MIPS: BCM47xx: Move NVRAM driver to the drivers/firmware/

After Broadcom switched from MIPS to ARM for their home routers we need
to have NVRAM driver in some common place (not arch/mips/). As explained
in Kconfig, this driver is responsible for parsing SoC configuration
data that is passed to the kernel in flash from the bootloader firmware
called "CFE".

We were thinking about putting it in bus directory, however there are
two possible buses for MIPS: drivers/ssb/ and drivers/bcma/. So this
won't fit there and this is why I would like to move this driver to the
drivers/firmware/.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Cc: linux-mips@linux-mips.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Seiji Aguchi <seiji.aguchi@hds.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Mike Waychison <mikew@google.com>
Cc: Roy Franz <roy.franz@linaro.org>
Cc: Matt Fleming <matt.fleming@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Patchwork: https://patchwork.linux-mips.org/patch/10544/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Rafał Miłecki 2015-06-10 23:05:08 +02:00 committed by Ralf Baechle
parent 1e51714c81
commit f6e734a8c1
9 changed files with 25 additions and 2 deletions

View File

@ -2265,6 +2265,12 @@ S: Supported
F: drivers/gpio/gpio-bcm-kona.c
F: Documentation/devicetree/bindings/gpio/gpio-bcm-kona.txt
BROADCOM NVRAM DRIVER
M: Rafał Miłecki <zajec5@gmail.com>
L: linux-mips@linux-mips.org
S: Maintained
F: drivers/firmware/broadcom/*
BROADCOM SPECIFIC AMBA DRIVER (BCMA)
M: Rafał Miłecki <zajec5@gmail.com>
L: linux-wireless@vger.kernel.org

View File

@ -190,6 +190,7 @@ config BCM47XX
select USE_GENERIC_EARLY_PRINTK_8250
select GPIOLIB
select LEDS_GPIO_REGISTER
select BCM47XX_NVRAM
help
Support for BCM47XX based boards

View File

@ -3,5 +3,5 @@
# under Linux.
#
obj-y += irq.o nvram.o prom.o serial.o setup.o time.o sprom.o
obj-y += irq.o prom.o serial.o setup.o time.o sprom.o
obj-y += board.o buttons.o leds.o workarounds.o

View File

@ -136,6 +136,7 @@ config QCOM_SCM
bool
depends on ARM || ARM64
source "drivers/firmware/broadcom/Kconfig"
source "drivers/firmware/google/Kconfig"
source "drivers/firmware/efi/Kconfig"

View File

@ -14,6 +14,7 @@ obj-$(CONFIG_FIRMWARE_MEMMAP) += memmap.o
obj-$(CONFIG_QCOM_SCM) += qcom_scm.o
CFLAGS_qcom_scm.o :=$(call as-instr,.arch_extension sec,-DREQUIRES_SEC=1)
obj-y += broadcom/
obj-$(CONFIG_GOOGLE_FIRMWARE) += google/
obj-$(CONFIG_EFI) += efi/
obj-$(CONFIG_UEFI_CPER) += efi/

View File

@ -0,0 +1,11 @@
config BCM47XX_NVRAM
bool "Broadcom NVRAM driver"
depends on BCM47XX || ARCH_BCM_5301X
help
Broadcom home routers contain flash partition called "nvram" with all
important hardware configuration as well as some minor user setup.
NVRAM partition contains a text-like data representing name=value
pairs.
This driver provides an easy way to get value of requested parameter.
It simply reads content of NVRAM and parses it. It doesn't control any
hardware part itself.

View File

@ -0,0 +1 @@
obj-$(CONFIG_BCM47XX_NVRAM) += bcm47xx_nvram.o

View File

@ -244,3 +244,5 @@ char *bcm47xx_nvram_get_contents(size_t *nvram_size)
return nvram;
}
EXPORT_SYMBOL(bcm47xx_nvram_get_contents);
MODULE_LICENSE("GPLv2");

View File

@ -12,7 +12,7 @@
#include <linux/kernel.h>
#include <linux/vmalloc.h>
#ifdef CONFIG_BCM47XX
#ifdef CONFIG_BCM47XX_NVRAM
int bcm47xx_nvram_init_from_mem(u32 base, u32 lim);
int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len);
int bcm47xx_nvram_gpio_pin(const char *name);