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237 lines
5.8 KiB
237 lines
5.8 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Intel MAX 10 Board Management Controller chip |
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* |
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* Copyright (C) 2018-2020 Intel Corporation. All rights reserved. |
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*/ |
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#include <linux/bitfield.h> |
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#include <linux/init.h> |
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#include <linux/mfd/core.h> |
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#include <linux/mfd/intel-m10-bmc.h> |
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#include <linux/module.h> |
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#include <linux/mutex.h> |
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#include <linux/regmap.h> |
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#include <linux/spi/spi.h> |
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enum m10bmc_type { |
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M10_N3000, |
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M10_D5005, |
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M10_N5010, |
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}; |
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static struct mfd_cell m10bmc_d5005_subdevs[] = { |
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{ .name = "d5005bmc-hwmon" }, |
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}; |
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static struct mfd_cell m10bmc_pacn3000_subdevs[] = { |
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{ .name = "n3000bmc-hwmon" }, |
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{ .name = "n3000bmc-retimer" }, |
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{ .name = "n3000bmc-secure" }, |
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}; |
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static struct mfd_cell m10bmc_n5010_subdevs[] = { |
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{ .name = "n5010bmc-hwmon" }, |
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}; |
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static const struct regmap_range m10bmc_regmap_range[] = { |
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regmap_reg_range(M10BMC_LEGACY_BUILD_VER, M10BMC_LEGACY_BUILD_VER), |
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regmap_reg_range(M10BMC_SYS_BASE, M10BMC_SYS_END), |
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regmap_reg_range(M10BMC_FLASH_BASE, M10BMC_FLASH_END), |
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}; |
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static const struct regmap_access_table m10bmc_access_table = { |
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.yes_ranges = m10bmc_regmap_range, |
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.n_yes_ranges = ARRAY_SIZE(m10bmc_regmap_range), |
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}; |
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static struct regmap_config intel_m10bmc_regmap_config = { |
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.reg_bits = 32, |
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.val_bits = 32, |
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.reg_stride = 4, |
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.wr_table = &m10bmc_access_table, |
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.rd_table = &m10bmc_access_table, |
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.max_register = M10BMC_MEM_END, |
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}; |
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static ssize_t bmc_version_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct intel_m10bmc *ddata = dev_get_drvdata(dev); |
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unsigned int val; |
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int ret; |
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ret = m10bmc_sys_read(ddata, M10BMC_BUILD_VER, &val); |
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if (ret) |
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return ret; |
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return sprintf(buf, "0x%x\n", val); |
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} |
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static DEVICE_ATTR_RO(bmc_version); |
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static ssize_t bmcfw_version_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct intel_m10bmc *ddata = dev_get_drvdata(dev); |
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unsigned int val; |
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int ret; |
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ret = m10bmc_sys_read(ddata, NIOS2_FW_VERSION, &val); |
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if (ret) |
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return ret; |
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return sprintf(buf, "0x%x\n", val); |
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} |
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static DEVICE_ATTR_RO(bmcfw_version); |
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static ssize_t mac_address_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct intel_m10bmc *max10 = dev_get_drvdata(dev); |
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unsigned int macaddr_low, macaddr_high; |
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int ret; |
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ret = m10bmc_sys_read(max10, M10BMC_MAC_LOW, &macaddr_low); |
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if (ret) |
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return ret; |
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ret = m10bmc_sys_read(max10, M10BMC_MAC_HIGH, &macaddr_high); |
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if (ret) |
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return ret; |
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return sysfs_emit(buf, "%02x:%02x:%02x:%02x:%02x:%02x\n", |
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(u8)FIELD_GET(M10BMC_MAC_BYTE1, macaddr_low), |
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(u8)FIELD_GET(M10BMC_MAC_BYTE2, macaddr_low), |
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(u8)FIELD_GET(M10BMC_MAC_BYTE3, macaddr_low), |
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(u8)FIELD_GET(M10BMC_MAC_BYTE4, macaddr_low), |
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(u8)FIELD_GET(M10BMC_MAC_BYTE5, macaddr_high), |
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(u8)FIELD_GET(M10BMC_MAC_BYTE6, macaddr_high)); |
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} |
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static DEVICE_ATTR_RO(mac_address); |
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static ssize_t mac_count_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct intel_m10bmc *max10 = dev_get_drvdata(dev); |
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unsigned int macaddr_high; |
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int ret; |
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ret = m10bmc_sys_read(max10, M10BMC_MAC_HIGH, &macaddr_high); |
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if (ret) |
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return ret; |
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return sysfs_emit(buf, "%u\n", |
