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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>
42 lines
822 B
C
42 lines
822 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Qualcomm Generic Interface (GENI) Serial Engine (SE) Wrapper
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*
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* Copyright (C) 2023 Linaro Ltd. <vladimir.zapolskiy@linaro.org>
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*/
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#include <common.h>
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#include <dm.h>
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#include <misc.h>
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#include <asm/io.h>
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static int geni_se_qup_read(struct udevice *dev, int offset,
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void *buf, int size)
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{
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fdt_addr_t base = dev_read_addr(dev);
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if (size != sizeof(u32))
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return -EINVAL;
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*(u32 *)buf = readl(base + offset);
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return size;
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}
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static struct misc_ops geni_se_qup_ops = {
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.read = geni_se_qup_read,
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};
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static const struct udevice_id geni_se_qup_ids[] = {
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{ .compatible = "qcom,geni-se-qup" },
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{}
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};
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U_BOOT_DRIVER(geni_se_qup) = {
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.name = "geni_se_qup",
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.id = UCLASS_MISC,
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.of_match = geni_se_qup_ids,
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.ops = &geni_se_qup_ops,
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.flags = DM_FLAG_PRE_RELOC,
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};
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