diff options
| -rw-r--r-- | drivers/hwmon/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/hwmon/Makefile | 1 | ||||
| -rw-r--r-- | drivers/hwmon/occ/Kconfig | 31 | ||||
| -rw-r--r-- | drivers/hwmon/occ/Makefile | 5 | ||||
| -rw-r--r-- | drivers/hwmon/occ/common.c | 40 | ||||
| -rw-r--r-- | drivers/hwmon/occ/common.h | 34 | ||||
| -rw-r--r-- | drivers/hwmon/occ/p8_i2c.c | 61 | ||||
| -rw-r--r-- | drivers/hwmon/occ/p9_sbe.c | 68 |
8 files changed, 242 insertions, 0 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 81da17a42dc9..e3bef55451ae 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1293,6 +1293,8 @@ config SENSORS_NSA320 This driver can also be built as a module. If so, the module will be called nsa320-hwmon. +source "drivers/hwmon/occ/Kconfig" + config SENSORS_PCF8591 tristate "Philips PCF8591 ADC/DAC" depends on I2C diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 93f7f41ea4ad..f5c7b442e69e 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -178,6 +178,7 @@ obj-$(CONFIG_SENSORS_WM831X) += wm831x-hwmon.o obj-$(CONFIG_SENSORS_WM8350) += wm8350-hwmon.o obj-$(CONFIG_SENSORS_XGENE) += xgene-hwmon.o +obj-$(CONFIG_SENSORS_OCC) += occ/ obj-$(CONFIG_PMBUS) += pmbus/ ccflags-$(CONFIG_HWMON_DEBUG_CHIP) := -DDEBUG diff --git a/drivers/hwmon/occ/Kconfig b/drivers/hwmon/occ/Kconfig new file mode 100644 index 000000000000..66686628fb53 --- /dev/null +++ b/drivers/hwmon/occ/Kconfig @@ -0,0 +1,31 @@ +# +# On-Chip Controller configuration +# + +config SENSORS_OCC_P8_I2C + tristate "POWER8 OCC through I2C" + depends on I2C + select SENSORS_OCC + help + This option enables support for monitoring sensors provided by the + On-Chip Controller (OCC) on a POWER8 processor. Communications with + the OCC are established through I2C bus. + + This driver can also be built as a module. If so, the module will be + called occ-p8-hwmon. + +config SENSORS_OCC_P9_SBE + tristate "POWER9 OCC through SBE" + depends on FSI_OCC + select SENSORS_OCC + help + This option enables support for monitoring sensors provided by the + On-Chip Controller (OCC) on a POWER9 processor. Communications with + the OCC are established through SBE fifo on an FSI bus. + + This driver can also be built as a module. If so, the module will be + called occ-p9-hwmon. + +config SENSORS_OCC + bool "POWER On-Chip Controller" + depends on SENSORS_OCC_P8_I2C || SENSORS_OCC_P9_SBE diff --git a/drivers/hwmon/occ/Makefile b/drivers/hwmon/occ/Makefile new file mode 100644 index 000000000000..57c0e911005b --- /dev/null +++ b/drivers/hwmon/occ/Makefile @@ -0,0 +1,5 @@ +occ-p8-hwmon-objs := common.o p8_i2c.o +occ-p9-hwmon-objs := common.o p9_sbe.o + +obj-$(CONFIG_SENSORS_OCC_P8_I2C) += occ-p8-hwmon.o +obj-$(CONFIG_SENSORS_OCC_P9_SBE) += occ-p9-hwmon.o diff --git a/drivers/hwmon/occ/common.c b/drivers/hwmon/occ/common.c new file mode 100644 index 000000000000..81acd4b5020d --- /dev/null +++ b/drivers/hwmon/occ/common.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <linux/device.h> + +#include "common.h" + +static int occ_poll(struct occ *occ) +{ + u16 checksum = occ->poll_cmd_data + 1; + u8 cmd[8]; + + /* big endian */ + cmd[0] = 0; /* sequence number */ + cmd[1] = 0; /* cmd type */ + cmd[2] = 0; /* data length msb */ + cmd[3] = 1; /* data length lsb */ + cmd[4] = occ->poll_cmd_data; /* data */ + cmd[5] = checksum >> 8; /* checksum msb */ + cmd[6] = checksum & 0xFF; /* checksum lsb */ + cmd[7] = 0; + + return occ->send_cmd(occ, cmd); +} + +int occ_setup(struct occ *occ, const char *name) +{ + int rc; + + rc = occ_poll(occ); + if (rc == -ESHUTDOWN) { + dev_info(occ->bus_dev, "host is not ready\n"); + return rc; + } else if (rc < 0) { + dev_err(occ->bus_dev, "failed to get OCC poll response: %d\n", + rc); + return rc; + } + + return 0; +} diff --git a/drivers/hwmon/occ/common.h b/drivers/hwmon/occ/common.h new file mode 100644 index 000000000000..0602196d6704 --- /dev/null +++ b/drivers/hwmon/occ/common.