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Message-ID: <20230331103602.k2cpzjwnradftxu3@mercury.elektranox.org>
Date: Fri, 31 Mar 2023 12:36:02 +0200
From: Sebastian Reichel <sebastian.reichel@...labora.com>
To: Neil Armstrong <neil.armstrong@...aro.org>
Cc: Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
soc@...nel.org, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Russell King <linux@...linux.org.uk>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Thomas Gleixner <tglx@...utronix.de>,
Miquel Raynal <miquel.raynal@...tlin.com>,
Richard Weinberger <richard@....at>,
Vignesh Raghavendra <vigneshr@...com>,
Giuseppe Cavallaro <peppe.cavallaro@...com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Jose Abreu <joabreu@...opsys.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <brgl@...ev.pl>,
Philipp Zabel <p.zabel@...gutronix.de>,
Marc Zyngier <maz@...nel.org>,
linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
linux-mtd@...ts.infradead.org, netdev@...r.kernel.org,
linux-stm32@...md-mailman.stormreply.com,
linux-gpio@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH RFC 16/20] power: reset: oxnas-restart: remove obsolete
restart driver
Hi,
On Fri, Mar 31, 2023 at 10:34:54AM +0200, Neil Armstrong wrote:
> Due to lack of maintainance and stall of development for a few years now,
> and since no new features will ever be added upstream, remove support
> for OX810 and OX820 restart feature.
>
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> ---
Acked-by: Sebastian Reichel <sebastian.reichel@...labora.com>
-- Sebastian
> drivers/power/reset/Kconfig | 7 --
> drivers/power/reset/Makefile | 1 -
> drivers/power/reset/oxnas-restart.c | 233 ------------------------------------
> 3 files changed, 241 deletions(-)
>
> diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
> index 8c87eeda0fec..cc734c1fe4c0 100644
> --- a/drivers/power/reset/Kconfig
> +++ b/drivers/power/reset/Kconfig
> @@ -148,13 +148,6 @@ config POWER_RESET_ODROID_GO_ULTRA_POWEROFF
> help
> This driver supports Power off for Odroid Go Ultra device.
>
> -config POWER_RESET_OXNAS
> - bool "OXNAS SoC restart driver"
> - depends on ARCH_OXNAS
> - default MACH_OX820
> - help
> - Restart support for OXNAS/PLXTECH OX820 SoC.
> -
> config POWER_RESET_PIIX4_POWEROFF
> tristate "Intel PIIX4 power-off driver"
> depends on PCI
> diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
> index d763e6735ee3..a95d1bd275d1 100644
> --- a/drivers/power/reset/Makefile
> +++ b/drivers/power/reset/Makefile
> @@ -14,7 +14,6 @@ obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o
> obj-$(CONFIG_POWER_RESET_LINKSTATION) += linkstation-poweroff.o
> obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
> obj-$(CONFIG_POWER_RESET_MT6323) += mt6323-poweroff.o
> -obj-$(CONFIG_POWER_RESET_OXNAS) += oxnas-restart.o
