Changes in V3: - wait_for_bit code is moved to header and converted to static inline function. Previous version added ~7byte of rodata to all boards (even not using wait_for_bit).
Changes in V2: - wait_bit.o is always compiled in - Removed CONFIG_LIB_WAIT_BIT from configs/Kconfigs - Constified arguments to wait_bit - Removed check for CONFIG_... in drivers - Added tested-by to ohci-lp32xx @Sylvain Lemieux: I didn't changed driver logic with v2, so allowed myself to add your tested-by directly.
Tested on: - USB driver on Dragonboard (not yet in mainline) - Infinite sleep (if timeout/interruption works) Build tested on single board for each driver/commit: - hikey - zynq_microzed - platinum
(Old) notes from V1:
This series add generic function to poll register waiting for one or more bits to change.
Very similar function was used in several drivers: - dwc2 - ohci-lp32xx - ehci-mx6 - zynq_gem
First patch adds function, following patches update drivers and board config files / defconfigs.
This series was compile-tested with buildman for ~50 boards (most or even all boards affected by change)
Code was also run-tested on ehci-msm driver (not yet in mainline)
There is single difference in behavior: ohci-lp32xx driver will not print "Timeout..." message with debug disabled. I think it's not a big issue as this driver seems unused, but if it's an issue - please drop that patch.
Mateusz Kulikowski (5): lib: Add wait_for_bit usb: dwc2: Use shared wait_for_bit usb: ohci-lpc32xx: Use shared wait_for_bit usb: ehci-mx6: Use shared wait_for_bit net: zynq_gem: Use shared wait_for_bit
drivers/net/zynq_gem.c | 35 ++------------------ drivers/usb/host/dwc2.c | 41 ++++++++---------------- drivers/usb/host/ehci-mx6.c | 32 +++---------------- drivers/usb/host/ohci-lpc32xx.c | 34 ++++---------------- include/wait_bit.h | 71 +++++++++++++++++++++++++++++++++++++++++ 5 files changed, 97 insertions(+), 116 deletions(-) create mode 100644 include/wait_bit.h