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef OCC_COMMON_H +#define OCC_COMMON_H + +struct device; + +#define OCC_RESP_DATA_BYTES 4089 + +/* + * Same response format for all OCC versions. + * Allocate the largest possible response. + */ +struct occ_response { + u8 seq_no; + u8 cmd_type; + u8 return_status; + __be16 data_length; + u8 data[OCC_RESP_DATA_BYTES]; + __be16 checksum; +} __packed; + +struct occ { + struct device *bus_dev; + + struct occ_response resp; + + u8 poll_cmd_data; /* to perform OCC poll command */ + int (*send_cmd)(struct occ *occ, u8 *cmd); +}; + +int occ_setup(struct occ *occ, const char *name); + +#endif /* OCC_COMMON_H */ diff --git a/drivers/hwmon/occ/p8_i2c.c b/drivers/hwmon/occ/p8_i2c.c new file mode 100644 index 000000000000..4f3937dec480 --- /dev/null +++ b/drivers/hwmon/occ/p8_i2c.c @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <linux/device.h> +#include <linux/errno.h> +#include <linux/i2c.h> +#include <linux/module.h> + +#include "common.h" + +struct p8_i2c_occ { + struct occ occ; + struct i2c_client *client; +}; + +#define to_p8_i2c_occ(x) container_of((x), struct p8_i2c_occ, occ) + +static int p8_i2c_occ_send_cmd(struct occ *occ, u8 *cmd) +{ + return -EOPNOTSUPP; +} + +static int p8_i2c_occ_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct occ *occ; + struct p8_i2c_occ *ctx = devm_kzalloc(&client->dev, sizeof(*ctx), + GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->client = client; + occ = &ctx->occ; + occ->bus_dev = &client->dev; + dev_set_drvdata(&client->dev, occ); + + occ->poll_cmd_data = 0x10; /* P8 OCC poll data */ + occ->send_cmd = p8_i2c_occ_send_cmd; + + return occ_setup(occ, "p8_occ"); +} + +static const struct of_device_id p8_i2c_occ_of_match[] = { + { .compatible = "ibm,p8-occ-hwmon" }, + {} +}; +MODULE_DEVICE_TABLE(of, p8_i2c_occ_of_match); + +static struct i2c_driver p8_i2c_occ_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "occ-hwmon", + .of_match_table = p8_i2c_occ_of_match, + }, + .probe = p8_i2c_occ_probe, +}; + +module_i2c_driver(p8_i2c_occ_driver); + +MODULE_AUTHOR("Eddie James <eajames@linux.ibm.com>"); +MODULE_DESCRIPTION("BMC P8 OCC hwmon driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/hwmon/occ/p9_sbe.c b/drivers/hwmon/occ/p9_sbe.c new file mode 100644 index 000000000000..c2fa34e30544 --- /dev/null +++ b/drivers/hwmon/occ/p9_sbe.c @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <linux/device.h> +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include "common.h" + +struct p9_sbe_occ { + struct occ occ; + struct device *sbe; +}; + +#define to_p9_sbe_occ(x) container_of((x), struct p9_sbe_occ, occ) + +static int p9_sbe_occ_send_cmd(struct occ *occ, u8 *cmd) +{ + return -EOPNOTSUPP; +} + +static int p9_sbe_occ_probe(struct platform_device *pdev) +{ + int rc; + struct occ *occ; + struct p9_sbe_occ *ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), + GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->sbe = pdev->dev.parent; + occ = &ctx->occ; + occ->bus_dev = &pdev->dev; + platform_set_drvdata(pdev, occ); + + occ->poll_cmd_data = 0x20; /* P9 OCC poll data */ + occ->send_cmd = p9_sbe_occ_send_cmd; + + rc = occ_setup(occ, "p9_occ"); + if (rc == -ESHUTDOWN) + rc = -ENODEV; /* Host is shutdown, don't spew errors */ + + return rc; +} + +static int p9_sbe_occ_remove(struct platform_device *pdev) +{ + struct occ *occ = platform_get_drvdata(pdev); + struct p9_sbe_occ *ctx = to_p9_sbe_occ(occ); + + ctx->sbe = NULL; + + return 0; +} + +static struct platform_driver p9_sbe_occ_driver = { + .driver = { + .name = "occ-hwmon", + }, + .probe = p9_sbe_occ_probe, + .remove = p9_sbe_occ_remove, +}; + +module_platform_driver(p9_sbe_occ_driver); + +MODULE_AUTHOR("Eddie James <eajames@linux.ibm.com>"); +MODULE_DESCRIPTION("BMC P9 OCC hwmon driver"); +MODULE_LICENSE("GPL"); |