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

[Xinliang Liu]

Add hi6220 media subsystem reset controller.

Signed-off-by: Chen Feng <puck.c...@hisilicon.com>
Signed-off-by: Xia Qing <saberlily....@hisilicon.com>
Signed-off-by: Xinliang Liu <xinliang....@linaro.org>
---
 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