From ab52b599c197b5e50ad918f8084673d9b4caed83 Mon Sep 17 00:00:00 2001 From: Xinliang Liu Date: Mon, 20 Jun 2016 11:50:07 +0800 Subject: reset: hisilicon: Add hi6220 media subsystem reset support Add hi6220 media subsystem reset controller. Signed-off-by: Chen Feng Signed-off-by: Xia Qing Signed-off-by: Xinliang Liu Signed-off-by: Philipp Zabel --- drivers/reset/hisilicon/hi6220_reset.c | 49 ++++++++++++++++++++++++++++++++-- 1 file changed, 47 insertions(+), 2 deletions(-) (limited to 'drivers/reset') 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 */ }, }; -- cgit v1.2.3-59-g8ed1b