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

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Date:	Sun,  6 Dec 2015 17:22:45 +0100
From:	Remi Pommarel <repk@...plefau.lt>
To:	Stephen Warren <swarren@...dotorg.org>,
	Eric Anholt <eric@...olt.net>, Lee Jones <lee@...nel.org>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Rob Herring <robh+dt@...nel.org>
Cc:	linux-rpi-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
	linux-kernel@...r.kernel.org, Remi Pommarel <repk@...plefau.lt>
Subject: [PATCH v3 0/4] Add PWM clock support for bcm2835

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(-)

-- 
2.0.1

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