[PATCH 05/14] mfd: twl6040: Register child device for twl6040-pdmclk

Peter Ujfalusi
2016-05-18T13:46:27Z

The McPDM in OMAP4/5 is using the pdmclk from twl6040 as functional clock.
The twl6040-pdmclk driver provides a clock which can be used to make sure
that the pdmclk is active when the McPDM is in use.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
Documentation/devicetree/bindings/mfd/twl6040.txt | 1 +
drivers/mfd/twl6040.c | 5 +++++
include/linux/mfd/twl6040.h | 2 +-
3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mfd/twl6040.txt b/Documentation/devicetree/bindings/mfd/twl6040.txt
index e6afdfa3543d..9a98ee7c323d 100644
--- a/Documentation/devicetree/bindings/mfd/twl6040.txt
+++ b/Documentation/devicetree/bindings/mfd/twl6040.txt
@@ -12,6 +12,7 @@ Required properties:
- interrupt-parent: The parent interrupt controller
- gpio-controller:
- #gpio-cells = <1>: twl6040 provides GPO lines.
+- #clock-cells = <0>; twl6040 is a provider of pdmclk which is used by McPDM
- twl6040,audpwron-gpio: Power on GPIO line for the twl6040

- vio-supply: Regulator for the twl6040 VIO supply
diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c
index 2596546553aa..873628a1bd79 100644
--- a/drivers/mfd/twl6040.c
+++ b/drivers/mfd/twl6040.c
@@ -782,6 +782,11 @@ static int twl6040_probe(struct i2c_client *client,
cell->name = "twl6040-gpo";
children++;

+ /* PDM clock support */
+ cell = &twl6040->cells[children];
+ cell->name = "twl6040-pdmclk";
+ children++;
+
/* The chip is powered down so mark regmap to cache only and dirty */
regcache_cache_only(twl6040->regmap, true);
regcache_mark_dirty(twl6040->regmap);
diff --git a/include/linux/mfd/twl6040.h b/include/linux/mfd/twl6040.h
index 8015db974157..ef0bb07c3f3d 100644
--- a/include/linux/mfd/twl6040.h
+++ b/include/linux/mfd/twl6040.h
@@ -168,7 +168,7 @@
#define TWL6040_VIBROCDET 0x20
#define TWL6040_TSHUTDET 0x40

-#define TWL6040_CELLS 3
+#define TWL6040_CELLS 4

#define TWL6040_REV_ES1_0 0x00
#define TWL6040_REV_ES1_1 0x01 /* Rev ES1.1 and ES1.2 */
--
2.8.2