From d0b2f91bede3bd5e3d24dd6803e56eee959c1797 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Thu, 20 Oct 2016 00:10:27 -0300 Subject: Linux-libre 4.8.2-gnu --- drivers/reset/hisilicon/hi6220_reset.c | 122 +++++++++++++++++++++++---------- 1 file changed, 86 insertions(+), 36 deletions(-) (limited to 'drivers/reset/hisilicon') diff --git a/drivers/reset/hisilicon/hi6220_reset.c b/drivers/reset/hisilicon/hi6220_reset.c index 8f55fd4a2..35ce53eda 100644 --- a/drivers/reset/hisilicon/hi6220_reset.c +++ b/drivers/reset/hisilicon/hi6220_reset.c @@ -1,7 +1,8 @@ /* * Hisilicon Hi6220 reset controller driver * - * Copyright (c) 2015 Hisilicon Limited. + * Copyright (c) 2016 Linaro Limited. + * Copyright (c) 2015-2016 Hisilicon Limited. * * Author: Feng Chen * @@ -15,81 +16,130 @@ #include #include #include +#include +#include +#include #include #include #include -#define ASSERT_OFFSET 0x300 -#define DEASSERT_OFFSET 0x304 -#define MAX_INDEX 0x509 +#define PERIPH_ASSERT_OFFSET 0x300 +#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 { - void __iomem *assert_base; - void __iomem *deassert_base; - struct reset_controller_dev rc_dev; + struct reset_controller_dev rc_dev; + struct regmap *regmap; }; -static int hi6220_reset_assert(struct reset_controller_dev *rc_dev, - unsigned long idx) +static int hi6220_peripheral_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; + u32 bank = idx >> 8; + u32 offset = idx & 0xff; + u32 reg = PERIPH_ASSERT_OFFSET + bank * 0x10; - int bank = idx >> 8; - int offset = idx & 0xff; + return regmap_write(regmap, reg, BIT(offset)); +} - writel(BIT(offset), data->assert_base + (bank * 0x10)); +static int hi6220_peripheral_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; + u32 bank = idx >> 8; + u32 offset = idx & 0xff; + u32 reg = PERIPH_DEASSERT_OFFSET + bank * 0x10; - return 0; + return regmap_write(regmap, reg, BIT(offset)); } -static int hi6220_reset_deassert(struct reset_controller_dev *rc_dev, - unsigned long idx) +static const struct reset_control_ops hi6220_peripheral_reset_ops = { + .assert = hi6220_peripheral_assert, + .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; - int bank = idx >> 8; - int offset = idx & 0xff; + return regmap_write(regmap, SC_MEDIA_RSTEN, BIT(idx)); +} - writel(BIT(offset), data->deassert_base + (bank * 0x10)); +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 0; + return regmap_write(regmap, SC_MEDIA_RSTDIS, BIT(idx)); } -static const struct reset_control_ops hi6220_reset_ops = { - .assert = hi6220_reset_assert, - .deassert = hi6220_reset_deassert, +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 resource *res; - void __iomem *src_base; + struct regmap *regmap; - data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - src_base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(src_base)) - return PTR_ERR(src_base); + 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"); + return PTR_ERR(regmap); + } - data->assert_base = src_base + ASSERT_OFFSET; - data->deassert_base = src_base + DEASSERT_OFFSET; - data->rc_dev.nr_resets = MAX_INDEX; - data->rc_dev.ops = &hi6220_reset_ops; - data->rc_dev.of_node = pdev->dev.of_node; + data->regmap = regmap; + data->rc_dev.of_node = np; + 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); } static const struct of_device_id hi6220_reset_match[] = { - { .compatible = "hisilicon,hi6220-sysctrl" }, - { }, + { + .compatible = "hisilicon,hi6220-sysctrl", + .data = (void *)PERIPHERAL, + }, + { + .compatible = "hisilicon,hi6220-mediactrl", + .data = (void *)MEDIA, + }, + { /* sentinel */ }, }; +MODULE_DEVICE_TABLE(of, hi6220_reset_match); static struct platform_driver hi6220_reset_driver = { .probe = hi6220_reset_probe, -- cgit v1.2.3-54-g00ecf