soc: qcom: cmd-db: adjust probe for U-Boot
Integrate cmd-db into the U-Boot driver model.
This is just a wrapper around an in-memory database, so we just need to
get the address and validate that cmd-db is there.
Since cmd_db_header will be stored in the .data section we can skip
bind if it's already set.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/drivers/soc/qcom/cmd-db.c b/drivers/soc/qcom/cmd-db.c
index 4317310..f707aed 100644
--- a/drivers/soc/qcom/cmd-db.c
+++ b/drivers/soc/qcom/cmd-db.c
@@ -106,7 +106,7 @@
return memcmp(magic, CMD_DB_MAGIC, ARRAY_SIZE(CMD_DB_MAGIC)) == 0;
}
-static struct cmd_db_header *cmd_db_header;
+static struct cmd_db_header *cmd_db_header __section(".data") = NULL;
static inline const void *rsc_to_entry_header(const struct rsc_hdr *hdr)
{
@@ -124,22 +124,6 @@
return cmd_db_header->data + offset + loffset;
}
-/**
- * cmd_db_ready - Indicates if command DB is available
- *
- * Return: 0 on success, errno otherwise
- */
-int cmd_db_ready(void)
-{
- if (cmd_db_header == NULL)
- return -EPROBE_DEFER;
- else if (!cmd_db_magic_matches(cmd_db_header))
- return -EINVAL;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(cmd_db_ready);
-
static int cmd_db_get_header(const char *id, const struct entry_header **eh,
const struct rsc_hdr **rh)
{
@@ -195,54 +179,44 @@
}
EXPORT_SYMBOL_GPL(cmd_db_read_addr);
-static int cmd_db_dev_probe(struct platform_device *pdev)
+int cmd_db_bind(struct udevice *dev)
{
- struct reserved_mem *rmem;
- int ret = 0;
+ void __iomem *base;
+ ofnode node;
- rmem = of_reserved_mem_lookup(pdev->dev.of_node);
- if (!rmem) {
- dev_err(&pdev->dev, "failed to acquire memory region\n");
- return -EINVAL;
- }
+ if (cmd_db_header)
+ return 0;
- cmd_db_header = memremap(rmem->base, rmem->size, MEMREMAP_WB);
- if (!cmd_db_header) {
- ret = -ENOMEM;
- cmd_db_header = NULL;
- return ret;
+ node = dev_ofnode(dev);
+
+ debug("%s(%s)\n", __func__, ofnode_get_name(node));
+
+ base = (void __iomem *)ofnode_get_addr(node);
+ if ((fdt_addr_t)base == FDT_ADDR_T_NONE) {
+ log_err("%s: Failed to read base address\n", __func__);
+ return -ENOENT;
}
+ cmd_db_header = base;
if (!cmd_db_magic_matches(cmd_db_header)) {
- dev_err(&pdev->dev, "Invalid Command DB Magic\n");
+ log_err("%s: Invalid Command DB Magic\n", __func__);
return -EINVAL;
}
- device_set_pm_not_required(&pdev->dev);
-
return 0;
}
-static const struct of_device_id cmd_db_match_table[] = {
+static const struct udevice_id cmd_db_ids[] = {
{ .compatible = "qcom,cmd-db" },
{ }
};
-MODULE_DEVICE_TABLE(of, cmd_db_match_table);
-static struct platform_driver cmd_db_dev_driver = {
- .probe = cmd_db_dev_probe,
- .driver = {
- .name = "cmd-db",
- .of_match_table = cmd_db_match_table,
- .suppress_bind_attrs = true,
- },
+U_BOOT_DRIVER(qcom_cmd_db) = {
+ .name = "qcom_cmd_db",
+ .id = UCLASS_MISC,
+ .probe = cmd_db_bind,
+ .of_match = cmd_db_ids,
};
-static int __init cmd_db_device_init(void)
-{
- return platform_driver_register(&cmd_db_dev_driver);
-}
-core_initcall(cmd_db_device_init);
-
MODULE_DESCRIPTION("Qualcomm Technologies, Inc. Command DB Driver");
MODULE_LICENSE("GPL v2");