Hi, Marvell Berlin SoCs have a chip control register set providing several individual registers dealing with various controllers (pinctrl, reset, clk). This chip controller is described by a single DT node since the individual registers are spread among the chip control register bank.
Marvell Berlin also have a system control register set providing several individual registers for pinctrl or adc. Prior to this series, there was no proper way of probing properly the devices using one of the chip and system controller nodes. The pinctrl driver was probed using the DT and the reset controller had an initcall. This series aims to handle these two nodes correctly, by using the newly available simple-mfd compatible, to register all the sub-devices. Syscon is also used to provide a regmap to the sub-node drivers, so that they can access the registers of the controllers safely. In addition, the clock driver will need the regmap early during the boot, so syscon is a good choice here. Reworks were done in the Berlin pin controller and in the Berlin reset driver, to take the changes into account (proper compatibles, syscon helpers, regmap use). The actual clock driver still works with these modifications, and a dedicated series will follow to convert the Berlin clock drivers to use the regmap provided by syscon. Applies on top of v4.0-rc1 and [1]. Tested on the Marvell BG2Q DMP. Thanks! Antoine [1] https://patchwork.kernel.org/patch/5920831/ Changes since v1: - Removed the custom MFD driver for Berlin and use simple-mfd instead. Antoine Tenart (10): Documentation: bindings: update the Berlin controllers documentation ARM: berlin: select MFD_SYSCON by default reset: berlin: convert to a platform driver Documentation: bindings: move the Berlin reset documentation pinctrl: berlin: use the regmap provided by syscon pinctrl: berlin: use proper compatibles Documentation: bindings: move the Berlin pinctrl documentation ARM: berlin: rework chip and system controller nodes for BG2 ARM: berlin: rework chip and system controller nodes for BG2CD ARM: berlin: rework chip and system controller nodes for BG2Q .../devicetree/bindings/arm/marvell,berlin.txt | 73 +++++----------------- .../devicetree/bindings/pinctrl/berlin,pinctrl.txt | 43 +++++++++++++ .../devicetree/bindings/reset/berlin,reset.txt | 23 +++++++ arch/arm/boot/dts/berlin2.dtsi | 50 +++++++++------ arch/arm/boot/dts/berlin2cd.dtsi | 32 +++++++--- arch/arm/boot/dts/berlin2q.dtsi | 70 ++++++++++++--------- arch/arm/mach-berlin/Kconfig | 1 + drivers/pinctrl/berlin/berlin-bg2.c | 26 +------- drivers/pinctrl/berlin/berlin-bg2cd.c | 26 +------- drivers/pinctrl/berlin/berlin-bg2q.c | 26 +------- drivers/pinctrl/berlin/berlin.c | 9 ++- drivers/reset/reset-berlin.c | 71 ++++++++------------- 12 files changed, 216 insertions(+), 234 deletions(-) create mode 100644 Documentation/devicetree/bindings/pinctrl/berlin,pinctrl.txt create mode 100644 Documentation/devicetree/bindings/reset/berlin,reset.txt -- 2.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
