "moortec,ts-coeff-h", &ts_coeff->h);
- device_property_read_u32(dev, "moortec,ts-coeff-g", &ts_coeff->g);
- device_property_read_u32(dev, "moortec,ts-coeff-j", &ts_coeff->j);
- device_property_read_u32(dev, "moortec,ts-coeff-cal5", &ts_coeff->cal5);
- dev_dbg(dev, "ts-coeff: h = %u, g = %u, j = %d, cal5 = %u\n",
- ts_coeff->h, ts_coeff->g, ts_coeff->j, ts_coeff->cal5);
- return 0;
- }
- static int mr75203_probe(struct platform_device *pdev)
- {
- u32 ts_num, vm_num, pd_num, ch_num, val, index, i;
- const struct hwmon_channel_info **pvt_info;
- struct device *dev = &pdev->dev;
- u32 *temp_config, *in_config;
- struct device *hwmon_dev;
- struct pvt_device *pvt;
- int ret;
- pvt = devm_kzalloc(dev, sizeof(*pvt), GFP_KERNEL);
- if (!pvt)
- return -ENOMEM;
- ret = pvt_get_regmap(pdev, "common", pvt);
- if (ret)
- return ret;
- pvt->clk = devm_clk_get_enabled(dev, NULL);
- if (IS_ERR(pvt->clk))
- return dev_err_probe(dev, PTR_ERR(pvt->clk), "failed to get clock\n");
- pvt->rst = devm_reset_control_get_optional_exclusive(dev, NULL);
- if (IS_ERR(pvt->rst))
- return dev_err_probe(dev, PTR_ERR(pvt->rst),
- "failed to get reset control\n");
- if (pvt->rst) {
- ret = pvt_reset_control_deassert(dev, pvt);
- if (ret)
- return dev_err_probe(dev, ret,
- "cannot deassert reset control\n");
- }
- ret = regmap_read(pvt->c_map, PVT_IP_CONFIG, &val);
- if (ret < 0)
- return ret;
- ts_num = (val & TS_NUM_MSK) >> TS_NUM_SFT;
- pd_num = (val & PD_NUM_MSK) >> PD_NUM_SFT;
- vm_num = (val & VM_NUM_MSK) >> VM_NUM_SFT;
- ch_num = (val & CH_NUM_MSK) >> CH_NUM_SFT;
- pvt->t_num = ts_num;
- pvt->p_num = pd_num;
- pvt->v_num = vm_num;
- val = 0;
- if (ts_num)
- val++;
- if (vm_num)
- val++;
- if (!val)
- return -ENODEV;
- pvt_info = devm_kcalloc(dev, val + 2, sizeof(*pvt_info), GFP_KERNEL);
- if (!pvt_info)
- return -ENOMEM;
- pvt_info[0] = HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ);
- index = 1;
- if (ts_num) {
- ret = pvt_get_regmap(pdev, "ts", pvt);
- if (ret)
- return ret;
- ret = pvt_set_temp_coeff(dev, pvt);
- if (ret)
- return ret;
- temp_config = devm_kcalloc(dev, ts_num + 1,
- sizeof(*temp_config), GFP_KERNEL);
- if (!temp_config)
- return -ENOMEM;
- memset32(temp_config, HWMON_T_INPUT, ts_num);
- pvt_temp.config = temp_config;
- pvt_info[index++] = &pvt_temp;
- pvt_ts_dbgfs_create(pvt, dev);
- }
- if (pd_num) {
- ret = pvt_get_regmap(pdev, "pd", pvt);
- if (ret)
- return ret;
- }
- if (vm_num) {
- u8 vm_idx[VM_NUM_MAX];
- ret = pvt_get_regmap(pdev, "vm", pvt);
- if (ret)
- return ret;
- ret = device_property_read_u8_array(dev, "intel,vm-map", vm_idx,
- vm_num);
- if (ret) {
- /*
- * Incase intel,vm-map property is not defined, we
- * assume incremental channel numbers.
- */
- for (i = 0; i < vm_num; i++)
- vm_idx[i] = i;
- } else {
- for (i = 0; i < vm_num; i++)
- if (vm_idx[i] >= vm_num || vm_idx[i] == 0xff) {
- pvt->v_num = i;
- vm_num = i;
- break;
- }
- }
- ret = pvt_get_active_channel(dev, pvt, vm_num, ch_num, vm_idx);
- if (ret)
- return ret;
- ret = pvt_get_pre_scaler(dev, pvt);
- if (ret)
- return ret;
- in_config = devm_kcalloc(dev, pvt->vm_channels.total + 1,
- sizeof(*in_config), GFP_KERNEL);
- if (!in_config)
- return -ENOMEM;
- memset32(in_config, HWMON_I_INPUT, pvt->vm_channels.total);
- in_config[pvt->vm_channels.total] = 0;
- pvt_in.config = in_config;
- pvt_info[index++] = &pvt_in;
- }
- ret = pvt_init(pvt);
- if (ret) {
- dev_err(dev, "failed to init pvt: %d\n", ret);
- return ret;
- }
- pvt_chip_info.info = pvt_info;
- hwmon_dev = devm_hwmon_device_register_with_info(dev, "pvt",
- pvt,
- &pvt_chip_info,
- NULL);
- return PTR_ERR_OR_ZERO(hwmon_dev);
- }
- static const struct of_device_id moortec_pvt_of_match[] = {
- { .compatible = "moortec,mr75203" },
- { }
- };
- MODULE_DEVICE_TABLE(of, moortec_pvt_of_match);
- static struct platform_driver moortec_pvt_driver = {
- .driver = {
- .name = "moortec-pvt",
- .of_match_table = moortec_pvt_of_match,
- },
- .probe = mr75203_probe,
- };
- module_platform_driver(moortec_pvt_driver);
- MODULE_LICENSE("GPL v2");
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