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path: root/drivers/reset/reset-sunxi.c
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Diffstat (limited to 'drivers/reset/reset-sunxi.c')
-rw-r--r--drivers/reset/reset-sunxi.c104
1 files changed, 6 insertions, 98 deletions
diff --git a/drivers/reset/reset-sunxi.c b/drivers/reset/reset-sunxi.c
index 2c7dd1f..db9a1a7 100644
--- a/drivers/reset/reset-sunxi.c
+++ b/drivers/reset/reset-sunxi.c
@@ -22,64 +22,11 @@
#include <linux/spinlock.h>
#include <linux/types.h>
-struct sunxi_reset_data {
- spinlock_t lock;
- void __iomem *membase;
- struct reset_controller_dev rcdev;
-};
-
-static int sunxi_reset_assert(struct reset_controller_dev *rcdev,
- unsigned long id)
-{
- struct sunxi_reset_data *data = container_of(rcdev,
- struct sunxi_reset_data,
- rcdev);
- int reg_width = sizeof(u32);
- int bank = id / (reg_width * BITS_PER_BYTE);
- int offset = id % (reg_width * BITS_PER_BYTE);
- unsigned long flags;
- u32 reg;
-
- spin_lock_irqsave(&data->lock, flags);
-
- reg = readl(data->membase + (bank * reg_width));
- writel(reg & ~BIT(offset), data->membase + (bank * reg_width));
-
- spin_unlock_irqrestore(&data->lock, flags);
-
- return 0;
-}
-
-static int sunxi_reset_deassert(struct reset_controller_dev *rcdev,
- unsigned long id)
-{
- struct sunxi_reset_data *data = container_of(rcdev,
- struct sunxi_reset_data,
- rcdev);
- int reg_width = sizeof(u32);
- int bank = id / (reg_width * BITS_PER_BYTE);
- int offset = id % (reg_width * BITS_PER_BYTE);
- unsigned long flags;
- u32 reg;
-
- spin_lock_irqsave(&data->lock, flags);
-
- reg = readl(data->membase + (bank * reg_width));
- writel(reg | BIT(offset), data->membase + (bank * reg_width));
-
- spin_unlock_irqrestore(&data->lock, flags);
-
- return 0;
-}
-
-static const struct reset_control_ops sunxi_reset_ops = {
- .assert = sunxi_reset_assert,
- .deassert = sunxi_reset_deassert,
-};
+#include "reset-simple.h"
static int sunxi_reset_init(struct device_node *np)
{
- struct sunxi_reset_data *data;
+ struct reset_simple_data *data;
struct resource res;
resource_size_t size;
int ret;
@@ -108,8 +55,9 @@ static int sunxi_reset_init(struct device_node *np)
data->rcdev.owner = THIS_MODULE;
data->rcdev.nr_resets = size * 8;
- data->rcdev.ops = &sunxi_reset_ops;
+ data->rcdev.ops = &reset_simple_ops;
data->rcdev.of_node = np;
+ data->active_low = true;
return reset_controller_register(&data->rcdev);
@@ -122,6 +70,8 @@ err_alloc:
* These are the reset controller we need to initialize early on in
* our system, before we can even think of using a regular device
* driver for it.
+ * The controllers that we can register through the regular device
+ * model are handled by the simple reset driver directly.
*/
static const struct of_device_id sunxi_early_reset_dt_ids[] __initconst = {
{ .compatible = "allwinner,sun6i-a31-ahb1-reset", },
@@ -135,45 +85,3 @@ void __init sun6i_reset_init(void)
for_each_matching_node(np, sunxi_early_reset_dt_ids)
sunxi_reset_init(np);
}
-
-/*
- * And these are the controllers we can register through the regular
- * device model.
- */
-static const struct of_device_id sunxi_reset_dt_ids[] = {
- { .compatible = "allwinner,sun6i-a31-clock-reset", },
- { /* sentinel */ },
-};
-
-static int sunxi_reset_probe(struct platform_device *pdev)
-{
- struct sunxi_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 = &sunxi_reset_ops;
- data->rcdev.of_node = pdev->dev.of_node;
-
- return devm_reset_controller_register(&pdev->dev, &data->rcdev);
-}
-
-static struct platform_driver sunxi_reset_driver = {
- .probe = sunxi_reset_probe,
- .driver = {
- .name = "sunxi-reset",
- .of_match_table = sunxi_reset_dt_ids,
- },
-};
-builtin_platform_driver(sunxi_reset_driver);
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