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| author | Rob Herring (Arm) <robh@kernel.org> | 2026-08-31 14:43:51 -0500 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2026-09-13 18:17:31 -0700 |
| commit | 55fc280e951ab2b39f3dcb640edc1b1eebc6d173 (patch) | |
| tree | f0b5f37b42fc13b9908a31b657c646b024231cdd /arch/sh/mm/uncached.c | |
| download | linux-stable-55fc280e951ab2b39f3dcb640edc1b1eebc6d173.tar.gz linux-stable-55fc280e951ab2b39f3dcb640edc1b1eebc6d173.zip | |
Input: tsc2007 - read "ti,poll-period" as u32grafted
The "ti,poll-period" property is documented as a normal uint32 cell.
The driver used a u64 helper, which makes the helper type disagree with
the schema even though the stored value is still small.
Read "ti,poll-period" with the u32 helper matching the documented DT
cell size.
Assisted-by: Codex:gpt-5-5
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260831194352.1185860-1-robh@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'arch/sh/mm/uncached.c')
| -rw-r--r-- | arch/sh/mm/uncached.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/sh/mm/uncached.c b/arch/sh/mm/uncached.c new file mode 100644 index 000000000..bd1585e8e --- /dev/null +++ b/arch/sh/mm/uncached.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/init.h> +#include <linux/module.h> +#include <linux/sizes.h> +#include <asm/page.h> +#include <asm/addrspace.h> + +/* + * This is the offset of the uncached section from its cached alias. + * + * Legacy platforms handle trivial transitions between cached and + * uncached segments by making use of the 1:1 mapping relationship in + * 512MB lowmem, others via a special uncached mapping. + * + * Default value only valid in 29 bit mode, in 32bit mode this will be + * updated by the early PMB initialization code. + */ +unsigned long cached_to_uncached = SZ_512M; +unsigned long uncached_size = SZ_512M; +unsigned long uncached_start, uncached_end; +EXPORT_SYMBOL(uncached_start); +EXPORT_SYMBOL(uncached_end); + +int virt_addr_uncached(unsigned long kaddr) +{ + return (kaddr >= uncached_start) && (kaddr < uncached_end); +} +EXPORT_SYMBOL(virt_addr_uncached); + +void __init uncached_init(void) +{ +#if defined(CONFIG_29BIT) || !defined(CONFIG_MMU) + uncached_start = P2SEG; +#else + uncached_start = memory_end; +#endif + uncached_end = uncached_start + uncached_size; +} + +void __init uncached_resize(unsigned long size) +{ + uncached_size = size; + uncached_end = uncached_start + uncached_size; +} |
