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* [PATCH v3 0/3] mach-omap2: handle autoidle denial
@ 2019-01-16 22:04 Andreas Kemnade
  2019-01-16 22:04 ` [PATCH v3 1/3] clk: ti: add a usecount for autoidle Andreas Kemnade
                   ` (3 more replies)
  0 siblings, 4 replies; 22+ messages in thread
From: Andreas Kemnade @ 2019-01-16 22:04 UTC (permalink / raw)
  To: t-kristo, mturquette, sboyd, linux-omap, linux-clk, linux-kernel,
	bcousson, paul, tony, letux-kernel
  Cc: Andreas Kemnade

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 v3:
- replace CLK_IS_BASIC

Changes v2:
- uses spinlocks instead of mutexes
- invert counter logic
- check whether clock type is basic

Depends on: clk: ti: get rid of CLK_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        | 52 +++++++++++++++++++++++++++++++++-------
 include/linux/clk/ti.h           |  1 +
 3 files changed, 57 insertions(+), 12 deletions(-)

-- 
2.11.0


^ permalink raw reply	[flat|nested] 22+ messages in thread

end of thread, other threads:[~2019-02-15 19:19 UTC | newest]

Thread overview: 22+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-01-16 22:04 [PATCH v3 0/3] mach-omap2: handle autoidle denial Andreas Kemnade
2019-01-16 22:04 ` [PATCH v3 1/3] clk: ti: add a usecount for autoidle Andreas Kemnade
2019-01-16 22:04 ` [PATCH v3 2/3] clk: ti: check clock type before doing autoidle ops Andreas Kemnade
2019-01-16 22:04 ` [PATCH v3 3/3] arm: omap_hwmod disable ick autoidling when a hwmod requires that Andreas Kemnade
2019-01-18 15:48   ` Tony Lindgren
2019-01-18 17:18     ` Andreas Kemnade
2019-01-18 18:36       ` Tony Lindgren
2019-01-18 19:38         ` Andreas Kemnade
2019-01-18 19:42           ` [Letux-kernel] " Andreas Kemnade
2019-01-18 19:48             ` Tony Lindgren
2019-01-19  6:39               ` J, KEERTHY
2019-01-19  7:12                 ` Andreas Kemnade
2019-01-19  7:58                   ` J, KEERTHY
2019-01-22  6:26                     ` Keerthy
2019-01-18 19:45           ` Tony Lindgren
2019-01-21  7:12             ` Tero Kristo
2019-01-21 17:07               ` Tony Lindgren
2019-01-21 17:53                 ` Andreas Kemnade
2019-01-21 19:56                   ` Tony Lindgren
2019-01-21 19:58 ` [PATCH v3 0/3] mach-omap2: handle autoidle denial Tony Lindgren
2019-02-09 18:53   ` Andreas Kemnade
2019-02-15 19:19     ` Tero Kristo

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