clk: si5351: Add DT property to enable PLL reset

Add optional output clock DT property to enable PLL reset when a clock
output is enabled.

Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Rabeeh Khoury <rabeeh@solid-run.com>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Sergej Sawazki <sergej@taudac.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

3 files changed, 6 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/silabs,si5351.txt b/Documentation/devicetree/bindings/clock/silabs,si5351.txt
index a6c4ef343b44..f00191cad8cd 100644
--- a/Documentation/devicetree/bindings/clock/silabs,si5351.txt
+++ b/Documentation/devicetree/bindings/clock/silabs,si5351.txt
@@ -49,6 +49,7 @@ Optional child node properties:
 - silabs,multisynth-source: source pll A(0) or B(1) of corresponding multisynth
   divider.
 - silabs,pll-master: boolean, multisynth can change pll frequency.
+- silabs,pll-reset: boolean, clock output can reset its pll.
 - silabs,disable-state : clock output disable state, shall be
   0 = clock output is driven LOW when disabled
   1 = clock output is driven HIGH when disabled
diff --git a/drivers/clk/clk-si5351.c b/drivers/clk/clk-si5351.c
index 36a15f161dfd..f63fcc0d8cf5 100644
--- a/drivers/clk/clk-si5351.c
+++ b/drivers/clk/clk-si5351.c
@@ -1297,6 +1297,9 @@ static int si5351_dt_parse(struct i2c_client *client,
 
 		pdata->clkout[num].pll_master =
 			of_property_read_bool(child, "silabs,pll-master");
+
+		pdata->clkout[num].pll_reset =
+			of_property_read_bool(child, "silabs,pll-reset");
 	}
 	client->dev.platform_data = pdata;
 
diff --git a/include/linux/platform_data/si5351.h b/include/linux/platform_data/si5351.h
index 818c5c6e203f..c71a2dd66143 100644
--- a/include/linux/platform_data/si5351.h
+++ b/include/linux/platform_data/si5351.h
@@ -86,6 +86,7 @@ enum si5351_disable_state {
  * @multisynth_src: multisynth source clock
  * @clkout_src: clkout source clock
  * @pll_master: if true, clkout can also change pll rate
+ * @pll_reset: if true, clkout can reset its pll
  * @drive: output drive strength
  * @rate: initial clkout rate, or default if 0
  */
@@ -95,6 +96,7 @@ struct si5351_clkout_config {
 	enum si5351_drive_strength drive;
 	enum si5351_disable_state disable_state;
 	bool pll_master;
+	bool pll_reset;
 	unsigned long rate;
 };