> obj-$(CONFIG_POWER_RESET_QCOM_PON) += qcom-pon.o
> obj-$(CONFIG_POWER_RESET_OCELOT_RESET) += ocelot-reset.o
> obj-$(CONFIG_POWER_RESET_ODROID_GO_ULTRA_POWEROFF) += odroid-go-ultra-poweroff.o
> diff --git a/drivers/power/reset/oxnas-restart.c b/drivers/power/reset/oxnas-restart.c
> deleted file mode 100644
> index 13090bec058a..000000000000
> --- a/drivers/power/reset/oxnas-restart.c
> +++ /dev/null
> @@ -1,233 +0,0 @@
> -// SPDX-License-Identifier: (GPL-2.0)
> -/*
> - * oxnas SoC reset driver
> - * based on:
> - * Microsemi MIPS SoC reset driver
> - * and ox820_assert_system_reset() written by Ma Hajun <mahaijuns@...il.com>
> - *
> - * Copyright (c) 2013 Ma Hajun <mahaijuns@...il.com>
> - * Copyright (c) 2017 Microsemi Corporation
> - * Copyright (c) 2020 Daniel Golle <daniel@...rotopia.org>
> - */
> -#include <linux/delay.h>
> -#include <linux/io.h>
> -#include <linux/notifier.h>
> -#include <linux/mfd/syscon.h>
> -#include <linux/of_address.h>
> -#include <linux/of_device.h>
> -#include <linux/platform_device.h>
> -#include <linux/reboot.h>
> -#include <linux/regmap.h>
> -
> -/* bit numbers of reset control register */
> -#define OX820_SYS_CTRL_RST_SCU 0
> -#define OX820_SYS_CTRL_RST_COPRO 1
> -#define OX820_SYS_CTRL_RST_ARM0 2
> -#define OX820_SYS_CTRL_RST_ARM1 3
> -#define OX820_SYS_CTRL_RST_USBHS 4
> -#define OX820_SYS_CTRL_RST_USBHSPHYA 5
> -#define OX820_SYS_CTRL_RST_MACA 6
> -#define OX820_SYS_CTRL_RST_MAC OX820_SYS_CTRL_RST_MACA
> -#define OX820_SYS_CTRL_RST_PCIEA 7
> -#define OX820_SYS_CTRL_RST_SGDMA 8
> -#define OX820_SYS_CTRL_RST_CIPHER 9
> -#define OX820_SYS_CTRL_RST_DDR 10
> -#define OX820_SYS_CTRL_RST_SATA 11
> -#define OX820_SYS_CTRL_RST_SATA_LINK 12
> -#define OX820_SYS_CTRL_RST_SATA_PHY 13
> -#define OX820_SYS_CTRL_RST_PCIEPHY 14
> -#define OX820_SYS_CTRL_RST_STATIC 15
> -#define OX820_SYS_CTRL_RST_GPIO 16
> -#define OX820_SYS_CTRL_RST_UART1 17
> -#define OX820_SYS_CTRL_RST_UART2 18
> -#define OX820_SYS_CTRL_RST_MISC 19
> -#define OX820_SYS_CTRL_RST_I2S 20
> -#define OX820_SYS_CTRL_RST_SD 21
> -#define OX820_SYS_CTRL_RST_MACB 22
> -#define OX820_SYS_CTRL_RST_PCIEB 23
> -#define OX820_SYS_CTRL_RST_VIDEO 24
> -#define OX820_SYS_CTRL_RST_DDR_PHY 25
> -#define OX820_SYS_CTRL_RST_USBHSPHYB 26
> -#define OX820_SYS_CTRL_RST_USBDEV 27
> -#define OX820_SYS_CTRL_RST_ARMDBG 29
> -#define OX820_SYS_CTRL_RST_PLLA 30
> -#define OX820_SYS_CTRL_RST_PLLB 31
> -
> -/* bit numbers of clock control register */
> -#define OX820_SYS_CTRL_CLK_COPRO 0
> -#define OX820_SYS_CTRL_CLK_DMA 1
> -#define OX820_SYS_CTRL_CLK_CIPHER 2
> -#define OX820_SYS_CTRL_CLK_SD 3
> -#define OX820_SYS_CTRL_CLK_SATA 4
> -#define OX820_SYS_CTRL_CLK_I2S 5
> -#define OX820_SYS_CTRL_CLK_USBHS 6
> -#define OX820_SYS_CTRL_CLK_MACA 7
> -#define OX820_SYS_CTRL_CLK_MAC OX820_SYS_CTRL_CLK_MACA
> -#define OX820_SYS_CTRL_CLK_PCIEA 8
> -#define OX820_SYS_CTRL_CLK_STATIC 9
