From 55fc280e951ab2b39f3dcb640edc1b1eebc6d173 Mon Sep 17 00:00:00 2001 From: "Rob Herring (Arm)" Date: Mon, 31 Aug 2026 14:43:51 -0500 Subject: Input: tsc2007 - read "ti,poll-period" as u32 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) Link: https://patch.msgid.link/20260831194352.1185860-1-robh@kernel.org Signed-off-by: Dmitry Torokhov --- lib/test_bitops.c | 139 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 139 insertions(+) create mode 100644 lib/test_bitops.c (limited to 'lib/test_bitops.c') diff --git a/lib/test_bitops.c b/lib/test_bitops.c new file mode 100644 index 000000000..55669624b --- /dev/null +++ b/lib/test_bitops.c @@ -0,0 +1,139 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2020 Intel Corporation + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include + +/* a tiny module only meant to test + * + * set/clear_bit + * get_count_order/long + */ + +/* use an enum because that's the most common BITMAP usage */ +enum bitops_fun { + BITOPS_4 = 4, + BITOPS_7 = 7, + BITOPS_11 = 11, + BITOPS_31 = 31, + BITOPS_88 = 88, + BITOPS_LAST = 255, + BITOPS_LENGTH = 256 +}; + +static DECLARE_BITMAP(g_bitmap, BITOPS_LENGTH); + +static unsigned int order_comb[][2] = { + {0x00000003, 2}, + {0x00000004, 2}, + {0x00001fff, 13}, + {0x00002000, 13}, + {0x50000000, 31}, + {0x80000000, 31}, + {0x80003000, 32}, +}; + +#ifdef CONFIG_64BIT +static unsigned long order_comb_long[][2] = { + {0x0000000300000000, 34}, + {0x0000000400000000, 34}, + {0x00001fff00000000, 45}, + {0x0000200000000000, 45}, + {0x5000000000000000, 63}, + {0x8000000000000000, 63}, + {0x8000300000000000, 64}, +}; +#endif + +static int __init test_fns(void) +{ + static volatile __always_used unsigned long tmp __initdata; + unsigned long *buf __free(kfree) = NULL; + unsigned int i, n; + ktime_t time; + + buf = kmalloc_array(10000, sizeof(unsigned long), GFP_KERNEL); + if (!buf) + return -ENOMEM; + + get_random_bytes(buf, 10000 * sizeof(unsigned long)); + time = ktime_get(); + + for (n = 0; n < BITS_PER_LONG; n++) + for (i = 0; i < 10000; i++) + tmp = fns(buf[i], n); + + time = ktime_get() - time; + pr_err("fns: %18llu ns\n", time); + + return 0; +} + +static int __init test_bitops_startup(void) +{ + int i, bit_set; + + pr_info("Starting bitops test\n"); + set_bit(BITOPS_4, g_bitmap); + set_bit(BITOPS_7, g_bitmap); + set_bit(BITOPS_11, g_bitmap); + set_bit(BITOPS_31, g_bitmap); + set_bit(BITOPS_88, g_bitmap); + + for (i = 0; i < ARRAY_SIZE(order_comb); i++) { + if (order_comb[i][1] != get_count_order(order_comb[i][0])) + pr_warn("get_count_order wrong for %x\n", + order_comb[i][0]); + } + + for (i = 0; i < ARRAY_SIZE(order_comb); i++) { + if (order_comb[i][1] != get_count_order_long(order_comb[i][0])) + pr_warn("get_count_order_long wrong for %x\n", + order_comb[i][0]); + } + +#ifdef CONFIG_64BIT + for (i = 0; i < ARRAY_SIZE(order_comb_long); i++) { + if (order_comb_long[i][1] != + get_count_order_long(order_comb_long[i][0])) + pr_warn("get_count_order_long wrong for %lx\n", + order_comb_long[i][0]); + } +#endif + + barrier(); + + clear_bit(BITOPS_4, g_bitmap); + clear_bit(BITOPS_7, g_bitmap); + clear_bit(BITOPS_11, g_bitmap); + clear_bit(BITOPS_31, g_bitmap); + clear_bit(BITOPS_88, g_bitmap); + + bit_set = find_first_bit(g_bitmap, BITOPS_LAST); + if (bit_set != BITOPS_LAST) + pr_err("ERROR: FOUND SET BIT %d\n", bit_set); + + test_fns(); + + pr_info("Completed bitops test\n"); + + return 0; +} + +static void __exit test_bitops_unstartup(void) +{ +} + +module_init(test_bitops_startup); +module_exit(test_bitops_unstartup); + +MODULE_AUTHOR("Jesse Brandeburg , Wei Yang "); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Bit testing module"); -- cgit v1.3.1