mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-23 02:54:32 +08:00
09d8b2bdbc
Enable/Clear module level UART wakeup in UART_OMAP_WER register based on return value of device_may_wakeup() in .suspend(). This allows userspace to use sysfs to control the ability of UART to wakeup the system from deep sleep state. Register is restored back in .startup() call that happens as part of resume sequence. With this patch, userspace can control UART wakeup capability via sysfs: To enable wakeup capability: echo enabled > /sys/class/tty/ttyXX/device/power/wakeup For disabling wakeup capability: echo disabled > /sys/class/tty/ttyXX/device/power/wakeup Note that the UART wakeup events configured in the 8250 hardware only work for idle modes that do not cut off power for the UART. For deeper idle states, dedicated padconf wakeirqs must be used. Or in some cases the UART RX pin can be remuxed to GPIO input if the GPIO block stays powered. Signed-off-by: Vignesh R <vigneshr@ti.com> Tested-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
||
|---|---|---|
| .. | ||
| 8250_accent.c | ||
| 8250_acorn.c | ||
| 8250_aspeed_vuart.c | ||
| 8250_bcm2835aux.c | ||
| 8250_boca.c | ||
| 8250_core.c | ||
| 8250_dma.c | ||
| 8250_dw.c | ||
| 8250_early.c | ||
| 8250_em.c | ||
| 8250_exar_st16c554.c | ||
| 8250_exar.c | ||
| 8250_fintek.c | ||
| 8250_fourport.c | ||
| 8250_fsl.c | ||
| 8250_gsc.c | ||
| 8250_hp300.c | ||
| 8250_hub6.c | ||
| 8250_ingenic.c | ||
| 8250_lpc18xx.c | ||
| 8250_lpss.c | ||
| 8250_men_mcb.c | ||
| 8250_mid.c | ||
| 8250_moxa.c | ||
| 8250_mtk.c | ||
| 8250_of.c | ||
| 8250_omap.c | ||
| 8250_pci.c | ||
| 8250_pnp.c | ||
| 8250_port.c | ||
| 8250_pxa.c | ||
| 8250_uniphier.c | ||
| 8250.h | ||
| Kconfig | ||
| Makefile | ||
| serial_cs.c | ||