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path: root/drivers/clk
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2016-08-06rockchip: remove log2 reimplementation from clock driversHeiko Stübner
The already available ilog2 function does exactly the same in the common case than the log2 function the current clock-driver reimplement. So, simply move to that one. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Simon Glass <sjg@chromium.org>
2016-08-06clock: rk3399: add support for dwmmc 400KKever Yang
MMC core will use 400KHz for card initialize first and then switch to higher frequency like 50MHz, we need to support both 400KHz and about 50MHz for dwmmc controller. Signed-off-by: Kever Yang <kever.yang@rock-chips.com> Acked-by: Simon Glass <sjg@chromium.org>
2016-08-05move: rockchip: move clock drivers into a subdirectoryHeiko Stübner
With the number of Rockchip clock drivers increasing, don't clutter up the core drivers/clk directory with them and instead move them out of the way into a separate subdirectory. Suggested-by: Simon Glass <sjg@chromium.org> Signed-off-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Simon Glass <sjg@chromium.org> Updated for rk3399: Signed-off-by: Simon Glass <sjg@chromium.org>
2016-08-05rk3399: add basic soc driverKever Yang
This patch add driver for: - clock driver including set_rate for cpu, mmc, vop, I2C. - sysreset driver - grf syscon driver Signed-off-by: Kever Yang <kever.yang@rock-chips.com> Acked-by: Simon Glass <sjg@chromium.org>
2016-07-26rockchip: Use rockchip_get_clk() to obtain the SoC clockSimon Glass
The current code picks the first available clock. In U-Boot proper this is the oscillator device, not the SoC clock device. As a result the HDMI display does not work. Fix this by calling rockchip_get_clk() instead. Fixes: 135aa950 (clk: convert API to match reset/mailbox style) Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Anatolij Gustschin <agust@denx.de>
2016-07-26rockchip: rk3288: fix FREF_MIN_HZ constantHeiko Stübner
According to the TRM the minimum FREF frequency is 269kHz not MHz. Adapt the constant accordingly. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Simon Glass <sjg@chromium.org>
2016-07-26cosmetic: rockchip: rk3288: rename rkclk_configure_cpuHeiko Stübner
The function is very specific to the rk3288 in its arguments referencing the rk3288 cru and grf and every other rockchip soc has differing cru and grf registers. So make that function naming explicit. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Simon Glass <sjg@chromium.org>
2016-07-23ARM: uniphier: use (devm_)ioremap() instead of map_sysmem()Masahiro Yamada
This does not have much impact on behavior, but makes code look more more like Linux. The use of devm_ioremap() often helps to delete .remove callbacks entirely. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-07-22dm: clk: Remove simple version of clk_get_by_index/name()Michal Simek
Simple version of clk_get_by_index() added by: "dm: clk: Add a simple version of clk_get_by_index()" (sha1: a4b10c088c4f6ef2e2bba33e8cfea369bcbbce44) is only working for #clock-cells=<1> but not for any other values. Fixed clocks is using #clock-cells=<0> which requires full implementation. Remove simplified versions of clk_get_by_index() and use full version. Also remove empty clk_get_by_name() which is failing when it is called which is useless. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Acked-by: Stephen Warren <swarren@nvidia.com>
2016-07-15rockchip: clk: Update the rk3288 driver to support of-platdataSimon Glass
Add support for of-platdata with rk3288. This requires decoding the of-platdata struct and setting up the devices from that. Also the driver needs to be renamed to match the string that of-platdata will search for. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-15rockchip: clk: Move all DT decoding to ofdata_to_platdata()Simon Glass
It is more correct to avoid touching the device tree in the probe() method. Update the driver to work this way. Also add an error check on grf since if that fails then we should not use it. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-15dm: clk: Add support for of-platdataSimon Glass
Add support for this feature in the core clock code. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-06-24clk: sandbox: don't check clk ID against 0Stephen Warren
clk->id is unsigned, so it can't be < 0. Remove the check for that. FWIW, this issue was introduced when the clock API converted e.g. clk_get_rate()'s clock ID parameter from an int to an unsigned long (with a struct clk), without removing this check. Fixes: 135aa9500264 ("clk: convert API to match reset/mailbox style") Reported-by: Coverity Scan Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
2016-06-19clk: convert API to match reset/mailbox styleStephen Warren
