linux-kernel - [PATCH v4 8/9] ARM: nspire: Use syscon-reboot to handle restart

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Date:   Tue, 1 Nov 2022 16:58:03 -0500
From:   Andrew Davis <afd@...com>
To:     Lee Jones <lee@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Daniel Tang <dt.tangr@...il.com>,
        Fabian Vogt <fabian@...ter-vogt.de>
CC:     <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Andrew Davis <afd@...com>
Subject: [PATCH v4 8/9] ARM: nspire: Use syscon-reboot to handle restart

Writing this bit can be handled by the DT syscon-reboot driver.
Enable that driver and remove the machine_desc version.

Signed-off-by: Andrew Davis <afd@...com>
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
Tested-by: Fabian Vogt <fabian@...ter-vogt.de>
Reviewed-by: Fabian Vogt <fabian@...ter-vogt.de>
---
 arch/arm/mach-nspire/Kconfig  |  2 ++
 arch/arm/mach-nspire/mmio.h   |  3 ---
 arch/arm/mach-nspire/nspire.c | 10 ----------
 3 files changed, 2 insertions(+), 13 deletions(-)

diff --git a/arch/arm/mach-nspire/Kconfig b/arch/arm/mach-nspire/Kconfig
index b7a3871876d75..0ffdcaca1e6b4 100644
--- a/arch/arm/mach-nspire/Kconfig
+++ b/arch/arm/mach-nspire/Kconfig
@@ -9,5 +9,7 @@ config ARCH_NSPIRE
 	select ARM_VIC
 	select ARM_TIMER_SP804
 	select NSPIRE_TIMER
+	select POWER_RESET
+	select POWER_RESET_SYSCON
 	help
 	  This enables support for systems using the TI-NSPIRE CPU
diff --git a/arch/arm/mach-nspire/mmio.h b/arch/arm/mach-nspire/mmio.h
index 48e32f13f3119..2ce0656139ece 100644
--- a/arch/arm/mach-nspire/mmio.h
+++ b/arch/arm/mach-nspire/mmio.h
@@ -5,9 +5,6 @@
  *	Copyright (C) 2013 Daniel Tang <tangrs@...grs.id.au>
  */
 
-#define NSPIRE_MISC_PHYS_BASE		0x900A0000
-#define NSPIRE_MISC_HWRESET		0x08
-
 #define NSPIRE_PWR_PHYS_BASE		0x900B0000
 #define NSPIRE_PWR_VIRT_BASE		0xFEEB0000
 #define NSPIRE_PWR_BUS_DISABLE1		0x18
diff --git a/arch/arm/mach-nspire/nspire.c b/arch/arm/mach-nspire/nspire.c
index 2d4abb0288b9d..1e13337972dd5 100644
--- a/arch/arm/mach-nspire/nspire.c
+++ b/arch/arm/mach-nspire/nspire.c
@@ -27,16 +27,6 @@ static const char *const nspire_dt_match[] __initconst = {
 	NULL,
 };
 
-static void nspire_restart(enum reboot_mode mode, const char *cmd)
-{
-	void __iomem *base = ioremap(NSPIRE_MISC_PHYS_BASE, SZ_4K);
-	if (!base)
-		return;
-
-	writel(2, base + NSPIRE_MISC_HWRESET);
-}
-
 DT_MACHINE_START(NSPIRE, "TI-NSPIRE")
 	.dt_compat	= nspire_dt_match,
-	.restart	= nspire_restart,
 MACHINE_END
-- 
2.37.3