From d304ad045dbbe3d657886c19962274f9f94fa363 Mon Sep 17 00:00:00 2001 From: Zoltan HERPAI Date: Fri, 22 Sep 2023 18:29:15 +0200 Subject: [PATCH] sifiveu: copy patches from 5.15 to 6.1 To start the upgrade, we copy the patches from 5.15 to 6.1. Signed-off-by: Zoltan HERPAI --- ...40-cpu-1-2-3-4-set-compatible-to-sif.patch | 49 +++ ...e-unmatched-update-regulators-values.patch | 104 ++++++ ...scv-sifive-unmatched-define-PWM-LEDs.patch | 69 ++++ ...ive-unmatched-add-gpio-poweroff-node.patch | 26 ++ ...e-unleashed-define-opp-table-cpufreq.patch | 116 +++++++ .../0006-riscv-sbi-srst-support.patch | 301 ++++++++++++++++++ 6 files changed, 665 insertions(+) create mode 100644 target/linux/sifiveu/patches-6.1/0001-riscv-sifive-fu740-cpu-1-2-3-4-set-compatible-to-sif.patch create mode 100644 target/linux/sifiveu/patches-6.1/0002-riscv-sifive-unmatched-update-regulators-values.patch create mode 100644 target/linux/sifiveu/patches-6.1/0003-riscv-sifive-unmatched-define-PWM-LEDs.patch create mode 100644 target/linux/sifiveu/patches-6.1/0004-riscv-sifive-unmatched-add-gpio-poweroff-node.patch create mode 100644 target/linux/sifiveu/patches-6.1/0005-riscv-sifive-unleashed-define-opp-table-cpufreq.patch create mode 100644 target/linux/sifiveu/patches-6.1/0006-riscv-sbi-srst-support.patch diff --git a/target/linux/sifiveu/patches-6.1/0001-riscv-sifive-fu740-cpu-1-2-3-4-set-compatible-to-sif.patch b/target/linux/sifiveu/patches-6.1/0001-riscv-sifive-fu740-cpu-1-2-3-4-set-compatible-to-sif.patch new file mode 100644 index 00000000000..9a1c9681390 --- /dev/null +++ b/target/linux/sifiveu/patches-6.1/0001-riscv-sifive-fu740-cpu-1-2-3-4-set-compatible-to-sif.patch @@ -0,0 +1,49 @@ +From ab5c8f5492cce16ff2104393e2f1fa64a3ff6e88 Mon Sep 17 00:00:00 2001 +From: David Abdurachmanov +Date: Wed, 17 Feb 2021 06:06:14 -0800 +Subject: [PATCH 1/7] riscv: sifive: fu740: cpu{1,2,3,4} set compatible to + sifive,u74-mc + +Signed-off-by: David Abdurachmanov +--- + arch/riscv/boot/dts/sifive/fu740-c000.dtsi | 8 ++++---- + 1 file changed, 4 insertions(+), 4 deletions(-) + +--- a/arch/riscv/boot/dts/sifive/fu740-c000.dtsi ++++ b/arch/riscv/boot/dts/sifive/fu740-c000.dtsi +@@ -39,7 +39,7 @@ + }; + }; + cpu1: cpu@1 { +- compatible = "sifive,bullet0", "riscv"; ++ compatible = "sifive,u74-mc", "sifive,bullet0", "riscv"; + d-cache-block-size = <64>; + d-cache-sets = <64>; + d-cache-size = <32768>; +@@ -63,7 +63,7 @@ + }; + }; + cpu2: cpu@2 { +- compatible = "sifive,bullet0", "riscv"; ++ compatible = "sifive,u74-mc", "sifive,bullet0", "riscv"; + d-cache-block-size = <64>; + d-cache-sets = <64>; + d-cache-size = <32768>; +@@ -87,7 +87,7 @@ + }; + }; + cpu3: cpu@3 { +- compatible = "sifive,bullet0", "riscv"; ++ compatible = "sifive,u74-mc", "sifive,bullet0", "riscv"; + d-cache-block-size = <64>; + d-cache-sets = <64>; + d-cache-size = <32768>; +@@ -111,7 +111,7 @@ + }; + }; + cpu4: cpu@4 { +- compatible = "sifive,bullet0", "riscv"; ++ compatible = "sifive,u74-mc", "sifive,bullet0", "riscv"; + d-cache-block-size = <64>; + d-cache-sets = <64>; + d-cache-size = <32768>; diff --git a/target/linux/sifiveu/patches-6.1/0002-riscv-sifive-unmatched-update-regulators-values.patch