From cf9610f9116d55c5a66ef9f1faecacabd93a9322 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Mon, 24 Aug 2026 08:46:03 -0700 Subject: Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl Pull pin control updates from Linus Walleij: "Core changes: - Use the non-blocking mux_state_try_select() in the generic MUX pin control back-end - Free pin maps on pinctrl_generic_to_map() failure in the core helpers New hardware pin control: - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC (this is for the low power audio, LPASS = Low Power Audio SubSystem portions) - Upboard support on top of the Intel pin controller - Apple T6030 and T6031 support (just compatible strings) - Samsung Exynos 8855 SoC - Mediatek MT6858 SoC - Rockchip RK3308B and RV1106 SoCs - Airoha EN7523 and AN7563 SoCs Improvements: - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable - Qualcomm improvements on top of the Qualcomm PDC (power domain controller) irqchip improvements from tglx:s tree - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups - The NPCM8xx driver has been put into shape fixing many pin and group definitions - Some non-urgent Tegra 264 pin assignments are fixed up - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and pin assignments, missing features etc" * tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits) dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema pinctrl: meson: sync some modify from A4 pinctrl: meson: a4: Add input enable pin configuration pinctrl: realtek: rtd1625: remove unused group name spdif_sel pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13 dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema Revert "Merge branch 'ib-rsk7204' into devel" pinctrl: rockchip: Add RV1106 pinctrl support dt-bindings: pinctrl: rockchip: Add RV1106 compatible pinctrl: rockchip: Decode drive strength in the get function pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable pinctrl: airoha: add support of an7563 SoC dt-bindings: pinctrl: airoha: add support of an7563 pin controller pinctrl: airoha: try to find chip scu node by phandle first pinctrl: airoha: add support of en7523 SoC dt-bindings: pinctrl: airoha: add support of en7523 pin controller pinctrl: airoha: an7583: add support for olt pinmux pinctrl: airoha: an7583: add support for pon_alt pinmux pinctrl: airoha: an7583: add support for npu_uart pinmux dt-bindings: pinctrl: airoha: an7583: add missed features ... --- arch/sparc/lib/bitext.c | 128 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 128 insertions(+) create mode 100644 arch/sparc/lib/bitext.c (limited to 'arch/sparc/lib/bitext.c') diff --git a/arch/sparc/lib/bitext.c b/arch/sparc/lib/bitext.c new file mode 100644 index 000000000..32a5c1d94 --- /dev/null +++ b/arch/sparc/lib/bitext.c @@ -0,0 +1,128 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * bitext.c: kernel little helper (of bit shuffling variety). + * + * Copyright (C) 2002 Pete Zaitcev + * + * The algorithm to search a zero bit string is geared towards its application. + * We expect a couple of fixed sizes of requests, so a rotating counter, reset + * by align size, should provide fast enough search while maintaining low + * fragmentation. + */ + +#include +#include + +#include + +/** + * bit_map_string_get - find and set a bit string in bit map. + * @t: the bit map. + * @len: requested string length + * @align: requested alignment + * + * Returns offset in the map or -1 if out of space. + * + * Not safe to call from an interrupt (uses spin_lock). + */ +int bit_map_string_get(struct bit_map *t, int len, int align) +{ + int offset, count; /* siamese twins */ + int off_new; + int align1; + int i, color; + + if (t->num_colors) { + /* align is overloaded to be the page color */ + color = align; + align = t->num_colors; + } else { + color = 0; + if (align == 0) + align = 1; + } + align1 = align - 1; + if ((align & align1) != 0) + BUG(); + if (align < 0 || align >= t->size) + BUG(); + if (len <= 0 || len > t->size) + BUG(); + color &= align1; + + spin_lock(&t->lock); + if (len < t->last_size) + offset = t->first_free; + else + offset = t->last_off & ~align1; + count = 0; + for (;;) { + off_new = find_next_zero_bit(t->map, t->size, offset); + off_new = ((off_new + align1) & ~align1) + color; + count += off_new - offset; + offset = off_new; + if (offset >= t->size) + offset = 0; + if (count + len > t->size) { + spin_unlock(&t->lock); +/* P3 */ printk(KERN_ERR + "bitmap out: size %d used %d off %d len %d align %d count %d\n", + t->size, t->used, offset, len, align, count); + return -1; + } + + if (offset + len > t->size) { + count += t->size - offset; + offset = 0; + continue; + } + + i = 0; + while (test_bit(offset + i, t->map) == 0) { + i++; + if (i == len) { + bitmap_set(t->map, offset, len); + if (offset == t->first_free) + t->first_free = find_next_zero_bit + (t->map, t->size, + t->first_free + len); + if ((t->last_off = offset + len) >= t->size) + t->last_off = 0; + t->used += len; + t->last_size = len; + spin_unlock(&t->lock); + return offset; + } + } + count += i + 1; + if ((offset += i + 1) >= t->size) + offset = 0; + } +} + +void bit_map_clear(struct bit_map *t, int offset, int len) +{ + int i; + + if (t->used < len) + BUG(); /* Much too late to do any good, but alas... */ + spin_lock(&t->lock); + for (i = 0; i < len; i++) { + if (test_bit(offset + i, t->map) == 0) + BUG(); + __clear_bit(offset + i, t->map); + } + if (offset < t->first_free) + t->first_free = offset; + t->used -= len; + spin_unlock(&t->lock); +} + +void bit_map_init(struct bit_map *t, unsigned long *map, int size) +{ + bitmap_zero(map, size); + memset(t, 0, sizeof *t); + spin_lock_init(&t->lock); + t->map = map; + t->size = size; +} -- cgit v1.3.1