Commit 82327b12 authored by Hal Feng's avatar Hal Feng Committed by Conor Dooley
Browse files

reset: starfive: Add StarFive JH7110 reset driver 



Add auxiliary driver to support StarFive JH7110 system
and always-on resets.

Tested-by: default avatarTommaso Merciai <tomm.merciai@gmail.com>
Reviewed-by: default avatarEmil Renner Berthing <emil.renner.berthing@canonical.com>
Signed-off-by: default avatarHal Feng <hal.feng@starfivetech.com>
Signed-off-by: default avatarConor Dooley <conor.dooley@microchip.com>
parent b2ab3c94

drivers/reset/starfive/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -10,3 +10,11 @@ config RESET_STARFIVE_JH7100 
	default ARCH_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 ARCH_STARFIVE

	help

	  This enables the reset controller driver for the StarFive JH7110 SoC.

drivers/reset/starfive/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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

drivers/reset/starfive/reset-starfive-jh7110.c

0 → 100644
+70 −0
Original line number Diff line number Diff line 
// 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>



struct jh7110_reset_info {

	unsigned int nr_resets;

	unsigned int assert_offset;

	unsigned int status_offset;

};



static const struct jh7110_reset_info jh7110_sys_info = {

	.nr_resets = JH7110_SYSRST_END,

	.assert_offset = 0x2F8,

	.status_offset = 0x308,

};



static const struct jh7110_reset_info jh7110_aon_info = {

	.nr_resets = JH7110_AONRST_END,

	.assert_offset = 0x38,

	.status_offset = 0x3C,

};



static int jh7110_reset_probe(struct auxiliary_device *adev,

			      const struct auxiliary_device_id *id)

{

	struct jh7110_reset_info *info = (struct jh7110_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 auxiliary_device_id jh7110_reset_ids[] = {

	{

		.name = "clk_starfive_jh7110_sys.rst-sys",

		.driver_data = (kernel_ulong_t)&jh7110_sys_info,

	},

	{

		.name = "clk_starfive_jh7110_sys.rst-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@starfivetech.com>");

MODULE_DESCRIPTION("StarFive JH7110 reset driver");

MODULE_LICENSE("GPL");