devicetree.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* [PATCH 1/2] mfd: arizona: Update reset pin to use GPIOD
@ 2018-02-14 15:55 Charles Keepax
  2018-02-14 15:55 ` [PATCH 2/2] mfd: arizona: Update DT doc to support more standard reset binding Charles Keepax
                   ` (2 more replies)
  0 siblings, 3 replies; 6+ messages in thread
From: Charles Keepax @ 2018-02-14 15:55 UTC (permalink / raw)
  To: lee.jones-QSEj5FYQhm4dnm+yROfE0A
  Cc: robh+dt-DgEjT+Ai2ygdnm+yROfE0A, mark.rutland-5wv7dgnIgG8,
	linus.walleij-QSEj5FYQhm4dnm+yROfE0A,
	devicetree-u79uwXL29TY76Z2rM5mHXA,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA,
	patches-yzvPICuk2AA4QjBA90+/kJqQE7yCjDx5

Now GPIOD has support for both pdata systems and for non-standard DT
bindings the Arizona reset GPIO can be converted to use it.

Signed-off-by: Charles Keepax <ckeepax-yzvPICuk2AA4QjBA90+/kJqQE7yCjDx5@public.gmane.org>
---
 drivers/mfd/arizona-core.c        | 50 ++++++++++++++++++++++++++-------------
 include/linux/mfd/arizona/pdata.h |  3 ++-
 2 files changed, 35 insertions(+), 18 deletions(-)

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index 77875250abe5..50e35e90d42b 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -278,8 +278,7 @@ static int arizona_wait_for_boot(struct arizona *arizona)
 
 static inline void arizona_enable_reset(struct arizona *arizona)
 {
-	if (arizona->pdata.reset)
-		gpio_set_value_cansleep(arizona->pdata.reset, 0);
+	gpiod_set_value_cansleep(arizona->pdata.reset, 0);
 }
 
 static void arizona_disable_reset(struct arizona *arizona)
@@ -295,7 +294,7 @@ static void arizona_disable_reset(struct arizona *arizona)
 			break;
 		}
 
-		gpio_set_value_cansleep(arizona->pdata.reset, 1);
+		gpiod_set_value_cansleep(arizona->pdata.reset, 1);
 		usleep_range(1000, 5000);
 	}
 }
@@ -799,14 +798,25 @@ static int arizona_of_get_core_pdata(struct arizona *arizona)
 	struct arizona_pdata *pdata = &arizona->pdata;
 	int ret, i;
 
-	pdata->reset = of_get_named_gpio(arizona->dev->of_node, "wlf,reset", 0);
-	if (pdata->reset == -EPROBE_DEFER) {
-		return pdata->reset;
-	} else if (pdata->reset < 0) {
-		dev_err(arizona->dev, "Reset GPIO missing/malformed: %d\n",
-			pdata->reset);
+	pdata->reset = devm_gpiod_get_from_of_node(arizona->dev,
+						   arizona->dev->of_node,
+						   "wlf,reset", 0,
+						   GPIOD_OUT_LOW,
+						   "arizona /RESET");
+	if (IS_ERR(pdata->reset)) {
+		ret = PTR_ERR(pdata->reset);
+		switch (ret) {
+		case -ENOENT:
+			break;
+		case -EPROBE_DEFER:
+			return ret;
+		default:
+			dev_err(arizona->dev, "Reset GPIO malformed: %d\n",
+				ret);
+			break;
+		}
 
-		pdata->reset = 0;
+		pdata->reset = NULL;
 	}
 
 	ret = of_property_read_u32_array(arizona->dev->of_node,
@@ -1050,14 +1060,20 @@ int arizona_dev_init(struct arizona *arizona)
 		goto err_early;
 	}
 
-	if (arizona->pdata.reset) {
+	if (!arizona->pdata.reset) {
 		/* Start out with /RESET low to put the chip into reset */
-		ret = devm_gpio_request_one(arizona->dev, arizona->pdata.reset,
-					    GPIOF_DIR_OUT | GPIOF_INIT_LOW,
-					    "arizona /RESET");
-		if (ret != 0) {
-			dev_err(dev, "Failed to request /RESET: %d\n", ret);
-			goto err_dcvdd;
+		arizona->pdata.reset = devm_gpiod_get(arizona->dev, "wlf,reset",
+						      GPIOD_OUT_LOW);
+		if (IS_ERR(arizona->pdata.reset)) {
+			ret = PTR_ERR(arizona->pdata.reset);
+			if (ret == -EPROBE_DEFER)
+				goto err_dcvdd;
+			else
+				dev_err(arizona->dev,
+					"Reset GPIO missing/malformed: %d\n",
+					ret);
+
+			arizona->pdata.reset = NULL;
 		}
 	}
 
diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h
index f72dc53848d7..0013075d4cda 100644
--- a/include/linux/mfd/arizona/pdata.h
+++ b/include/linux/mfd/arizona/pdata.h
@@ -56,6 +56,7 @@
 #define ARIZONA_MAX_PDM_SPK 2
 
 struct regulator_init_data;
+struct gpio_desc;
 
 struct arizona_micbias {
 	int mV;                    /** Regulated voltage */
@@ -77,7 +78,7 @@ struct arizona_micd_range {
 };
 
 struct arizona_pdata {
-	int reset;      /** GPIO controlling /RESET, if any */
+	struct gpio_desc *reset;      /** GPIO controlling /RESET, if any */
 
 	/** Regulator configuration for MICVDD */
 	struct arizona_micsupp_pdata micvdd;
-- 
2.11.0

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

^ permalink raw reply related	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2018-02-22 14:46 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-02-14 15:55 [PATCH 1/2] mfd: arizona: Update reset pin to use GPIOD Charles Keepax
2018-02-14 15:55 ` [PATCH 2/2] mfd: arizona: Update DT doc to support more standard reset binding Charles Keepax
2018-02-19  3:13   ` Rob Herring
2018-02-19 10:28     ` Charles Keepax
     [not found] ` <20180214155512.17218-1-ckeepax-yzvPICuk2AA4QjBA90+/kJqQE7yCjDx5@public.gmane.org>
2018-02-14 16:05   ` [PATCH 1/2] mfd: arizona: Update reset pin to use GPIOD Charles Keepax
2018-02-22 14:46 ` Linus Walleij

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).