The following changes are made to the clock API: * The concept of "clocks" and "peripheral clocks" are unified; each clock provider now implements a single set of clocks. This provides a simpler conceptual interface to clients, and better aligns with device tree clock bindings. * Clocks are now identified with a single "struct clk", rather than requiring clients to store the clock provider device and clock identity values separately. For simple clock consumers, this isolates clients from internal details of the clock API. * clk.h is split so it only contains the client/consumer API, whereas clk-uclass.h contains the provider API. This aligns with the recently added reset and mailbox APIs. * clk_ops .of_xlate(), .request(), and .free() are added so providers can customize these operations if needed. This also aligns with the recently added reset and mailbox APIs. * clk_disable() is added. * All users of the current clock APIs are updated. * Sandbox clock tests are updated to exercise clock lookup via DT, and clock enable/disable. * rkclk_get_clk() is removed and replaced with standard APIs. Buildman shows no clock-related errors for any board for which buildman can download a toolchain. test/py passes for sandbox (which invokes the dm clk test amongst others). Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
2016-06-06Merge http://git.denx.de/u-boot-samsungTom Rini
Signed-off-by: Tom Rini <trini@konsulko.com> Conflicts: configs/peach-pi_defconfig configs/peach-pit_defconfig
2016-05-28Merge git://git.denx.de/u-boot-dmTom Rini
For odroid-c2 (arch-meson) for now disable designware eth as meson now needs to do some harder GPIO work. Signed-off-by: Tom Rini <trini@konsulko.com> Conflicts: lib/efi_loader/efi_disk.c Modified: configs/odroid-c2_defconfig
2016-05-27rockchip: rk3288: Add clock support for the gmac ethernet interfaceSjoerd Simons
Setup the clocks for the gmac ethernet interface. This assumes the mac clock is fed by an external clock which is common on RK3288 based devices. Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk> Reviewed-by: Simon Glass <sjg@chromium.org>
2016-05-27Rename reset to sysresetStephen Warren
The current reset API implements a method to reset the entire system. In the near future, I'd like to introduce code that implements the device tree reset bindings; i.e. the equivalent of the Linux kernel's reset API. This controls resets to individual HW blocks or external chips with reset signals. It doesn't make sense to merge the two APIs into one since they have different semantic purposes. Resolve the naming conflict by renaming the existing reset API to sysreset instead, so the new reset API can be called just reset. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
2016-05-25clk: uniphier: add Media I/O clock driver support for PH1-LD11Masahiro Yamada
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-05-25clk: exynos: add clock driver for Exynos7420 SocThomas Abraham
Add a clock driver for Exynos7420 SoC. There are about 25 clock controller blocks in Exynos7420 out of which support for topc, top0 and peric1 blocks are added in this initial version of the driver. Cc: Minkyu Kang <mk7.kang@samsung.com> Cc: Simon Glass <sjg@chromium.org> Signed-off-by: Thomas Abraham <thomas.ab@samsung.com> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2016-04-24clk: uniphier: add Media I/O clock driver support for PH1-LD20Masahiro Yamada
PH1-LD20 needs this for its SD card controller. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-03-31clk: uniphier: use devm_get_addr() to get base addressMasahiro Yamada
Currently, fdtdec_get_addr_size() does not support the address translation, so it cannot handle device trees with non-straight "ranges" properties. (This would be a problem with DTS for UniPhier ARMv8 SoCs.) Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-02-14clk: uniphier: add Media I/O clock driver for UniPhier SoCsMasahiro Yamada
This is the initial commit for the UniPhier clock drivers. Currently, only the Media I/O clock is supported. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-02-01drivers: clk: Add clock driver for Microchip PIC32 Microcontroller.Purna Chandra Mandal
PIC32 clock module consists of multiple oscillators, PLLs, mutiplexers and dividers capable of supplying clock to various controllers on or off-chip. Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-01-22rockchip: spl: Support full-speed CPU in SPLSimon Glass
Add a feature which speeds up the CPU to full speed in SPL to minimise boot time. This is only supported for certain boards (at present only jerry). Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22rockchip: rk3288: clock: Fix various minor errorsSimon Glass
Fix a number of small errors which were found in reviewing the clock code. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22rockchip: clk: Add support for clocks needed by the displaysSimon Glass
The displays need to use NPLL and also select some new peripheral clocks. Add support for these to the clock driver. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22rockchip: Rename the CRU_MODE_CON fieldsSimon Glass
These should match the datasheet naming. Adjust them. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22rockchip: clk: Make rkclk_get_clk() SoC-specificSimon Glass
