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path: root/drivers/clk/versatile
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2013-10-08clk: fixup argument order when setting VCO parametersJonathan Austin
The order of arguments in the call to vco_set() for the ICST clocks appears to have been switched in error, which results in the VCO not being initialised correctly. This in turn stops the integrated LCD on things like Integrator/CP from working correctly. This patch fixes the order and restores the expected functionality. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Austin <jonathan.austin@arm.com> Signed-off-by: Mike Turquette <mturquette@linaro.org> Cc: stable@vger.kernel.org
2013-08-19clk: add CLK_SET_RATE_NO_REPARENT flagJames Hogan
Add a CLK_SET_RATE_NO_REPARENT clock flag, which will prevent muxes being reparented during clk_set_rate. To avoid breaking existing platforms, all callers of clk_register_mux() are adjusted to pass the new flag. Platform maintainers are encouraged to remove the flag if they wish to allow mux reparenting on set_rate. Signed-off-by: James Hogan <james.hogan@imgtec.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Cc: Mike Turquette <mturquette@linaro.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Viresh Kumar <viresh.linux@gmail.com> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: Haojian Zhuang <haojian.zhuang@linaro.org> Cc: Chao Xie <xiechao.mail@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: "Emilio López" <emilio@elopez.com.ar> Cc: Gregory CLEMENT <gregory.clement@free-electrons.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Prashant Gaikwad <pgaikwad@nvidia.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Peter De Schrijver <pdeschrijver@nvidia.com> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Andrew Chew <achew@nvidia.com> Cc: Doug Anderson <dianders@chromium.org> Cc: Heiko Stuebner <heiko@sntech.de> Cc: Paul Walmsley <pwalmsley@nvidia.com> Cc: Sylwester Nawrocki <s.nawrocki@samsung.com> Cc: Thomas Abraham <thomas.abraham@linaro.org> Cc: Tomasz Figa <t.figa@samsung.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org Cc: spear-devel@list.st.com Cc: linux-tegra@vger.kernel.org Tested-by: Haojian Zhuang <haojian.zhuang@gmail.com> Acked-by: Stephen Warren <swarren@nvidia.com> [tegra] Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> [sunxi] Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com> [Zynq] Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-06-20clk: vexpress: Use full node name to identify individual clocksPawel Moll
Previously all the clocks were reported as "osc". Now it will be something like "/dcc/osc@0". Signed-off-by: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-04-18clk: vexpress: Add separate SP810 driverPawel Moll
Factor out the SP810 clocking code into a separate driver, selecting better (faster) parent at clk_prepare() time. This is to avoid problems with clocking infrastructure initialisation order, in particular to avoid dependency of fixed clock being initialized before SP810. It also makes vexpress platform OF-based clock initialisation code unnecessary. Signed-off-by: Pawel Moll <pawel.moll@arm.com> Tested-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Mike Turquette <mturquette@linaro.org> [mturquette@linaro.org: add .unprepare, FIXME comment, cleaned up code]
2013-02-21Merge tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds
Pull ARM SoC driver specific changes from Arnd Bergmann: - Updates to the ux500 cpufreq code - Moving the u300 DMA controller driver to drivers/dma - Moving versatile express drivers out of arch/arm for sharing with arch/arm64 - Device tree bindings for the OMAP General Purpose Memory Controller * tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (27 commits) ARM: OMAP2+: gpmc: Add device tree documentation for elm handle ARM: OMAP2+: gpmc: add DT bindings for OneNAND ARM: OMAP2+: gpmc-onenand: drop __init annotation mtd: omap-onenand: pass device_node in platform data ARM: OMAP2+: Prevent potential crash if GPMC probe fails ARM: OMAP2+: gpmc: Remove unneeded of_node_put() arm: Move sp810.h to include/linux/amba/ ARM: OMAP: gpmc: add DT bindings for GPMC timings and NAND ARM: OMAP: gpmc: enable hwecc for AM33xx SoCs ARM: OMAP: gpmc-nand: drop __init annotation mtd: omap-nand: pass device_node in platform data ARM: OMAP: gpmc: don't create devices from initcall on DT dma: coh901318: cut down on platform data abstraction dma: coh901318: merge header files dma: coh901318: push definitions into driver dma: coh901318: push header down into the DMA subsystem dma: coh901318: skip hard-coded addresses dma: coh901318: remove hardcoded target addresses dma: coh901318: push platform data into driver dma: coh901318: create a proper platform data file ...