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(u8)FIELD_GET(M10BMC_MAC_COUNT, macaddr_high)); |
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} |
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static DEVICE_ATTR_RO(mac_count); |
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static struct attribute *m10bmc_attrs[] = { |
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&dev_attr_bmc_version.attr, |
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&dev_attr_bmcfw_version.attr, |
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&dev_attr_mac_address.attr, |
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&dev_attr_mac_count.attr, |
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NULL, |
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}; |
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ATTRIBUTE_GROUPS(m10bmc); |
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static int check_m10bmc_version(struct intel_m10bmc *ddata) |
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{ |
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unsigned int v; |
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int ret; |
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/* |
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* This check is to filter out the very old legacy BMC versions. In the |
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* old BMC chips, the BMC version info is stored in the old version |
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* register (M10BMC_LEGACY_BUILD_VER), so its read out value would have |
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* not been M10BMC_VER_LEGACY_INVALID (0xffffffff). But in new BMC |
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* chips that the driver supports, the value of this register should be |
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* M10BMC_VER_LEGACY_INVALID. |
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*/ |
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ret = m10bmc_raw_read(ddata, M10BMC_LEGACY_BUILD_VER, &v); |
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if (ret) |
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return -ENODEV; |
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if (v != M10BMC_VER_LEGACY_INVALID) { |
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dev_err(ddata->dev, "bad version M10BMC detected\n"); |
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return -ENODEV; |
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} |
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return 0; |
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} |
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static int intel_m10_bmc_spi_probe(struct spi_device *spi) |
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{ |
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const struct spi_device_id *id = spi_get_device_id(spi); |
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struct device *dev = &spi->dev; |
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struct mfd_cell *cells; |
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struct intel_m10bmc *ddata; |
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int ret, n_cell; |
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ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL); |
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if (!ddata) |
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return -ENOMEM; |
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ddata->dev = dev; |
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ddata->regmap = |
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devm_regmap_init_spi_avmm(spi, &intel_m10bmc_regmap_config); |
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if (IS_ERR(ddata->regmap)) { |
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ret = PTR_ERR(ddata->regmap); |
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dev_err(dev, "Failed to allocate regmap: %d\n", ret); |
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return ret; |
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} |
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spi_set_drvdata(spi, ddata); |
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ret = check_m10bmc_version(ddata); |
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if (ret) { |
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dev_err(dev, "Failed to identify m10bmc hardware\n"); |
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return ret; |
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} |
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switch (id->driver_data) { |
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case M10_N3000: |
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cells = m10bmc_pacn3000_subdevs; |
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n_cell = ARRAY_SIZE(m10bmc_pacn3000_subdevs); |
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break; |
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case M10_D5005: |
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cells = m10bmc_d5005_subdevs; |
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n_cell = ARRAY_SIZE(m10bmc_d5005_subdevs); |
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break; |
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case M10_N5010: |
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cells = m10bmc_n5010_subdevs; |
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n_cell = ARRAY_SIZE(m10bmc_n5010_subdevs); |
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break; |
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default: |
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return -ENODEV; |
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} |
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ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, cells, n_cell, |
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NULL, 0, NULL); |
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if (ret) |
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dev_err(dev, "Failed to register sub-devices: %d\n", ret); |
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return ret; |
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} |
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static const struct spi_device_id m10bmc_spi_id[] = { |
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{ "m10-n3000", M10_N3000 }, |
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{ "m10-d5005", M10_D5005 }, |
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{ "m10-n5010", M10_N5010 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(spi, m10bmc_spi_id); |
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static struct spi_driver intel_m10bmc_spi_driver = { |
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.driver = { |
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.name = "intel-m10-bmc", |
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.dev_groups = m10bmc_groups, |
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}, |
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.probe = intel_m10_bmc_spi_probe, |
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.id_table = m10bmc_spi_id, |
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}; |
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module_spi_driver(intel_m10bmc_spi_driver); |
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MODULE_DESCRIPTION("Intel MAX 10 BMC Device Driver"); |
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MODULE_AUTHOR("Intel Corporation"); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_ALIAS("spi:intel-m10-bmc");
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