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Date: Tue, 20 Aug 2013 12:21:21 +0200
From: boris brezillon <b.brezillon@...rkiz.com>
To: Mike Turquette <mturquette@...aro.org>
CC: Boris BREZILLON <b.brezillon@...rkiz.com>,
Grant Likely <grant.likely@...aro.org>,
Rob Herring <rob.herring@...xeda.com>,
Rob Landley <rob@...dley.net>,
Andrew Victor <linux@...im.org.za>,
Nicolas Ferre <nicolas.ferre@...el.com>,
Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
Russell King <linux@....linux.org.uk>,
Felipe Balbi <balbi@...com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Ludovic Desroches <ludovic.desroches@...el.com>,
Josh Wu <josh.wu@...el.com>, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 00/19] ARM: at91: move to common clk framework
Hello Mike,
Could you take a look at this patch series ?
I'd like to have your opinion on some key points:
- at91 clk dt bindings
- in some clk_prepare (pll clks, main clk) callbacks I make use of
wait_event to wait for an interrupt.
Should I do it this way or instead use the cpu_relax function ?
- some clks define clk_prepare but not clk_enable (enabling work is done
in clk_prepare).
Is it okay to leave this callback empty and rely on the default
behaviour (enable count increment) ?
- at91 clk implemetation in its whole
Best Regards,
Boris
On 08/08/2013 06:53, Boris BREZILLON wrote:
> Hello,
>
> This patch series is the 3rd version of the new at91 clock implementation
> (using common clk framework).
>
> Most of the clock provided by the PMC (Power Management Controller) are
> implemented :
> - main clock (main oscillator)
> - pll clocks
> - master clock
> - programmable clocks
> - utmi clock
> - peripheral clocks
> - system clocks
>
> This implementation is only compatible with device tree definition.
> The goal is to define the whole clock tree in the device tree.
>
> Please feel free to comment the dt bindinds.
>
> This patch series is based on linux-next and has been tested on sama5d31ek
> board using device tree. It compiles for other SoCs and both with and
> but it has not been tested (Richard, I did not add your Tested-by because
> a lot of things have changed since v2).
>
> BTW could other people test it on other boards (I only have a kizbox and
> a sama5d31ek dev kit).
>
> Best Regards,
> Boris
>
> Changes since v2:
> - fix several bugs in clk implementations
> - drop non-dt boards support
> - split the series to ease review and tests:
> * 1 patch series for new clk implementations (this series)
> * 1 patch series to move each at91 SoC to common clk framework (coming soon)
> - modify dt-bindings (add atmel,clk- prefix to atmel specific properties)
> - add clk macros for dt-bindings
> - add pmc framework (helper function to access pmc registers)
> - add interrupt support to enable passive wait in clk_prepare functions
>
> Changes since v1:
> - fix bugs in pll, programmable and system clock implementations
> (wrong bit position).
> - add usb clock configuration support (ohci and udc drivers +
> clk_lookup for non dt boards)
> - rework of the system clock interfaces (no need to define a parent clock,
> system clock is a gate with no rate info)
> - change system, peripheral and programmable clk dt bindings (1 master node
> and multiple child nodes each defining a system/peripheral or prog clock)
> - fix bugs in sama5 dt definition
>
> Boris BREZILLON (19):
> ARM: at91: move at91_pmc.h to include/linux/clk/at91_pmc.h
> ARM: at91: add Kconfig options for common clk support
> clk: at91: add PMC base support
> clk: at91: add PMC macro file for dt definitions
> clk: at91: add PMC main clock
> clk: at91: add PMC pll clocks
> clk: at91: add pll id macros for pll dt bindings
> clk: at91: add PMC master clock
> clk: at91: add PMC system clocks
> ARM: at91/dt: add system clk id definitions in dt-bindings include
> dir
> clk: at91: add PMC peripheral clocks
> clk: at91: add peripheral clk macros for peripheral clk dt bindings
> clk: at91: add PMC programmable clocks
> clk: at91: add PMC utmi clock
> clk: at91: add PMC usb clock
> clk: at91: add PMC smd clock
> clk: at91: add PMC clk device tree binding doc.
