RE: [PATCH 3/7] PM / devfreq: Add generic imx bus driver

Add initial support for dynamic frequency switching on pieces of the imx
interconnect fabric.

All this driver actually does is set a clk rate based on an opp table.

No attempt is made to map registers or anything clever.

Signed-off-by: Leonard Crestez <redacted>
---
drivers/devfreq/Kconfig       |  12 +++
drivers/devfreq/Makefile      |   1 +
drivers/devfreq/imx-devfreq.c | 148 ++++++++++++++++++++++++++++++++++
3 files changed, 161 insertions(+)
create mode 100644 drivers/devfreq/imx-devfreq.c

diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig
index defe1d438710..9088a151bafe 100644
--- a/drivers/devfreq/Kconfig
+++ b/drivers/devfreq/Kconfig

@@ -90,10 +90,22 @@ config ARM_EXYNOS_BUS_DEVFREQ

	  Each memory bus group could contain many memoby bus block. It reads
	  PPMU counters of memory controllers by using DEVFREQ-event device
	  and adjusts the operating frequencies and voltages with OPP support.
	  This does not yet operate with optimal voltages.

+config ARM_IMX_DEVFREQ
+	tristate "i.MX DEVFREQ Driver"
+	depends on ARCH_MXC || COMPILE_TEST
+	select DEVFREQ_GOV_PASSIVE
+	select DEVFREQ_GOV_SIMPLE_ONDEMAND
+	select DEVFREQ_GOV_USERSPACE
+	select PM_OPP