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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Guo Ren <guoren@linux.alibaba.com>,
	Anup Patel <anup@brainfault.org>, Marc Zyngier <maz@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Samuel Holland <samuel@sholland.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Sasha Levin <sashal@kernel.org>,
	paul.walmsley@sifive.com, aou@eecs.berkeley.edu,
	linux-riscv@lists.infradead.org
Subject: [PATCH AUTOSEL 4.19 03/11] irqchip/sifive-plic: Add missing thead, c900-plic match string
Date: Tue, 15 Feb 2022 10:30:56 -0500	[thread overview]
Message-ID: <20220215153104.581786-3-sashal@kernel.org> (raw)
In-Reply-To: <20220215153104.581786-1-sashal@kernel.org>

From: Guo Ren <guoren@linux.alibaba.com>

[ Upstream commit 1d4df649cbb4b26d19bea38ecff4b65b10a1bbca ]

The thead,c900-plic has been used in opensbi to distinguish
PLIC [1]. Although PLICs have the same behaviors in Linux,
they are different hardware with some custom initializing in
firmware(opensbi).

Qute opensbi patch commit-msg by Samuel:

  The T-HEAD PLIC implementation requires setting a delegation bit
  to allow access from S-mode. Now that the T-HEAD PLIC has its own
  compatible string, set this bit automatically from the PLIC driver,
  instead of reaching into the PLIC's MMIO space from another driver.

[1]: https://github.com/riscv-software-src/opensbi/commit/78c2b19218bd62653b9fb31623a42ced45f38ea6

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Anup Patel <anup@brainfault.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Samuel Holland <samuel@sholland.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220130135634.1213301-3-guoren@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/irqchip/irq-sifive-plic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c
index 532e9d68c7042..767cdd3f773bb 100644
--- a/drivers/irqchip/irq-sifive-plic.c
+++ b/drivers/irqchip/irq-sifive-plic.c
@@ -258,3 +258,4 @@ static int __init plic_init(struct device_node *node,
 
 IRQCHIP_DECLARE(sifive_plic, "sifive,plic-1.0.0", plic_init);
 IRQCHIP_DECLARE(riscv_plic0, "riscv,plic0", plic_init); /* for legacy systems */
+IRQCHIP_DECLARE(thead_c900_plic, "thead,c900-plic", plic_init); /* for firmware driver */
-- 
2.34.1


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WARNING: multiple messages have this Message-ID (diff)
From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Guo Ren <guoren@linux.alibaba.com>,
	Anup Patel <anup@brainfault.org>, Marc Zyngier <maz@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Samuel Holland <samuel@sholland.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Sasha Levin <sashal@kernel.org>,
	paul.walmsley@sifive.com, aou@eecs.berkeley.edu,
	linux-riscv@lists.infradead.org
Subject: [PATCH AUTOSEL 4.19 03/11] irqchip/sifive-plic: Add missing thead,c900-plic match string
Date: Tue, 15 Feb 2022 10:30:56 -0500	[thread overview]
Message-ID: <20220215153104.581786-3-sashal@kernel.org> (raw)
In-Reply-To: <20220215153104.581786-1-sashal@kernel.org>

From: Guo Ren <guoren@linux.alibaba.com>

[ Upstream commit 1d4df649cbb4b26d19bea38ecff4b65b10a1bbca ]

The thead,c900-plic has been used in opensbi to distinguish
PLIC [1]. Although PLICs have the same behaviors in Linux,
they are different hardware with some custom initializing in
firmware(opensbi).

Qute opensbi patch commit-msg by Samuel:

  The T-HEAD PLIC implementation requires setting a delegation bit
  to allow access from S-mode. Now that the T-HEAD PLIC has its own
  compatible string, set this bit automatically from the PLIC driver,
  instead of reaching into the PLIC's MMIO space from another driver.

[1]: https://github.com/riscv-software-src/opensbi/commit/78c2b19218bd62653b9fb31623a42ced45f38ea6

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Anup Patel <anup@brainfault.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Samuel Holland <samuel@sholland.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220130135634.1213301-3-guoren@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/irqchip/irq-sifive-plic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c
index 532e9d68c7042..767cdd3f773bb 100644
--- a/drivers/irqchip/irq-sifive-plic.c
+++ b/drivers/irqchip/irq-sifive-plic.c
@@ -258,3 +258,4 @@ static int __init plic_init(struct device_node *node,
 
 IRQCHIP_DECLARE(sifive_plic, "sifive,plic-1.0.0", plic_init);
 IRQCHIP_DECLARE(riscv_plic0, "riscv,plic0", plic_init); /* for legacy systems */
+IRQCHIP_DECLARE(thead_c900_plic, "thead,c900-plic", plic_init); /* for firmware driver */
-- 
2.34.1


  parent reply	other threads:[~2022-02-15 15:58 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-15 15:30 [PATCH AUTOSEL 4.19 01/11] ARM: OMAP2+: hwmod: Add of_node_put() before break Sasha Levin
2022-02-15 15:30 ` Sasha Levin
2022-02-15 15:30 ` [PATCH AUTOSEL 4.19 02/11] usb: usb251xb: add boost-up property support Sasha Levin
2022-02-15 15:30 ` Sasha Levin [this message]
2022-02-15 15:30   ` [PATCH AUTOSEL 4.19 03/11] irqchip/sifive-plic: Add missing thead,c900-plic match string Sasha Levin
2022-02-20  9:54   ` Pavel Machek
2022-02-20  9:54     ` Pavel Machek
2022-02-20 11:05     ` Marc Zyngier
2022-02-20 11:05       ` Marc Zyngier
2022-02-15 15:30 ` [PATCH AUTOSEL 4.19 04/11] netfilter: conntrack: don't refresh sctp entries in closed state Sasha Levin
2022-02-15 15:30 ` [PATCH AUTOSEL 4.19 05/11] arm64: dts: meson-gx: add ATF BL32 reserved-memory region Sasha Levin
2022-02-15 15:30   ` Sasha Levin
2022-02-15 15:30   ` Sasha Levin
2022-02-15 15:30 ` [PATCH AUTOSEL 4.19 06/11] kconfig: let 'shell' return enough output for deep path names Sasha Levin
2022-02-20 10:01   ` Pavel Machek
2022-02-15 15:31 ` [PATCH AUTOSEL 4.19 07/11] ata: libata-core: Disable TRIM on M88V29 Sasha Levin
2022-02-15 15:31 ` [PATCH AUTOSEL 4.19 08/11] tracing: Fix tp_printk option related with tp_printk_stop_on_boot Sasha Levin
2022-02-15 15:31 ` [PATCH AUTOSEL 4.19 09/11] NFSD: Fix offset type in I/O trace points Sasha Levin
2022-02-20 10:00   ` Pavel Machek
2022-02-15 15:31 ` [PATCH AUTOSEL 4.19 10/11] net: usb: qmi_wwan: Add support for Dell DW5829e Sasha Levin
2022-02-15 15:31 ` [PATCH AUTOSEL 4.19 11/11] net: macb: Align the dma and coherent dma masks Sasha Levin

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