linux-kernel - Re: [PATCH] RISC-V: defconfig: enable MMC & SPI for RISC-V

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Message-ID: <alpine.DEB.2.21.9999.1906260858130.21507@viisi.sifive.com>
Date:   Wed, 26 Jun 2019 09:00:08 -0700 (PDT)
From:   Paul Walmsley <paul.walmsley@...ive.com>
To:     Atish Patra <atish.patra@....com>
cc:     linux-kernel@...r.kernel.org, Albert Ou <aou@...s.berkeley.edu>,
        Anup Patel <anup@...infault.org>,
        Palmer Dabbelt <palmer@...ive.com>,
        Alistair Francis <Alistair.Francis@....com>,
        Olof Johansson <olof@...om.net>,
        linux-riscv@...ts.infradead.org,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] RISC-V: defconfig: enable MMC & SPI for RISC-V

On Tue, 25 Jun 2019, Atish Patra wrote:

> Currently, riscv upstream defconfig doesn't let you boot
> through userspace if rootfs is on the SD card.
> 
> Let's enable MMC & SPI drivers as well so that one can boot
> to the user space using default config in upstream kernel.
> 
> Signed-off-by: Atish Patra <atish.patra@....com>

Thanks.  The patch also enables CONFIG_DEVTMPFS_MOUNT, but doesn't mention 
it, so the following is what I've queued for v5.2-rc.  Let me know if you 
object to it.


- Paul


From: Atish Patra <atish.patra@....com>
Date: Tue, 25 Jun 2019 15:56:36 -0700
Subject: [PATCH] RISC-V: defconfig: enable MMC & SPI for RISC-V

Currently, riscv upstream defconfig doesn't let you boot
through userspace if rootfs is on the SD card.

Let's enable MMC & SPI drivers as well so that one can boot
to the user space using default config in upstream kernel.

While here, enable automatic mounting of devtmpfs to simplify
kernel testing with minimal root filesystems. (pjw)

Signed-off-by: Atish Patra <atish.patra@....com>
Reviewed-by: Palmer Dabbelt <palmer@...ive.com>
[paul.walmsley@...ive.com: mention the DEVTMPFS_MOUNT change in the
 patch description]
Signed-off-by: Paul Walmsley <paul.walmsley@...ive.com>
---
 arch/riscv/configs/defconfig | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/riscv/configs/defconfig b/arch/riscv/configs/defconfig
index 4f02967e55de..04944fb4fa7a 100644
--- a/arch/riscv/configs/defconfig
+++ b/arch/riscv/configs/defconfig
@@ -69,6 +69,7 @@ CONFIG_VIRTIO_MMIO=y
 CONFIG_CLK_SIFIVE=y
 CONFIG_CLK_SIFIVE_FU540_PRCI=y
 CONFIG_SIFIVE_PLIC=y
+CONFIG_SPI_SIFIVE=y
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_AUTOFS4_FS=y
@@ -84,4 +85,8 @@ CONFIG_ROOT_NFS=y
 CONFIG_CRYPTO_USER_API_HASH=y
 CONFIG_CRYPTO_DEV_VIRTIO=y
 CONFIG_PRINTK_TIME=y
+CONFIG_SPI=y
+CONFIG_MMC_SPI=y
+CONFIG_MMC=y
+CONFIG_DEVTMPFS_MOUNT=y
 # CONFIG_RCU_TRACE is not set
-- 
2.20.1