Hi Guenter,
On 2/10/2020 2:26 am, Guenter Roeck wrote:
> On 9/29/20 1:59 AM, Rahul Tanwar wrote:
>> PVT controller (MR75203) is used to configure & control
>> Moortec embedded analog IP which contains temprature
>> sensor(TS), voltage monitor(VM) & process detector(PD)
>> modules. Add hardware monitoring driver to support
>> MR75203 PVT controller.
>>
>> Signed-off-by: Rahul Tanwar <rahul.tan...@linux.intel.com>
>> ---
>> drivers/hwmon/Kconfig | 10 +
>> drivers/hwmon/Makefile | 1 +
>> drivers/hwmon/mr75203.c | 605
>> ++++++++++++++++++++++++++++++++++++++++++++++++
>> 3 files changed, 616 insertions(+)
>> create mode 100644 drivers/hwmon/mr75203.c
>>
>> diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
>> index 8dc28b26916e..2defb46677b4 100644
>> --- a/drivers/hwmon/Kconfig
>> +++ b/drivers/hwmon/Kconfig
>> @@ -1112,6 +1112,16 @@ config SENSORS_MENF21BMC_HWMON
>> This driver can also be built as a module. If so the module
>> will be called menf21bmc_hwmon.
>>
>> +config SENSORS_MR75203
>> + tristate "Moortec Semiconductor MR75203 PVT Controller"
>> + select REGMAP_MMIO
>> + help
>> + If you say yes here you get support for Moortec MR75203
>> + PVT controller.
>> +
>> + This driver can also be built as a module. If so, the module
>> + will be called mr75203.
>> +
>> config SENSORS_ADCXX
>> tristate "National Semiconductor ADCxxxSxxx"
>> depends on SPI_MASTER
>> diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
>> index a8f4b35b136b..bb4bd92a5149 100644
>> --- a/drivers/hwmon/Makefile
>> +++ b/drivers/hwmon/Makefile
>> @@ -142,6 +142,7 @@ obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o
>> obj-$(CONFIG_SENSORS_TC654) += tc654.o
>> obj-$(CONFIG_SENSORS_MLXREG_FAN) += mlxreg-fan.o
>> obj-$(CONFIG_SENSORS_MENF21BMC_HWMON) += menf21bmc_hwmon.o
>> +obj-$(CONFIG_SENSORS_MR75203) += mr75203.o
>> obj-$(CONFIG_SENSORS_NCT6683) += nct6683.o
>> obj-$(CONFIG_SENSORS_NCT6775) += nct6775.o
>> obj-$(CONFIG_SENSORS_NCT7802) += nct7802.o
>> diff --git a/drivers/hwmon/mr75203.c b/drivers/hwmon/mr75203.c
>> new file mode 100644
>> index 000000000000..30a70a3ae82b
>> --- /dev/null
>> +++ b/drivers/hwmon/mr75203.c
>> @@ -0,0 +1,605 @@
>> +// 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 temprature sensor(TS),
>
> temperature
Well noted.
>> + * voltage monitor(VM) & process detector(PD) modules.
>> + */
>> +#include <linux/clk.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>
>> +
>> +/* 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
>> +
>> +/* 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 HZ_PER_MHZ 1000000L
>> +
>> +#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(n) (VM_COM_REG_SIZE + 0x34 + 0x200 * (n))
>> +#define VM_SDIF_DATA(n) (VM_COM_REG_SIZE + 0x40 + 0x200 * (n))
>> +
>> +/* 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 0x80
>> +#define POWER_DELAY_CYCLE_64 0x40
>> +
>> +#define PVT_POLL_DELAY_US 20
>> +#define PVT_POLL_TIMEOUT_US 20000
>> +#define PVT_H_CONST 100000
>> +#define PVT_CAL5_CONST 2047
>> +#define PVT_G_CONST 40000
>> +#define PVT_CONV_BITS 10
>> +#define PVT_N_CONST 90
>> +#define PVT_R_CONST 245805
>> +
>> +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;
>> + u32 t_num;
>> + u32 p_num;
>> + u32 v_num;
>> + u32 ip_freq;
>> + u8 *vm_idx;
>> +};
>> +
>> +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;
>> + else
>> + return 0;
>> + case hwmon_in:
>> + if (attr == hwmon_in_input)
>> + return 0444;
>> + else
>> + return 0;
> else after return is unnecessary.
