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mop500_snowball_ethernet_clock_enable() provided a means to enable a
clock which was used for the SMSC911x Ethernet device on Snowball. It
was merely a stand-in until the driver was common clk compliant. Now
that it is, this can be removed for both DT and ATAGs booting.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
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When this node was added, the AB8500 GPIO driver was pretty broken.
As a hack, we pretended that NOMADIK GPIO 26 was the correct on/off
pin, as it was unused. It worked because AB8500 GPIO 26 was in an
'always on from boot' state. Now the AB8500 GPIO driver is working,
the default state for all the pins is 'off'. Let's flip back over to
use the correct GPIO which is _actually_ attached to the regulator.
We're also taking the opportunity to straighten out some formatting
misdemeanours, swapping spaces for tabs.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
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Here we're adding a node for the AB8500 GPIO device. This will allow
other DT:ed components to obtain GPIOs for use within their drivers.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into next/soc
From Heiko Stuebner:
Adds basic support for Rockchip Cortex-A9 SoCs.
* tag 'v3.11-rockchip-basics' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
arm: add basic support for Rockchip RK3066a boards
arm: add debug uarts for rockchip rk29xx and rk3xxx series
arm: Add basic clocks for Rockchip rk3066a SoCs
clocksource: dw_apb_timer_of: use clocksource_of_init
clocksource: dw_apb_timer_of: select DW_APB_TIMER
clocksource: dw_apb_timer_of: add clock-handling
clocksource: dw_apb_timer_of: enable the use the clocksource as sched clock
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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This adds a generic devicetree board file and a dtsi for boards
based on the RK3066a SoCs from Rockchip.
Apart from the generic parts (gic, clocks, pinctrl) the only components
currently supported are the timers, uarts and mmc ports (all DesignWare-
based).
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Olof Johansson <olof@lixom.net>
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Uarts on all recent Rockchip SoCs are Synopsis DesignWare 8250 types.
Only their addresses vary very much.
This patch adds the necessary definitions to use any of the uart ports
for early debug purposes.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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This adds a basic clock setup for rk3066a SoCs. Only the gates are
set up currently, as the mux and dividers should use the upcoming
generic devicetree bindings.
Clocks whose rates need to be known are supplied by fixed-rate
"dummy"-clocks that provide the correct rate. This is uncritical insofar
that the only bootloader currently in existence for Rockchip devices
is the propietary Rockchip one that always setups the clocks in the
necessary way.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Mike Turquette <mturquette@linaro.org>
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Add CONFIG_BLK_DEV_INITRD to the defconfig to support
initramfs and initrd.
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
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Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
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This patch rewrite driver code to be ready to add support for
MC13892 LEDs and probe from devicetree.
(cooloney@gmail.com: fix one coding style issue when apply this patch)
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Tested-by: Philippe Retornaz <philippe.retornaz@epfl.ch>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
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CodingStyle does not allow C99 style comments. Since the
dts files live in the kernel for now, make this compliant.
Signed-off-by: Matt Porter <matt.porter@linaro.org>
Acked-by: Christian Daudt <csd@broadcom.com>
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Add SDHCI bindings for the Broadcom 281xx SoCs.
Changes from V2:
- Documentation cleanups
Changes from V1:
- split original patch into 2, one for driver and this one for dt
Signed-off-by: Christian Daudt <csd@broadcom.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/bcousson/linux-omap-dt into next/dt
From Benoit Cousson:
omap devicetree changes for v3.11 merge window
- Add mandatory DT support for missing IPs, like USB host,
bandgap, LED, NAND, LAN, CPSW, PWM for OMAP and AMXX devices.
- Introduce new AM43x silicon.
