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Tue, 29 Sep 2020 22:36:45 -0700 (PDT) Sender: Guenter Roeck Subject: Re: [PATCH v3 2/2] hwmon: intel-m10-bmc-hwmon: add hwmon support for Intel MAX 10 BMC To: Xu Yilun , lee.jones@linaro.org, jdelvare@suse.com, linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org Cc: trix@redhat.com, matthew.gerlach@linux.intel.com, russell.h.weight@intel.com, lgoncalv@redhat.com, hao.wu@intel.com, mdf@kernel.org References: <1600669071-26235-1-git-send-email-yilun.xu@intel.com> <1600669071-26235-3-git-send-email-yilun.xu@intel.com> From: Guenter Roeck Autocrypt: addr=linux@roeck-us.net; keydata= xsFNBE6H1WcBEACu6jIcw5kZ5dGeJ7E7B2uweQR/4FGxH10/H1O1+ApmcQ9i87XdZQiB9cpN RYHA7RCEK2dh6dDccykQk3bC90xXMPg+O3R+C/SkwcnUak1UZaeK/SwQbq/t0tkMzYDRxfJ7 nyFiKxUehbNF3r9qlJgPqONwX5vJy4/GvDHdddSCxV41P/ejsZ8PykxyJs98UWhF54tGRWFl 7i1xvaDB9lN5WTLRKSO7wICuLiSz5WZHXMkyF4d+/O5ll7yz/o/JxK5vO/sduYDIlFTvBZDh gzaEtNf5tQjsjG4io8E0Yq0ViobLkS2RTNZT8ICq/Jmvl0SpbHRvYwa2DhNsK0YjHFQBB0FX IdhdUEzNefcNcYvqigJpdICoP2e4yJSyflHFO4dr0OrdnGLe1Zi/8Xo/2+M1dSSEt196rXaC kwu2KgIgmkRBb3cp2vIBBIIowU8W3qC1+w+RdMUrZxKGWJ3juwcgveJlzMpMZNyM1jobSXZ0 VHGMNJ3MwXlrEFPXaYJgibcg6brM6wGfX/LBvc/haWw4yO24lT5eitm4UBdIy9pKkKmHHh7s jfZJkB5fWKVdoCv/omy6UyH6ykLOPFugl+hVL2Prf8xrXuZe1CMS7ID9Lc8FaL1ROIN/W8Vk BIsJMaWOhks//7d92Uf3EArDlDShwR2+D+AMon8NULuLBHiEUQARAQABzTJHdWVudGVyIFJv ZWNrIChMaW51eCBhY2NvdW50KSA8bGludXhAcm9lY2stdXMubmV0PsLBgQQTAQIAKwIbAwYL CQgHAwIGFQgCCQoLBBYCAwECHgECF4ACGQEFAlVcphcFCRmg06EACgkQyx8mb86fmYFg0RAA nzXJzuPkLJaOmSIzPAqqnutACchT/meCOgMEpS5oLf6xn5ySZkl23OxuhpMZTVX+49c9pvBx hpvl5bCWFu5qC1jC2eWRYU+aZZE4sxMaAGeWenQJsiG9lP8wkfCJP3ockNu0ZXXAXwIbY1O1 c+l11zQkZw89zNgWgKobKzrDMBFOYtAh0pAInZ9TSn7oA4Ctejouo5wUugmk8MrDtUVXmEA9 7f9fgKYSwl/H7dfKKsS1bDOpyJlqhEAH94BHJdK/b1tzwJCFAXFhMlmlbYEk8kWjcxQgDWMu GAthQzSuAyhqyZwFcOlMCNbAcTSQawSo3B9yM9mHJne5RrAbVz4TWLnEaX8gA5xK3uCNCeyI sqYuzA4OzcMwnnTASvzsGZoYHTFP3DQwf2nzxD6yBGCfwNGIYfS0i8YN8XcBgEcDFMWpOQhT Pu3HeztMnF3HXrc0t7e5rDW9zCh3k2PA6D2NV4fews9KDFhLlTfCVzf0PS1dRVVWM+4jVl6l HRIAgWp+2/f8dx5vPc4Ycp4IsZN0l1h9uT7qm1KTwz+sSl1zOqKD/BpfGNZfLRRxrXthvvY8 BltcuZ4+PGFTcRkMytUbMDFMF9Cjd2W9dXD35PEtvj8wnEyzIos8bbgtLrGTv/SYhmPpahJA l8hPhYvmAvpOmusUUyB30StsHIU2LLccUPPOwU0ETofVZwEQALlLbQeBDTDbwQYrj0gbx3bq 7kpKABxN2MqeuqGr02DpS9883d/t7ontxasXoEz2GTioevvRmllJlPQERVxM8gQoNg22twF7 pB/zsrIjxkE9heE4wYfN1AyzT+AxgYN6f8hVQ7Nrc9XgZZe+8IkuW/Nf64KzNJXnSH4u6nJM J2+Dt274YoFcXR1nG76Q259mKwzbCukKbd6piL+VsT/qBrLhZe9Ivbjq5WMdkQKnP7gYKCAi pNVJC4enWfivZsYupMd9qn7Uv/oCZDYoBTdMSBUblaLMwlcjnPpOYK5rfHvC4opxl+P/Vzyz 6WC2TLkPtKvYvXmdsI6rnEI4Uucg0Au/Ulg7aqqKhzGPIbVaL+U0Wk82nz6hz+WP2ggTrY1w ZlPlRt8WM9w6WfLf2j+PuGklj37m+KvaOEfLsF1v464dSpy1tQVHhhp8LFTxh/6RWkRIR2uF I4v3Xu/k5D0LhaZHpQ4C+xKsQxpTGuYh2tnRaRL14YMW1dlI3HfeB2gj7Yc8XdHh9vkpPyuT nY/ZsFbnvBtiw7GchKKri2gDhRb2QNNDyBnQn5mRFw7CyuFclAksOdV/sdpQnYlYcRQWOUGY HhQ5eqTRZjm9z+qQe/T0HQpmiPTqQcIaG/edgKVTUjITfA7AJMKLQHgp04Vylb+G6jocnQQX JqvvP09whbqrABEBAAHCwWUEGAECAA8CGwwFAlVcpi8FCRmg08MACgkQyx8mb86fmYHNRQ/+ J0OZsBYP4leJvQF8lx9zif+v4ZY/6C9tTcUv/KNAE5leyrD4IKbnV4PnbrVhjq861it/zRQW cFpWQszZyWRwNPWUUz7ejmm9lAwPbr8xWT4qMSA43VKQ7ZCeTQJ4TC8kjqtcbw41SjkjrcTG