Agree, will update.
>> + default:
>> + return 0;
>> + }
>> +}
>> +
>> +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;
>> + u64 tmp;
>> +
>> + if (channel >= pvt->t_num)
>> + return -EINVAL;
>> +
> Those checks are not really needed.
Well noted.
>> + 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;
>> +
>> + regmap_read(t_map, SDIF_DATA(channel), &nbs);
> regmap_read() can return an error.
Yes, agree. Will update all regmap read/writes.
>> + nbs &= SAMPLE_DATA_MSK;
>> +
>> + /*
>> + * Convert the register value to
>> + * degrees centigrade temperature
>> + */
>> + tmp = nbs * PVT_H_CONST;
>> + do_div(tmp, PVT_CAL5_CONST);
>> + *val = tmp - PVT_G_CONST - pvt->ip_freq;
>> +
>> + 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;
>> + u8 vm_idx;
>> + int ret;
>> +
>> + if (channel >= pvt->v_num)
>> + return -EINVAL;
>> +
>> + vm_idx = pvt->vm_idx[channel];
>> +
>> + 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;
>> +
>> + regmap_read(v_map, VM_SDIF_DATA(vm_idx), &n);
> regmap_read can return an error.
>
>> + n &= SAMPLE_DATA_MSK;
>> + /* Convert the N bitstream count into voltage */
>> + *val = (PVT_N_CONST * n - PVT_R_CONST) >> 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 const u32 pvt_chip_config[] = {
>> + HWMON_C_REGISTER_TZ,
>> + 0
>> +};
>> +
>> +static const struct hwmon_channel_info pvt_chip = {
>> + .type = hwmon_chip,
>> + .config = pvt_chip_config,
>> +};
>> +
>> +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;
>> + }
>> +
>> + 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 = sys_freq * 100 / (key + 2);
>> +
>> + if (t_num) {
>> + regmap_write(t_map, SDIF_SMPL_CTRL, 0x0);
>> + regmap_write(t_map, SDIF_HALT, 0x0);
>> + regmap_write(t_map, CLK_SYNTH, clk_synth);
>> + regmap_write(t_map, SDIF_DISABLE, 0x0);
>> +
> regmap_write can return an error. If this doesn't apply here for some reason
> (same as the reads), please add a note to the top of the driver explaining
> the reason.
>
>> + 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;
>> + regmap_write(t_map, SDIF_W, val);
>> +
>> + 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;
>> + regmap_write(t_map, SDIF_W, val);
>> +
>> + 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;
>> + regmap_write(t_map, SDIF_W, val);
>> + }
>> +
>> + if (p_num) {
>> + regmap_write(p_map, SDIF_HALT, 0x0);
>> + regmap_write(p_map, SDIF_DISABLE, BIT(p_num) - 1);
>> + regmap_write(p_map, CLK_SYNTH, clk_synth);
>> + }
>> +
>> + if (v_num) {
>> + regmap_write(v_map, SDIF_SMPL_CTRL, 0x0);
>> + regmap_write(v_map, SDIF_HALT, 0x0);
>> + regmap_write(v_map, CLK_SYNTH, clk_synth);
>> + regmap_write(v_map, SDIF_DISABLE, 0x0);
>> +
>> + 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;
>> + regmap_write(v_map, SDIF_W, val);
>> +
>> + 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;
>> + regmap_write(v_map, SDIF_W, val);
>> +
>> + 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;
>> + regmap_write(v_map, SDIF_W, val);
>> + }
>> +
>> + 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;
> This may be convenient, but I am concerned that it might cause trouble if
> there
> is more than one such controller in the system. Can you confirm that there
> will
> always be one, and exactly one, such device in any given system ?
