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Message-Id: <20210120132154.2224550-1-arnd@kernel.org>
Date: Wed, 20 Jan 2021 14:21:54 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: Arnd Bergmann <arnd@...db.de>, Barry Song <baohua@...nel.org>
Subject: [PATCH] hwspinlock: remove sirf driver
From: Arnd Bergmann <arnd@...db.de>
The CSR SiRF prima2/atlas platforms are getting removed, so this driver
is no longer needed.
Cc: Barry Song <baohua@...nel.org>
Link: https://lore.kernel.org/linux-arm-kernel/20210120124812.2800027-1-arnd@kernel.org/T/
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
.../bindings/hwlock/sirf,hwspinlock.txt | 28 -----
drivers/hwspinlock/Kconfig | 11 --
drivers/hwspinlock/Makefile | 1 -
drivers/hwspinlock/sirf_hwspinlock.c | 105 ------------------
4 files changed, 145 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/hwlock/sirf,hwspinlock.txt
delete mode 100644 drivers/hwspinlock/sirf_hwspinlock.c
diff --git a/Documentation/devicetree/bindings/hwlock/sirf,hwspinlock.txt b/Documentation/devicetree/bindings/hwlock/sirf,hwspinlock.txt
deleted file mode 100644
index 9bb1240a68e0..000000000000
--- 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 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@....com>");
--
2.29.2
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