regulator: mc13783: consider Power Gates as digital regulators.
GPO regulators are digital outputs that can be enabled or disabled by a
dedicated bit in mc13783 POWERMISC register.
In this family can be count in also Power Gates (PWGT1 and 2): enabled by
a dedicated pin a Power Gate is an hardware driven supply where the output
(PWGTnDRV) follow this law:
Bit PWGTxSPIEN | Pin PWGTxEN | PWGTxDRV | Read Back
0 = default | | | PWGTxSPIEN
---------------+-------------+----------+------------
1 | x | Low | 0
0 | 0 | High | 1
0 | 1 | Low | 0
As read back value of control bit reflects the PWGTxDRV state (not the
control value previously written) and mc13783 POWERMISC register contain
only regulator related bits, a dedicated function to manage these bits is
created here with the aim of tracing the real value of PWGTxSPIEN bits
and reproduce it on next writes.
All POWERMISC users _must_ use the new function to not accidentally
disable Power Gates supplies.
v2 changes:
-Better utilization of abstraction layers.
-Voltage query support. GPO's and PWGTxDRV are fixed voltage regulator
with voltage value of 3.1V and 5.5V respectively.
Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
diff --git a/include/linux/mfd/mc13783.h b/include/linux/mfd/mc13783.h
index 3568040..94cb51a 100644
--- a/include/linux/mfd/mc13783.h
+++ b/include/linux/mfd/mc13783.h
@@ -108,6 +108,8 @@
#define MC13783_REGU_V2 28
#define MC13783_REGU_V3 29
#define MC13783_REGU_V4 30
+#define MC13783_REGU_PWGT1SPI 31
+#define MC13783_REGU_PWGT2SPI 32
#define MC13783_IRQ_ADCDONE 0
#define MC13783_IRQ_ADCBISDONE 1