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Diffstat (limited to 'meta-rcar-gen3/recipes-kernel/linux/linux-renesas/0017-Revert-Revert-hwspinlock-rcar-Add-support-for-R-Car-.patch')
-rw-r--r--meta-rcar-gen3/recipes-kernel/linux/linux-renesas/0017-Revert-Revert-hwspinlock-rcar-Add-support-for-R-Car-.patch214
1 files changed, 214 insertions, 0 deletions
diff --git a/meta-rcar-gen3/recipes-kernel/linux/linux-renesas/0017-Revert-Revert-hwspinlock-rcar-Add-support-for-R-Car-.patch b/meta-rcar-gen3/recipes-kernel/linux/linux-renesas/0017-Revert-Revert-hwspinlock-rcar-Add-support-for-R-Car-.patch
new file mode 100644
index 0000000..a4f0744
--- /dev/null
+++ b/meta-rcar-gen3/recipes-kernel/linux/linux-renesas/0017-Revert-Revert-hwspinlock-rcar-Add-support-for-R-Car-.patch
@@ -0,0 +1,214 @@
+From d10a3b0e5170ebe5350342c3e36902ff3624f2b1 Mon Sep 17 00:00:00 2001
+From: Hiroki Negishi <hiroki.negishi.bx@renesas.com>
+Date: Mon, 13 Nov 2017 11:58:51 +0900
+Subject: [PATCH 17/23] Revert "Revert "hwspinlock: rcar: Add support for R-Car
+ Gen3 Hardware Spinlock""
+
+This reverts commit b960f2c58f30 ("Revert "hwspinlock: rcar: Add
+support for R-Car Gen3 Hardware Spinlock"")
+
+Signed-off-by: Hiroki Negishi <hiroki.negishi.bx@renesas.com>
+---
+ drivers/hwspinlock/Kconfig | 13 +++
+ drivers/hwspinlock/Makefile | 1 +
+ drivers/hwspinlock/rcar_hwspinlock.c | 156 +++++++++++++++++++++++++++++++++++
+ 3 files changed, 170 insertions(+)
+ create mode 100644 drivers/hwspinlock/rcar_hwspinlock.c
+
+diff --git a/drivers/hwspinlock/Kconfig b/drivers/hwspinlock/Kconfig
+index 73a4016..f0c0a35 100644
+--- a/drivers/hwspinlock/Kconfig
++++ b/drivers/hwspinlock/Kconfig
+@@ -53,4 +53,17 @@ config HSEM_U8500
+
+ If unsure, say N.
+
++config HWSPINLOCK_RCAR
++ bool "R-Car Hardware Spinlock functionality"
++ depends on ARCH_RENESAS
++ select HWSPINLOCK
++ default y
++ help
++ Say y here to support the R-Car Hardware Spinlock functionality, which
++ provides a synchronisation mechanism for the various processor on the
++ SoC.
++ This function is implemented with MFIS device.
++
++ If unsure, say N.
++
+ endmenu
+diff --git a/drivers/hwspinlock/Makefile b/drivers/hwspinlock/Makefile
+index 6b59cb5a..4ee4001 100644
+--- a/drivers/hwspinlock/Makefile
++++ b/drivers/hwspinlock/Makefile
+@@ -6,4 +6,5 @@ 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-$(CONFIG_HWSPINLOCK_RCAR) += rcar_hwspinlock.o
+ obj-$(CONFIG_HSEM_U8500) += u8500_hsem.o
+diff --git a/drivers/hwspinlock/rcar_hwspinlock.c b/drivers/hwspinlock/rcar_hwspinlock.c
+new file mode 100644
+index 0000000..35ba8c1
+--- /dev/null
++++ b/drivers/hwspinlock/rcar_hwspinlock.c
+@@ -0,0 +1,156 @@
++/*
++ * rcar_hwspinlock.c
++ *
++ * Copyright (C) 2016 Renesas Electronics Corporation
++ *
++ * 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.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ */
++#include <linux/hwspinlock.h>
++#include <linux/clk.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/pm_runtime.h>
++#include <linux/of.h>
++#include <linux/of_device.h>
++#include <linux/of_address.h>
++#include <linux/platform_device.h>
++#include <linux/io.h>
++
