mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-09-23 08:01:59 +00:00
1b15483deb
This change adds a Qualcomm GENI SE QUP device driver as a wrapper for actually enabled and used serial devices found on a board. At the moment the driver is pretty simple, its intention is to populate childred devices and provide I/O mem read interface to them as clients, this is needed for GENI UART driver to set up a proper clock divider and provide the actually asked baud rate. Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org> Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
41 lines
822 B
C
41 lines
822 B
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Qualcomm Generic Interface (GENI) Serial Engine (SE) Wrapper
|
|
*
|
|
* Copyright (C) 2023 Linaro Ltd. <vladimir.zapolskiy@linaro.org>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <misc.h>
|
|
#include <asm/io.h>
|
|
|
|
static int geni_se_qup_read(struct udevice *dev, int offset,
|
|
void *buf, int size)
|
|
{
|
|
fdt_addr_t base = dev_read_addr(dev);
|
|
|
|
if (size != sizeof(u32))
|
|
return -EINVAL;
|
|
|
|
*(u32 *)buf = readl(base + offset);
|
|
|
|
return size;
|
|
}
|
|
|
|
static struct misc_ops geni_se_qup_ops = {
|
|
.read = geni_se_qup_read,
|
|
};
|
|
|
|
static const struct udevice_id geni_se_qup_ids[] = {
|
|
{ .compatible = "qcom,geni-se-qup" },
|
|
{}
|
|
};
|
|
|
|
U_BOOT_DRIVER(geni_se_qup) = {
|
|
.name = "geni_se_qup",
|
|
.id = UCLASS_MISC,
|
|
.of_match = geni_se_qup_ids,
|
|
.ops = &geni_se_qup_ops,
|
|
.flags = DM_FLAG_PRE_RELOC,
|
|
};
|