• Tony Lindgren's avatar
    ARM: dts: omap4-droid4: Fix occasional lost wakeirq for uart1 · 738b150e
    Tony Lindgren authored
    Looks like using the UART CTS pin does not always trigger for a wake-up
    when the SoC is idle.
    
    This is probably because the modem first uses gpio_149 to signal the SoC
    that data will be sent, and the CTS will only get used later when the
    data transfer is starting.
    
    Let's fix the issue by configuring the gpio_149 pad as the wakeirq for
    UART. We have gpio_149 managed by the USB PHY for powering up the right
    USB mode, and after that, the gpio gets recycled as the modem wake-up
    pin. If needeed, the USB PHY can also later on be configured to use
    gpio_149 pad as the wakeirq as a shared irq.
    
    Let's also configure the missing properties for uart-has-rtscts and
    current-speed for the modem port while at it. We already configure the
    hardware flow control pins with uart1_pins pinctrl setting.
    
    Cc: maemo-leste@lists.dyne.org
    Cc: Merlijn Wajer <merlijn@wizzup.org>
    Cc: Pavel Machek <pavel@ucw.cz>
    Cc: Sebastian Reichel <sre@kernel.org>
    Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
    738b150e
motorola-mapphone-common.dtsi 20.5 KB