Hi everyone, This is the PRCM subset of v3 of the sun8i A23 bring-up series. This subset includes clock and reset controller support for the PRCM (power, reset and clock module) on the A23 SoC. It is based on my previous series for basic sun8i A23 clocks [1]. The first 3 patches add or fix the prcm clock drivers to support the A23's PRCM variant. The fourth patch adds support for A23's PRCM to the sun6i-prcm driver. The difference between the A23 and the A31 regarding the PRCM block is 2 clock muxes were removed, a divider clock has slightly difference dividers, and some clock gates are gone. The resources used are unchanged. Drivers for the 2 clock muxes are replaced with fixed-factor clocks in the DT. So the A23 variant is supported with the sun6i-prcm driver with a slightly different sub-device list. Patch 5 adds optional reset control support to the 8250_dw, which is used by sun6i and sun8i platforms. Till now, this wasn't needed from a working standpoint, as the bootloader de-asserts the reset control on the console UART for us. However, during the development of the sun8i patches, I noticed other UARTs wouldn't work. Also the new sun6i A31 Hummingbird has multiple UARTs available, which would require this patch. Patch 6 adds deferred probing to 8250_dw. In my case, even though the clocks and reset controller "devices" were registered before the UART, the 8250_dw driver binded with the UART devices before the clocks and resets were available. This resulted in the 8250_dw driver failing. I only tested the R_UART device. Strictly speaking it won't be needed once pinctrl support is added, as the driver core handles deferred probing for pinctrl phandles, and the pinctrl device for the R_UART is probed after it. However it may be required for the A31 Hummingbird development board. Suggestions welcome. Patch 7 selects the sun6i-prcm driver when we're building for sun8i, so we don't end up with essential drivers missing. Patch 8 adds the PRCM nodes, and the associated clock/reset phandles, to the sun8i DTSI. Patch 9 adds the reset controller nodes to the sun8i DTSI, using drivers from sun6i, as an extra. I thought I'd do all the reset controllers in the same series. These patches can go through their separate trees. There are no compile time dependencies between them. Related changes since v2: - Add separate driver for sun8i-a23-apb0-clk - Use sun6i-a31-clock-reset for ahb1_rst Related changes since v1: - Add sun8i-a23-apb0-gates-clk compatible to sun6i-a31-apb0-gates-clk Cheers ChenYu [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2014-June/266990.html Chen-Yu Tsai (9): clk: sunxi: Add A23 APB0 divider clock support clk: sunxi: Fix gate indexing for sun6i-a31-apb0-gates clk: sunxi: Add A23 specific compatible to sun6i-a31-apb0-gates-clk mfd: sun6i-prcm: Add support for Allwinner A23 PRCM serial: 8250_dw: Add optional reset control support serial: 8250_dw: Add support for deferred probing ARM: sunxi: select MFD_SUN6I_PRCM when sun8i arch support is enabled ARM: sun8i: Add PRCM clock and reset controller nodes to the DTSI ARM: sun8i: Add reset controller nodes to the DTSI Documentation/devicetree/bindings/clock/sunxi.txt | 2 + .../devicetree/bindings/mfd/sun6i-prcm.txt | 2 +- .../bindings/serial/snps-dw-apb-uart.txt | 1 + arch/arm/boot/dts/sun8i-a23.dtsi | 71 +++++++++++++++++++++- arch/arm/mach-sunxi/Kconfig | 3 + drivers/clk/sunxi/Makefile | 4 +- drivers/clk/sunxi/clk-sun6i-apb0-gates.c | 7 ++- drivers/clk/sunxi/clk-sun8i-apb0.c | 68 +++++++++++++++++++++ drivers/mfd/sun6i-prcm.c | 30 +++++++++ drivers/tty/serial/8250/8250_dw.c | 13 ++++ 10 files changed, 197 insertions(+), 4 deletions(-) create mode 100644 drivers/clk/sunxi/clk-sun8i-apb0.c -- 2.0.1 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
