hwspinlock: remove sirf driver

The CSR SiRF prima2/atlas platforms are getting removed, so this driver
is no longer needed.

Cc: Barry Song <baohua@kernel.org>
Link: https://lore.kernel.org/linux-arm-kernel/20210120124812.2800027-1-arnd@kernel.org/T/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210120132537.2285157-1-arnd@kernel.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/Documentation/devicetree/bindings/hwlock/sirf,hwspinlock.txt b/Documentation/devicetree/bindings/hwlock/sirf,hwspinlock.txt
deleted file mode 100644 (file)
index 9bb1240..0000000
--- a/Documentation/devicetree/bindings/hwlock/sirf,hwspinlock.txt
+++ /dev/null
@@ -1,28 +0,0 @@
-SIRF Hardware spinlock device Binding
------------------------------------------------
-
-Required properties :
-- compatible : shall contain only one of the following:
-       "sirf,hwspinlock"
-
-- reg : the register address of hwspinlock
-
-- #hwlock-cells : hwlock users only use the hwlock id to represent a specific
-       hwlock, so the number of cells should be <1> here.
-
-Please look at the generic hwlock binding for usage information for consumers,
-"Documentation/devicetree/bindings/hwlock/hwlock.txt"
-
-Example of hwlock provider:
-       hwlock {
-               compatible = "sirf,hwspinlock";
-               reg = <0x13240000 0x00010000>;
-               #hwlock-cells = <1>;
-       };
-
-Example of hwlock users:
-       node {
-               ...
-               hwlocks = <&hwlock 2>;
-               ...
-       };

diff --git a/drivers/hwspinlock/Kconfig b/drivers/hwspinlock/Kconfig
index 32cd263..53e1347 100644 (file)
--- 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 ed053e3..1f8dd6f 100644 (file)
--- 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 (file)
index a3f7712..0000000
--- 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>");