diff options
Diffstat (limited to 'drivers/hwspinlock')
| -rw-r--r-- | drivers/hwspinlock/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/hwspinlock/Makefile | 1 | ||||
| -rw-r--r-- | drivers/hwspinlock/sirf_hwspinlock.c | 105 |
3 files changed, 0 insertions, 117 deletions
diff --git a/drivers/hwspinlock/Kconfig b/drivers/hwspinlock/Kconfig index 32cd26352f38..53e13476e831 100644 --- a/drivers/hwspinlock/Kconfig +++ b/drivers/hwspinlock/Kconfig @@ -28,17 +28,6 @@ config HWSPINLOCK_QCOM If unsure, say N. -config HWSPINLOCK_SIRF - tristate "SIRF Hardware Spinlock device" - depends on ARCH_SIRF || COMPILE_TEST - help - Say y here to support the SIRF Hardware Spinlock device, which - provides a synchronisation mechanism for the various processors - on the SoC. - - It's safe to say n here if you're not interested in SIRF hardware - spinlock or just want a bare minimum kernel. - config HWSPINLOCK_SPRD tristate "SPRD Hardware Spinlock device" depends on ARCH_SPRD || COMPILE_TEST diff --git a/drivers/hwspinlock/Makefile b/drivers/hwspinlock/Makefile index ed053e3f02be..1f8dd6f5814f 100644 --- a/drivers/hwspinlock/Makefile +++ b/drivers/hwspinlock/Makefile @@ -6,7 +6,6 @@ obj-$(CONFIG_HWSPINLOCK) += hwspinlock_core.o obj-$(CONFIG_HWSPINLOCK_OMAP) += omap_hwspinlock.o obj-$(CONFIG_HWSPINLOCK_QCOM) += qcom_hwspinlock.o -obj-$(CONFIG_HWSPINLOCK_SIRF) += sirf_hwspinlock.o obj-$(CONFIG_HWSPINLOCK_SPRD) += sprd_hwspinlock.o obj-$(CONFIG_HWSPINLOCK_STM32) += stm32_hwspinlock.o obj-$(CONFIG_HSEM_U8500) += u8500_hsem.o diff --git a/drivers/hwspinlock/sirf_hwspinlock.c b/drivers/hwspinlock/sirf_hwspinlock.c deleted file mode 100644 index a3f77120bad7..000000000000 --- a/drivers/hwspinlock/sirf_hwspinlock.c +++ /dev/null @@ -1,105 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * SIRF hardware spinlock driver - * - * Copyright (c) 2015 Cambridge Silicon Radio Limited, a CSR plc group company. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/device.h> -#include <linux/io.h> -#include <linux/slab.h> -#include <linux/spinlock.h> -#include <linux/hwspinlock.h> -#include <linux/platform_device.h> -#include <linux/of.h> -#include <linux/of_address.h> - -#include "hwspinlock_internal.h" - -struct sirf_hwspinlock { - void __iomem *io_base; - struct hwspinlock_device bank; -}; - -/* Number of Hardware Spinlocks*/ -#define HW_SPINLOCK_NUMBER 30 - -/* Hardware spinlock register offsets */ -#define HW_SPINLOCK_BASE 0x404 -#define HW_SPINLOCK_OFFSET(x) (HW_SPINLOCK_BASE + 0x4 * (x)) - -static int sirf_hwspinlock_trylock(struct hwspinlock *lock) -{ - void __iomem *lock_addr = lock->priv; - - /* attempt to acquire the lock by reading value == 1 from it */ - return !!readl(lock_addr); -} - -static void sirf_hwspinlock_unlock(struct hwspinlock *lock) -{ - void __iomem *lock_addr = lock->priv; - - /* release the lock by writing 0 to it */ - writel(0, lock_addr); -} - -static const struct hwspinlock_ops sirf_hwspinlock_ops = { - .trylock = sirf_hwspinlock_trylock, - .unlock = sirf_hwspinlock_unlock, -}; - -static int sirf_hwspinlock_probe(struct platform_device *pdev) -{ - struct sirf_hwspinlock *hwspin; - struct hwspinlock *hwlock; - int idx; - - if (!pdev->dev.of_node) - return -ENODEV; - - hwspin = devm_kzalloc(&pdev->dev, - struct_size(hwspin, bank.lock, - HW_SPINLOCK_NUMBER), - GFP_KERNEL); - if (!hwspin) - return -ENOMEM; - - /* retrieve io base */ - hwspin->io_base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(hwspin->io_base)) - return PTR_ERR(hwspin->io_base); - - for (idx = 0; idx < HW_SPINLOCK_NUMBER; idx++) { - hwlock = &hwspin->bank.lock[idx]; - hwlock->priv = hwspin->io_base + HW_SPINLOCK_OFFSET(idx); - } - - platform_set_drvdata(pdev, hwspin); - - return devm_hwspin_lock_register(&pdev->dev, &hwspin->bank, - &sirf_hwspinlock_ops, 0, - HW_SPINLOCK_NUMBER); -} - -static const struct of_device_id sirf_hwpinlock_ids[] = { - { .compatible = "sirf,hwspinlock", }, - {}, -}; -MODULE_DEVICE_TABLE(of, sirf_hwpinlock_ids); - -static struct platform_driver sirf_hwspinlock_driver = { - .probe = sirf_hwspinlock_probe, - .driver = { - .name = "atlas7_hwspinlock", - .of_match_table = sirf_hwpinlock_ids, - }, -}; - -module_platform_driver(sirf_hwspinlock_driver); - -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("SIRF Hardware spinlock driver"); -MODULE_AUTHOR("Wei Chen <wei.chen@csr.com>"); |