pinctrl: add driver for meson-gxbb pin controller
Add a pin controller driver for Meson GXBB adapted from Linux kernel.
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/pinctrl/meson/pinctrl-meson.h b/drivers/pinctrl/meson/pinctrl-meson.h
new file mode 100644
index 0000000..4127a60
--- /dev/null
+++ b/drivers/pinctrl/meson/pinctrl-meson.h
@@ -0,0 +1,74 @@
+/*
+ * (C) Copyright 2016 - Beniamino Galvani <b.galvani@gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __PINCTRL_MESON_H__
+#define __PINCTRL_MESON_H__
+
+#include <linux/types.h>
+
+struct meson_pmx_group {
+ const char *name;
+ const unsigned int *pins;
+ unsigned int num_pins;
+ bool is_gpio;
+ unsigned int reg;
+ unsigned int bit;
+};
+
+struct meson_pmx_func {
+ const char *name;
+ const char * const *groups;
+ unsigned int num_groups;
+};
+
+struct meson_pinctrl_data {
+ const char *name;
+ struct meson_pmx_group *groups;
+ struct meson_pmx_func *funcs;
+ unsigned int pin_base;
+ unsigned int num_pins;
+ unsigned int num_groups;
+ unsigned int num_funcs;
+};
+
+struct meson_pinctrl {
+ struct meson_pinctrl_data *data;
+ void __iomem *reg_mux;
+};
+
+#define PIN(x, b) (b + x)
+
+#define GROUP(grp, r, b) \
+ { \
+ .name = #grp, \
+ .pins = grp ## _pins, \
+ .num_pins = ARRAY_SIZE(grp ## _pins), \
+ .reg = r, \
+ .bit = b, \
+ }
+
+#define GPIO_GROUP(gpio, b) \
+ { \
+ .name = #gpio, \
+ .pins = (const unsigned int[]){ PIN(gpio, b) }, \
+ .num_pins = 1, \
+ .is_gpio = true, \
+ }
+
+#define FUNCTION(fn) \
+ { \
+ .name = #fn, \
+ .groups = fn ## _groups, \
+ .num_groups = ARRAY_SIZE(fn ## _groups), \
+ }
+
+#define MESON_PIN(x, b) PINCTRL_PIN(PIN(x, b), #x)
+
+extern const struct pinctrl_ops meson_pinctrl_ops;
+
+int meson_pinctrl_probe(struct udevice *dev);
+
+#endif /* __PINCTRL_MESON_H__ */