* 'for_3.11/dts' of git://git.kernel.org/pub/scm/linux/kernel/git/bcousson/linux-omap-dt: (52 commits)
ARM: dts: omap5-uevm: Provide USB Host PHY clock frequency
ARM: dts: omap4-panda: Fix DVI EDID reads
ARM: dts: omap4-panda: Add USB Host support
ARM: dts: AM43x EPOS EVM support
ARM: dts: OMAP5: Add bandgap DT entry
ARM: dts: AM33XX: Add pinmux configuration for CPSW to am335x EVM
ARM: dts: AM33XX: Add pinmux configuration for CPSW to EVMsk
ARM: dts: AM33XX: Add pinmux configuration for CPSW to beaglebone
ARM: dts: omap3-overo: Add default trigger for TWL4030 LED
ARM: dts: omap3-tobi: Correct polarity for GPIO LED
ARM: dts: omap3-tobi: Add SMSC911X node
ARM: dts: OMAP3: Include IRQ header
ARM: dts: Protect pinctrl headers against multiple inclusions
ARM: AM33XX: clock data: Enable clkout2 as part of init
ARM: AM33XX: clock: Add debugSS clock nodes
ARM: dts: OMAP5: Add Palmas MFD node and regulator nodes
ARM: dts: AM33XX: Add PWM backlight DT data to am335x-evmsk
ARM: dts: AM33XX: Add PWM backlight DT data to am335x-evm
ARM: dts: AM33XX: Add PWMSS device tree nodes
ARM: dts: OMAP4460: Add bandgap entry for OMAP4460 devices
...
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Tony Lindgren <tony@atomide.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/soc
From Kukjin Kim:
update exynos_defconfig
- enable GPIO buttons and RTC drivers
* tag 'samsung-defconfig-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: exynos_defconfig: Enable GPIO buttons and RTC drivers
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/soc
From Kukjin Kim:
cleanup and removing dead code for only support DT for exynos
- remove board file for exynos
- remove legacy files which are not used anymore
- decouple ARCH_EXYNOS from PLAT_S5P
* tag 'remove-nondt-exynos-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: (35 commits)
ARM: EXYNOS: Remove remaining dead code after non-DT support removal
ARM: EXYNOS: Remove legacy L2X0 initialization
ARM: EXYNOS: Use exynos_init_io() as map_io callback
ARM: EXYNOS: Remove custom init_irq callbacks
ARM: EXYNOS: Remove mach/regs-usb-phy.h header
thermal: exynos: Support both EXYNOS4X12 SoCs
ARM: EXYNOS: Remove unused base addresses from mach/map.h header
ARM: EXYNOS: Remove mach/irqs.h header
ARM: EXYNOS: Select SPARSE_IRQ for Exynos
ARM: SAMSUNG: Make legacy MFC support code depend on SAMSUNG_ATAGS
ARM: EXYNOS: Remove mach/regs-gpio.h header
ARM: EXYNOS: Remove mach/gpio.h
ARM: EXYNOS: Remove setup-i2c0.c
ARM: EXYNOS: Do not select legacy Kconfig symbols any more
ARM: SAMSUNG: Include most of mach/ headers conditionally
ARM: EXYNOS: Decouple ARCH_EXYNOS from PLAT_S5P
USB: Check for ARCH_EXYNOS separately
platform: Check for ARCH_EXYNOS separately
ARM: SAMSUNG: Compile legacy IRQ and GPIO PM code only with ATAGS support
ARM: EXYNOS: Provide compatibility stubs for PM code in pm-core.h header
...