Yes, it is confirmed that there will be only one and exactly one such controller
in any given system.
>> + *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_clk_disable(void *data)
>> +{
>> + struct pvt_device *pvt = data;
>> +
>> + clk_disable_unprepare(pvt->clk);
>> +}
>> +
>> +static int pvt_clk_enable(struct device *dev, struct pvt_device *pvt)
>> +{
>> + int ret;
>> +
>> + ret = clk_prepare_enable(pvt->clk);
>> + if (ret)
>> + return ret;
>> +
>> + return devm_add_action_or_reset(dev, pvt_clk_disable, pvt);
>> +}
>> +
>> +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 mr75203_probe(struct platform_device *pdev)
>> +{
>> + const struct hwmon_channel_info **pvt_info;
>> + u32 ts_num, vm_num, pd_num, val, index, i;
>> + 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(dev, NULL);
>> + if (IS_ERR(pvt->clk))
>> + return dev_err_probe(dev, PTR_ERR(pvt->clk), "failed to get
>> clock\n");
>> +
>> + ret = pvt_clk_enable(dev, pvt);
>> + if (ret) {
>> + dev_err(dev, "failed to enable clock\n");
>> + return ret;
>> + }
>> +
>> + pvt->rst = devm_reset_control_get_exclusive(dev, NULL);
>> + if (IS_ERR(pvt->rst))
>> + return dev_err_probe(dev, PTR_ERR(pvt->rst),
>> + "failed to get reset control\n");
>> +
>> + ret = pvt_reset_control_deassert(dev, pvt);
>> + if (ret)
>> + return dev_err_probe(dev, ret, "cannot deassert reset
>> control\n");
>> +
>> + regmap_read(pvt->c_map, PVT_IP_CONFIG, &val);
>> + 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;
>> + 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] = &pvt_chip;
>> + index = 1;
>> +
>> + if (ts_num) {
>> + ret = pvt_get_regmap(pdev, "ts", pvt);
>> + if (ret)
>> + return ret;
>> +
>> + temp_config = devm_kcalloc(dev, ts_num + 1,
>> + sizeof(*temp_config), GFP_KERNEL);
>> + if (!temp_config)
>> + return -ENOMEM;
>> +
>> + for (i = 0; i < ts_num; i++)
>> + temp_config[i] = HWMON_T_INPUT;
>> +
>> + temp_config[ts_num] = 0;
>> + pvt_temp.config = temp_config;
>> +
>> + pvt_info[index++] = &pvt_temp;
>> + }
>> +
>> + if (pd_num) {
>> + ret = pvt_get_regmap(pdev, "pd", pvt);
>> + if (ret)
>> + return ret;
>> + }
>> +
>> + if (vm_num) {
>> + u32 num = vm_num;
>> +
>> + ret = pvt_get_regmap(pdev, "vm", pvt);
>> + if (ret)
>> + return ret;
>> +
>> + pvt->vm_idx = devm_kcalloc(dev, vm_num, sizeof(*pvt->vm_idx),
>> + GFP_KERNEL);
>> + if (!pvt->vm_idx)
>> + return -ENOMEM;
>> +
>> + for (i = 0; i < vm_num; i++)
>> + pvt->vm_idx[i] = i;
>> +
>> + ret = device_property_read_u8_array(dev, "intel,vm-map",
>> + pvt->vm_idx, vm_num);
>> + if (!ret)
>> + for (i = 0; i < vm_num; i++)
>> + if (pvt->vm_idx[i] >= vm_num ||
>> + pvt->vm_idx[i] == 0xff) {
>> + num = i;
>> + break;
>> + }
>> +
>> + in_config = devm_kcalloc(dev, num + 1,
>> + sizeof(*in_config), GFP_KERNEL);
>> + if (!in_config)
>> + return -ENOMEM;
>> +
>> + memset32(in_config, HWMON_I_INPUT, num);
>> + in_config[num] = 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");
>>
Thanks.
Regards,
Rahul
