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SubjectRe: [PATCH v3 00/13] ARM: at91: PMC driver rework
On Fri,  4 Dec 2015 18:03:35 +0100
Alexandre Belloni <alexandre.belloni@free-electrons.com> wrote:

> Hi,
>
> This patch set is a cleanup that properly separate drivers needing to access the
> PMC (PM and USB) from the clock driver by exposing the PMC as a syscon.
>
> This also allows to implement a fix for preempt-rt. Currently, at91 platform are
> crashing when using preempt-rt because the irq handler are transformed in
> threaded irq handler but at the time the pmc registers its clocks, it is not
> possible to creat threads, leading to a NULL pointer dereference in the kernel.
>
> The new infrastructure uses polling until it is late enough to register threaded
> irqs.
>
> Note that there is an ugly global spinlock for the peripheral and generated
> clocks. More infrastructure is needed in syscon to get rid of that one. We will
> be working on that.

To the whole series,

Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>

>
> Changes in v3:
> - rebased on v4.4-rc1 and so included the sama5d2 and the generated clocks
> - fixed comments from Wenyou
>
> Alexandre Belloni (10):
> clk: at91: clk-main: factorize irq handling
> clk: at91: make IRQ optional and register them later
> clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe
> clk: at91: pmc: move pmc structures to C file
> ARM: at91: pm: simply call at91_pm_init
> ARM: at91: pm: find and remap the pmc
> ARM: at91: pm: move idle functions to pm.c
> ARM: at91: remove useless includes and function prototypes
> usb: gadget: atmel: access the PMC using regmap
> clk: at91: pmc: drop at91_pmc_base
>
> Boris Brezillon (3):
> clk: at91: make use of syscon to share PMC registers in several
> drivers
> clk: at91: make use of syscon/regmap internally
> clk: at91: only disable available IRQs
>
> arch/arm/mach-at91/Kconfig | 1 +
> arch/arm/mach-at91/at91rm9200.c | 2 -
> arch/arm/mach-at91/at91sam9.c | 2 -
> arch/arm/mach-at91/generic.h | 13 +-
> arch/arm/mach-at91/pm.c | 70 +++++-
> arch/arm/mach-at91/sama5.c | 2 +-
> drivers/clk/at91/clk-generated.c | 95 ++++---
> drivers/clk/at91/clk-h32mx.c | 32 ++-
> drivers/clk/at91/clk-main.c | 430 ++++++++++++++++++--------------
> drivers/clk/at91/clk-master.c | 134 ++++++----
> drivers/clk/at91/clk-peripheral.c | 135 +++++-----
> drivers/clk/at91/clk-pll.c | 190 +++++++++-----
> drivers/clk/at91/clk-plldiv.c | 42 ++--
> drivers/clk/at91/clk-programmable.c | 92 ++++---
> drivers/clk/at91/clk-slow.c | 27 +-
> drivers/clk/at91/clk-smd.c | 54 ++--
> drivers/clk/at91/clk-system.c | 129 +++++++---
> drivers/clk/at91/clk-usb.c | 121 +++++----
> drivers/clk/at91/clk-utmi.c | 116 ++++++---
> drivers/clk/at91/pmc.c | 314 +++++------------------
> drivers/clk/at91/pmc.h | 96 +------
> drivers/usb/gadget/udc/atmel_usba_udc.c | 20 +-
> drivers/usb/gadget/udc/atmel_usba_udc.h | 2 +
> include/linux/clk/at91_pmc.h | 12 -
> 24 files changed, 1111 insertions(+), 1020 deletions(-)
>



--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com


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