[PATCH v3 4/4] reset: hisilicon: Add hi6220 media subsystem reset support

From: Xinliang Liu
Date: Sun Jun 19 2016 - 23:51:41 EST


Add hi6220 media subsystem reset controller.

Signed-off-by: Chen Feng <puck.chen@xxxxxxxxxxxxx>
Signed-off-by: Xia Qing <saberlily.xia@xxxxxxxxxxxxx>
Signed-off-by: Xinliang Liu <xinliang.liu@xxxxxxxxxx>
---
drivers/reset/hisilicon/hi6220_reset.c | 49 ++++++++++++++++++++++++++++++++--
1 file changed, 47 insertions(+), 2 deletions(-)

diff --git a/drivers/reset/hisilicon/hi6220_reset.c b/drivers/reset/hisilicon/hi6220_reset.c
index 686fea9e2c54..35ce53edabf9 100644
--- a/drivers/reset/hisilicon/hi6220_reset.c
+++ b/drivers/reset/hisilicon/hi6220_reset.c
@@ -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 */ },
};
--
2.8.3