diff options
Diffstat (limited to 'drivers/reset')
| -rw-r--r-- | drivers/reset/reset-berlin.c | 53 |
1 files changed, 52 insertions, 1 deletions
diff --git a/drivers/reset/reset-berlin.c b/drivers/reset/reset-berlin.c index f8b48a13cf0b..d43bc163dd02 100644 --- a/drivers/reset/reset-berlin.c +++ b/drivers/reset/reset-berlin.c @@ -11,10 +11,12 @@ #include <linux/delay.h> #include <linux/io.h> +#include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/platform_device.h> +#include <linux/regmap.h> #include <linux/reset-controller.h> #include <linux/slab.h> #include <linux/types.h> @@ -27,6 +29,7 @@ struct berlin_reset_priv { void __iomem *base; unsigned int size; + struct regmap *regmap; struct reset_controller_dev rcdev; }; @@ -37,7 +40,10 @@ static int berlin_reset_reset(struct reset_controller_dev *rcdev, int offset = id >> 8; int mask = BIT(id & 0x1f); - writel(mask, priv->base + offset); + if (priv->regmap) + regmap_write(priv->regmap, offset, mask); + else + writel(mask, priv->base + offset); /* let the reset be effective */ udelay(10); @@ -70,6 +76,51 @@ static int berlin_reset_xlate(struct reset_controller_dev *rcdev, return (offset << 8) | bit; } +static int berlin2_reset_probe(struct platform_device *pdev) +{ + struct device_node *parent_np = of_get_parent(pdev->dev.of_node); + struct berlin_reset_priv *priv; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(priv->regmap)) + return PTR_ERR(priv->regmap); + + priv->rcdev.owner = THIS_MODULE; + priv->rcdev.ops = &berlin_reset_ops; + priv->rcdev.of_node = pdev->dev.of_node; + priv->rcdev.of_reset_n_cells = 2; + priv->rcdev.of_xlate = berlin_reset_xlate; + + reset_controller_register(&priv->rcdev); + + return 0; +} + +static const struct of_device_id berlin_reset_dt_match[] = { + { .compatible = "marvell,berlin2-reset" }, + { }, +}; +MODULE_DEVICE_TABLE(of, berlin_reset_dt_match); + +static struct platform_driver berlin_reset_driver = { + .probe = berlin2_reset_probe, + .driver = { + .name = "berlin2-reset", + .of_match_table = berlin_reset_dt_match, + }, +}; +module_platform_driver(berlin_reset_driver); + +MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>"); +MODULE_AUTHOR("Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>"); +MODULE_DESCRIPTION("Marvell Berlin reset driver"); +MODULE_LICENSE("GPL"); + static int __berlin_reset_init(struct device_node *np) { struct berlin_reset_priv *priv; |