diff options
Diffstat (limited to 'target/linux/generic/backport-5.10/814-v6.4-0010-nvmem-layouts-sl28vpd-Add-new-layout-driver.patch')
| -rw-r--r-- | target/linux/generic/backport-5.10/814-v6.4-0010-nvmem-layouts-sl28vpd-Add-new-layout-driver.patch | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/target/linux/generic/backport-5.10/814-v6.4-0010-nvmem-layouts-sl28vpd-Add-new-layout-driver.patch b/target/linux/generic/backport-5.10/814-v6.4-0010-nvmem-layouts-sl28vpd-Add-new-layout-driver.patch deleted file mode 100644 index 7d97658b60..0000000000 --- a/target/linux/generic/backport-5.10/814-v6.4-0010-nvmem-layouts-sl28vpd-Add-new-layout-driver.patch +++ /dev/null @@ -1,215 +0,0 @@ -From d9fae023fe86069750092fc1c2f3a73e2fb18512 Mon Sep 17 00:00:00 2001 -From: Michael Walle <michael@walle.cc> -Date: Tue, 4 Apr 2023 18:21:29 +0100 -Subject: [PATCH] nvmem: layouts: sl28vpd: Add new layout driver - -This layout applies to the VPD of the Kontron sl28 boards. The VPD only -contains a base MAC address. Therefore, we have to add an individual -offset to it. This is done by taking the second argument of the nvmem -phandle into account. Also this let us checking the VPD version and the -checksum. - -Signed-off-by: Michael Walle <michael@walle.cc> -Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> -Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> -Link: https://lore.kernel.org/r/20230404172148.82422-22-srinivas.kandagatla@linaro.org -Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> ---- - drivers/nvmem/layouts/Kconfig | 9 ++ - drivers/nvmem/layouts/Makefile | 2 + - drivers/nvmem/layouts/sl28vpd.c | 165 ++++++++++++++++++++++++++++++++ - 3 files changed, 176 insertions(+) - create mode 100644 drivers/nvmem/layouts/sl28vpd.c - ---- a/drivers/nvmem/layouts/Kconfig -+++ b/drivers/nvmem/layouts/Kconfig -@@ -2,4 +2,13 @@ - - menu "Layout Types" - -+config NVMEM_LAYOUT_SL28_VPD -+ tristate "Kontron sl28 VPD layout support" -+ select CRC8 -+ help -+ Say Y here if you want to support the VPD layout of the Kontron -+ SMARC-sAL28 boards. -+ -+ If unsure, say N. -+ - endmenu ---- a/drivers/nvmem/layouts/Makefile -+++ b/drivers/nvmem/layouts/Makefile -@@ -2,3 +2,5 @@ - # - # Makefile for nvmem layouts. - # -+ -+obj-$(CONFIG_NVMEM_LAYOUT_SL28_VPD) += sl28vpd.o ---- /dev/null -+++ b/drivers/nvmem/layouts/sl28vpd.c -@@ -0,0 +1,165 @@ -+// SPDX-License-Identifier: GPL-2.0 -+ -+#include <linux/crc8.h> -+#include <linux/etherdevice.h> -+#include <linux/nvmem-consumer.h> -+#include <linux/nvmem-provider.h> -+#include <linux/of.h> -+#include <uapi/linux/if_ether.h> -+ -+#define SL28VPD_MAGIC 'V' -+ -+struct sl28vpd_header { -+ u8 magic; -+ u8 version; -+} __packed; -+ -+struct sl28vpd_v1 { -+ struct sl28vpd_header header; -+ char serial_number[15]; -+ u8 base_mac_address[ETH_ALEN]; -+ u8 crc8; -+} __packed; -+ -+static int sl28vpd_mac_address_pp(void *priv, const char *id, int index, -+ unsigned int offset, void *buf, -+ size_t bytes) -+{ -+ if (bytes != ETH_ALEN) -+ return -EINVAL; -+ -+ if (index < 0) -+ return -EINVAL; -+ -+ if (!is_valid_ether_addr(buf)) -+ return -EINVAL; -+ -+ eth_addr_add(buf, index); -+ -+ return 0; -+} -+ -+static const struct nvmem_cell_info sl28vpd_v1_entries[] = { -+ { -+ .name = "serial-number", -+ .offset = offsetof(struct sl28vpd_v1, serial_number), -+ .bytes = sizeof_field(struct sl28vpd_v1, serial_number), -+ }, -+ { -+ .name = "base-mac-address", -+ .offset = offsetof(struct sl28vpd_v1, base_mac_address), -+ .bytes = sizeof_field(struct sl28vpd_v1, base_mac_address), -+ .read_post_process = sl28vpd_mac_address_pp, -+ }, -+}; -+ -+static int sl28vpd_v1_check_crc(struct device *dev, struct nvmem_device *nvmem) -+{ -+ struct sl28vpd_v1 data_v1; -+ u8 table[CRC8_TABLE_SIZE]; -+ int ret; -+ u8 crc; -+ -+ crc8_populate_msb(table, 0x07); -+ -+ ret = nvmem_device_read(nvmem, 0, sizeof(data_v1), &data_v1); -+ if (ret < 0) -+ return ret; -+ else if (ret != sizeof(data_v1)) -+ return -EIO; -+ -+ crc = crc8(table, (void *)&data_v1, sizeof(data_v1) - 1, 0); -+ -+ if (crc != data_v1.crc8) { -+ dev_err(dev, -+ "Checksum is invalid (got %02x, expected %02x).\n", -+ crc, data_v1.crc8); -+ return -EINVAL; -+ } -+ -+ return 0; -+} -+ -+static int sl28vpd_add_cells(struct device *dev, struct nvmem_device *nvmem, -+ struct nvmem_layout *layout) -+{ -+ const struct nvmem_cell_info *pinfo; -+ struct nvmem_cell_info info = {0}; -+ struct device_node *layout_np; -+ struct sl28vpd_header hdr; -+ int ret, i; -+ -+ /* check header */ -+ ret = nvmem_device_read(nvmem, 0, sizeof(hdr), &hdr); -+ if (ret < 0) -+ return ret; -+ else if (ret != sizeof(hdr)) -+ return -EIO; -+ -+ if (hdr.magic != SL28VPD_MAGIC) { -+ dev_err(dev, "Invalid magic value (%02x)\n", hdr.magic); -+ return -EINVAL; -+ } -+ -+ if (hdr.version != 1) { -+ dev_err(dev, "Version %d is unsupported.\n", hdr.version); -+ return -EINVAL; -+ } -+ -+ ret = sl28vpd_v1_check_crc(dev, nvmem); -+ if (ret) -+ return ret; -+ -+ layout_np = of_nvmem_layout_get_container(nvmem); -+ if (!layout_np) -+ return -ENOENT; -+ -+ for (i = 0; i < ARRAY_SIZE(sl28vpd_v1_entries); i++) { -+ pinfo = &sl28vpd_v1_entries[i]; -+ -+ info.name = pinfo->name; -+ info.offset = pinfo->offset; -+ info.bytes = pinfo->bytes; -+ info.read_post_process = pinfo->read_post_process; -+ info.np = of_get_child_by_name(layout_np, pinfo->name); -+ -+ ret = nvmem_add_one_cell(nvmem, &info); -+ if (ret) { -+ of_node_put(layout_np); -+ return ret; -+ } -+ } -+ -+ of_node_put(layout_np); -+ -+ return 0; -+} -+ -+static const struct of_device_id sl28vpd_of_match_table[] = { -+ { .compatible = "kontron,sl28-vpd" }, -+ {}, -+}; -+MODULE_DEVICE_TABLE(of, sl28vpd_of_match_table); -+ -+struct nvmem_layout sl28vpd_layout = { -+ .name = "sl28-vpd", -+ .of_match_table = sl28vpd_of_match_table, -+ .add_cells = sl28vpd_add_cells, -+}; -+ -+static int __init sl28vpd_init(void) -+{ -+ return nvmem_layout_register(&sl28vpd_layout); -+} -+ -+static void __exit sl28vpd_exit(void) -+{ -+ nvmem_layout_unregister(&sl28vpd_layout); -+} -+ -+module_init(sl28vpd_init); -+module_exit(sl28vpd_exit); -+ -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("Michael Walle <michael@walle.cc>"); -+MODULE_DESCRIPTION("NVMEM layout driver for the VPD of Kontron sl28 boards"); |