Conflicts:
arch/arm/mach-exynos/Kconfig
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/drivers
From Kukjin Kim:
based on exynos-dt-2 and s3c24xx-dt-2
- use #include for all Samsung DT
- add clk for exynos audio subsystem (audss) and i2s
- support audss and i2s for exynos5250
* tag 'common-clk-audio' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
clk: exynos5250: Add enum entries for divider clock of i2s1 and i2s2
ARM: dts: Update Samsung I2S documentation
ARM: dts: add clock provider information for i2s controllers in Exynos5250
ARM: dts: add Exynos audio subsystem clock controller node
clk: samsung: register audio subsystem clocks using common clock framework
ARM: dts: use #include for all device trees for Samsung
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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This is the merge base for samsung/common-clk-audio
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/dt
From Kukjin Kim:
based on tags/s3c24xx-dt-1
- update uart addresses in s3c2416-dt auxdata due to removing S3C2410_PA_UARTX
* tag 's3c24xx-dt-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: S3C24XX: update uart addresses in s3c2416-dt auxdata
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/dt
From Kukjin Kim:
2nd exynos dt update based on tags/exynos-dt-1
- enable RTC on exynos5250 snow and Arndale boards
- add support LCD and PWM for exynos4210 Origen board
- update bootargs to support 8GiB for exynos5440 SSDK5440 and SD5v1 boards
- enable spi and add opp level for exynos5440
- add example doc for samsung-pinctrl dt bindings
* tag 'exynos-dt-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: dts: Set BUCK7 as always on for Origen board
ARM: dts: Add FIMD node to Origen4210 board
ARM: dts: Add LCD related pinctrl entries for exynos4210
ARM: dts: Add PWM related pinctrl entries for exynos4210
Documentation: Add examples to samsung-pinctrl device tree bindings documentation
ARM: dts: Enable RTC node for exynos5250-snow
ARM: dts: Enable RTC node for Arndale
ARM: dts: Removing pdma for exynos5440
ARM: dts: update bootargs to support 8GiB for SSDK5440 and SD5v1
ARM: dts: Add more opp levels in exynos5440
ARM: dts: Add wm8994 regulator support on smdk5250
ARM: dts: enable spi for EXYNOS5440 SOC
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/soc
From Kukjin Kim:
arch/arm/mach-exynos update
- enable XHCI on exynos5
- enable Pinctrl on exynos4 and exynos5
- calling scu_enable() is only available on Cortex-A9
* tag 'exynos-arch-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: EXYNOS: call scu_enable() only in case of cortex-A9 processor
ARM: EXYNOS: Select PINCTRL_EXYNOS for exynos4/5 at chip level
ARM: EXYNOS: Enable XHCI support on exynos5
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/drivers
From Tony Lindgren:
Move OMAP Mailbox framework to drivers via Suman Anna <s-anna@ti.com>
The OMAP Mailbox driver framework is moved out of arch/arm folder
into drivers/mailbox folder, to re-enable building it and also serve
as a baseline for adapting to the new mailbox driver framework. The
changes mainly contain:
- a minor bug fix and cleanup of mach-specific mailbox code
- remove any header dependencies from plat-omap for multi-platform
support
- represent mailbox device data through platform data/hwmod attrs
- move the omap mailbox code out of plat-omap/mach-omapX to
drivers/mailbox folder
* tag 'omap-for-v3.11/mailbox-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
mailbox/omap: move the OMAP mailbox framework to drivers
ARM: OMAP2+: add user and fifo info to mailbox platform data
ARM: OMAP2+: mbox: remove dependencies with soc.h
omap: mailbox: correct the argument type for irq ops
omap: mailbox: call request_irq after mbox queues are allocated
omap: mailbox: check iomem resource before dereferencing it
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/drivers
From Tony Lindgren:
GPMC suspend patch that was left out of the earlier
omap-for-v3.11/gpmc-signed branch because of a compile error
it caused. The compile error is fixed in this version.
* tag 'omap-for-v3.11/gpmc-part2-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: gpmc: Low power transition support
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/boards
From Tony Lindgren:
Minor board changes for v3.11 merge window. These are
tapering down finally as we're getting closer to making
omap2+ DT only.
