Hi, This patch series contains fixes and cleanups around the issue that the console UART should not idled on suspend while using "no_console_suspend" in bootargs.
The approach thought of is to modify the serial core/serial driver to bypass runtime PM if the UART in contention is a console and we are using "no_console_suspend" in our bootargs. While fixing the above issue, there are other cleanups also done as part of this series which are no longer required. This cleanups mainly include getting rid of using "omap_device_disable_idle_on_suspend" api for both dt and non dt case as the serial driver will be self sufficient to handle the "no_idle_on_suspend" issue. Serial was the only one making use of "omap_device_disable_idle_on_suspend" Test info (except drivers: serial: mpc52xx_uart: Remove "uart_console" defintion): Omap4430sdp: - Tested wakeup from UART after suspend for dt and non dt case. Omap5430evm: - Tested wakeup from UART after suspend for dt case. There were discussions about how to handle "no_idle_on_suspend" issue and all the discussions are as follows: [v3]: https://lkml.org/lkml/2013/4/5/239 [v2]: https://lkml.org/lkml/2013/4/2/350 [v1]: https://lkml.org/lkml/2013/3/18/199 https://lkml.org/lkml/2013/3/18/295 Due to the amount of change in approach and other cleanups coming around it, I am posting this as a new series. This patches are based on 3.9-rc3 custom tree which has Santosh Shilimkar serial patch[1] [1]: http://permalink.gmane.org/gmane.linux.ports.arm.omap/95828 Cc: Santosh Shilimkar <santosh.shilim...@ti.com> Cc: Felipe Balbi <ba...@ti.com> Cc: Rajendra nayak <rna...@ti.com> Sourav Poddar (6): drivers: tty: serial: Move "uart_console" def to core header file. drivers: serial: mpc52xx_uart: Remove "uart_console" defintion driver: serial: omap: add prepare/complete callback for "no_console_suspend" case arm: mach-omap2: remove "OMAP_DEVICE_NO_IDLE_ON_SUSPEND" check arm: dts: am33xx: Remove "ti,no_idle_on_suspend" property. arm: mach-omap2: Remove "no_console_suspend" arch/arm/boot/dts/am33xx.dtsi | 1 - arch/arm/mach-omap2/omap_device.c | 10 +--------- arch/arm/mach-omap2/serial.c | 7 ------- drivers/tty/serial/mpc52xx_uart.c | 10 ---------- drivers/tty/serial/omap-serial.c | 20 ++++++++++++++++++++ drivers/tty/serial/serial_core.c | 6 ------ include/linux/serial_core.h | 6 ++++++ 7 files changed, 27 insertions(+), 33 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
