Add auxiliary driver to support StarFive JH7110 system and always-on resets. Reported-by: kernel test robot <lkp@xxxxxxxxx> Signed-off-by: Hal Feng <hal.feng@xxxxxxxxxxxxxxxx> --- drivers/reset/starfive/Kconfig | 8 +++ drivers/reset/starfive/Makefile | 1 + .../reset/starfive/reset-starfive-jh7110.c | 64 +++++++++++++++++++ .../reset/starfive/reset-starfive-jh71x0.h | 6 ++ 4 files changed, 79 insertions(+) create mode 100644 drivers/reset/starfive/reset-starfive-jh7110.c diff --git a/drivers/reset/starfive/Kconfig b/drivers/reset/starfive/Kconfig index 9d15c4110e40..fab1a081af17 100644 --- a/drivers/reset/starfive/Kconfig +++ b/drivers/reset/starfive/Kconfig @@ -10,3 +10,11 @@ config RESET_STARFIVE_JH7100 default SOC_STARFIVE help This enables the reset controller driver for the StarFive JH7100 SoC. + +config RESET_STARFIVE_JH7110 + bool "StarFive JH7110 Reset Driver" + depends on AUXILIARY_BUS && CLK_STARFIVE_JH7110_SYS + select RESET_STARFIVE_JH71X0 + default CLK_STARFIVE_JH7110_SYS + help + This enables the reset controller driver for the StarFive JH7110 SoC. diff --git a/drivers/reset/starfive/Makefile b/drivers/reset/starfive/Makefile index f6aa12466fad..7a44b66fb9d5 100644 --- a/drivers/reset/starfive/Makefile +++ b/drivers/reset/starfive/Makefile @@ -2,3 +2,4 @@ obj-$(CONFIG_RESET_STARFIVE_JH71X0) += reset-starfive-jh71x0.o obj-$(CONFIG_RESET_STARFIVE_JH7100) += reset-starfive-jh7100.o +obj-$(CONFIG_RESET_STARFIVE_JH7110) += reset-starfive-jh7110.o diff --git a/drivers/reset/starfive/reset-starfive-jh7110.c b/drivers/reset/starfive/reset-starfive-jh7110.c new file mode 100644 index 000000000000..83577d1b7fc6 --- /dev/null +++ b/drivers/reset/starfive/reset-starfive-jh7110.c @@ -0,0 +1,64 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Reset driver for the StarFive JH7110 SoC + * + * Copyright (C) 2022 StarFive Technology Co., Ltd. + */ + +#include <linux/auxiliary_bus.h> + +#include "reset-starfive-jh71x0.h" + +#include <dt-bindings/reset/starfive,jh7110-crg.h> + +static int jh7110_reset_probe(struct auxiliary_device *adev, + const struct auxiliary_device_id *id) +{ + struct reset_info *info = (struct reset_info *)(id->driver_data); + void __iomem **base = (void __iomem **)dev_get_drvdata(adev->dev.parent); + + if (!info || !base) + return -ENODEV; + + return reset_starfive_jh71x0_register(&adev->dev, adev->dev.parent->of_node, + *base + info->assert_offset, + *base + info->status_offset, + NULL, + info->nr_resets, + NULL); +} + +static const struct reset_info jh7110_sys_info = { + .nr_resets = JH7110_SYSRST_END, + .assert_offset = 0x2F8, + .status_offset = 0x308, +}; + +static const struct reset_info jh7110_aon_info = { + .nr_resets = JH7110_AONRST_END, + .assert_offset = 0x38, + .status_offset = 0x3C, +}; + +static const struct auxiliary_device_id jh7110_reset_ids[] = { + { + .name = "clk_starfive_jh71x0.reset-sys", + .driver_data = (kernel_ulong_t)&jh7110_sys_info, + }, + { + .name = "clk_starfive_jh71x0.reset-aon", + .driver_data = (kernel_ulong_t)&jh7110_aon_info, + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(auxiliary, jh7110_reset_ids); + +static struct auxiliary_driver jh7110_reset_driver = { + .probe = jh7110_reset_probe, + .id_table = jh7110_reset_ids, +}; +module_auxiliary_driver(jh7110_reset_driver); + +MODULE_AUTHOR("Hal Feng <hal.feng@xxxxxxxxxxxxxxxx>"); +MODULE_DESCRIPTION("StarFive JH7110 reset driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/reset/starfive/reset-starfive-jh71x0.h b/drivers/reset/starfive/reset-starfive-jh71x0.h index db7d39a87f87..e485472e1adc 100644 --- a/drivers/reset/starfive/reset-starfive-jh71x0.h +++ b/drivers/reset/starfive/reset-starfive-jh71x0.h @@ -6,6 +6,12 @@ #ifndef __RESET_STARFIVE_JH71X0_H #define __RESET_STARFIVE_JH71X0_H +struct reset_info { + unsigned int nr_resets; + unsigned int assert_offset; + unsigned int status_offset; +}; + int reset_starfive_jh71x0_register(struct device *dev, struct device_node *of_node, void __iomem *assert, void __iomem *status, const u32 *asserted, unsigned int nr_resets, -- 2.38.1