diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0016-watchdog-bcm2835-Support-setting-reboot-partition.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0016-watchdog-bcm2835-Support-setting-reboot-partition.patch | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0016-watchdog-bcm2835-Support-setting-reboot-partition.patch b/target/linux/bcm27xx/patches-4.19/950-0016-watchdog-bcm2835-Support-setting-reboot-partition.patch deleted file mode 100644 index ce3bf61911..0000000000 --- a/target/linux/bcm27xx/patches-4.19/950-0016-watchdog-bcm2835-Support-setting-reboot-partition.patch +++ /dev/null @@ -1,102 +0,0 @@ -From 8018869c6c8590018c1cd272475eda0dbf72a7ec Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org> -Date: Fri, 7 Oct 2016 16:50:59 +0200 -Subject: [PATCH] watchdog: bcm2835: Support setting reboot partition -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -The Raspberry Pi firmware looks at the RSTS register to know which -partition to boot from. The reboot syscall command -LINUX_REBOOT_CMD_RESTART2 supports passing in a string argument. - -Add support for passing in a partition number 0..63 to boot from. -Partition 63 is a special partiton indicating halt. -If the partition doesn't exist, the firmware falls back to partition 0. - -Signed-off-by: Noralf Trønnes <noralf@tronnes.org> ---- - drivers/watchdog/bcm2835_wdt.c | 49 +++++++++++++++++++--------------- - 1 file changed, 27 insertions(+), 22 deletions(-) - ---- a/drivers/watchdog/bcm2835_wdt.c -+++ b/drivers/watchdog/bcm2835_wdt.c -@@ -31,13 +31,7 @@ - #define PM_RSTC_WRCFG_SET 0x00000030 - #define PM_RSTC_WRCFG_FULL_RESET 0x00000020 - #define PM_RSTC_RESET 0x00000102 -- --/* -- * The Raspberry Pi firmware uses the RSTS register to know which partition -- * to boot from. The partition value is spread into bits 0, 2, 4, 6, 8, 10. -- * Partition 63 is a special partition used by the firmware to indicate halt. -- */ --#define PM_RSTS_RASPBERRYPI_HALT 0x555 -+#define PM_RSTS_PARTITION_CLR 0xfffffaaa - - #define SECS_TO_WDOG_TICKS(x) ((x) << 16) - #define WDOG_TICKS_TO_SECS(x) ((x) >> 16) -@@ -94,9 +88,24 @@ static unsigned int bcm2835_wdt_get_time - return WDOG_TICKS_TO_SECS(ret & PM_WDOG_TIME_SET); - } - --static void __bcm2835_restart(struct bcm2835_wdt *wdt) -+/* -+ * The Raspberry Pi firmware uses the RSTS register to know which partiton -+ * to boot from. The partiton value is spread into bits 0, 2, 4, 6, 8, 10. -+ * Partiton 63 is a special partition used by the firmware to indicate halt. -+ */ -+ -+static void __bcm2835_restart(struct bcm2835_wdt *wdt, u8 partition) - { -- u32 val; -+ u32 val, rsts; -+ -+ rsts = (partition & BIT(0)) | ((partition & BIT(1)) << 1) | -+ ((partition & BIT(2)) << 2) | ((partition & BIT(3)) << 3) | -+ ((partition & BIT(4)) << 4) | ((partition & BIT(5)) << 5); -+ -+ val = readl_relaxed(wdt->base + PM_RSTS); -+ val &= PM_RSTS_PARTITION_CLR; -+ val |= PM_PASSWORD | rsts; -+ writel_relaxed(val, wdt->base + PM_RSTS); - - /* use a timeout of 10 ticks (~150us) */ - writel_relaxed(10 | PM_PASSWORD, wdt->base + PM_WDOG); -@@ -114,7 +123,13 @@ static int bcm2835_restart(struct watchd - { - struct bcm2835_wdt *wdt = watchdog_get_drvdata(wdog); - -- __bcm2835_restart(wdt); -+ unsigned long long val; -+ u8 partition = 0; -+ -+ if (data && !kstrtoull(data, 0, &val) && val <= 63) -+ partition = val; -+ -+ __bcm2835_restart(wdt, partition); - - return 0; - } -@@ -152,19 +167,9 @@ static void bcm2835_power_off(void) - of_find_compatible_node(NULL, NULL, "brcm,bcm2835-pm-wdt"); - struct platform_device *pdev = of_find_device_by_node(np); - struct bcm2835_wdt *wdt = platform_get_drvdata(pdev); -- u32 val; -- -- /* -- * We set the watchdog hard reset bit here to distinguish this reset -- * from the normal (full) reset. bootcode.bin will not reboot after a -- * hard reset. -- */ -- val = readl_relaxed(wdt->base + PM_RSTS); -- val |= PM_PASSWORD | PM_RSTS_RASPBERRYPI_HALT; -- writel_relaxed(val, wdt->base + PM_RSTS); - -- /* Continue with normal reset mechanism */ -- __bcm2835_restart(wdt); -+ /* Partition 63 tells the firmware that this is a halt */ -+ __bcm2835_restart(wdt, 63); - } - - static int bcm2835_wdt_probe(struct platform_device *pdev) |