1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2019, Microchip Technology, Inc.
4 * Author: Eugen Hristev <eugen.hristev@microchip.com>
12 #include <linux/err.h>
14 struct microchip_flexcom_regs {
18 struct microchip_flexcom_platdata {
19 struct microchip_flexcom_regs *regs;
23 static int microchip_flexcom_ofdata_to_platdata(struct udevice *dev)
25 struct microchip_flexcom_platdata *plat = dev_get_platdata(dev);
28 plat->regs = map_physmem(devfdt_get_addr(dev),
29 sizeof(struct microchip_flexcom_regs),
32 ret = dev_read_u32(dev, "atmel,flexcom-mode", &plat->flexcom_mode);
34 if (IS_ERR_VALUE(ret)) {
35 debug("Missing atmel,flexcom-mode property\n");
40 * The mode must have only 2 bits. If any other bits are set,
41 * the value is not supported.
43 if (plat->flexcom_mode & 0xfffffffc) {
44 debug("Wrong atmel,flexcom-mode property\n");
48 writel(plat->flexcom_mode, &plat->regs->cr);
53 static const struct udevice_id microchip_flexcom_ids[] = {
54 { .compatible = "atmel,sama5d2-flexcom" },
55 { .compatible = "microchip,flexcom" },
59 U_BOOT_DRIVER(microchip_flexcom) = {
60 .name = "microchip_flexcom",
62 .of_match = microchip_flexcom_ids,
63 .ofdata_to_platdata = microchip_flexcom_ofdata_to_platdata,
64 .platdata_auto_alloc_size = sizeof(struct microchip_flexcom_platdata),