* tag 'omap-for-v3.11/board-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: omap2plus_defconfig: enable USB_PHY and NOP_USB_XCEIV
ARM: OMAP1: nokia770: enable Tahvo
ARM: OMAP3EVM: Marking omap3_evm_display_init() with CONFIG_BROKEN
arm: omap: board-overo: reset GPIO for SMSC911x
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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A recent cleanup caused build errors in some configurations
because the header defining NR_IRQS_LEGACY is not included
here. Since that value is the default, we can just as well
leave it out.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Jamie Iles <jamie@jamieiles.com>
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Conflicts:
arch/arm/mach-omap2/Makefile
arch/arm/mach-omap2/io.c
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Commit 5336539 "ARM: S5P64X0: Use common uncompress.h part
for plat-samsung" was missing a type cast, this brings
it in line with the other samsung platforms.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/cleanup
From Kukjin Kim:
- Consolidate uncompress subroutines and s5p64x0-uncompress
- Cleanup watchdog support on Samsung to support multiplatform
* tag 'samsung-cleanup-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: SAMSUNG: Remove unused plat/regs-watchdog.h header
ARM: SAMSUNG: Remove legacy watchdog reset code
ARM: SAMSUNG: Let platforms use the new watchdog reset driver
ARM: SAMSUNG: Add watchdog reset driver
ARM: SAMSUNG: Use local definitions of watchdog registers
watchdog: s3c2410_wdt: Use local register definitions
ARM: S5P64X0: Use common uncompress.h part for plat-samsung
ARM: SAMSUNG: Consolidate uncompress subroutine
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/cleanup
From Tony Lindgren:
Non-critical omap DMA fixes and removal of unused legacy code.
* tag 'omap-for-v3.11/dma-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP1: Remove dma.h
ARM: OMAP1: Remove legacy irda.h and irda setup from board files
ARM: OMAP1: Remove duplicated DMA channel definitions
ARM: OMAP1: Remove McBSP DMA channel definitions
ARM: OMAP2+: Remove dma.h
ARM: OMAP2+: hwmod: Remove remaining DMA channel definitions
ARM: OMAP2+: Remove duplicated DMA channel definitions
ARM: OMAP2+: Remove AES crypto device DMA channel definitions
ARM: OMAP: dma: Remove the erroneous freeing of platform data
ARM: OMAP: dma: Fix the dma_chan_link_map init order
ARM: OMAP: dma: Remove the wrong dev_id check
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/cleanup
From Tony Lindgren:
PM voltage domain clean-up via Kevin Hilman <khilman@linaro.org>:
OMAP: PM: remove requirement for voltage domain data; remove dummy data
* tag 'omap-for-v3.11/pm-voltdomain-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: AM33xx: Remove the unused voltagedomain data
ARM: OMAP2+: Powerdomain: Remove the need to always have a voltdm associated to a pwrdm
Includes an update to Linux 3.10-rc6.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/cleanup
From Tony Lindgren:
Serial driver platform init code clean-up via Kevin Hilman <khilman@linaro.org>:
OMAP: PM: the serial core + driver can no handle no_console_suspend support
without any SoC specific handlding or SoC-specific DT bindings. Remove
the now unused SoC specifics for OMAP.
* tag 'omap-for-v3.11/pm-serial-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
arm: omap2+: omap_device: remove no_idle_on_suspend
arm: dts: am33xx: Remove "ti,no_idle_on_suspend" property.
arm: omap2+: serial: remove no_console_suspend support
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/soc
From Tony Lindgren:
Fix am43x minimal booting as I accidentally left out one
patch from the already merged omap-for-v3.11/soc-signed branch.
Also fixes for ti81x booting and revision check updates.
These are based on omap-for-v3.11/soc-signed because of the
am43x dependency to earlier patches.
