diff options
Diffstat (limited to 'target/linux/ipq40xx/patches-5.4/302-arm-compressed-set-ipq40xx-watchdog-to-allow-boot.patch')
| -rw-r--r-- | target/linux/ipq40xx/patches-5.4/302-arm-compressed-set-ipq40xx-watchdog-to-allow-boot.patch | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/target/linux/ipq40xx/patches-5.4/302-arm-compressed-set-ipq40xx-watchdog-to-allow-boot.patch b/target/linux/ipq40xx/patches-5.4/302-arm-compressed-set-ipq40xx-watchdog-to-allow-boot.patch deleted file mode 100644 index 71618a40f2..0000000000 --- a/target/linux/ipq40xx/patches-5.4/302-arm-compressed-set-ipq40xx-watchdog-to-allow-boot.patch +++ /dev/null @@ -1,66 +0,0 @@ -From 11d6a6128a5a07c429941afc202b6e62a19771be Mon Sep 17 00:00:00 2001 -From: John Thomson <git@johnthomson.fastmail.com.au> -Date: Fri, 23 Oct 2020 19:42:36 +1000 -Subject: [PATCH 2/2] arm: compressed: set ipq40xx watchdog to allow boot - -For IPQ40XX systems where the SoC watchdog is activated before linux, -the watchdog timer may be too small for linux to finish uncompress, -boot, and watchdog management start. -If the watchdog is enabled, set the timeout for it to 30 seconds. -The functionality and offsets were copied from: -drivers/watchdog/qcom-wdt.c qcom_wdt_set_timeout & qcom_wdt_start -The watchdog memory address was taken from: -arch/arm/boot/dts/qcom-ipq4019.dtsi - -This was required on Mikrotik IPQ40XX consumer hardware using Mikrotik's -RouterBoot bootloader. - -Signed-off-by: John Thomson <git@johnthomson.fastmail.com.au> ---- - arch/arm/boot/compressed/head.S | 35 +++++++++++++++++++++++++++++++++ - 1 file changed, 35 insertions(+) - ---- a/arch/arm/boot/compressed/head.S -+++ b/arch/arm/boot/compressed/head.S -@@ -599,6 +599,41 @@ not_relocated: mov r0, #0 - bic r4, r4, #1 - blne cache_on - -+/* Set the Qualcom IPQ40xx watchdog timeout to 30 seconds -+ * if it is enabled, so that there is time for kernel -+ * to decompress, boot, and take over the watchdog. -+ * data and functionality from drivers/watchdog/qcom-wdt.c -+ * address from arch/arm/boot/dts/qcom-ipq4019.dtsi -+ */ -+#ifdef CONFIG_ARCH_IPQ40XX -+watchdog_set: -+ /* offsets: -+ * 0x04 reset (=1 resets countdown) -+ * 0x08 enable (=0 disables) -+ * 0x0c status (=1 when SoC was reset by watchdog) -+ * 0x10 bark (=timeout warning in ticks) -+ * 0x14 bite (=timeout reset in ticks) -+ * clock rate is 1<<15 hertz -+ */ -+ .equ watchdog, 0x0b017000 @Store watchdog base address -+ movw r0, #:lower16:watchdog -+ movt r0, #:upper16:watchdog -+ ldr r1, [r0, #0x08] @Get enabled? -+ cmp r1, #1 @If not enabled, do not change -+ bne watchdog_finished -+ mov r1, #0 -+ str r1, [r0, #0x08] @Disable the watchdog -+ mov r1, #1 -+ str r1, [r0, #0x04] @Pet the watchdog -+ mov r1, #30 @30 seconds timeout -+ lsl r1, r1, #15 @converted to ticks -+ str r1, [r0, #0x10] @Set the bark timeout -+ str r1, [r0, #0x14] @Set the bite timeout -+ mov r1, #1 -+ str r1, [r0, #0x08] @Enable the watchdog -+watchdog_finished: -+#endif /* CONFIG_ARCH_IPQ40XX */ -+ - /* - * The C runtime environment should now be setup sufficiently. - * Set up some pointers, and start decompressing. |