wF52zFO4bOWyovVAPncvV9eGA/vtnd3xEZXQiSt91kBSqK28yjxAqK/c3G6i7IX2rg6pzgqh hiH3/1qM2M/LSuqAv0Rwrt/k+pZXE+B4Ud42hwmMr0TfhNxG+X7YKvjKC+SjPjqp0CaztQ0H nsDLSLElVROxCd9m8CAUuHplgmR3seYCOrT4jriMFBtKNPtj2EE4DNV4s7k0Zy+6iRQ8G8ng QjsSqYJx8iAR8JRB7Gm2rQOMv8lSRdjva++GT0VLXtHULdlzg8VjDnFZ3lfz5PWEOeIMk7Rj trjv82EZtrhLuLjHRCaG50OOm0hwPSk1J64R8O3HjSLdertmw7eyAYOo4RuWJguYMg5DRnBk WkRwrSuCn7UG+qVWZeKEsFKFOkynOs3pVbcbq1pxbhk3TRWCGRU5JolI4ohy/7JV1TVbjiDI HP/aVnm6NC8of26P40Pg8EdAhajZnHHjA7FrJXsy3cyIGqvg9os4rNkUWmrCfLLsZDHD8FnU mDW4+i+XlNFUPUYMrIKi9joBhu18ssf5i5Q= Message-ID: <846b3cb0-813f-9ea1-ef80-48fdf3c7bf03@roeck-us.net> Date: Tue, 29 Sep 2020 22:36:43 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <1600669071-26235-3-git-send-email-yilun.xu@intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/20/20 11:17 PM, Xu Yilun wrote: > This patch adds hwmon functionality for Intel MAX 10 BMC chip. This BMC > chip connects to a set of sensor chips to monitor current, voltage, > thermal and power of different components on board. The BMC firmware is > responsible for sensor data sampling and recording in shared registers. > Host driver reads the sensor data from these shared registers and > exposes them to users as hwmon interfaces. > > Signed-off-by: Xu Yilun > Signed-off-by: Wu Hao > Signed-off-by: Matthew Gerlach > Signed-off-by: Tom Rix Reviewed-by: Guenter Roeck > --- > v2: add the Documentation > refactor the code, provide static hwmon_channel_info > remove Unnecessary hwmon-sysfs.h > make the sensor data table const > v3: make the data tables a pointer array indexed by hwmon_sensor_types > some minor fixes > --- > Documentation/hwmon/index.rst | 1 + > Documentation/hwmon/intel-m10-bmc-hwmon.rst | 78 +++++++ > drivers/hwmon/Kconfig | 11 + > drivers/hwmon/Makefile | 1 + > drivers/hwmon/intel-m10-bmc-hwmon.c | 334 ++++++++++++++++++++++++++++ > 5 files changed, 425 insertions(+) > create mode 100644 Documentation/hwmon/intel-m10-bmc-hwmon.rst > create mode 100644 drivers/hwmon/intel-m10-bmc-hwmon.c > > diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst > index a926f1a..4bcb1a7 100644 > --- a/Documentation/hwmon/index.rst > +++ b/Documentation/hwmon/index.rst > @@ -74,6 +74,7 @@ Hardware Monitoring Kernel Drivers > ina209 > ina2xx > ina3221 > + intel-m10-bmc-hwmon > ir35221 > ir38064 > isl68137 > diff --git a/Documentation/hwmon/intel-m10-bmc-hwmon.rst b/Documentation/hwmon/intel-m10-bmc-hwmon.rst > new file mode 100644 > index 0000000..3d148c6 > --- /dev/null > +++ b/Documentation/hwmon/intel-m10-bmc-hwmon.rst > @@ -0,0 +1,78 @@ > +.. SPDX-License-Identifier: GPL-2.0 > + > +Kernel driver intel-m10-bmc-hwmon > +================================= > + > +Supported chips: > + > + * Intel MAX 10 BMC for Intel PAC N3000 > + > + Prefix: 'n3000bmc-hwmon' > + > +Author: Xu Yilun > + > + > +Description > +----------- > + > +This driver adds the temperature, voltage, current and power reading > +support for the Intel MAX 10 Board Management Controller (BMC) chip. > +The BMC chip is integrated in some Intel Programmable Acceleration > +Cards (PAC). It connects to a set of sensor chips to monitor the > +sensor data of