* tag 'omap-for-v3.11/soc-part2-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP3+: am33xx id: Add new am33xx specific function to check dev_feature
ARM: OMAP: TI816X: add powerdomains for TI816x
ARM: OMAP2: TI81XX: id: Add cpu id for TI816x ES2.0 and ES2.1
ARM: OMAP2+: AM43x: basic dt support
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik into next/dt
From Linus Walleij:
Nomadik DT and clock work:
- Lee Jones' pinctrl compat ontology patches
- A real clock driver for the Nomadik, 100% DT-based
- Device tree changes for the Nomadik clocks
* tag 'nomadik-dt-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik:
ARM: nomadik: add the new clocks to the device tree
clk: nomadik: implement the Nomadik clocks properly
pinctrl/nomadik: Standardise Pinctrl compat string for Nomadik based platforms
ARM: nomadik: Standardise Nomadik STN8815 based Pinctrl compat string in the DTS
Conflicts:
arch/arm/boot/dts/ste-nomadik-s8815.dts
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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next/soc
From Maxime Ripard:
Allwinner platform additions, take 2
Adds machine support for the Allwinner A10s SoC
* tag 'sunxi-core-for-3.11-2' of git://github.com/mripard/linux:
ARM: sunxi: Add Allwinner A10s machine compatible
Depends on the sunxi/cleanup branch
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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into next/cleanup
From Jamie Iles:
* 'picoxcell-next' of git://github.com/jamieiles/linux-2.6-ji:
ARM: picoxcell: Remove init_irq declaration in machine description
picoxcell: remove redundant common.h
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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next/soc
From Maxime Ripard:
Allwinner defconfig changes for 3.11
* tag 'sunxi-defconfig-for-3.11' of git://github.com/mripard/linux:
ARM: multi_v7: Enable Allwinner EMAC in multi_v7_defconfig
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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From Maxime Ripard:
Allwinner SoCs DT additions for 3.11, part 2
Mostly adds support for the i2c controllers and the Allwinner A10S SoC.
* tag 'sunxi-dt-for-3.11-2' of git://github.com/mripard/linux:
ARM: sunxi: Add Olimex A10s-Olinuxino-micro device tree
ARM: sunxi: dt: Add Allwinner A10s DTSI
ARM: sun4i: cubieboard: Enable the i2c controllers
ARM: sun5i: olinuxino: Enable the i2c controllers
ARM: sun5i: dt: Add i2c muxing options
ARM: sun4i: dt: Add i2c muxing options
ARM: sunxi: dt: Add i2c controller nodes to the DTSI
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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next/fixes-non-critical
From Nicolas Ferre:
Two non critical fixes that can go in 3.11.
* tag 'at91-fixes' of git://github.com/at91linux/linux-at91:
ARM: at91: Change the internal SRAM memory type MT_MEMORY_NONCACHED
ARM: at91: Fix link breakage when !CONFIG_PHYLIB
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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next/cleanup
From Nicolas Ferre:
One old board removal.
* tag 'at91-cleanup' of git://github.com/at91linux/linux-at91:
ARM: at91: drop rm9200dk board support
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci into next/soc
From Sekhar Nori:
DaVinci SoC changes for v3.11
This pull request moves DaVinci EDMA library to
arch/arm/common so it can be used by OMAP based AM335x.
This is a temporary step until all drivers are converted
to use the dmaengine driver in drivers/dma/edma.c.
Several drivers like SPI, MMC/SD have already been converted.
Some like audio are pending.
The other two patches in the pull request are cleanup in nature.
* tag 'davinci-for-v3.11/soc-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci:
ARM: edma: remove unused transfer controller handlers
ARM: davinci: move private EDMA API to arm/common
ARM: davinci: remove __init atrribute from function declaration
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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As noticed by Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org>, commit
865e0527d2d7 ('arm: mvebu: avoid hardcoded virtual address in
coherency code') added a postcore_initcall() to register the bus
notifier that the mvebu code needs to apply correct DMA operations on
its platform devices breaks the multiplatform boot on other platforms,
because the bus notifier registration is unconditional.
This commit fixes that by registering the bus notifier only if we have
the mvebu coherency unit described in the Device Tree. The conditional
used is exactly the same in which the bus_register_notifier() call was
originally enclosed before 865e0527d2d7 ('arm: mvebu: avoid hardcoded
virtual address in coherency code').
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reported-by: Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
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Current implementation of cpu_{suspend}/cpu_{resume} relies on the MPIDR
to index the array of pointers where the context is saved and restored.
The current approach works as long as the MPIDR can be considered a
linear index, so that the pointers array can simply be dereferenced by
using the MPIDR[7:0] value.
On ARM multi-cluster systems, where the MPIDR may not be a linear index,
to properly dereference the stack pointer array, a mapping function should
be applied to it so that it can be used for arrays look-ups.
