On the gta04 with a dm3730 omap_hdq does not work properly when the device enters lower power states. Idling uart1 and 2 is enough to show up that problem, if there are no other things enabled. Further research reveals that hdq iclk must not be turned off during transfers, also according to the TRM. That fact is also correctly described in the flags but the code to handle that is incomplete. To handle multiple users of a single ick, autoidle is disabled when a user of that ick requires that (has the OCPIF_SWSUP_IDLE)) Changes since v1: - uses spinlocks instead of mutexes - invert counter logic - check whether clock type is basic Andreas Kemnade (3): clk: ti: add a usecount for autoidle clk: ti: check clock type before doing autoidle ops arm: omap_hwmod disable ick autoidling when a hwmod requires that arch/arm/mach-omap2/omap_hwmod.c | 16 ++++++++++---- drivers/clk/ti/autoidle.c | 48 +++++++++++++++++++++++++++++++--------- include/linux/clk/ti.h | 1 + 3 files changed, 51 insertions(+), 14 deletions(-) -- 2.11.0
