pinctrl: madera: Add configuration for Cirrus Logic CS47L15

This adds the pinctrl configuration for the CS47L15 codec to
the madera pinctrl driver.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20190722091015.20884-2-ckeepax@opensource.cirrus.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/cirrus/Kconfig

@@ -15,6 +15,9 @@ config PINCTRL_MADERA
 	select PINMUX
 	select GENERIC_PINCONF
 
+config PINCTRL_CS47L15
+	bool
+
 config PINCTRL_CS47L35
 	bool
 

drivers/pinctrl/cirrus/Makefile

@@ -3,6 +3,9 @@
 obj-$(CONFIG_PINCTRL_LOCHNAGAR)	+= pinctrl-lochnagar.o
 
 pinctrl-madera-objs		:= pinctrl-madera-core.o
+ifeq ($(CONFIG_PINCTRL_CS47L15),y)
+pinctrl-madera-objs		+= pinctrl-cs47l15.o
+endif
 ifeq ($(CONFIG_PINCTRL_CS47L35),y)
 pinctrl-madera-objs		+= pinctrl-cs47l35.o
 endif

drivers/pinctrl/cirrus/pinctrl-cs47l15.c

@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Pinctrl for Cirrus Logic CS47L15
+ *
+ * Copyright (C) 2018-2019 Cirrus Logic, Inc. and
+ *                         Cirrus Logic International Semiconductor Ltd.
+ */
+
+#include <linux/err.h>
+#include <linux/mfd/madera/core.h>
+
+#include "pinctrl-madera.h"
+
+/*
+ * The alt func groups are the most commonly used functions we place these at
+ * the lower function indexes for convenience, and the less commonly used gpio
+ * functions at higher indexes.
+ *
+ * To stay consistent with the datasheet the function names are the same as
+ * the group names for that function's pins
+ *
+ * Note - all 1 less than in datasheet because these are zero-indexed
+ */
+static const unsigned int cs47l15_aif1_pins[] = { 0, 1, 2, 3 };
+static const unsigned int cs47l15_aif2_pins[] = { 4, 5, 6, 7 };
+static const unsigned int cs47l15_aif3_pins[] = { 8, 9, 10, 11 };
+static const unsigned int cs47l15_spk1_pins[] = { 12, 13, 14 };
+
+static const struct madera_pin_groups cs47l15_pin_groups[] = {
+	{ "aif1", cs47l15_aif1_pins, ARRAY_SIZE(cs47l15_aif1_pins) },
+	{ "aif2", cs47l15_aif2_pins, ARRAY_SIZE(cs47l15_aif2_pins) },
+	{ "aif3", cs47l15_aif3_pins, ARRAY_SIZE(cs47l15_aif3_pins) },
+	{ "pdmspk1", cs47l15_spk1_pins, ARRAY_SIZE(cs47l15_spk1_pins) },
+};
+
+const struct madera_pin_chip cs47l15_pin_chip = {
+	.n_pins = CS47L15_NUM_GPIOS,
+	.pin_groups = cs47l15_pin_groups,
+	.n_pin_groups = ARRAY_SIZE(cs47l15_pin_groups),
+};

drivers/pinctrl/cirrus/pinctrl-madera-core.c

@@ -1004,6 +1004,10 @@ static int madera_pin_probe(struct platform_device *pdev)
 	pdev->dev.of_node = madera->dev->of_node;
 
 	switch (madera->type) {
+	case CS47L15:
+		if (IS_ENABLED(CONFIG_PINCTRL_CS47L15))
+			priv->chip = &cs47l15_pin_chip;
+		break;
 	case CS47L35:
 		if (IS_ENABLED(CONFIG_PINCTRL_CS47L35))
 			priv->chip = &cs47l35_pin_chip;

drivers/pinctrl/cirrus/pinctrl-madera.h

@@ -30,6 +30,7 @@ struct madera_pin_private {
 	struct pinctrl_dev *pctl;
 };
 
+extern const struct madera_pin_chip cs47l15_pin_chip;
 extern const struct madera_pin_chip cs47l35_pin_chip;
 extern const struct madera_pin_chip cs47l85_pin_chip;
 extern const struct madera_pin_chip cs47l90_pin_chip;