This patch series adds cpufreq-dt support to Freescale i.MX23 and i.MX28. It's the result of some discussions since August 2014 [1],[2],[3]. Summary ======= Patch 1,2 - add driver for mxs power subsystem Patch 3,4,5 - enable regulator support for i.MX23/i.MX28 Patch 6,7 - enable cpufreq-dt support for i.MX23/i.MX28 The main use of mxs_power driver is to trigger probing of the underlying DT child nodes like the on-chip regulators. The mxs-regulator driver provides for instance the voltage scaling support. A detailed description of the MXS power subsystem is in the reference manual [4],[5]. Known issue =========== The mxs clock driver provide the clock rate in Hz (454736842), but the operating points must be specified in kHz with less precision (454737). So we get the following warning on boot [4]: cpufreq: __cpufreq_add_dev: CPU0: Running at unlisted freq: 454736 KHz cpufreq: __cpufreq_add_dev: CPU0: Unlisted initial frequency changed to: 454737 KHz Changes ======= - rebase on next-20150320 - complete rewrite of regulator ops based on helper functions and imx-bootlets - move DC-DC handling from mxs_power into mxs-regulator - make DC-DC switching frequency a device tree property - fix NULL pointer dereference in mxs_power_remove() - add i.MX23 support - add cpufreq-dt support [1] - http://www.spinics.net/lists/arm-kernel/msg356455.html [2] - https://lkml.org/lkml/2014/9/26/932 [3] - http://lists.infradead.org/pipermail/linux-arm-kernel/2014-November/304688.html [4] - http://cache.freescale.com/files/dsp/doc/ref_manual/IMX23RM.pdf [5] - http://cache.freescale.com/files/dsp/doc/ref_manual/MCIMX28RM.pdf [6] - http://marc.info/?l=linux-pm&m=141225587213505&w=2 Stefan Wahren (7): DT: add binding for mxs power subsystem power: mxs_power: add driver for mxs power subsystem DT: add binding for MXS regulator regulator: add mxs regulator driver ARM: dts: enable regulator support for i.MX23/i.MX28 ARM: mxs: register cpufreq-dt in pm init ARM: dts: add OPPs for i.MX23/i.MX28 .../devicetree/bindings/power/mxs_power.txt | 23 + .../bindings/regulator/mxs-regulator.txt | 70 +++ arch/arm/boot/dts/imx23.dtsi | 82 ++- arch/arm/boot/dts/imx28.dtsi | 82 ++- arch/arm/mach-mxs/pm.c | 6 + drivers/power/Kconfig | 8 + drivers/power/Makefile | 1 + drivers/power/mxs_power.c | 146 +++++ drivers/regulator/Kconfig | 8 + drivers/regulator/Makefile | 1 + drivers/regulator/mxs-regulator.c | 624 ++++++++++++++++++++ 11 files changed, 1045 insertions(+), 6 deletions(-) create mode 100644 Documentation/devicetree/bindings/power/mxs_power.txt create mode 100644 Documentation/devicetree/bindings/regulator/mxs-regulator.txt create mode 100644 drivers/power/mxs_power.c create mode 100644 drivers/regulator/mxs-regulator.c -- 1.7.9.5 -- 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
