From a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656 Mon Sep 17 00:00:00 2001 From: Breno Leitao Date: Wed, 5 Aug 2026 07:52:36 -0700 Subject: workqueue: skip the node_nr_active update for non-unbound workqueues apply_wqattrs_commit() updates node_nr_active->max unconditionally. wq->node_nr_active[] is only allocated for unbound workqueues, so guard the call before per-cpu workqueues start using this path. No functional change: only unbound workqueues reach apply_wqattrs_*() today. Signed-off-by: Breno Leitao Signed-off-by: Tejun Heo --- drivers/soc/gemini/Makefile | 2 ++ drivers/soc/gemini/soc-gemini.c | 71 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 73 insertions(+) create mode 100644 drivers/soc/gemini/Makefile create mode 100644 drivers/soc/gemini/soc-gemini.c (limited to 'drivers/soc/gemini') diff --git a/drivers/soc/gemini/Makefile b/drivers/soc/gemini/Makefile new file mode 100644 index 000000000..8cbd1e45d --- /dev/null +++ b/drivers/soc/gemini/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-y += soc-gemini.o diff --git a/drivers/soc/gemini/soc-gemini.c b/drivers/soc/gemini/soc-gemini.c new file mode 100644 index 000000000..642b96c91 --- /dev/null +++ b/drivers/soc/gemini/soc-gemini.c @@ -0,0 +1,71 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2017 Linaro Ltd. + * + * Author: Linus Walleij + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2, as + * published by the Free Software Foundation. + * + */ +#include +#include +#include +#include +#include + +#define GLOBAL_WORD_ID 0x00 +#define GEMINI_GLOBAL_ARB1_CTRL 0x2c +#define GEMINI_ARB1_BURST_MASK GENMASK(21, 16) +#define GEMINI_ARB1_BURST_SHIFT 16 +/* These all define the priority on the BUS2 backplane */ +#define GEMINI_ARB1_PRIO_MASK GENMASK(9, 0) +#define GEMINI_ARB1_DMAC_HIGH_PRIO BIT(0) +#define GEMINI_ARB1_IDE_HIGH_PRIO BIT(1) +#define GEMINI_ARB1_RAID_HIGH_PRIO BIT(2) +#define GEMINI_ARB1_SECURITY_HIGH_PRIO BIT(3) +#define GEMINI_ARB1_GMAC0_HIGH_PRIO BIT(4) +#define GEMINI_ARB1_GMAC1_HIGH_PRIO BIT(5) +#define GEMINI_ARB1_USB0_HIGH_PRIO BIT(6) +#define GEMINI_ARB1_USB1_HIGH_PRIO BIT(7) +#define GEMINI_ARB1_PCI_HIGH_PRIO BIT(8) +#define GEMINI_ARB1_TVE_HIGH_PRIO BIT(9) + +#define GEMINI_DEFAULT_BURST_SIZE 0x20 +#define GEMINI_DEFAULT_PRIO (GEMINI_ARB1_GMAC0_HIGH_PRIO | \ + GEMINI_ARB1_GMAC1_HIGH_PRIO) + +static int __init gemini_soc_init(void) +{ + struct regmap *map; + u32 rev; + u32 val; + int ret; + + /* Multiplatform guard, only proceed on Gemini */ + if (!of_machine_is_compatible("cortina,gemini")) + return 0; + + map = syscon_regmap_lookup_by_compatible("cortina,gemini-syscon"); + if (IS_ERR(map)) + return PTR_ERR(map); + ret = regmap_read(map, GLOBAL_WORD_ID, &rev); + if (ret) + return ret; + + val = (GEMINI_DEFAULT_BURST_SIZE << GEMINI_ARB1_BURST_SHIFT) | + GEMINI_DEFAULT_PRIO; + + /* Set up system arbitration */ + regmap_update_bits(map, + GEMINI_GLOBAL_ARB1_CTRL, + GEMINI_ARB1_BURST_MASK | GEMINI_ARB1_PRIO_MASK, + val); + + pr_info("Gemini SoC %04x revision %02x, set arbitration %08x\n", + rev >> 8, rev & 0xff, val); + + return 0; +} +subsys_initcall(gemini_soc_init); -- cgit v1.3.1