Re: [PATCH V6 5/7] tty: serial: qcom_geni_serial: Add interconnect support

From: Greg KH <gregkh@linuxfoundation.org>
To: Akash Asthana <akashast@codeaurora.org>
Cc: agross@kernel.org, bjorn.andersson@linaro.org, wsa@the-dreams.de,
	broonie@kernel.org, mark.rutland@arm.com, robh+dt@kernel.org,
	linux-i2c@vger.kernel.org, linux-spi@vger.kernel.org,
	devicetree@vger.kernel.org, swboyd@chromium.org,
	mgautam@codeaurora.org, linux-arm-msm@vger.kernel.org,
	linux-serial@vger.kernel.org, mka@chromium.org,
	dianders@chromium.org, msavaliy@codeaurora.org,
	evgreen@chromium.org
Subject: Re: [PATCH V6 5/7] tty: serial: qcom_geni_serial: Add interconnect support
Date: Thu, 21 May 2020 10:39:58 +0200	[thread overview]
Message-ID: <20200521083958.GA2689021@kroah.com> (raw)
In-Reply-To: <1590049764-20912-6-git-send-email-akashast@codeaurora.org>

On Thu, May 21, 2020 at 01:59:22PM +0530, Akash Asthana wrote:
> Get the interconnect paths for Uart based Serial Engine device
> and vote according to the baud rate requirement of the driver.
> 
> Signed-off-by: Akash Asthana <akashast@codeaurora.org>
> Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
> ---
> Changes in V2:
>  - As per Bjorn's comment, removed se == NULL check from geni_serial_icc_get
>  - As per Bjorn's comment, removed code to set se->icc_path* to NULL in failure
>  - As per Bjorn's comment, introduced and using devm_of_icc_get API for getting
>    path handle
>  - As per Matthias comment, added error handling for icc_set_bw call
> 
> Changes in V3:
>  - As per Matthias comment, use common library APIs defined in geni-se
>    driver for ICC functionality.
> 
> Changes in V4:
>  - As per Mark's comment move peak_bw guess as twice of avg_bw if
>    nothing mentioned explicitly to ICC core.
>  - As per Matthias's comment select core clock BW based on baud rate.
>    If it's less than 115200 go for GENI_DEFAULT_BW else CORE_2X_50_MHZ
> 
> Changes in V5:
>  - Add icc_enable/disable to power on/off call.
>  - Save some non-zero avg/peak value to ICC core by calling geni_icc_set_bw
>    from probe so that when resume/icc_enable is called NOC are running at
>    some non-zero value. No need to call icc_disable after BW vote because
>    console devices are expected to be in active state from the probe itself
>    and qcom_geni_serial_pm(STATE_OFF) will be called for non-console ones.
> 
> Changes in V6:
>  - No change
> 
>  drivers/tty/serial/qcom_geni_serial.c | 31 ++++++++++++++++++++++++++++---
>  1 file changed, 28 insertions(+), 3 deletions(-)

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>