> ARM: at91: move pit timer to common clk framework
> ARM: at91: add new compatible strings for pmc driver
>
> .../devicetree/bindings/clock/at91-clock.txt | 312 ++++++++++++
> arch/arm/mach-at91/Kconfig | 44 ++
> arch/arm/mach-at91/Kconfig.non_dt | 6 +
> arch/arm/mach-at91/Makefile | 2 +-
> arch/arm/mach-at91/at91rm9200.c | 2 +-
> arch/arm/mach-at91/at91sam9260.c | 2 +-
> arch/arm/mach-at91/at91sam9261.c | 2 +-
> arch/arm/mach-at91/at91sam9263.c | 2 +-
> arch/arm/mach-at91/at91sam926x_time.c | 14 +-
> arch/arm/mach-at91/at91sam9g45.c | 2 +-
> arch/arm/mach-at91/at91sam9n12.c | 2 +-
> arch/arm/mach-at91/at91sam9rl.c | 2 +-
> arch/arm/mach-at91/at91sam9x5.c | 2 +-
> arch/arm/mach-at91/clock.c | 8 +-
> arch/arm/mach-at91/generic.h | 3 +-
> arch/arm/mach-at91/pm.c | 2 +-
> arch/arm/mach-at91/pm_slowclock.S | 2 +-
> arch/arm/mach-at91/sama5d3.c | 2 +-
> arch/arm/mach-at91/setup.c | 8 +-
> drivers/clk/Makefile | 1 +
> drivers/clk/at91/Makefile | 12 +
> drivers/clk/at91/clk-main.c | 171 +++++++
> drivers/clk/at91/clk-master.c | 386 +++++++++++++++
> drivers/clk/at91/clk-peripheral.c | 401 ++++++++++++++++
> drivers/clk/at91/clk-pll.c | 506 ++++++++++++++++++++
> drivers/clk/at91/clk-plldiv.c | 137 ++++++
> drivers/clk/at91/clk-programmable.c | 419 ++++++++++++++++
> drivers/clk/at91/clk-smd.c | 171 +++++++
> drivers/clk/at91/clk-system.c | 191 ++++++++
> drivers/clk/at91/clk-usb.c | 323 +++++++++++++
> drivers/clk/at91/clk-utmi.c | 161 +++++++
> drivers/clk/at91/pmc.c | 387 +++++++++++++++
> drivers/clk/at91/pmc.h | 111 +++++
> drivers/usb/gadget/atmel_usba_udc.c | 2 +-
> .../dt-bindings/clk/at91/at91rm9200/clk-system.h | 16 +
> .../dt-bindings/clk/at91/at91sam9261/clk-system.h | 15 +
> .../clk/at91/at91sam9x5/clk-peripheral.h | 15 +
> include/dt-bindings/clk/at91/common/clk-pll.h | 13 +
> include/dt-bindings/clk/at91/common/clk-system.h | 21 +
> include/dt-bindings/clk/at91/common/pmc.h | 20 +
> .../include/mach => include/linux/clk}/at91_pmc.h | 4 +-
> 41 files changed, 3882 insertions(+), 20 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/clock/at91-clock.txt
> create mode 100644 drivers/clk/at91/Makefile
> create mode 100644 drivers/clk/at91/clk-main.c
> create mode 100644 drivers/clk/at91/clk-master.c
> create mode 100644 drivers/clk/at91/clk-peripheral.c
> create mode 100644 drivers/clk/at91/clk-pll.c
> create mode 100644 drivers/clk/at91/clk-plldiv.c
> create mode 100644 drivers/clk/at91/clk-programmable.c
> create mode 100644 drivers/clk/at91/clk-smd.c
> create mode 100644 drivers/clk/at91/clk-system.c
> create mode 100644 drivers/clk/at91/clk-usb.c
> create mode 100644 drivers/clk/at91/clk-utmi.c
> create mode 100644 drivers/clk/at91/pmc.c
> create mode 100644 drivers/clk/at91/pmc.h
> create mode 100644 include/dt-bindings/clk/at91/at91rm9200/clk-system.h
> create mode 100644 include/dt-bindings/clk/at91/at91sam9261/clk-system.h
> create mode 100644 include/dt-bindings/clk/at91/at91sam9x5/clk-peripheral.h
> create mode 100644 include/dt-bindings/clk/at91/common/clk-pll.h
> create mode 100644 include/dt-bindings/clk/at91/common/clk-system.h
> create mode 100644 include/dt-bindings/clk/at91/common/pmc.h
> rename {arch/arm/mach-at91/include/mach => include/linux/clk}/at91_pmc.h (98%)
>
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