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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/consistent.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/consistent.c')
| -rw-r--r-- | arch/sh/mm/consistent.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c new file mode 100644 index 000000000..0de206c1a --- /dev/null +++ b/arch/sh/mm/consistent.c @@ -0,0 +1,65 @@ +/* + * Copyright (C) 2004 - 2007 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/mm.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> +#include <linux/io.h> + +static int __init memchunk_setup(char *str) +{ + return 1; /* accept anything that begins with "memchunk." */ +} +__setup("memchunk.", memchunk_setup); + +static void __init memchunk_cmdline_override(char *name, unsigned long *sizep) +{ + char *p = boot_command_line; + int k = strlen(name); + + while ((p = strstr(p, "memchunk."))) { + p += 9; /* strlen("memchunk.") */ + if (!strncmp(name, p, k) && p[k] == '=') { + p += k + 1; + *sizep = memparse(p, NULL); + pr_info("%s: forcing memory chunk size to 0x%08lx\n", + name, *sizep); + break; + } + } +} + +int __init platform_resource_setup_memory(struct platform_device *pdev, + char *name, unsigned long memsize) +{ + struct resource *r; + dma_addr_t dma_handle; + void *buf; + + r = pdev->resource + pdev->num_resources - 1; + if (r->flags) { + pr_warn("%s: unable to find empty space for resource\n", name); + return -EINVAL; + } + + memchunk_cmdline_override(name, &memsize); + if (!memsize) + return 0; + + buf = dma_alloc_coherent(&pdev->dev, memsize, &dma_handle, GFP_KERNEL); + if (!buf) { + pr_warn("%s: unable to allocate memory\n", name); + return -ENOMEM; + } + + r->flags = IORESOURCE_MEM; + r->start = dma_handle; + r->end = r->start + memsize - 1; + r->name = name; + return 0; +} |