b/target/linux/sifiveu/patches-6.1/0002-riscv-sifive-unmatched-update-regulators-values.patch new file mode 100644 index 00000000000..ac316e9d9b9 --- /dev/null +++ b/target/linux/sifiveu/patches-6.1/0002-riscv-sifive-unmatched-update-regulators-values.patch @@ -0,0 +1,104 @@ +From 657819ff477dd73cd71075609698aa57ba098d8c Mon Sep 17 00:00:00 2001 +From: David Abdurachmanov +Date: Wed, 15 Sep 2021 07:10:02 -0700 +Subject: [PATCH 2/7] riscv: sifive: unmatched: update regulators values + +These are the regulators values from the schematics for Rev3{A,B} boards. + +Note this is not fully correct as bcore1/bcore2 and bmem/bio are merged, but +it's only supported in v5.15 kernel. See: + +541ee8f640327f951e7039278057827322231ab0 ("regulator: da9063: Add support for +full-current mode.") + +This will be changed for v5.15 kernel based on the patch above. + +Signed-off-by: David Abdurachmanov +--- + .../riscv/boot/dts/sifive/hifive-unmatched-a00.dts | 32 +++++++++++----------- + 1 file changed, 16 insertions(+), 16 deletions(-) + +--- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts ++++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts +@@ -73,16 +73,16 @@ + + regulators { + vdd_bcore1: bcore1 { +- regulator-min-microvolt = <900000>; +- regulator-max-microvolt = <900000>; ++ regulator-min-microvolt = <1050000>; ++ regulator-max-microvolt = <1050000>; + regulator-min-microamp = <5000000>; + regulator-max-microamp = <5000000>; + regulator-always-on; + }; + + vdd_bcore2: bcore2 { +- regulator-min-microvolt = <900000>; +- regulator-max-microvolt = <900000>; ++ regulator-min-microvolt = <1050000>; ++ regulator-max-microvolt = <1050000>; + regulator-min-microamp = <5000000>; + regulator-max-microamp = <5000000>; + regulator-always-on; +@@ -137,48 +137,48 @@ + }; + + vdd_ldo3: ldo3 { +- regulator-min-microvolt = <1800000>; +- regulator-max-microvolt = <1800000>; ++ regulator-min-microvolt = <3300000>; ++ regulator-max-microvolt = <3300000>; + regulator-min-microamp = <200000>; + regulator-max-microamp = <200000>; + regulator-always-on; + }; + + vdd_ldo4: ldo4 { +- regulator-min-microvolt = <1800000>; +- regulator-max-microvolt = <1800000>; ++ regulator-min-microvolt = <2500000>; ++ regulator-max-microvolt = <2500000>; + regulator-min-microamp = <200000>; + regulator-max-microamp = <200000>; + regulator-always-on; + }; + + vdd_ldo5: ldo5 { +- regulator-min-microvolt = <1800000>; +- regulator-max-microvolt = <1800000>; ++ regulator-min-microvolt = <3300000>; ++ regulator-max-microvolt = <3300000>; + regulator-min-microamp = <100000>; + regulator-max-microamp = <100000>; + regulator-always-on; + }; + + vdd_ldo6: ldo6 { +- regulator-min-microvolt = <3300000>; +- regulator-max-microvolt = <3300000>; ++ regulator-min-microvolt = <1800000>; ++ regulator-max-microvolt = <1800000>; + regulator-min-microamp = <200000>; + regulator-max-microamp = <200000>; + regulator-always-on; + }; + + vdd_ldo7: ldo7 { +- regulator-min-microvolt = <1800000>; +- regulator-max-microvolt = <1800000>; ++ regulator-min-microvolt = <3300000>; ++ regulator-max-microvolt = <3300000>; + regulator-min-microamp = <200000>; + regulator-max-microamp = <200000>; + regulator-always-on; + }; + + vdd_ldo8: ldo8 { +- regulator-min-microvolt = <1800000>; +- regulator-max-microvolt = <1800000>; ++ regulator-min-microvolt = <3300000>; ++ regulator-max-microvolt = <3300000>; + regulator-min-microamp = <200000>; + regulator-max-microamp = <200000>; + regulator-always-on; diff --git a/target/linux/sifiveu/patches-6.1/0003-riscv-sifive-unmatched-define-PWM-LEDs.patch b/target/linux/sifiveu/patches-6.1/0003-riscv-sifive-unmatched-define-PWM-LEDs.patch new file mode 100644 index 00000000000..661e15905f9 --- /dev/null +++ b/target/linux/sifiveu/patches-6.1/0003-riscv-sifive-unmatched-define-PWM-LEDs.patch @@ -0,0 +1,69 @@ +From 2c2d8ac8c124a2938c9326c14b2dffd46d76b4a8 Mon Sep 17 00:00:00 2001 +From: David Abdurachmanov +Date: Mon, 13 Sep 2021 02:15:37 -0700 +Subject: [PATCH 3/7] riscv: sifive: unmatched: define PWM LEDs + +Add D2 (RGB) and D12 (green) LEDs for SiFive Unmatched board. + +Signed-off-by: David Abdurachmanov +--- + .../riscv/boot/dts/sifive/hifive-unmatched-a00.dts | 41 ++++++++++++++++++++++ + 1 file changed, 41 insertions(+) + +--- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts ++++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts +@@ -4,6 +4,8 @@ + #include "fu740-c000.dtsi" + #include + #include ++#include ++#include + + /* Clock frequency (in Hz) of the PCB crystal for rtcclk */ + #define RTCCLK_FREQ 1000000 +@@ -31,6 +33,45 @@ + soc { + }; + ++ pwmleds { ++ compatible = "pwm-leds"; ++ green-d12 { ++ label = "green:d12"; ++ color = ; ++ pwms = <&pwm0 0 7812500 PWM_POLARITY_INVERTED>; ++ active-low = <1>; ++ max-brightness = <255>; ++ linux,default-trigger = "none"; ++ }; ++ ++ green-d2 { ++ label = "green:d2"; ++ color = ; ++ pwms = <&pwm0 1 7812500 PWM_POLARITY_INVERTED>; ++ active-low = <1>; ++ max-brightness = <255>; ++ linux,default-trigger = "none"; ++ }; ++ ++ red-d2 { ++ label = "red:d2"; ++ color = ; ++ pwms = <&pwm0 2 7812500 PWM_POLARITY_INVERTED>; ++ active-low = <1>; ++ max-brightness = <255>; ++ linux,default-trigger = "none"; ++ }; ++ ++ blue-d2 { ++ label = "blue:d2"; ++ color = ; ++ pwms = <&pwm0 3 7812500 PWM_POLARITY_INVERTED>; ++ active-low = <1>; ++ max-brightness = <255>; ++ linux,default-trigger = "none"; ++ }; ++ }; ++ + hfclk: hfclk { + #clock-cells = <0>; + compatible = "fixed-clock"; diff --git a/target/linux/sifiveu/patches-6.1/0004-riscv-sifive-unmatched-add-gpio-poweroff-node.patch b/target/linux/sifiveu/patches-6.1/0004-riscv-sifive-unmatched-add-gpio-poweroff-node.patch new file mode 100644 index 00000000000..6d09628cb3b --- /dev/null +++ b/target/linux/sifiveu/patches-6.1/0004-riscv-sifive-unmatched-add-gpio-poweroff-node.patch @@ -0,0 +1,26 @@ +From 14ede57943bc4209755d08daf93ac7be967d7fbe Mon Sep 17 00:00:00 2001 +From: David Abdurachmanov +Date: Mon, 13 Sep 2021 02:18:30 -0700 +Subject: [PATCH 4/7] riscv: sifive: unmatched: add gpio-poweroff node + +Add gpio-poweroff node to allow powering off the system. + +Signed-off-by: David Abdurachmanov +--- + arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts | 6 ++++++ + 1 file changed, 6 insertions(+) + +--- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts ++++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts +@@ -85,6 +85,11 @@ + clock-frequency = ; + clock-output-names = "rtcclk"; + }; ++ ++ gpio-poweroff { ++ compatible = "gpio-poweroff"; ++ gpios = <&gpio 2 GPIO_ACTIVE_LOW>; ++ }; + }; + + &uart0 { diff --git a/target/linux/sifiveu/patches-6.1/0005-riscv-sifive-unleashed-define-opp-table-cpufreq.patch b/target/linux/sifiveu/patches-6.1/0005-riscv-sifive-unleashed-define-opp-table-cpufreq.patch new file mode 100644 index 00000000000..c6b997dbbed --- /dev/null +++ b/target/linux/sifiveu/patches-6.1/0005-riscv-sifive-unleashed-define-opp-table-cpufreq.patch @@ -0,0 +1,116 @@ +From d3cf2859a056273400fbdf9d389b75750ff6ca5e Mon Sep 17 00:00:00 2001 +From: David Abdurachmanov +Date: Fri, 14 May 2021 05:27:51 -0700 +Subject: [PATCH 6/7] riscv: sifive: unleashed: define opp table (cpufreq) + +Source: https://github.com/sifive/riscv-linux/commits/dev/paulw/cpufreq-dt-aloe-v5.3-rc4 + +Signed-off-by: David Abdurachmanov +--- + arch/riscv/Kconfig | 8 +++++ + arch/riscv/boot/dts/sifive/fu540-c000.dtsi | 5 ++++ + .../riscv/boot/dts/sifive/hifive-unleashed-a00.dts | 34 ++++++++++++++++++++++ + 3 files changed, 47 insertions(+) + +--- a/arch/riscv/Kconfig ++++ b/arch/riscv/Kconfig +@@ -566,6 +566,14 @@ config BUILTIN_DTB + depends on OF + default y if XIP_KERNEL + ++menu "CPU Power Management" ++ ++source "drivers/cpuidle/Kconfig" ++ ++source "drivers/cpufreq/Kconfig" ++ ++endmenu ++ + menu "Power management options" + + source "kernel/power/Kconfig" +--- a/arch/riscv/boot/dts/sifive/fu540-c000.dtsi ++++ b/arch/riscv/boot/dts/sifive/fu540-c000.dtsi +@@ -30,6 +30,7 @@ + i-cache-size = <16384>; + reg = <0>; + riscv,isa = "rv64imac"; ++ clocks = <&prci PRCI_CLK_COREPLL>; + status = "disabled"; + cpu0_intc: interrupt-controller { + #interrupt-cells = <1>; +@@ -54,6 +55,7 @@ + reg = <1>; + riscv,isa = "rv64imafdc"; + tlb-split; ++ clocks = <&prci PRCI_CLK_COREPLL>; + next-level-cache = <&l2cache>; + cpu1_intc: interrupt-controller { + #interrupt-cells = <1>; +@@ -78,6 +80,7 @@ + reg = <2>; + riscv,isa = "rv64imafdc"; + tlb-split; ++ clocks = <&prci PRCI_CLK_COREPLL>; + next-level-cache = <&l2cache>; + cpu2_intc: interrupt-controller { + #interrupt-cells = <1>; +@@ -102,6 +105,7 @@ + reg = <3>; + riscv,isa = "rv64imafdc"; + tlb-split; ++ clocks = <&prci PRCI_CLK_COREPLL>; + next-level-cache = <&l2cache>; + cpu3_intc: interrupt-controller { + #interrupt-cells = <1>; +@@ -126,6 +130,7 @@ + reg = <4>; + riscv,isa = "rv64imafdc"; + tlb-split; ++ clocks = <&prci PRCI_CLK_COREPLL>; + next-level-cache = <&l2cache>; + cpu4_intc: interrupt-controller { + #interrupt-cells = <1>; +--- a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts ++++ b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts +@@ -84,6 +84,40 @@ + label = "d4"; + }; + }; ++ ++ fu540_c000_opp_table: opp-table { ++ compatible = "operating-points-v2"; ++ opp-shared; ++ ++ opp-350000000 { ++ opp-hz = /bits/ 64 <350000000>; ++ }; ++ opp-700000000 { ++ opp-hz = /bits/ 64 <700000000>; ++ }; ++ opp-999999999 { ++ opp-hz = /bits/ 64 <999999999>; ++ }; ++ opp-1400000000 { ++ opp-hz = /bits/ 64 <1400000000>; ++ }; ++ }; ++}; ++ ++&cpu0 { ++ operating-points-v2 = <&fu540_c000_opp_table>; ++}; ++&cpu1 { ++ operating-points-v2 = <&fu540_c000_opp_table>; ++}; ++&cpu2 { ++ operating-points-v2 = <&fu540_c000_opp_table>; ++}; ++&cpu3 { ++ operating-points-v2 = <&fu540_c000_opp_table>; ++}; ++&cpu4 { ++ operating-points-v2 = <&fu540_c000_opp_table>; + }; + + &uart0 { diff --git a/target/linux/sifiveu/patches-6.1/0006-riscv-sbi-srst-support.patch b/target/linux/sifiveu/patches-6.1/0006-riscv-sbi-srst-support.patch new file mode 100644 index 00000000000..409001bcfa8 --- /dev/null +++ b/target/linux/sifiveu/patches-6.1/0006-riscv-sbi-srst-support.patch @@ -0,0 +1,301 @@ +From mboxrd@z Thu Jan 1 00:00:00 1970 +Return-Path: +X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on + aws-us-west-2-korg-lkml-1.web.codeaurora.org +X-Spam-Level: +X-Spam-Status: No, score=-21.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, + DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, + INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,MSGID_FROM_MTA_HEADER, + SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable + autolearn_force=no version=3.4.0 +Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) + by smtp.lore.kernel.org (Postfix) with ESMTP id 9A34CC48BCD + for ; 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Wed, 9 Jun 2021 + 12:13:47 +0000 +From: Anup Patel +To: Palmer Dabbelt , + Palmer Dabbelt , + Paul Walmsley , Albert Ou +Cc: Atish Patra , + Alistair Francis , + Anup Patel , linux-riscv@lists.infradead.org, + linux-kernel@vger.kernel.org, Anup Patel +Subject: [PATCH v7 1/1] RISC-V: Use SBI SRST extension when available +Date: Wed, 9 Jun 2021 17:43:22 +0530 +Message-Id: <20210609121322.3058-2-anup.patel@wdc.com> +X-Mailer: git-send-email 2.25.1 +In-Reply-To: <20210609121322.3058-1-anup.patel@wdc.com> +References: <20210609121322.3058-1-anup.patel@wdc.com> +X-Originating-IP: [122.172.176.125] +X-ClientProxiedBy: MA1PR0101CA0036.INDPRD01.PROD.OUTLOOK.COM + (2603:1096:a00:22::22) To CO6PR04MB7812.namprd04.prod.outlook.com + (2603:10b6:303:138::6) +MIME-Version: 1.0 +X-MS-Exchange-MessageSentRepresentingType: 1 +Received: from wdc.com (122.172.176.125) by + MA1PR0101CA0036.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a00:22::22) with + Microsoft SMTP Server (version=TLS1_2, + cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4219.21 via Frontend + Transport; 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charset="us-ascii" +Content-Transfer-Encoding: 7bit +Sender: "linux-riscv" +Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org + +The SBI SRST extension provides a standard way to poweroff and +reboot the system irrespective to whether Linux RISC-V S-mode +is running natively (HS-mode) or inside Guest/VM (VS-mode). + +The SBI SRST extension is available in the SBI v0.3 specification. +(Refer, https://github.com/riscv/riscv-sbi-doc/releases/tag/v0.3.0-rc1) + +This patch extends Linux RISC-V SBI implementation to detect +and use SBI SRST