This patch adds code in the cpu_{suspend}/cpu_{resume} implementation
that relies on shifting and ORing hashing method to map a MPIDR value to a
set of buckets precomputed at boot to have a collision free mapping from
MPIDR to context pointers.
The hashing algorithm must be simple, fast, and implementable with few
instructions since in the cpu_resume path the mapping is carried out with
the MMU off and the I-cache off, hence code and data are fetched from DRAM
with no-caching available. Simplicity is counterbalanced with a little
increase of memory (allocated dynamically) for stack pointers buckets, that
should be anyway fairly limited on most systems.
Memory for context pointers is allocated in a early_initcall with
size precomputed and stashed previously in kernel data structures.
Memory for context pointers is allocated through kmalloc; this
guarantees contiguous physical addresses for the allocated memory which
is fundamental to the correct functioning of the resume mechanism that
relies on the context pointer array to be a chunk of contiguous physical
memory. Virtual to physical address conversion for the context pointer
array base is carried out at boot to avoid fiddling with virt_to_phys
conversions in the cpu_resume path which is quite fragile and should be
optimized to execute as few instructions as possible.
Virtual and physical context pointer base array addresses are stashed in a
struct that is accessible from assembly using values generated through the
asm-offsets.c mechanism.
Cc: Will Deacon <will.deacon@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Colin Cross <ccross@android.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Kevin Hilman <khilman@linaro.org>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
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On ARM SMP systems, cores are identified by their MPIDR register.
The MPIDR guidelines in the ARM ARM do not provide strict enforcement of
MPIDR layout, only recommendations that, if followed, split the MPIDR
on ARM 32 bit platforms in three affinity levels. In multi-cluster
systems like big.LITTLE, if the affinity guidelines are followed, the
MPIDR can not be considered an index anymore. This means that the
association between logical CPU in the kernel and the HW CPU identifier
becomes somewhat more complicated requiring methods like hashing to
associate a given MPIDR to a CPU logical index, in order for the look-up
to be carried out in an efficient and scalable way.
This patch provides a function in the kernel that starting from the
cpu_logical_map, implement collision-free hashing of MPIDR values by checking
all significative bits of MPIDR affinity level bitfields. The hashing
can then be carried out through bits shifting and ORing; the resulting
hash algorithm is a collision-free though not minimal hash that can be
executed with few assembly instructions. The mpidr is filtered through a
mpidr mask that is built by checking all bits that toggle in the set of
MPIDRs corresponding to possible CPUs. Bits that do not toggle do not carry
information so they do not contribute to the resulting hash.
Pseudo code:
/* check all bits that toggle, so they are required */
for (i = 1, mpidr_mask = 0; i < num_possible_cpus(); i++)
mpidr_mask |= (cpu_logical_map(i) ^ cpu_logical_map(0));
/*
* Build shifts to be applied to aff0, aff1, aff2 values to hash the mpidr
* fls() returns the last bit set in a word, 0 if none
* ffs() returns the first bit set in a word, 0 if none
*/
fs0 = mpidr_mask[7:0] ? ffs(mpidr_mask[7:0]) - 1 : 0;
fs1 = mpidr_mask[15:8] ? ffs(mpidr_mask[15:8]) - 1 : 0;
fs2 = mpidr_mask[23:16] ? ffs(mpidr_mask[23:16]) - 1 : 0;
ls0 = fls(mpidr_mask[7:0]);
ls1 = fls(mpidr_mask[15:8]);
ls2 = fls(mpidr_mask[23:16]);
bits0 = ls0 - fs0;
bits1 = ls1 - fs1;
bits2 = ls2 - fs2;
aff0_shift = fs0;
aff1_shift = 8 + fs1 - bits0;
aff2_shift = 16 + fs2 - (bits0 + bits1);
u32 hash(u32 mpidr) {
u32 l0, l1, l2;
u32 mpidr_masked = mpidr & mpidr_mask;
l0 = mpidr_masked & 0xff;
l1 = mpidr_masked & 0xff00;
l2 = mpidr_masked & 0xff0000;
return (l0 >> aff0_shift | l1 >> aff1_shift | l2 >> aff2_shift);
}
The hashing algorithm relies on the inherent properties set in the ARM ARM
recommendations for the MPIDR. Exotic configurations, where for instance the
MPIDR values at a given affinity level have large holes, can end up requiring
big hash tables since the compression of values that can be achieved through
shifting is somewhat crippled when holes are present. Kernel warns if
the number of buckets of the resulting hash table exceeds the number of
possible CPUs by a factor of 4, which is a symptom of a very sparse HW
MPIDR configuration.
