pinctrl: meson-axg: Introduce a pinctrl pinmux ops for Meson-AXG SoC

The pin controller has been updated in the Amlogic Meson AXG series,
which use continuous 4-bit register to select function for each pin.
In order to support this, a new pinmux operations "meson_axg_pmx_ops"
has been added.

Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Xingyu Chen <xingyu.chen@amlogic.com>
Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
Reviewed-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 62 insertions, 0 deletions

diff --git a/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.h b/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.h
new file mode 100644
index 000000000000..8ff88bf2e849
--- /dev/null
+++ b/drivers/pinctrl/meson/pinctrl-meson-axg-pmx.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2017 Baylibre SAS.
+ * Author:  Jerome Brunet  <jbrunet@baylibre.com>
+ *
+ * Copyright (c) 2017 Amlogic, Inc. All rights reserved.
+ * Author: Xingyu Chen <xingyu.chen@amlogic.com>
+ *
+ * SPDX-License-Identifier: (GPL-2.0+ or MIT)
+ */
+
+struct meson_pmx_bank {
+	const char *name;
+	unsigned int first;
+	unsigned int last;
+	unsigned int reg;
+	unsigned int offset;
+};
+
+struct meson_axg_pmx_data {
+	struct meson_pmx_bank *pmx_banks;
+	unsigned int num_pmx_banks;
+};
+
+#define BANK_PMX(n, f, l, r, o)				\
+	{							\
+		.name   = n,					\
+		.first	= f,					\
+		.last	= l,					\
+		.reg	= r,					\
+		.offset = o,					\
+	}
+
+struct meson_pmx_axg_data {
+        unsigned int func;
+};
+
+#define PMX_DATA(f)							\
+	{								\
+		.func = f,						\
+	}
+
+#define GROUP(grp, f)							\
+	{								\
+		.name = #grp,						\
+		.pins = grp ## _pins,                                   \
+		.num_pins = ARRAY_SIZE(grp ## _pins),			\
+		.data = (const struct meson_pmx_axg_data[]){		\
+			PMX_DATA(f),					\
+		},							\
+	}
+
+#define GPIO_GROUP(gpio)						\
+	{								\
+		.name = #gpio,						\
+		.pins = (const unsigned int[]){ gpio },			\
+		.num_pins = 1,						\
+		.data = (const struct meson_pmx_axg_data[]){		\
+			PMX_DATA(0),					\
+		},							\
+	}
+
+extern const struct pinmux_ops meson_axg_pmx_ops;