netdev - [PATCH net-next 0/2] net: ipa: fix HOLB timer register use

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Message-Id: <20200703212335.465355-1-elder@linaro.org>
Date:   Fri,  3 Jul 2020 16:23:33 -0500
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     evgreen@...omium.org, subashab@...eaurora.org,
        cpratapa@...eaurora.org, bjorn.andersson@...aro.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 0/2] net: ipa: fix HOLB timer register use

The function ipa_reg_init_hol_block_timer_val() generates the value
to write into the HOL_BLOCK_TIMER endpoint configuration register,
to represent a given timeout value (in microseconds).  It only
supports a timer value of 0 though, in part because that's
sufficient, but mainly because there was some confusion about
how the register is formatted in newer hardware.

I got clarification about the register format, so this series fixes 
ipa_reg_init_hol_block_timer_val() to work for any supported delay
value.

The delay is based on the IPA core clock, so determining the value
to write for a given period requires access to the current core
clock rate.  So the first patch just creates a new function to
provide that.

					-Alex

Alex Elder (2):
  net: ipa: introduce ipa_clock_rate()
  net: ipa: fix HOLB timer calculation

 drivers/net/ipa/ipa_clock.c    |  6 +++
 drivers/net/ipa/ipa_clock.h    |  8 ++++
 drivers/net/ipa/ipa_endpoint.c | 78 +++++++++++++++++++---------------
 3 files changed, 57 insertions(+), 35 deletions(-)

-- 
2.25.1