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board/tq: Add common SoM API

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Reduce code duplication by adding a default implementation.

Signed-off-by: Max Merchel <Max.Merchel@ew.tq-group.com>
Signed-off-by: Alexander Feilke <alexander.feilke@ew.tq-group.com>
This commit is contained in:
Alexander Feilke 2026-04-07 15:06:45 +02:00 committed by Fabio Estevam
parent 60d41b6551
commit c8eebe0a70
4 changed files with 71 additions and 0 deletions
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3
board/tq/common/Kconfig
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@ -11,3 +11,6 @@ config TQ_COMMON_BB
config TQ_COMMON_SDMMC
bool
config TQ_COMMON_SOM
bool

1
board/tq/common/Makefile
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@ -6,4 +6,5 @@
#
obj-$(CONFIG_TQ_COMMON_BB) += tq_bb.o
obj-$(CONFIG_TQ_COMMON_SOM) += tq_som.o
obj-$(CONFIG_TQ_COMMON_SDMMC) += tq_sdmmc.o

32
board/tq/common/tq_som.c Normal file
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@ -0,0 +1,32 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2025-2026 TQ-Systems GmbH <u-boot@ew.tq-group.com>,
* D-82229 Seefeld, Germany.
* Author: Alexander Feilke, Max Merchel
*/
#include <init.h>
#include <asm/io.h>
#include <linux/sizes.h>
#include "tq_som.h"
void __weak tq_som_ram_init(void)
{
;
}
/*
* checks if the accessible range equals the requested RAM size.
* returns true if successful, false otherwise
*/
bool tq_som_ram_check_size(long ram_size)
{
long size;
size = get_ram_size((void *)PHYS_SDRAM, ram_size);
debug("SPL: requested RAM size %lu MiB. accessible %lu MiB\n",
ram_size / (SZ_1M), size / (SZ_1M));
return (size == ram_size);
}

35
board/tq/common/tq_som.h Normal file
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@ -0,0 +1,35 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (c) 2025-2026 TQ-Systems GmbH <u-boot@ew.tq-group.com>,
* D-82229 Seefeld, Germany.
* Author: Alexander Feilke, Max Merchel
*/
#ifndef __TQ_SOM_H
#define __TQ_SOM_H
#include <init.h>
#include <asm/io.h>
#include <linux/iopoll.h>
void tq_som_ram_init(void);
/* used as a wrapper to write to specific register addresses */
static inline void tq_som_init_write_reg(u32 address, u32 value)
{
writel_relaxed(value, address);
}
/*
* checks if the accessible range equals the requested ram size.
* returns true if successful, false otherwise
*/
bool tq_som_ram_check_size(long ram_size);
static inline void tq_som_check_bits_set(u32 address, u32 mask)
{
u32 val;
readl_poll_timeout(address, val, (val & mask) == mask, 1000);
}
#endif /* __TQ_SOM_H */