Adds a platform driver to support pstore on HiKey (copied from the in-kernel ChromeOS driver).

Also adds reservation in the hikey DTS and enables the feature in hikey_defconfig.

Note: Unfortunately the ramoops DT driver never made it upstream, so I'm adding this via a platform driver. Would appreciate thoughts on how to best handle this.

Cc: Rob Herring rob.herring@linaro.org Cc: Arnd Bergmann arnd.bergmann@linaro.org Cc: Haojian Zhuang haojian.zhuang@linaro.org Cc: Guodong Xu guodong.xu@linaro.org Cc: Vishal Bhoj vishal.bhoj@linaro.org Signed-off-by: John Stultz john.stultz@linaro.org --- arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts | 5 +++ arch/arm64/configs/hikey_defconfig | 9 +++++ drivers/platform/Kconfig | 2 ++ drivers/platform/Makefile | 1 + drivers/platform/hikey/Kconfig | 27 +++++++++++++++ drivers/platform/hikey/Makefile | 2 ++ drivers/platform/hikey/hikey_pstore.c | 47 ++++++++++++++++++++++++++ 7 files changed, 93 insertions(+) create mode 100644 drivers/platform/hikey/Kconfig create mode 100644 drivers/platform/hikey/Makefile create mode 100644 drivers/platform/hikey/hikey_pstore.c

diff --git a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts index f0cd5fa..a94f955 100644 --- a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts +++ b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts @@ -61,6 +61,11 @@ no-map; reg = <0x0 0x06dff000 0x0 0x00001000>; /* Mailbox message buf */ }; + + pstore@0x21f00000 { + no-map; + reg = <0x0 0x21f00000 0x0 0x00100000>; /* pstore/ramoops buffer */ + }; };

reboot_reason: reboot-reason@05f01000 { diff --git a/arch/arm64/configs/hikey_defconfig b/arch/arm64/configs/hikey_defconfig index e3cd02d..5313620 100644 --- a/arch/arm64/configs/hikey_defconfig +++ b/arch/arm64/configs/hikey_defconfig @@ -345,6 +345,8 @@ CONFIG_ANDROID_LOW_MEMORY_KILLER=y CONFIG_SYNC=y CONFIG_ION=y CONFIG_ION_HISI=y +CONFIG_HIKEY_PLATFORM=y +CONFIG_HIKEY_PSTORE=y CONFIG_MAILBOX=y CONFIG_HISI_MBOX=y CONFIG_HI6220_MBOX=y @@ -354,6 +356,7 @@ CONFIG_ANDROID=y CONFIG_ANDROID_BINDER_IPC=y CONFIG_REBOOT_REASON_SRAM=y CONFIG_EFI_VARS=y +CONFIG_EFI_VARS_PSTORE_DEFAULT_DISABLE=y CONFIG_EXT4_FS=y CONFIG_EXT4_FS_SECURITY=y CONFIG_BTRFS_FS=y @@ -371,6 +374,10 @@ CONFIG_TMPFS=y CONFIG_HUGETLBFS=y CONFIG_SQUASHFS=y CONFIG_SQUASHFS_XZ=y +CONFIG_PSTORE=y +CONFIG_PSTORE_CONSOLE=y +CONFIG_PSTORE_PMSG=y +CONFIG_PSTORE_RAM=y CONFIG_NFS_FS=y # CONFIG_NFS_V2 is not set CONFIG_NFS_V3_ACL=y @@ -385,6 +392,8 @@ CONFIG_PRINTK_TIME=y CONFIG_DEBUG_INFO=y CONFIG_MAGIC_SYSRQ=y CONFIG_LOCKUP_DETECTOR=y +CONFIG_PANIC_ON_OOPS=y +CONFIG_PANIC_TIMEOUT=10 # CONFIG_SCHED_DEBUG is not set CONFIG_SCHEDSTATS=y CONFIG_TIMER_STATS=y diff --git a/drivers/platform/Kconfig b/drivers/platform/Kconfig index 5bd93a2..881c62b 100644 --- a/drivers/platform/Kconfig +++ b/drivers/platform/Kconfig @@ -7,3 +7,5 @@ endif source "drivers/platform/goldfish/Kconfig"

source "drivers/platform/chrome/Kconfig" + +source "drivers/platform/hikey/Kconfig" diff --git a/drivers/platform/Makefile b/drivers/platform/Makefile index ca26925..b0e7286 100644 --- a/drivers/platform/Makefile +++ b/drivers/platform/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_MIPS) += mips/ obj-$(CONFIG_OLPC) += olpc/ obj-$(CONFIG_GOLDFISH) += goldfish/ obj-$(CONFIG_CHROME_PLATFORMS) += chrome/ +obj-$(CONFIG_HIKEY_PLATFORM) += hikey/ diff --git a/drivers/platform/hikey/Kconfig b/drivers/platform/hikey/Kconfig new file mode 100644 index 0000000..5b36bba --- /dev/null +++ b/drivers/platform/hikey/Kconfig @@ -0,0 +1,27 @@ +# +# Platform support for Chrome OS hardware (Chromebooks and Chromeboxes) +# + +menuconfig HIKEY_PLATFORM + bool "Platform support for HiKey hardware" + depends on ARM64 + ---help--- + Say Y here to get to see options for platform support for + the HiKey board. This option alone does not add any kernel code. + + If you say N, all options in this submenu will be skipped and disabled. + +if HIKEY_PLATFORM + +config HIKEY_PSTORE + tristate "HiKey pstore support" + depends on ARM64 + ---help--- + This module instantiates the persistent storage on Hikey + devices. It can be used to store away console logs and crash + information across reboots. + + If you have a HiKey board, choose Y or M here. + The module will be called hikey_pstore. + +endif # HIKEY_PLATFORM diff --git a/drivers/platform/hikey/Makefile b/drivers/platform/hikey/Makefile new file mode 100644 index 0000000..7ab9173 --- /dev/null +++ b/drivers/platform/hikey/Makefile @@ -0,0 +1,2 @@ + +obj-$(CONFIG_HIKEY_PSTORE) += hikey_pstore.o diff --git a/drivers/platform/hikey/hikey_pstore.c b/drivers/platform/hikey/hikey_pstore.c new file mode 100644 index 0000000..1ab218b --- /dev/null +++ b/drivers/platform/hikey/hikey_pstore.c @@ -0,0 +1,47 @@ +/* + * hikey.c - Driver to instantiate HiKey ramoops device + * (Copied from ChromeOS ramoops implementation) + * + * Copyright (C) 2013 Google, Inc. + * Copyright (C) 2016 Linaro Limited + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, version 2 of the License. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pstore_ram.h> + +static struct ramoops_platform_data hikey_ramoops_data = { + .mem_size = 0x00100000, + .mem_address = 0x21f00000, + .record_size = 0x20000, + .console_size = 0x20000, + .ftrace_size = 0x20000, + .dump_oops = 1, +}; + +static struct platform_device hikey_ramoops = { + .name = "ramoops", + .dev = { + .platform_data = &hikey_ramoops_data, + }, +}; + +static int __init hikey_pstore_init(void) +{ + return platform_device_register(&hikey_ramoops); +} + +static void __exit hikey_pstore_exit(void) +{ + platform_device_unregister(&hikey_ramoops); +} + +module_init(hikey_pstore_init); +module_exit(hikey_pstore_exit); + +MODULE_DESCRIPTION("HiKey pstore module"); +MODULE_LICENSE("GPL");