Messages in this thread | | | From | Alexandre Belloni <> | Subject | [PATCH v3 00/13] ARM: at91: PMC driver rework | Date | Fri, 4 Dec 2015 18:03:35 +0100 |
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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.
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(-)
-- 2.5.0
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