different components on the board. The BMC firmware is > +responsible for sensor data sampling and recording in shared > +registers. The host driver reads the sensor data from these shared > +registers and exposes them to users as hwmon interfaces. > + > +The BMC chip is implemented using the Intel MAX 10 CPLD. It could be > +reprogramed to some variants in order to support different Intel > +PACs. The driver is designed to be able to distinguish between the > +variants, but now it only supports the BMC for Intel PAC N3000. > + > + > +Sysfs attributes > +---------------- > + > +The following attributes are supported: > + > +- Intel MAX 10 BMC for Intel PAC N3000: > + > +======================= ======================================================= > +tempX_input Temperature of the component (specified by tempX_label) > +tempX_max Temperature maximum setpoint of the component > +tempX_crit Temperature critical setpoint of the component > +tempX_max_hyst Hysteresis for temperature maximum of the component > +tempX_crit_hyst Hysteresis for temperature critical of the component > +temp1_label "Board Temperature" > +temp2_label "FPGA Die Temperature" > +temp3_label "QSFP0 Temperature" > +temp4_label "QSFP1 Temperature" > +temp5_label "Retimer A Temperature" > +temp6_label "Retimer A SerDes Temperature" > +temp7_label "Retimer B Temperature" > +temp8_label "Retimer B SerDes Temperature" > + > +inX_input Measured voltage of the component (specified by > + inX_label) > +in0_label "QSFP0 Supply Voltage" > +in1_label "QSFP1 Supply Voltage" > +in2_label "FPGA Core Voltage" > +in3_label "12V Backplane Voltage" > +in4_label "1.2V Voltage" > +in5_label "12V AUX Voltage" > +in6_label "1.8V Voltage" > +in7_label "3.3V Voltage" > + > +currX_input Measured current of the component (specified by > + currX_label) > +curr1_label "FPGA Core Current" > +curr2_label "12V Backplane Current" > +curr3_label "12V AUX Current" > + > +powerX_input Measured power of the component (specified by > + powerX_label) > +power1_label "Board Power" > + > +======================= ======================================================= > + > +All the attributes are read-only. > diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig > index 8dc28b2..53af15c 100644 > --- a/drivers/hwmon/Kconfig > +++ b/drivers/hwmon/Kconfig > @@ -2064,6 +2064,17 @@ config SENSORS_XGENE > If you say yes here you get support for the temperature > and power sensors for APM X-Gene SoC. > > +config SENSORS_INTEL_M10_BMC_HWMON > + tristate "Intel MAX10 BMC Hardware Monitoring" > + depends on MFD_INTEL_M10_BMC > + help > + This driver provides support for the hardware monitoring functionality > + on Intel MAX10 BMC chip. > + > + This BMC Chip is used on Intel FPGA PCIe Acceleration Cards (PAC). Its > + sensors monitor various telemetry data of different components on the > + card, e.g. board temperature, FPGA core temperature/voltage/current. > + > if ACPI > > comment "ACPI drivers" > diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile > index a8f4b35..ba5a25a 100644 > --- a/drivers/hwmon/Makefile > +++ b/drivers/hwmon/Makefile > @@ -90,6 +90,7 @@ obj-$(CONFIG_SENSORS_IIO_HWMON) += iio_hwmon.o > obj-$(CONFIG_SENSORS_INA209) += ina209.o > obj-$(CONFIG_SENSORS_INA2XX) += ina2xx.o > obj-$(CONFIG_SENSORS_INA3221) += ina3221.o > +obj-$(CONFIG_SENSORS_INTEL_M10_BMC_HWMON) += intel-m10-bmc-hwmon.o > obj-$(CONFIG_SENSORS_IT87) += it87.o > obj-$(CONFIG_SENSORS_JC42) += jc42.o > obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o > diff --git a/drivers/hwmon/intel-m10-bmc-hwmon.c b/drivers/hwmon/intel-m10-bmc-hwmon.c > new file mode 100644 > index 0000000..17d5e6b > --- /dev/null > +++ b/drivers/hwmon/intel-m10-bmc-hwmon.c > @@ -0,0 +1,334 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Intel MAX 10 BMC HWMON Driver > + * > + * Copyright (C) 2018-2020 Intel Corporation. All rights reserved. > + * > + */ > +#include > +#include > +#include > +#include > +#include > +#include > + > +struct m10bmc_sdata { > + unsigned int reg_input; > + unsigned int reg_max; > + unsigned int reg_crit; > + unsigned int reg_hyst; > + unsigned int reg_min; > + unsigned int multiplier; > + const char *label; > +}; > + > +struct m10bmc_hwmon_board_data { > + const struct m10bmc_sdata *tables[hwmon_max]; > + const struct hwmon_channel_info **hinfo; > +}; > + > +struct m10bmc_hwmon { > + struct device *dev; > + struct hwmon_chip_info chip; > + char *hw_name; > + struct intel_m10bmc *m10bmc; > + const struct m10bmc_hwmon_board_data *bdata; > +}; > + > +static const struct m10bmc_sdata n3000bmc_temp_tbl[] = { > + { 0x100, 0x104, 0x108, 0x10c, 0x0, 500, "Board Temperature" }, > + { 0x110, 0x114, 0x118, 0x0, 0x0, 500, "FPGA Die Temperature" }, > + { 0x11c, 0x124, 0x120, 0x0, 0x0, 500, "QSFP0 Temperature" }, > + { 0x12c, 0x134, 0x130, 0x0, 0x0, 500, "QSFP1 Temperature" }, > + { 0x168, 0x0, 0x0, 0x0, 0x0, 500, "Retimer A Temperature" }, > + { 0x16c, 0x0, 0x0, 0x0, 0x0, 500, "Retimer A SerDes Temperature" }, > + { 0x170, 0x0, 0x0, 0x0, 0x0, 500, "Retimer B Temperature" }, > + { 0x174, 0x0, 0x0, 0x0, 0x0, 500, "Retimer B SerDes Temperature" }, > +}; > + > +static const struct m10bmc_sdata n3000bmc_in_tbl[] = { > + { 0x128, 0x0, 0x0, 0x0, 0x0, 1, "QSFP0 Supply Voltage" }, > + { 0x138, 0x0, 0x0, 0x0, 0x0, 1, "QSFP1 Supply Voltage" }, > + { 0x13c, 0x0, 0x0, 0x0, 0x0, 1, "FPGA Core Voltage" }, > + { 0x144, 0x0, 0x0, 0x0, 0x0, 1, "12V Backplane Voltage" }, > + { 0x14c, 0x0, 0x0, 0x0, 0x0, 1, "1.2V Voltage" }, > + { 0x150, 0x0, 0x0, 0x0, 0x0, 1, "12V AUX Voltage" }, > + { 0x158, 0x0, 0x0, 0x0, 0x0, 1, "1.8V Voltage" }, > + { 0x15c, 0x0, 0x0, 0x0, 0x0, 1, "3.3V Voltage" }, > +}; > + > +static const struct m10bmc_sdata n3000bmc_curr_tbl[] = { > + { 0x140, 0x0, 0x0, 0x0, 0x0, 1, "FPGA Core Current" }, > + { 0x148, 0x0, 0x0, 0x0, 0x0, 1, "12V Backplane Current" }, > + { 0x154, 0x0, 0x0, 0x0, 0x0, 1, "12V AUX Current" }, > +}; > + > +static const struct m10bmc_sdata n3000bmc_power_tbl[] = { > + { 0x160, 0x0, 0x0, 0x0, 0x0, 1000, "Board Power" }, > +}; > + > +static const struct hwmon_channel_info *n3000bmc_hinfo[] = { > + HWMON_CHANNEL_INFO(temp, > + HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | > + HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL, > + HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | > + HWMON_T_LABEL, > + HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | > + HWMON_T_LABEL, > + HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | > + HWMON_T_LABEL, > + HWMON_T_INPUT | HWMON_T_LABEL, > + HWMON_T_INPUT | HWMON_T_LABEL, > + HWMON_T_INPUT | HWMON_T_LABEL, > + HWMON_T_INPUT | HWMON_T_LABEL), > + HWMON_CHANNEL_INFO(in, > + HWMON_I_INPUT | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_LABEL), > + HWMON_CHANNEL_INFO(curr, > + HWMON_C_INPUT | HWMON_C_LABEL, > + HWMON_C_INPUT | HWMON_C_LABEL, > + HWMON_C_INPUT | HWMON_C_LABEL), > + HWMON_CHANNEL_INFO(power, > + HWMON_P_INPUT | HWMON_P_LABEL), > + NULL > +}; > + > +static const struct m10bmc_hwmon_board_data n3000bmc_hwmon_bdata = { > + .tables = { > + [hwmon_temp] = n3000bmc_temp_tbl, > + [hwmon_in] = n3000bmc_in_tbl, > + [hwmon_curr] = n3000bmc_curr_tbl, > + [hwmon_power] = n3000bmc_power_tbl, > + }, > + > + .hinfo = n3000bmc_hinfo, > +}; > + > +static umode_t > +m10bmc_hwmon_is_visible(const void *data, enum hwmon_sensor_types type, > + u32 attr, int channel) > +{ > + return 0444; > +} > + > +static const struct m10bmc_sdata * > +find_sensor_data(struct m10bmc_hwmon *hw, enum hwmon_sensor_types type, > + int channel) > +{ > + const struct m10bmc_sdata *tbl; > + > + tbl = hw->bdata->tables[type]; > + if (!tbl) > + return ERR_PTR(-EOPNOTSUPP); > + > + return &tbl[channel]; > +} > + > +static int do_sensor_read(struct m10bmc_hwmon *hw, > + const struct m10bmc_sdata *data, > + unsigned int regoff, long *val) > +{ > + unsigned int regval; > + int ret; > + > + ret = m10bmc_sys_read(hw->m10bmc, regoff, ®val); > + if (ret) > + return ret; > + > + /* > + * BMC Firmware will return 0xdeadbeef if the sensor value is invalid > + * at that time. This usually happens on sensor channels which connect > + * to external pluggable modules, e.g. QSFP temperature and voltage. > + * When the QSFP is unplugged from cage, driver will get 0xdeadbeef > + * from their registers. > + */ > + if (regval == 0xdeadbeef) > + return -ENODATA; > + > + *val = regval * data->multiplier; > + > + return 0; > +} > + > +static int m10bmc_hwmon_read(struct device *dev, enum hwmon_sensor_types type, > + u32 attr, int channel, long *val) > +{ > + struct m10bmc_hwmon *hw = dev_get_drvdata(dev); > + unsigned int reg = 0, reg_hyst = 0; > + const struct m10bmc_sdata *data; > + long hyst, value; > + int ret; > + > + data = find_sensor_data(hw, type, channel); > + if (IS_ERR(data)) > + return PTR_ERR(data); > + > + switch (type) { > + case hwmon_temp: > + switch (attr) { > + case hwmon_temp_input: > + reg = data->reg_input; > + break; > + case hwmon_temp_max_hyst: > + reg_hyst = data->reg_hyst; > + fallthrough; > + case hwmon_temp_max: > + reg = data->reg_max; > + break; > + case hwmon_temp_crit_hyst: > + reg_hyst = data->reg_hyst; > + fallthrough; > + case hwmon_temp_crit: > + reg = data->reg_crit; > + break; > + default: > + return -EOPNOTSUPP; > + } > + break; > + case hwmon_in: > + switch (attr) { > + case hwmon_in_input: > + reg = data->reg_input; > + break; > + case hwmon_in_max: > + reg = data->reg_max; > + break; > + case hwmon_in_crit: > + reg = data->reg_crit; > + break; > + case hwmon_in_min: > + reg = data->reg_min; > + break; > + default: > + return -EOPNOTSUPP; > + } > + break; > + case hwmon_curr: > + switch (attr) { > + case hwmon_curr_input: > + reg = data->reg_input; > + break; > + case hwmon_curr_max: > + reg = data->reg_max; > + break; > + case hwmon_curr_crit: > + reg = data->reg_crit; > + break; > + default: > + return -EOPNOTSUPP; > + } > + break; > + case hwmon_power: > + switch (attr) { > + case hwmon_power_input: > + reg = data->reg_input; > + break; > + default: > + return -EOPNOTSUPP; > + } > + break; > + default: > + return -EOPNOTSUPP; > + } > + > + if (!reg) > + return -EOPNOTSUPP; > + > + ret = do_sensor_read(hw, data, reg, &value); > + if (ret) > + return ret; > + > + if (reg_hyst) { > + ret = do_sensor_read(hw, data, reg_hyst, &hyst); > + if (ret) > + return ret; > + > + value -= hyst; > + } > + > + *val = value; > + > + return 0; > +} > + > +static int m10bmc_hwmon_read_string(struct device *dev, > + enum hwmon_sensor_types type, > + u32 attr, int channel, const char **str) > +{ > + struct m10bmc_hwmon *hw = dev_get_drvdata(dev); > + const struct m10bmc_sdata *data; > + > + data = find_sensor_data(hw, type, channel); > + if (IS_ERR(data)) > + return PTR_ERR(data); > + > + *str = data->label; > + > + return 0; > +} > + > +static const struct hwmon_ops m10bmc_hwmon_ops = { > + .is_visible = m10bmc_hwmon_is_visible, > + .read = m10bmc_hwmon_read, > + .read_string = m10bmc_hwmon_read_string, > +}; > + > +static int m10bmc_hwmon_probe(struct platform_device *pdev) > +{ > + const struct platform_device_id *id = platform_get_device_id(pdev); > + struct intel_m10bmc *m10bmc = dev_get_drvdata(pdev->dev.parent); > + struct device *hwmon_dev, *dev = &pdev->dev; > + struct m10bmc_hwmon *hw; > + int i; > + > + hw = devm_kzalloc(dev, sizeof(*hw), GFP_KERNEL); > + if (!hw) > + return -ENOMEM; > + > + hw->dev = dev; > + hw->m10bmc = m10bmc; > + hw->bdata = (const struct m10bmc_hwmon_board_data *)id->driver_data; > + > + hw->chip.info = hw->bdata->hinfo; > + hw->chip.ops = &m10bmc_hwmon_ops; > + > + hw->hw_name = devm_kstrdup(dev, id->name, GFP_KERNEL); > + if (!hw->hw_name) > + return -ENOMEM; > + > + for (i = 0; hw->hw_name[i]; i++) > + if (hwmon_is_bad_char(hw->hw_name[i])) > + hw->hw_name[i] = '_'; > + > + hwmon_dev = devm_hwmon_device_register_with_info(dev, hw->hw_name, > + hw, &hw->chip, NULL); > + return PTR_ERR_OR_ZERO(hwmon_dev); > +} > + > +static const struct platform_device_id intel_m10bmc_hwmon_ids[] = { > + { > + .name = "n3000bmc-hwmon", > + .driver_data = (unsigned long)&n3000bmc_hwmon_bdata, > + }, > + { } > +}; > + > +static struct platform_driver intel_m10bmc_hwmon_driver = { > + .probe = m10bmc_hwmon_probe, > + .driver = { > + .name = "intel-m10-bmc-hwmon", > + }, > + .id_table = intel_m10bmc_hwmon_ids, > +}; > +module_platform_driver(intel_m10bmc_hwmon_driver); > + > +MODULE_DEVICE_TABLE(platform, intel_m10bmc_hwmon_ids); > +MODULE_AUTHOR("Intel Corporation"); > +MODULE_DESCRIPTION("Intel MAX 10 BMC hardware monitor"); > +MODULE_LICENSE("GPL"); >