This hardware block could at used at same time for PWM generation
and IIO timers.
PWM and IIO timer configuration are mixed in the same registers
so we need a multi fonction driver to be able to share those registers.

version 7:
- rebase on v4.10-rc2

version 6:
- rename files to stm32-timers
- rename functions to stm32_timers_xxx

version 5:
- fix Lee comments about detect function
- add missing dependency on REGMAP_MMIO

version 4:
- add a function to detect Auto Reload Register (ARR) size
- rename the structure shared with other drivers

version 2:
- rename driver "stm32-gptimer" to be align with SoC documentation
- only keep one compatible
- use of_platform_populate() instead of devm_mfd_add_devices()

Signed-off-by: Benjamin Gaignard <redacted>
---
 .../devicetree/bindings/mfd/stm32-timers.txt       |  2 +-
 drivers/mfd/Kconfig                                | 11 +++
 drivers/mfd/Makefile                               |  2 +
 drivers/mfd/stm32-timers.c                         | 80 ++++++++++++++++++++++
 include/linux/mfd/stm32-timers.h                   | 71 +++++++++++++++++++
 5 files changed, 165 insertions(+), 1 deletion(-)
 create mode 100644 drivers/mfd/stm32-timers.c
 create mode 100644 include/linux/mfd/stm32-timers.h

diff --git a/Documentation/devicetree/bindings/mfd/stm32-timers.txt b/Documentation/devicetree/bindings/mfd/stm32-timers.txt
index a73301d..897e7c2 100644
--- a/Documentation/devicetree/bindings/mfd/stm32-timers.txt
+++ b/Documentation/devicetree/bindings/mfd/stm32-timers.txt

@@ -12,7 +12,7 @@ Required parameters:
 
 - reg:			Physical base address and length of the controller's
 			registers.
-- clock-names: 		Set to "int".
+- clock-names:		Set to "int".