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| author | Arnd Bergmann <arnd@arndb.de> | 2022-09-15 23:04:41 +0300 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2022-09-15 23:04:41 +0300 |
| commit | 34fdb46f0fe2aac3ef2096a1df15ef4a66608c5c (patch) | |
| tree | 0fbd2a3c85e207d37b9b7dc1e110c1e48cf7082a /drivers/soc | |
| parent | d6ce6d14316e15f7831dfa447b4690093e949aac (diff) | |
| parent | 7bb49d774f481fdd7bd053e034e4d206770fda04 (diff) | |
| download | linux-34fdb46f0fe2aac3ef2096a1df15ef4a66608c5c.tar.xz | |
Merge tag 'arm-soc/for-6.1/drivers' of https://github.com/Broadcom/stblinux into arm/drivers
This pull request contains Broadcom ARM/ARM64 SoC drivers updates for
6.1, please pull the following:
- Guilherme adds a comment to the panic notifier, part of his big panic
notifier rework series
- William migrates all of ARCH_BCM4908 dependencies to ARCH_BCMBCA
* tag 'arm-soc/for-6.1/drivers' of https://github.com/Broadcom/stblinux:
arm64: bcmbca: Make BCM4908 drivers depend on ARCH_BCMBCA
soc: bcm: brcmstb: Document panic notifier action and remove useless header
Link: https://lore.kernel.org/r/20220915023044.2350782-4-f.fainelli@gmail.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/bcm/bcm63xx/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/soc/bcm/brcmstb/pm/pm-arm.c | 16 |
2 files changed, 16 insertions, 4 deletions
diff --git a/drivers/soc/bcm/bcm63xx/Kconfig b/drivers/soc/bcm/bcm63xx/Kconfig index 9e501c8ac5ce..355c34482076 100644 --- a/drivers/soc/bcm/bcm63xx/Kconfig +++ b/drivers/soc/bcm/bcm63xx/Kconfig @@ -13,8 +13,8 @@ endif # SOC_BCM63XX config BCM_PMB bool "Broadcom PMB (Power Management Bus) driver" - depends on ARCH_BCM4908 || (COMPILE_TEST && OF) - default ARCH_BCM4908 + depends on ARCH_BCMBCA || (COMPILE_TEST && OF) + default ARCH_BCMBCA select PM_GENERIC_DOMAINS if PM help This enables support for the Broadcom's PMB (Power Management Bus) that diff --git a/drivers/soc/bcm/brcmstb/pm/pm-arm.c b/drivers/soc/bcm/brcmstb/pm/pm-arm.c index d6b30d521307..7643c9ade888 100644 --- a/drivers/soc/bcm/brcmstb/pm/pm-arm.c +++ b/drivers/soc/bcm/brcmstb/pm/pm-arm.c @@ -25,7 +25,6 @@ #include <linux/kernel.h> #include <linux/memblock.h> #include <linux/module.h> -#include <linux/notifier.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/panic_notifier.h> @@ -664,7 +663,20 @@ static void __iomem *brcmstb_ioremap_match(const struct of_device_id *matches, return of_io_request_and_map(dn, index, dn->full_name); } - +/* + * The AON is a small domain in the SoC that can retain its state across + * various system wide sleep states and specific reset conditions; the + * AON DATA RAM is a small RAM of a few words (< 1KB) which can store + * persistent information across such events. + * + * The purpose of the below panic notifier is to help with notifying + * the bootloader that a panic occurred and so that it should try its + * best to preserve the DRAM contents holding that buffer for recovery + * by the kernel as opposed to wiping out DRAM clean again. + * + * Reference: comment from Florian Fainelli, at + * https://lore.kernel.org/lkml/781cafb0-8d06-8b56-907a-5175c2da196a@gmail.com + */ static int brcmstb_pm_panic_notify(struct notifier_block *nb, unsigned long action, void *data) { |