The current method assumes that clocks are numbered from 0 and we can determine a clock by its number. It is safer to use an ID in the clock's platform data to avoid the situation where another clock is bound before the one we expect. Move the existing code into rk3036 since it still works there. Add a new implementation for rk3288. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22dm: clk: Add a simple version of clk_get_by_index()Simon Glass
This function adds quite a bit of code to SPL and we probably don't need all the features in SPL. Add a simple version (for SPL only) to save space. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22rockchip: mmc: Update the driver to use the new clock IDSimon Glass
We can use the new clk_get_by_index() function to get the correct clock. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22rockchip: clock: Add a function to find a clock by IDSimon Glass
The current approach of using uclass_get_device() is error-prone. Another clock (for example a fixed-clock) may cause it to break. Add a function that does a proper search. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22rockchip: clk: Add a function to get a peripheral clock rateSimon Glass
It is useful to be able to read the rate of a peripheral clock. Add a handler for that. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22rockchip: clock: Rename the general clock variable to gclk_rateSimon Glass
The current name is confusing and a bit verbose. Rename it. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22rockchip: Use a separate clock ID for clocksSimon Glass
At present we use the same peripheral ID for clocks and pinctrl. While this works it is probably better to use the device tree clock binding ID for clocks. We can use the clk_get_by_index() function to find this. Update the clock drivers and the code that uses them. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-22dm: clk: Add support for decoding clocks from the device treeSimon Glass
Add a method which can locate a clock for a device, given its index. This uses the normal device tree bindings to return the clock device and the first argument which is normally used as a peripheral ID in U-Boot. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-01-22clk: add fixed rate clock driverMasahiro Yamada
This commit intends to implement "fixed-clock" as in Linux. (drivers/clk/clk-fixed-rate.c in Linux) If you need a very simple clock to just provide fixed clock rate like a crystal oscillator, you do not have to write a new driver. This driver can support it. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Simon Glass <sjg@chromium.org>
2016-01-21clk: add API to enable clockMasahiro Yamada
The most basic thing for clock is to enable it, but it is missing in this uclass. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Simon Glass <sjg@chromium.org>
2016-01-21clk: add static qualifier to local functionsMasahiro Yamada
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Simon Glass <sjg@chromium.org>
2016-01-21clk: move Kconfig options into sub-menuMasahiro Yamada
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Simon Glass <sjg@chromium.org>
2015-12-01rockchip: rk3036: Add clock driverhuang lin
Add a driver for setting up and modifying the various PLLs, peripheral clocks and mmc clocks on RK3036 Signed-off-by: Lin Huang <hl@rock-chips.com> Acked-by: Simon Glass <sjg@chromium.org>
2015-09-03rockchip: rk3288: Add clock driverSimon Glass
Add a driver for setting up and modifying the various PLLs and peripheral clocks on the RK3288. Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-18clk: rename CONFIG_SPL_CLK_SUPPORT to CONFIG_SPL_CLKMasahiro Yamada
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Stefano Babic <sbabic@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
2015-07-21dm: test: Add tests for the clk uclassSimon Glass
Add tests of each API call using a sandbox clock device. Signed-off-by: Simon Glass <sjg@chromium.org>
2015-07-21dm: Add a clock uclassSimon Glass
Clocks are an important feature of platforms and have become increasing complex with time. Most modern SoCs have multiple PLLs and dozens of clock dividers which distribute clocks to on-chip peripherals. Some SoC implementations have a clock API which is private to that SoC family, e.g. Tegra and Exynos. This is useful but it would be better to have a common API that can be understood and used throughout U-Boot. Add a simple clock API as a starting point. It supports querying and setting the rate of a clock. Each clock is a device. To reduce memory and processing overhead the concept of peripheral clocks is provided. These do not need to be explicit devices - it is possible to write a driver that can adjust the I2C clock (for example) without an explicit I2C clock device. This can dramatically reduce the number of devices (and associated overhead) in a complex SoC. Clocks are referenced by a number, and it is expected that SoCs will define that numbering themselves via an enum. Signed-off-by: Simon Glass <sjg@chromium.org>
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