> -#define OX820_SYS_CTRL_CLK_MACB 10
> -#define OX820_SYS_CTRL_CLK_PCIEB 11
> -#define OX820_SYS_CTRL_CLK_REF600 12
> -#define OX820_SYS_CTRL_CLK_USBDEV 13
> -#define OX820_SYS_CTRL_CLK_DDR 14
> -#define OX820_SYS_CTRL_CLK_DDRPHY 15
> -#define OX820_SYS_CTRL_CLK_DDRCK 16
> -
> -/* Regmap offsets */
> -#define OX820_CLK_SET_REGOFFSET 0x2c
> -#define OX820_CLK_CLR_REGOFFSET 0x30
> -#define OX820_RST_SET_REGOFFSET 0x34
> -#define OX820_RST_CLR_REGOFFSET 0x38
> -#define OX820_SECONDARY_SEL_REGOFFSET 0x14
> -#define OX820_TERTIARY_SEL_REGOFFSET 0x8c
> -#define OX820_QUATERNARY_SEL_REGOFFSET 0x94
> -#define OX820_DEBUG_SEL_REGOFFSET 0x9c
> -#define OX820_ALTERNATIVE_SEL_REGOFFSET 0xa4
> -#define OX820_PULLUP_SEL_REGOFFSET 0xac
> -#define OX820_SEC_SECONDARY_SEL_REGOFFSET 0x100014
> -#define OX820_SEC_TERTIARY_SEL_REGOFFSET 0x10008c
> -#define OX820_SEC_QUATERNARY_SEL_REGOFFSET 0x100094
> -#define OX820_SEC_DEBUG_SEL_REGOFFSET 0x10009c
> -#define OX820_SEC_ALTERNATIVE_SEL_REGOFFSET 0x1000a4
> -#define OX820_SEC_PULLUP_SEL_REGOFFSET 0x1000ac
> -
> -struct oxnas_restart_context {
> - struct regmap *sys_ctrl;
> - struct notifier_block restart_handler;
> -};
> -
> -static int ox820_restart_handle(struct notifier_block *this,
> - unsigned long mode, void *cmd)
> -{
> - struct oxnas_restart_context *ctx = container_of(this, struct
> - oxnas_restart_context,
> - restart_handler);
> - u32 value;
> -
> - /*
> - * Assert reset to cores as per power on defaults
> - * Don't touch the DDR interface as things will come to an impromptu
> - * stop NB Possibly should be asserting reset for PLLB, but there are
> - * timing concerns here according to the docs
> - */
> - value = BIT(OX820_SYS_CTRL_RST_COPRO) |
> - BIT(OX820_SYS_CTRL_RST_USBHS) |
> - BIT(OX820_SYS_CTRL_RST_USBHSPHYA) |
> - BIT(OX820_SYS_CTRL_RST_MACA) |
> - BIT(OX820_SYS_CTRL_RST_PCIEA) |
> - BIT(OX820_SYS_CTRL_RST_SGDMA) |
> - BIT(OX820_SYS_CTRL_RST_CIPHER) |
> - BIT(OX820_SYS_CTRL_RST_SATA) |
> - BIT(OX820_SYS_CTRL_RST_SATA_LINK) |
> - BIT(OX820_SYS_CTRL_RST_SATA_PHY) |
> - BIT(OX820_SYS_CTRL_RST_PCIEPHY) |
> - BIT(OX820_SYS_CTRL_RST_STATIC) |
> - BIT(OX820_SYS_CTRL_RST_UART1) |
> - BIT(OX820_SYS_CTRL_RST_UART2) |
> - BIT(OX820_SYS_CTRL_RST_MISC) |
> - BIT(OX820_SYS_CTRL_RST_I2S) |
> - BIT(OX820_SYS_CTRL_RST_SD) |
> - BIT(OX820_SYS_CTRL_RST_MACB) |
> - BIT(OX820_SYS_CTRL_RST_PCIEB) |
> - BIT(OX820_SYS_CTRL_RST_VIDEO) |
> - BIT(OX820_SYS_CTRL_RST_USBHSPHYB) |
> - BIT(OX820_SYS_CTRL_RST_USBDEV);
> -
> - regmap_write(ctx->sys_ctrl, OX820_RST_SET_REGOFFSET, value);
> -
> - /* Release reset to cores as per power on defaults */
> - regmap_write(ctx->sys_ctrl, OX820_RST_CLR_REGOFFSET,
> - BIT(OX820_SYS_CTRL_RST_GPIO));
> -
> - /*
> - * Disable clocks to cores as per power-on defaults - must leave DDR
> - * related clocks enabled otherwise we'll stop rather abruptly.