extension. + +Signed-off-by: Anup Patel +Reviewed-by: Atish Patra +--- + arch/riscv/include/asm/sbi.h | 24 ++++++++++++++++++++++++ + arch/riscv/kernel/sbi.c | 35 +++++++++++++++++++++++++++++++++++ + 2 files changed, 59 insertions(+) + +--- a/arch/riscv/include/asm/sbi.h ++++ b/arch/riscv/include/asm/sbi.h +@@ -27,6 +27,7 @@ enum sbi_ext_id { + SBI_EXT_IPI = 0x735049, + SBI_EXT_RFENCE = 0x52464E43, + SBI_EXT_HSM = 0x48534D, ++ SBI_EXT_SRST = 0x53525354, + }; + + enum sbi_ext_base_fid { +@@ -70,6 +71,21 @@ enum sbi_hsm_hart_status { + SBI_HSM_HART_STATUS_STOP_PENDING, + }; + ++enum sbi_ext_srst_fid { ++ SBI_EXT_SRST_RESET = 0, ++}; ++ ++enum sbi_srst_reset_type { ++ SBI_SRST_RESET_TYPE_SHUTDOWN = 0, ++ SBI_SRST_RESET_TYPE_COLD_REBOOT, ++ SBI_SRST_RESET_TYPE_WARM_REBOOT, ++}; ++ ++enum sbi_srst_reset_reason { ++ SBI_SRST_RESET_REASON_NONE = 0, ++ SBI_SRST_RESET_REASON_SYS_FAILURE, ++}; ++ + #define SBI_SPEC_VERSION_DEFAULT 0x1 + #define SBI_SPEC_VERSION_MAJOR_SHIFT 24 + #define SBI_SPEC_VERSION_MAJOR_MASK 0x7f +@@ -148,6 +164,14 @@ static inline unsigned long sbi_minor_ve + return sbi_spec_version & SBI_SPEC_VERSION_MINOR_MASK; + } + ++/* Make SBI version */ ++static inline unsigned long sbi_mk_version(unsigned long major, ++ unsigned long minor) ++{ ++ return ((major & SBI_SPEC_VERSION_MAJOR_MASK) << ++ SBI_SPEC_VERSION_MAJOR_SHIFT) | minor; ++} ++ + int sbi_err_map_linux_errno(int err); + #else /* CONFIG_RISCV_SBI */ + static inline int sbi_remote_fence_i(const unsigned long *hart_mask) { return -1; } +--- a/arch/riscv/kernel/sbi.c ++++ b/arch/riscv/kernel/sbi.c +@@ -7,6 +7,7 @@ + + #include + #include ++#include + #include + #include + +@@ -501,6 +502,32 @@ int sbi_remote_hfence_vvma_asid(const un + } + EXPORT_SYMBOL(sbi_remote_hfence_vvma_asid); + ++static void sbi_srst_reset(unsigned long type, unsigned long reason) ++{ ++ sbi_ecall(SBI_EXT_SRST, SBI_EXT_SRST_RESET, type, reason, ++ 0, 0, 0, 0); ++ pr_warn("%s: type=0x%lx reason=0x%lx failed\n", ++ __func__, type, reason); ++} ++ ++static int sbi_srst_reboot(struct notifier_block *this, ++ unsigned long mode, void *cmd) ++{ ++ sbi_srst_reset((mode == REBOOT_WARM || mode == REBOOT_SOFT) ? ++ SBI_SRST_RESET_TYPE_WARM_REBOOT : ++ SBI_SRST_RESET_TYPE_COLD_REBOOT, ++ SBI_SRST_RESET_REASON_NONE); ++ return NOTIFY_DONE; ++} ++ ++static struct notifier_block sbi_srst_reboot_nb; ++ ++static void sbi_srst_power_off(void) ++{ ++ sbi_srst_reset(SBI_SRST_RESET_TYPE_SHUTDOWN, ++ SBI_SRST_RESET_REASON_NONE); ++} ++ + /** + * sbi_probe_extension() - Check if an SBI extension ID is supported or not. + * @extid: The extension ID to be probed. +@@ -608,6 +635,14 @@ void __init sbi_init(void) + } else { + __sbi_rfence = __sbi_rfence_v01; + } ++ if ((sbi_spec_version >= sbi_mk_version(0, 3)) && ++ (sbi_probe_extension(SBI_EXT_SRST) > 0)) { ++ pr_info("SBI SRST extension detected\n"); ++ pm_power_off = sbi_srst_power_off; ++ sbi_srst_reboot_nb.notifier_call = sbi_srst_reboot; ++ sbi_srst_reboot_nb.priority = 192; ++ register_restart_handler(&sbi_srst_reboot_nb); ++ } + } else { + __sbi_set_timer = __sbi_set_timer_v01; + __sbi_send_ipi = __sbi_send_ipi_v01;