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reset: hisilicon: Add hi6220 media subsystem reset support 

Add hi6220 media subsystem reset controller.

Signed-off-by: Chen Feng <puck.chen@hisilicon.com>
Signed-off-by: Xia Qing <saberlily.xia@hisilicon.com>
Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
hifive-unleashed-5.1
Xinliang Liu 2016-06-20 11:50:07 +08:00 committed by Philipp Zabel
parent 8768a26cea
commit ab52b599c1
1 changed files with 47 additions and 2 deletions
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49
drivers/reset/hisilicon/hi6220_reset.c
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@ -27,8 +27,17 @@
#define PERIPH_DEASSERT_OFFSET 0x304
#define PERIPH_MAX_INDEX 0x509
#define SC_MEDIA_RSTEN 0x052C
#define SC_MEDIA_RSTDIS 0x0530
#define MEDIA_MAX_INDEX 8
#define to_reset_data(x) container_of(x, struct hi6220_reset_data, rc_dev)
enum hi6220_reset_ctrl_type {
PERIPHERAL,
MEDIA,
};
struct hi6220_reset_data {
struct reset_controller_dev rc_dev;
struct regmap *regmap;
@ -63,10 +72,34 @@ static const struct reset_control_ops hi6220_peripheral_reset_ops = {
.deassert = hi6220_peripheral_deassert,
};
static int hi6220_media_assert(struct reset_controller_dev *rc_dev,
unsigned long idx)
{
struct hi6220_reset_data *data = to_reset_data(rc_dev);
struct regmap *regmap = data->regmap;
return regmap_write(regmap, SC_MEDIA_RSTEN, BIT(idx));
}
static int hi6220_media_deassert(struct reset_controller_dev *rc_dev,
unsigned long idx)
{
struct hi6220_reset_data *data = to_reset_data(rc_dev);
struct regmap *regmap = data->regmap;
return regmap_write(regmap, SC_MEDIA_RSTDIS, BIT(idx));
}
static const struct reset_control_ops hi6220_media_reset_ops = {
.assert = hi6220_media_assert,
.deassert = hi6220_media_deassert,
};
static int hi6220_reset_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct device *dev = &pdev->dev;
enum hi6220_reset_ctrl_type type;
struct hi6220_reset_data *data;
struct regmap *regmap;
@ -74,6 +107,8 @@ static int hi6220_reset_probe(struct platform_device *pdev)
if (!data)
return -ENOMEM;
type = (enum hi6220_reset_ctrl_type)of_device_get_match_data(dev);
regmap = syscon_node_to_regmap(np);
if (IS_ERR(regmap)) {
dev_err(dev, "failed to get reset controller regmap\n");
@ -82,8 +117,13 @@ static int hi6220_reset_probe(struct platform_device *pdev)
data->regmap = regmap;
data->rc_dev.of_node = np;
data->rc_dev.ops = &hi6220_peripheral_reset_ops;
data->rc_dev.nr_resets = PERIPH_MAX_INDEX;
if (type == MEDIA) {
data->rc_dev.ops = &hi6220_media_reset_ops;
data->rc_dev.nr_resets = MEDIA_MAX_INDEX;
} else {
data->rc_dev.ops = &hi6220_peripheral_reset_ops;
data->rc_dev.nr_resets = PERIPH_MAX_INDEX;
}
return reset_controller_register(&data->rc_dev);
}
@ -91,6 +131,11 @@ static int hi6220_reset_probe(struct platform_device *pdev)
static const struct of_device_id hi6220_reset_match[] = {
{
.compatible = "hisilicon,hi6220-sysctrl",
.data = (void *)PERIPHERAL,
},
{
.compatible = "hisilicon,hi6220-mediactrl",
.data = (void *)MEDIA,
},
{ /* sentinel */ },
};