diff options
Diffstat (limited to 'target/linux/realtek/patches-5.10/302-clocksource-add-otto-driver.patch')
| -rw-r--r-- | target/linux/realtek/patches-5.10/302-clocksource-add-otto-driver.patch | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/target/linux/realtek/patches-5.10/302-clocksource-add-otto-driver.patch b/target/linux/realtek/patches-5.10/302-clocksource-add-otto-driver.patch deleted file mode 100644 index 81dff89f82..0000000000 --- a/target/linux/realtek/patches-5.10/302-clocksource-add-otto-driver.patch +++ /dev/null @@ -1,93 +0,0 @@ -From 3cc8011171186d906c547bc6f0c1f8e350edc7cf Mon Sep 17 00:00:00 2001 -From: Markus Stockhausen <markus.stockhausen@gmx.de> -Date: Mon, 3 Oct 2022 14:45:21 +0200 -Subject: [PATCH] realtek: resurrect timer driver - -Now that we provide a clock driver for the Reltek SOCs the CPU frequency might -change on demand. This has direct visible effects during operation - -- the CEVT 4K timer is no longer a stable clocksource -- after CPU frequencies changes time calculation works wrong -- sched_clock falls back to kernel default interval (100 Hz) -- timestamps in dmesg have only 2 digits left - -[ 0.000000] sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps ... -[ 0.060000] pid_max: default: 32768 minimum: 301 -[ 0.070000] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear) -[ 0.070000] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear) -[ 0.080000] dyndbg: Ignore empty _ddebug table in a CONFIG_DYNAMIC_DEBUG_CORE build -[ 0.090000] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, ... - -Looking around where we can start the CEVT timer for RTL930X is a good basis. -Initially it was developed as a clocksource driver for the broken timer in that -specific SOC series. Afterwards it was shifted around to the CEVT location, -got SMP enablement and lost its clocksource feature. So we at least have -something to copy from. As the timers on these devices are well understood -the implementation follows this way: - -- leave the RTL930X implementation as is -- provide a new driver for RTL83XX devices only -- swap RTL930X driver at a later time - -Like the clock driver this patch contains a self contained module that is SOC -independet and already provides full support for the RTL838X, RTL839X and -RTL930X devices. Some of the new (or reestablished) features are: - -- simplified initialization routines -- SMP setup with CPU hotplug framework -- derived from LXB clock speed -- supplied clocksource -- dedicated register functions for better readability -- documentation about some caveats - -Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de> -[remove unused header includes, remove old CONFIG_MIPS dependency, add -REALTEK_ prefix to driver symbol] -Signed-off-by: Sander Vanheule <sander@svanheule.net> - ---- - drivers/clocksource/Kconfig | 12 +++ - drivers/clocksource/Makefile | 1 + - include/linux/cpuhotplug.h | 1 + - 3 files changed, 14 insertions(+) - ---- a/drivers/clocksource/Kconfig -+++ b/drivers/clocksource/Kconfig -@@ -127,6 +127,17 @@ config RDA_TIMER - help - Enables the support for the RDA Micro timer driver. - -+config REALTEK_OTTO_TIMER -+ bool "Clocksource/timer for the Realtek Otto platform" -+ select COMMON_CLK -+ select TIMER_OF -+ help -+ This driver adds support for the timers found in the Realtek RTL83xx -+ and RTL93xx SoCs series. This includes chips such as RTL8380, RTL8381 -+ and RTL832, as well as chips from the RTL839x series, such as RTL8390 -+ RT8391, RTL8392, RTL8393 and RTL8396 and chips of the RTL930x series -+ such as RTL9301, RTL9302 or RTL9303. -+ - config SUN4I_TIMER - bool "Sun4i timer driver" if COMPILE_TEST - depends on HAS_IOMEM ---- a/drivers/clocksource/Makefile -+++ b/drivers/clocksource/Makefile -@@ -63,6 +63,7 @@ obj-$(CONFIG_MILBEAUT_TIMER) += timer-mi - obj-$(CONFIG_SPRD_TIMER) += timer-sprd.o - obj-$(CONFIG_NPCM7XX_TIMER) += timer-npcm7xx.o - obj-$(CONFIG_RDA_TIMER) += timer-rda.o -+obj-$(CONFIG_REALTEK_OTTO_TIMER) += timer-rtl-otto.o - - obj-$(CONFIG_ARC_TIMERS) += arc_timer.o - obj-$(CONFIG_ARM_ARCH_TIMER) += arm_arch_timer.o ---- a/include/linux/cpuhotplug.h -+++ b/include/linux/cpuhotplug.h -@@ -133,6 +133,7 @@ enum cpuhp_state { - CPUHP_AP_MARCO_TIMER_STARTING, - CPUHP_AP_MIPS_GIC_TIMER_STARTING, - CPUHP_AP_ARC_TIMER_STARTING, -+ CPUHP_AP_REALTEK_TIMER_STARTING, - CPUHP_AP_RISCV_TIMER_STARTING, - CPUHP_AP_CLINT_TIMER_STARTING, - CPUHP_AP_CSKY_TIMER_STARTING, |