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path: root/drivers/reset/reset-stm32.c
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Diffstat (limited to 'drivers/reset/reset-stm32.c')
-rw-r--r--drivers/reset/reset-stm32.c108
1 files changed, 0 insertions, 108 deletions
diff --git a/drivers/reset/reset-stm32.c b/drivers/reset/reset-stm32.c
deleted file mode 100644
index 3a7c8527e66a..000000000000
--- a/drivers/reset/reset-stm32.c
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- * Copyright (C) Maxime Coquelin 2015
- * Author: Maxime Coquelin <mcoquelin.stm32@gmail.com>
- * License terms: GNU General Public License (GPL), version 2
- *
- * Heavily based on sunxi driver from Maxime Ripard.
- */
-
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/platform_device.h>
-#include <linux/reset-controller.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/types.h>
-
-struct stm32_reset_data {
- spinlock_t lock;
- void __iomem *membase;
- struct reset_controller_dev rcdev;
-};
-
-static int stm32_reset_assert(struct reset_controller_dev *rcdev,
- unsigned long id)
-{
- struct stm32_reset_data *data = container_of(rcdev,
- struct stm32_reset_data,
- rcdev);
- int bank = id / BITS_PER_LONG;
- int offset = id % BITS_PER_LONG;
- unsigned long flags;
- u32 reg;
-
- spin_lock_irqsave(&data->lock, flags);
-
- reg = readl(data->membase + (bank * 4));
- writel(reg | BIT(offset), data->membase + (bank * 4));
-
- spin_unlock_irqrestore(&data->lock, flags);
-
- return 0;
-}
-
-static int stm32_reset_deassert(struct reset_controller_dev *rcdev,
- unsigned long id)
-{
- struct stm32_reset_data *data = container_of(rcdev,
- struct stm32_reset_data,
- rcdev);
- int bank = id / BITS_PER_LONG;
- int offset = id % BITS_PER_LONG;
- unsigned long flags;
- u32 reg;
-
- spin_lock_irqsave(&data->lock, flags);
-
- reg = readl(data->membase + (bank * 4));
- writel(reg & ~BIT(offset), data->membase + (bank * 4));
-
- spin_unlock_irqrestore(&data->lock, flags);
-
- return 0;
-}
-
-static const struct reset_control_ops stm32_reset_ops = {
- .assert = stm32_reset_assert,
- .deassert = stm32_reset_deassert,
-};
-
-static const struct of_device_id stm32_reset_dt_ids[] = {
- { .compatible = "st,stm32-rcc", },
- { /* sentinel */ },
-};
-
-static int stm32_reset_probe(struct platform_device *pdev)
-{
- struct stm32_reset_data *data;
- struct resource *res;
-
- data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- data->membase = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(data->membase))
- return PTR_ERR(data->membase);
-
- spin_lock_init(&data->lock);
-
- data->rcdev.owner = THIS_MODULE;
- data->rcdev.nr_resets = resource_size(res) * 8;
- data->rcdev.ops = &stm32_reset_ops;
- data->rcdev.of_node = pdev->dev.of_node;
-
- return devm_reset_controller_register(&pdev->dev, &data->rcdev);
-}
-
-static struct platform_driver stm32_reset_driver = {
- .probe = stm32_reset_probe,
- .driver = {
- .name = "stm32-rcc-reset",
- .of_match_table = stm32_reset_dt_ids,
- },
-};
-builtin_platform_driver(stm32_reset_driver);

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