++#include "hwspinlock_internal.h"
++
++#define RCAR_HWSPINLOCK_NUM (8)
++
++static int rcar_hwspinlock_trylock(struct hwspinlock *lock)
++{
++ void __iomem *addr = lock->priv;
++
++ return !ioread32(addr);
++}
++
++static void rcar_hwspinlock_unlock(struct hwspinlock *lock)
++{
++ void __iomem *addr = lock->priv;
++
++ iowrite32(0, addr);
++}
++
++static const struct hwspinlock_ops rcar_hwspinlock_ops = {
++ .trylock = rcar_hwspinlock_trylock,
++ .unlock = rcar_hwspinlock_unlock,
++};
++
++static const struct of_device_id rcar_hwspinlock_of_match[] = {
++ { .compatible = "renesas,mfis-lock" },
++ { },
++};
++MODULE_DEVICE_TABLE(of, rcar_hwspinlock_of_match);
++
++static int rcar_hwspinlock_probe(struct platform_device *pdev)
++{
++ int idx;
++ int ret = 0;
++ u32 __iomem *addr;
++ struct hwspinlock_device *bank;
++ struct hwspinlock *lock;
++ struct resource *res = NULL;
++ struct clk *clock;
++
++ /* enable MFIS clock */
++ clock = of_clk_get(pdev->dev.of_node, 0);
++ if (!clock) {
++ dev_err(&pdev->dev, "Failed to get clock.\n");
++ ret = PTR_ERR(clock);
++ goto out;
++ }
++ clk_prepare_enable(clock);
++
++ pm_runtime_enable(&pdev->dev);
++
++ /* map MFIS register */
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ addr = (u32 __iomem *)devm_ioremap_nocache(&pdev->dev,
++ res->start, resource_size(res));
++ if (IS_ERR(addr)) {
++ dev_err(&pdev->dev, "Failed to remap MFIS Lock register.\n");
++ ret = PTR_ERR(addr);
++ goto clk_disable;
++ }
++
++ /* create hwspinlock control info */
++ bank = devm_kzalloc(&pdev->dev,
++ sizeof(*bank) + sizeof(*lock) * RCAR_HWSPINLOCK_NUM,
++ GFP_KERNEL);
++ if (!bank) {
++ dev_err(&pdev->dev, "Failed to allocate memory.\n");
++ ret = PTR_ERR(bank);
++ goto clk_disable;
++ }
++
++ for (idx = 0; idx < RCAR_HWSPINLOCK_NUM; idx++) {
++ lock = &bank->lock[idx];
++ lock->priv = &addr[idx];
++ }
++ platform_set_drvdata(pdev, bank);
++
++ /* register hwspinlock */
++ ret = hwspin_lock_register(bank, &pdev->dev, &rcar_hwspinlock_ops,
++ 0, RCAR_HWSPINLOCK_NUM);
++ if (!ret)
++ goto out;
++
++clk_disable:
++ if (clock)
++ clk_disable_unprepare(clock);
++
++out:
++ return ret;
++}
++
++static int rcar_hwspinlock_remove(struct platform_device *pdev)
++{
++ int ret;
++ struct clk *clock = NULL;
++
++ ret = hwspin_lock_unregister(platform_get_drvdata(pdev));
++ if (ret) {
++ dev_err(&pdev->dev, "%s failed: %d\n", __func__, ret);
++ return ret;
++ }
++
++ pm_runtime_disable(&pdev->dev);
++ clock = of_clk_get(pdev->dev.of_node, 0);
++ if (clock)
++ clk_disable_unprepare(clock);
++
++ return 0;
++}
++
++static struct platform_driver rcar_hwspinlock_driver = {
++ .probe = rcar_hwspinlock_probe,
++ .remove = rcar_hwspinlock_remove,
++ .driver = {
++ .name = "rcar_hwspinlock",
++ .of_match_table = rcar_hwspinlock_of_match,
++ },
++};
++
++static int __init rcar_hwspinlock_init(void)
++{
++ return platform_driver_register(&rcar_hwspinlock_driver);
++}
++core_initcall(rcar_hwspinlock_init);
++
++static void __exit rcar_hwspinlock_exit(void)
++{
++ platform_driver_unregister(&rcar_hwspinlock_driver);
++}
++module_exit(rcar_hwspinlock_exit);
++
++MODULE_LICENSE("GPL v2");
+--
+1.9.1
+