> - */
> - value = BIT(OX820_SYS_CTRL_CLK_COPRO) |
> - BIT(OX820_SYS_CTRL_CLK_DMA) |
> - BIT(OX820_SYS_CTRL_CLK_CIPHER) |
> - BIT(OX820_SYS_CTRL_CLK_SD) |
> - BIT(OX820_SYS_CTRL_CLK_SATA) |
> - BIT(OX820_SYS_CTRL_CLK_I2S) |
> - BIT(OX820_SYS_CTRL_CLK_USBHS) |
> - BIT(OX820_SYS_CTRL_CLK_MAC) |
> - BIT(OX820_SYS_CTRL_CLK_PCIEA) |
> - BIT(OX820_SYS_CTRL_CLK_STATIC) |
> - BIT(OX820_SYS_CTRL_CLK_MACB) |
> - BIT(OX820_SYS_CTRL_CLK_PCIEB) |
> - BIT(OX820_SYS_CTRL_CLK_REF600) |
> - BIT(OX820_SYS_CTRL_CLK_USBDEV);
> -
> - regmap_write(ctx->sys_ctrl, OX820_CLK_CLR_REGOFFSET, value);
> -
> - /* Enable clocks to cores as per power-on defaults */
> -
> - /* Set sys-control pin mux'ing as per power-on defaults */
> - regmap_write(ctx->sys_ctrl, OX820_SECONDARY_SEL_REGOFFSET, 0);
> - regmap_write(ctx->sys_ctrl, OX820_TERTIARY_SEL_REGOFFSET, 0);
> - regmap_write(ctx->sys_ctrl, OX820_QUATERNARY_SEL_REGOFFSET, 0);
> - regmap_write(ctx->sys_ctrl, OX820_DEBUG_SEL_REGOFFSET, 0);
> - regmap_write(ctx->sys_ctrl, OX820_ALTERNATIVE_SEL_REGOFFSET, 0);
> - regmap_write(ctx->sys_ctrl, OX820_PULLUP_SEL_REGOFFSET, 0);
> -
> - regmap_write(ctx->sys_ctrl, OX820_SEC_SECONDARY_SEL_REGOFFSET, 0);
> - regmap_write(ctx->sys_ctrl, OX820_SEC_TERTIARY_SEL_REGOFFSET, 0);
> - regmap_write(ctx->sys_ctrl, OX820_SEC_QUATERNARY_SEL_REGOFFSET, 0);
> - regmap_write(ctx->sys_ctrl, OX820_SEC_DEBUG_SEL_REGOFFSET, 0);
> - regmap_write(ctx->sys_ctrl, OX820_SEC_ALTERNATIVE_SEL_REGOFFSET, 0);
> - regmap_write(ctx->sys_ctrl, OX820_SEC_PULLUP_SEL_REGOFFSET, 0);
> -
> - /*
> - * No need to save any state, as the ROM loader can determine whether
> - * reset is due to power cycling or programatic action, just hit the
> - * (self-clearing) CPU reset bit of the block reset register
> - */
> - value =
> - BIT(OX820_SYS_CTRL_RST_SCU) |
> - BIT(OX820_SYS_CTRL_RST_ARM0) |
> - BIT(OX820_SYS_CTRL_RST_ARM1);
> -
> - regmap_write(ctx->sys_ctrl, OX820_RST_SET_REGOFFSET, value);
> -
> - pr_emerg("Unable to restart system\n");
> - return NOTIFY_DONE;
> -}
> -
> -static int ox820_restart_probe(struct platform_device *pdev)
> -{
> - struct oxnas_restart_context *ctx;
> - struct regmap *sys_ctrl;
> - struct device *dev = &pdev->dev;
> - int err = 0;
> -
> - sys_ctrl = syscon_node_to_regmap(pdev->dev.of_node);
> - if (IS_ERR(sys_ctrl))
> - return PTR_ERR(sys_ctrl);
> -
> - ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
> - if (!ctx)
> - return -ENOMEM;
> -
> - ctx->sys_ctrl = sys_ctrl;
> - ctx->restart_handler.notifier_call = ox820_restart_handle;
> - ctx->restart_handler.priority = 192;
> - err = register_restart_handler(&ctx->restart_handler);
> - if (err)
> - dev_err(dev, "can't register restart notifier (err=%d)\n", err);
> -
> - return err;
> -}
> -
> -static const struct of_device_id ox820_restart_of_match[] = {
> - { .compatible = "oxsemi,ox820-sys-ctrl" },
> - {}
> -};
> -
> -static struct platform_driver ox820_restart_driver = {
> - .probe = ox820_restart_probe,
> - .driver = {
> - .name = "ox820-chip-reset",
> - .of_match_table = ox820_restart_of_match,
> - },
> -};
> -builtin_platform_driver(ox820_restart_driver);
>
> --
> 2.34.1
>
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