The hash algorithm is quite simple and can easily be implemented in assembly
code, to be used in code paths where the kernel virtual address space is
not set-up (ie cpu_resume) and instruction and data fetches are strongly
ordered so code must be compact and must carry out few data accesses.
Cc: Will Deacon <will.deacon@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Colin Cross <ccross@android.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Kevin Hilman <khilman@linaro.org>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
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This avoids impossible platform combinations, as we cannot
build a combined V5 + V6/V7 kernel.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
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Replace /include/ by #include for da850 device tree files, in order to
use the C pre-processor, making use of #define features possible.
Signed-off-by: Philip Avinash <avinashphilip@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
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* linus: (1465 commits)
ARM: tegra30: clocks: Fix pciex clock registration
lseek(fd, n, SEEK_END) does *not* go to eof - n
Linux 3.10-rc6
smp.h: Use local_irq_{save,restore}() in !SMP version of on_each_cpu().
powerpc: Fix missing/delayed calls to irq_work
powerpc: Fix emulation of illegal instructions on PowerNV platform
powerpc: Fix stack overflow crash in resume_kernel when ftracing
snd_pcm_link(): fix a leak...
use can_lookup() instead of direct checks of ->i_op->lookup
move exit_task_namespaces() outside of exit_notify()
fput: task_work_add() can fail if the caller has passed exit_task_work()
xfs: don't shutdown log recovery on validation errors
xfs: ensure btree root split sets blkno correctly
xfs: fix implicit padding in directory and attr CRC formats
xfs: don't emit v5 superblock warnings on write
mei: me: clear interrupts on the resume path
mei: nfc: fix nfc device freeing
mei: init: Flush scheduled work before resetting the device
sctp: fully initialize sctp_outq in sctp_outq_init
netiucv: Hold rtnl between name allocation and device registration.
...
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This revamps the device tree to fit with the new clock
implementation and brings it quite a bit closer to how
the hardware actually works.
After this the clock implementation knows about all
clock gates and will gate off all unused clocks at
boot time and save a bit of power.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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into next/soc
From Shawn Guo:
imx soc changes for 3.11:
* New SoCs i.MX6 Sololite and Vybrid VF610 support
* imx5 and imx6 clock fixes and additions
* Update clock driver to use of_clk_init() function
* Refactor restart routine mxc_restart() to get it work for DT boot
as well
* Clean up mxc specific ulpi access ops
* imx defconfig updates
* tag 'imx-soc-3.11' of git://git.linaro.org/people/shawnguo/linux-2.6: (29 commits)
ARM: imx_v6_v7_defconfig: Enable Vybrid VF610
ARM: imx_v6_v7_defconfig: Enable imx-wm8962 by default
ARM: clk-imx6qdl: Add clko1 configuration for imx6qdl-sabresd
ARM: imx_v6_v7_defconfig: Enable PWM and backlight options
ARM: imx: Remove mxc specific ulpi access ops
ARM: imx: add initial support for VF610
ARM: imx: add VF610 clock support
ARM: imx_v6_v7_defconfig: enable parallel display
ARM: imx: clk: No need to initialize phandle struct
ARM: imx: irq-common: Include header to avoid sparse warning
ARM: imx: Enable mx6 solo-lite support
ARM: imx6: use common of_clk_init() call to initialize clocks
ARM: imx6q: call of_clk_init() to register fixed rate clocks
ARM: imx: imx_v6_v7_defconfig: Select CONFIG_DRM_IMX_TVE
ARM: i.MX6: clk: add different DualLite MLB clock config
ARM i.MX5: Add S/PDIF clocks
ARM i.MX53: Add SATA clock
ARM: imx6q: clk: add the eim_slow clock
ARM: imx: remove MLB PLL from pllv3
ARM: imx: disable pll8_mlb in mx6q_clks
...
