linux-kernel - Re: [PATCH v3 0/4] Add PWM clock support for bcm2835

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Date:	Wed, 23 Dec 2015 19:57:04 +0100
From:	Remi Pommarel <repk@...plefau.lt>
To:	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Eric Anholt <eric@...olt.net>,
	Stephen Warren <swarren@...dotorg.org>,
	Lee Jones <lee@...nel.org>, Rob Herring <robh+dt@...nel.org>
Cc:	linux-rpi-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/4] Add PWM clock support for bcm2835

On Sun, Dec 06, 2015 at 05:22:45PM +0100, Remi Pommarel wrote:
> Hi,
> 
> This patchset adds support for pwm clock. At boot, this clock does not have a
> default parent nor a default rate set. Thus we should be able to change its
> parent to get this clock working. The current clock implementation is using a
> mux to select the parent, but these clocks need to add a password (0x5a) in
> higher register bits when changing parent. So a generic mux cannot be used
> here.
> 
> The two first patches fix the clock parent selection, while the last ones are
> actually adding the pwm clock registration.
> 
> Changes since v1:
> 	- determine_rate now based its parent selection upon divided rate
> 	  instead of the parent one
> 	- bcm2835_clock_choose_div has been modified to produce an avarage rate
> 	  lower or equal to the requested one
> 	- devicetree modifications have removed to be send in another patch
> 
> Changes since v2:
> 	- Remove useless variable and include
> 	- Make bcm2835_clock_choose_div() divisor round up ability optional
> 	- Set rate in bcm2835_determine_rate()
> 	- Add device tree modification in a separate patch
> 
> 
> Remi Pommarel (4):
>   clk: bcm2835: add a round up ability to the clock divisor
>   clk: bcm2835: Support for clock parent selection
>   clk: bcm2835: Add PWM clock support
>   clk: bcm2835: Add PWM clock support to the device tree
> 
>  arch/arm/boot/dts/bcm2835-rpi.dtsi  |   4 +
>  arch/arm/boot/dts/bcm2835.dtsi      |   9 +++
>  drivers/clk/bcm/clk-bcm2835.c       | 155 +++++++++++++++++++++++-------------
>  include/dt-bindings/clock/bcm2835.h |   3 +-
>  4 files changed, 116 insertions(+), 55 deletions(-)
> 

Gently ping.

Patches 0 to 3 are reviewed by Eric, and can eventually be pushed on clk
tree.

Patch 4 has been sent on devicetree mailinglist for review
(http://www.spinics.net/lists/devicetree/msg108070.html), waiting for
previous patches to be pushed.

Thanks

-- 
Remi
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