From 3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Wed, 2 Sep 2026 15:31:14 -0700 Subject: treewide: refresh kmalloc_obj() conversions This is another run of the Coccinelle script for converting kmalloc() family of allocations to kmalloc_obj() via the existing rules in scripts/coccinelle/api/kmalloc_objs.cocci This catches both the set of kmalloc() uses added since the first kmalloc_obj() conversions in v7.0 and adds a large group missed in the first pass due to Coccinelle not interacting well with the cleanup.h scoped_...() family of macros[1]. I worked around this with spatch's "--macro-file" argument to a file with all the scoped_...() macros mapped to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control flow indicator I could find. Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc, riscv, and s390 with no new warnings. Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1] Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2] Signed-off-by: Kees Cook --- drivers/gpio/gpio-loongson.c | 137 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 137 insertions(+) create mode 100644 drivers/gpio/gpio-loongson.c (limited to 'drivers/gpio/gpio-loongson.c') diff --git a/drivers/gpio/gpio-loongson.c b/drivers/gpio/gpio-loongson.c new file mode 100644 index 000000000..f3e0559f9 --- /dev/null +++ b/drivers/gpio/gpio-loongson.c @@ -0,0 +1,137 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Loongson-2F/3A/3B GPIO Support + * + * Copyright (c) 2008 Richard Liu, STMicroelectronics + * Copyright (c) 2008-2010 Arnaud Patard + * Copyright (c) 2013 Hongbing Hu + * Copyright (c) 2014 Huacai Chen + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define STLS2F_N_GPIO 4 +#define STLS3A_N_GPIO 16 + +#ifdef CONFIG_CPU_LOONGSON64 +#define LOONGSON_N_GPIO STLS3A_N_GPIO +#else +#define LOONGSON_N_GPIO STLS2F_N_GPIO +#endif + +/* + * Offset into the register where we read lines, we write them from offset 0. + * This offset is the only thing that stand between us and using + * GPIO_GENERIC. + */ +#define LOONGSON_GPIO_IN_OFFSET 16 + +static DEFINE_SPINLOCK(gpio_lock); + +static int loongson_gpio_get_value(struct gpio_chip *chip, unsigned gpio) +{ + u32 val; + + spin_lock(&gpio_lock); + val = LOONGSON_GPIODATA; + spin_unlock(&gpio_lock); + + return !!(val & BIT(gpio + LOONGSON_GPIO_IN_OFFSET)); +} + +static int loongson_gpio_set_value(struct gpio_chip *chip, unsigned int gpio, + int value) +{ + u32 val; + + spin_lock(&gpio_lock); + val = LOONGSON_GPIODATA; + if (value) + val |= BIT(gpio); + else + val &= ~BIT(gpio); + LOONGSON_GPIODATA = val; + spin_unlock(&gpio_lock); + + return 0; +} + +static int loongson_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) +{ + u32 temp; + + spin_lock(&gpio_lock); + temp = LOONGSON_GPIOIE; + temp |= BIT(gpio); + LOONGSON_GPIOIE = temp; + spin_unlock(&gpio_lock); + + return 0; +} + +static int loongson_gpio_direction_output(struct gpio_chip *chip, + unsigned gpio, int level) +{ + u32 temp; + + loongson_gpio_set_value(chip, gpio, level); + spin_lock(&gpio_lock); + temp = LOONGSON_GPIOIE; + temp &= ~BIT(gpio); + LOONGSON_GPIOIE = temp; + spin_unlock(&gpio_lock); + + return 0; +} + +static int loongson_gpio_probe(struct platform_device *pdev) +{ + struct gpio_chip *gc; + struct device *dev = &pdev->dev; + + gc = devm_kzalloc(dev, sizeof(*gc), GFP_KERNEL); + if (!gc) + return -ENOMEM; + + gc->label = "loongson-gpio-chip"; + gc->base = 0; + gc->ngpio = LOONGSON_N_GPIO; + gc->get = loongson_gpio_get_value; + gc->set = loongson_gpio_set_value; + gc->direction_input = loongson_gpio_direction_input; + gc->direction_output = loongson_gpio_direction_output; + + return gpiochip_add_data(gc, NULL); +} + +static struct platform_driver loongson_gpio_driver = { + .driver = { + .name = "loongson-gpio", + }, + .probe = loongson_gpio_probe, +}; + +static int __init loongson_gpio_setup(void) +{ + struct platform_device *pdev; + int ret; + + ret = platform_driver_register(&loongson_gpio_driver); + if (ret) { + pr_err("error registering loongson GPIO driver\n"); + return ret; + } + + pdev = platform_device_register_simple("loongson-gpio", -1, NULL, 0); + return PTR_ERR_OR_ZERO(pdev); +} +postcore_initcall(loongson_gpio_setup); -- cgit v1.3.1