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authorRob Herring (Arm) <robh@kernel.org>2026-08-31 14:43:51 -0500
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2026-09-13 18:17:31 -0700
commit55fc280e951ab2b39f3dcb640edc1b1eebc6d173 (patch)
treef0b5f37b42fc13b9908a31b657c646b024231cdd /arch/sh/mm/uncached.c
downloadlinux-stable-55fc280e951ab2b39f3dcb640edc1b1eebc6d173.tar.gz
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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.c44
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;
+}