• Tony Lindgren's avatar
    ARM: OMAP2+: Configure voltage controller for cpcap to low-speed · c145649b
    Tony Lindgren authored
    Looks like the i2c timings in high-speed mode do not work properly to
    allow us to clear I2C_DISABLE bits for PRM_VOLTCTRL register and the
    device reboots if I2C_DISABLE bits are cleared.
    
    Let's configure the voltage controller i2c for low-speed mode as done in
    the Motorola Mapphone Android Linux kernel. This saves us about 7mW of
    power during retention compared to the high-speed values.
    
    Let's also change the low-speed warning to pr_info about relying on the
    bootloader configured low-speed values like we currently do.
    
    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>
    c145649b
pmic-cpcap.c 6.97 KB