2013-01-30arm: Move sp810.h to include/linux/amba/Catalin Marinas
Since it is now used by code under drivers/clk/ it makes sense for this file to be in a more generic location. This is required for building vexpress support on arm64. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Pawel Moll <pawel.moll@arm.com> Cc: Shiraz Hashim <shiraz.hashim@st.com> Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Pawel Moll <pawel.moll@arm.com>
2013-01-24clk: vexpress: Use common of_clk_init() functionPrashant Gaikwad
Use common of_clk_init() function for clock initialization. Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com> Tested-by: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2012-11-21clk: move IM-PD1 clocks to drivers/clkLinus Walleij
The ARM IM-PD1 add-on module has a few clock of its own, let's move also these down to the drivers/clk/versatile driver dir and get rid of any remaining oldschool Integrator clocks. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2012-11-21clk: make ICST driver handle the VCO registersLinus Walleij
It turns out that all platforms using the ICST VCO are really just touching two registers, and in the same way as well: one register with the VCO configuration as such, and one lock register that makes it possible to write to the VCO. Factor this register read/write into the ICST driver so we can reuse it in the IM-PD1 driver. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2012-11-21clk: add GPLv2 headers to the Versatile clock filesLinus Walleij
The GPLv2 headers were missing and the subsystem maintainer likes them so put them in. I am the copyright holder, so explicitly licensing these under the GPLv2. Reported-by: Mike Turquette <mturquette@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2012-10-29clk: Common clocks implementation for Versatile ExpressPawel Moll
This patch adds a DT and non-DT based implementation of the common clock infrastructure for Versatile Express platform. It registers (statically or using DT) all required fixed clocks, initialises motherboard's SP810 cell (that provides clocks for SP804 timers) and explicitly registers VE "osc" driver, to make the clock generators available early. Signed-off-by: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2012-10-29clk: Versatile Express clock generators ("osc") driverPawel Moll
This driver provides a common clock framework hardware driver for Versatile Express clock generators (a.k.a "osc") controlled via the config bus. Signed-off-by: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2012-08-25clk: convert ARM RealView to common clkLinus Walleij
This converts the ARM RealView machine over to using the common clock. The approach is similar to the one used for the Integrator, and we're reusing the ICST wrapper code. We have to put the clock intialization in the timer init function for the clocks to be available when initializing the timer, keeping them in early_init() is too early for the common clk. Since we now have to go down and compile drivers/clk/versatile a CONFIG_COMMON_CLK_VERSATILE symbol has been added so the proper code gets compiled into the kernel for either machine. A leftover CLK_VERSATILE in the Integrator Kconfig was fixed up to use the new symbol as well. Tested on ARM RealView PB1176. Cc: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2012-07-12ARM: integrator: convert to common clockLinus Walleij
This converts the Integrator platform to use common clock and the ICST driver. Since from this point not all ARM reference platforms use the clock, we define CONFIG_PLAT_VERSATILE_CLOCK and select it for all platforms except the Integrator. Open issue: I could not use the .init_early() field of the machine descriptor to initialize the clocks, but had to move them to .init_irq(), so presumably .init_early() is so early that common clock is not up, and .init_machine() is too late since it's needed for the clockevent/clocksource initialization. Any suggestions on how to solve this is very welcome. Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> [mturquette@linaro.org: use 'select' instead of versatile Kconfig] Signed-off-by: Mike Turquette <mturquette@linaro.org>
2012-07-12clk: add versatile ICST307 driverLinus Walleij
The ICST307 VCO clock has a shared driver in the ARM architecture. This patch provides a wrapper into the common clock framework so we can use the implementation in the ARM architecture without duplicating the code until all ARM platforms using this VCO are moved over. At that point we can merge the driver from the ARM platform into the generic file altogether. Cc: Russell King <linux@arm.linux.org.uk> Cc: Mike Turquette <mturquette@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> [mturquette@linaro.org: removed versatile Kconfig] Signed-off-by: Mike Turquette <mturquette@linaro.org>