1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Qualcomm Generic Interface (GENI) Serial Engine (SE) Wrapper
4 *
5 * Copyright (C) 2023 Linaro Ltd. <vladimir.zapolskiy@linaro.org>
6 */
7
8 #include <common.h>
9 #include <dm.h>
10 #include <misc.h>
11 #include <asm/io.h>
12
geni_se_qup_read(struct udevice * dev,int offset,void * buf,int size)13 static int geni_se_qup_read(struct udevice *dev, int offset,
14 void *buf, int size)
15 {
16 fdt_addr_t base = dev_read_addr(dev);
17
18 if (size != sizeof(u32))
19 return -EINVAL;
20
21 *(u32 *)buf = readl(base + offset);
22
23 return size;
24 }
25
26 static struct misc_ops geni_se_qup_ops = {
27 .read = geni_se_qup_read,
28 };
29
30 static const struct udevice_id geni_se_qup_ids[] = {
31 { .compatible = "qcom,geni-se-qup" },
32 {}
33 };
34
35 U_BOOT_DRIVER(geni_se_qup) = {
36 .name = "geni_se_qup",
37 .id = UCLASS_MISC,
38 .of_match = geni_se_qup_ids,
39 .ops = &geni_se_qup_ops,
40 .flags = DM_FLAG_PRE_RELOC,
41 };
42