Conflicts:
arch/arm/Kconfig.debug (simple add/add conflict)
Includes an update to 3.10-rc6
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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into next/dt
From Shawn Guo:
imx device tree changes for 3.11:
* A bunch of new board additions, imx6sl-evk, vf610-twr, imx53-tx53,
imx53-m53evk and imx27-phytec-phycore
* Various pinctrl setting updates and additions
* Enable various on board peripherals, usb, audio, nor, display etc.
* Configure L2 cache data and tag latency from device tree
* Add imx-weim bus driver
* tag 'imx-dt-3.11' of git://git.linaro.org/people/shawnguo/linux-2.6: (82 commits)
ARM: dts: imx27: Add VPU devicetree node
ARM: mxc: fix gpio-ranges for VF610
ARM: dtsi: imx6qdl-sabresd: Enable WM8962 audio support
ARM: dtsi: imx6qdl-sabresd: Enable SSI2 and AUDMUX
ARM: dtsi: imx6qdl-sabresd: Add WM8962 CODEC support
ARM: dtsi: imx6qdl-sabresd: add a fixed regulator for WM8962
ARM: dtsi: imx6dl: Add a pinctrl for AUDMUX
ARM: dtsi: imx6q/imx6dl: Add a pinctrl for I2C1
ARM: dts: imx6qdl-sabresd: add clko1 iomux configuration
ARM: dts: Phytec imx6q pfla02 and pbab01 support
ARM: dts: imx6q: Add pinctrl for usdhc2 and enet
ARM: dts: imx27-phytec-phycore-rdk: Add MTD name for NOR flash
ARM: dts: imx27-phytec-phycore-rdk: Add SDHC support
ARM: dts: i.MX27: Add SDHC devicetree nodes
ARM: dts: i.MX27: Add DMA devicetree node
ARM: dts: imx6qdl-sabreauto: enable the WEIM NOR
ARM: dts: imx6dl: add pinctrls for WEIM NOR
ARM: dts: imx6q: add pinctrls for WEIM NOR
ARM: dts: imx6qdl: add more information for WEIM
ARM: dts: imx6q{dl}: fix the pin conflict between SPI and WEIM
...
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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into next/dt
This is a dependency for imx/dt
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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into next/dt
From Shawn Guo:
mxs device tree changes for 3.11:
* A couple of new board support, cfa10055 and cfa10057
* A few updates on cfa10036 device tree source
* Some auart pinctrl data addition
* Adopt soc bus infrastructure for mach-mxs
* tag 'mxs-dt-3.11' of git://git.linaro.org/people/shawnguo/linux-2.6:
ARM: mxs: dt: Add Crystalfontz CFA-10057 device tree
ARM: mxs: dt: Add the Crystalfontz CFA-10055 device tree
ARM: cfa10049: Switch the chip select pin of the LCD controller
ARM: cfa10036: Add USB0 OTG port
ARM: dts: apf28dev: Add touchscreen support for APF28dev
ARM: mxs: Fix UARTs on M28EVK
ARM: cfa10036: dt: Change i2c0 clock frequency
ARM: dts: cfa10036: Change the OLED display to SSD1306
ARM: mx28: add auart4 2 pins pinmux to imx28.dtsi
ARM: mx28: add auart3 2 pins pinmux to imx28.dtsi
ARM: mx28: add auart2 2 pins pinmux to imx28.dtsi
ARM: mxs: Use soc bus infrastructure
ARM: dts: mx28: Adjust the digctl compatible string
ARM: mxs: Remove init_irq declaration in machine description
Includes an update to 3.10-rc6
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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