[PATCH 04/17] gpio: dwapb_gpio: Enable all clocks

On some SoC (such as RZ/N1) it is necessary to enable clocks prior to
using the register interface.

Signed-off-by: Ralph Siemsen <[email protected]>
---
 drivers/gpio/dwapb_gpio.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/dwapb_gpio.c b/drivers/gpio/dwapb_gpio.c
index 7ab48780332..6fa50a2c2af 100644
--- a/drivers/gpio/dwapb_gpio.c
+++ b/drivers/gpio/dwapb_gpio.c
@@ -7,6 +7,7 @@
 
 #include <asm/gpio.h>
 #include <asm/io.h>
+#include <clk.h>
 #include <dm/device.h>
 #include <dm/device-internal.h>
 #include <dm/device_compat.h>
@@ -28,6 +29,7 @@
 
 struct gpio_dwapb_priv {
 	struct reset_ctl_bulk	resets;
+	struct clk_bulk		clks;
 };
 
 struct gpio_dwapb_plat {
@@ -136,8 +138,13 @@ static int gpio_dwapb_probe(struct udevice *dev)
 {
 	struct gpio_dev_priv *priv = dev_get_uclass_priv(dev);
 	struct gpio_dwapb_plat *plat = dev_get_plat(dev);
+	struct gpio_dwapb_priv *dw_priv = dev_get_priv(dev);
 
 	if (!plat) {
+		/* Enable clocks on parent device only */
+		if (clk_get_bulk(dev, &dw_priv->clks) == 0)
+			clk_enable_bulk(&dw_priv->clks);
+
 		/* Reset on parent device only */
 		return gpio_dwapb_reset(dev);
 	}
@@ -214,8 +221,10 @@ static int gpio_dwapb_remove(struct udevice *dev)
 	struct gpio_dwapb_plat *plat = dev_get_plat(dev);
 	struct gpio_dwapb_priv *priv = dev_get_priv(dev);
 
-	if (!plat && priv)
+	if (!plat && priv) {
+		clk_release_bulk(&priv->clks);
 		return reset_release_bulk(&priv->resets);
+	}
 
 	return 0;
 }

-- 
2.55.0