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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * UART support for U-Boot when launched from Coreboot
- *
- * Copyright 2019 Google LLC
- */
- #include <common.h>
- #include <dm.h>
- #include <ns16550.h>
- #include <serial.h>
- #include <asm/arch/sysinfo.h>
- static int coreboot_ofdata_to_platdata(struct udevice *dev)
- {
- struct ns16550_platdata *plat = dev_get_platdata(dev);
- struct cb_serial *cb_info = lib_sysinfo.serial;
- plat->base = cb_info->baseaddr;
- plat->reg_shift = cb_info->regwidth == 4 ? 2 : 0;
- plat->reg_width = cb_info->regwidth;
- plat->clock = cb_info->input_hertz;
- plat->fcr = UART_FCR_DEFVAL;
- plat->flags = 0;
- if (cb_info->type == CB_SERIAL_TYPE_IO_MAPPED)
- plat->flags |= NS16550_FLAG_IO;
- return 0;
- }
- static const struct udevice_id coreboot_serial_ids[] = {
- { .compatible = "coreboot-serial" },
- { },
- };
- U_BOOT_DRIVER(coreboot_uart) = {
- .name = "coreboot_uart",
- .id = UCLASS_SERIAL,
- .of_match = coreboot_serial_ids,
- .priv_auto_alloc_size = sizeof(struct NS16550),
- .platdata_auto_alloc_size = sizeof(struct ns16550_platdata),
- .ofdata_to_platdata = coreboot_ofdata_to_platdata,
- .probe = ns16550_serial_probe,
- .ops = &ns16550_serial_ops,
- .flags = DM_FLAG_PRE_RELOC,
- };
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