This patch set adds a clk driver for the low power clocks found in the CREG block on lpc18xx. CREG is a collection of miscellaneous configuration registers that can be accessed through a syscon regmap interface. The clk driver makes it possible to setup and enabled these two clocks. This need to support peripherals like the internal RTC on the lpc18xx platform. The driver has one early init using CLK_OF_DECLARE and a standard platform driver. The early init is used to register the 32KHZ clk which may be needed early on. The other clock (1KHZ) is registered when the platform driver probe runs. This version splits clk array into clk_creg_early and clk_creg. I think this will work as long as clk_creg_early is _not_ used after the clk_creg is registered. You can find a diff of changes between v2 and v3 here: https://github.com/manabian/linux-lpc/commit/32e1e5da9bf30be3631c4ee93dbe4550d366431b This seems to work, but I currently don't have a setup that requires the 32khz clock early so that part isn't really tested. The probe deferral seems to work for the RTC: [ 3.386861] lpc24xx-rtc 40046000.rtc: error getting rtc clock [ 6.737615] lpc24xx-rtc 40046000.rtc: rtc core: registered lpc24xx-rtc as rtc0 Changes since v2: - Use two clk arrays for registration. - Couple of minor cleanups. Changes since v1: - Split driver with one early init and one platform driver probe. - Rebase on v4.5-rc1. Joachim Eastwood (2): clk: add lpc18xx creg clk driver doc: dt: add documentation for lpc1850-creg-clk driver .../devicetree/bindings/clock/lpc1850-creg-clk.txt | 52 +++++ drivers/clk/nxp/Makefile | 1 + drivers/clk/nxp/clk-lpc18xx-creg.c | 210 +++++++++++++++++++++ 3 files changed, 263 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/lpc1850-creg-clk.txt create mode 100644 drivers/clk/nxp/clk-lpc18xx-creg.c -- 1.8.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
