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* clk: uniphier: add Media I/O clock driver for UniPhier SoCsMasahiro Yamada2016-02-141-0/+1
| | | | | | | 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>
* drivers: clk: Add clock driver for Microchip PIC32 Microcontroller.Purna Chandra Mandal2016-02-011-0/+1
| | | | | | | | | | 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>
* clk: add fixed rate clock driverMasahiro Yamada2016-01-211-1/+1
| | | | | | | | | | | | 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>
* rockchip: rk3036: Add clock driverhuang lin2015-12-011-0/+1
| | | | | | | | 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>
* rockchip: rk3288: Add clock driverSimon Glass2015-09-021-0/+1
| | | | | | | 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>
* dm: test: Add tests for the clk uclassSimon Glass2015-07-211-0/+1
| | | | | | Add tests of each API call using a sandbox clock device. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Add a clock uclassSimon Glass2015-07-211-0/+8
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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