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>

5 files changed, 702 insertions, 0 deletions

diff --git a/drivers/pinctrl/meson/Kconfig b/drivers/pinctrl/meson/Kconfig
new file mode 100644
index 00000000000..c3e6901b9a9
--- /dev/null
+++ b/drivers/pinctrl/meson/Kconfig
@@ -0,0 +1,11 @@
+if ARCH_MESON
+
+config PINCTRL_MESON
+	depends on PINCTRL_GENERIC
+	bool
+
+config PINCTRL_MESON_GXBB
+	bool "Amlogic Meson GXBB SoC pinctrl driver"
+	select PINCTRL_MESON
+
+endif
diff --git a/drivers/pinctrl/meson/Makefile b/drivers/pinctrl/meson/Makefile
new file mode 100644
index 00000000000..6dde4bcb689
--- /dev/null
+++ b/drivers/pinctrl/meson/Makefile
@@ -0,0 +1,6 @@
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y					+= pinctrl-meson.o
+obj-$(CONFIG_PINCTRL_MESON_GXBB)	+= pinctrl-meson-gxbb.o
diff --git a/drivers/pinctrl/meson/pinctrl-meson-gxbb.c b/drivers/pinctrl/meson/pinctrl-meson-gxbb.c
new file mode 100644
index 00000000000..a0a7de5f0fd
--- /dev/null
+++ b/drivers/pinctrl/meson/pinctrl-meson-gxbb.c
@@ -0,0 +1,432 @@
+/*
+ * (C) Copyright 2016 - Beniamino Galvani <b.galvani@gmail.com>
+ *
+ * Based on code from Linux kernel:
+ *   Copyright (C) 2016 Endless Mobile, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <dm/device.h>
+#include <dm/pinctrl.h>
+#include <dt-bindings/gpio/meson-gxbb-gpio.h>
+
+#include "pinctrl-meson.h"
+
+#define EE_OFF	14
+
+static const unsigned int emmc_nand_d07_pins[] = {
+	PIN(BOOT_0, EE_OFF), PIN(BOOT_1, EE_OFF), PIN(BOOT_2, EE_OFF),
+	PIN(BOOT_3, EE_OFF), PIN(BOOT_4, EE_OFF), PIN(BOOT_5, EE_OFF),
+	PIN(BOOT_6, EE_OFF), PIN(BOOT_7, EE_OFF),
+};
+static const unsigned int emmc_clk_pins[] = { PIN(BOOT_8, EE_OFF) };
+static const unsigned int emmc_cmd_pins[] = { PIN(BOOT_10, EE_OFF) };
+static const unsigned int emmc_ds_pins[] = { PIN(BOOT_15, EE_OFF) };
+
+static const unsigned int sdcard_d0_pins[] = { PIN(CARD_1, EE_OFF) };
+static const unsigned int sdcard_d1_pins[] = { PIN(CARD_0, EE_OFF) };
+static const unsigned int sdcard_d2_pins[] = { PIN(CARD_5, EE_OFF) };
+static const unsigned int sdcard_d3_pins[] = { PIN(CARD_4, EE_OFF) };
+static const unsigned int sdcard_cmd_pins[] = { PIN(CARD_3, EE_OFF) };
+static const unsigned int sdcard_clk_pins[] = { PIN(CARD_2, EE_OFF) };
+
+static const unsigned int uart_tx_a_pins[]	= { PIN(GPIOX_12, EE_OFF) };
+static const unsigned int uart_rx_a_pins[]	= { PIN(GPIOX_13, EE_OFF) };
+static const unsigned int uart_cts_a_pins[]	= { PIN(GPIOX_14, EE_OFF) };
+static const unsigned int uart_rts_a_pins[]	= { PIN(GPIOX_15, EE_OFF) };
+
+static const unsigned int uart_tx_b_pins[]	= { PIN(GPIODV_24, EE_OFF) };
+static const unsigned int uart_rx_b_pins[]	= { PIN(GPIODV_25, EE_OFF) };
+static const unsigned int uart_cts_b_pins[]	= { PIN(GPIODV_26, EE_OFF) };
+static const unsigned int uart_rts_b_pins[]	= { PIN(GPIODV_27, EE_OFF) };
+
+static const unsigned int uart_tx_c_pins[]	= { PIN(GPIOY_13, EE_OFF) };
+static const unsigned int uart_rx_c_pins[]	= { PIN(GPIOY_14, EE_OFF) };
+static const unsigned int uart_cts_c_pins[]	= { PIN(GPIOX_11, EE_OFF) };
+static const unsigned int uart_rts_c_pins[]	= { PIN(GPIOX_12, EE_OFF) };
+
+static const unsigned int eth_mdio_pins[]	= { PIN(GPIOZ_0, EE_OFF) };
+static const unsigned int eth_mdc_pins[]	= { PIN(GPIOZ_1, EE_OFF) };
+static const unsigned int eth_clk_rx_clk_pins[]	= { PIN(GPIOZ_2, EE_OFF) };
+static const unsigned int eth_rx_dv_pins[]	= { PIN(GPIOZ_3, EE_OFF) };
+static const unsigned int eth_rxd0_pins[]	= { PIN(GPIOZ_4, EE_OFF) };
+static const unsigned int eth_rxd1_pins[]	= { PIN(GPIOZ_5, EE_OFF) };
+static const unsigned int eth_rxd2_pins[]	= { PIN(GPIOZ_6, EE_OFF) };
+static const unsigned int eth_rxd3_pins[]	= { PIN(GPIOZ_7, EE_OFF) };
+static const unsigned int eth_rgmii_tx_clk_pins[] = { PIN(GPIOZ_8, EE_OFF) };
+static const unsigned int eth_tx_en_pins[]	= { PIN(GPIOZ_9, EE_OFF) };
+static const unsigned int eth_txd0_pins[]	= { PIN(GPIOZ_10, EE_OFF) };
+static const unsigned int eth_txd1_pins[]	= { PIN(GPIOZ_11, EE_OFF) };
+static const unsigned int eth_txd2_pins[]	= { PIN(GPIOZ_12, EE_OFF) };
+static const unsigned int eth_txd3_pins[]	= { PIN(GPIOZ_13, EE_OFF) };
+
+static const unsigned int uart_tx_ao_a_pins[]	= { PIN(GPIOAO_0, 0) };
+static const unsigned int uart_rx_ao_a_pins[]	= { PIN(GPIOAO_1, 0) };
+static const unsigned int uart_cts_ao_a_pins[]	= { PIN(GPIOAO_2, 0) };
+static const unsigned int uart_rts_ao_a_pins[]	= { PIN(GPIOAO_3, 0) };
+static const unsigned int uart_tx_ao_b_pins[]	= { PIN(GPIOAO_0, 0) };
+static const unsigned int uart_rx_ao_b_pins[]	= { PIN(GPIOAO_1, 0),
+						    PIN(GPIOAO_5, 0) };
+static const unsigned int uart_cts_ao_b_pins[]	= { PIN(GPIOAO_2, 0) };
+static const unsigned int uart_rts_ao_b_pins[]	= { PIN(GPIOAO_3, 0) };
+
+static const unsigned int i2c_sck_ao_pins[] = {PIN(GPIOAO_4, 0) };
+static const unsigned int i2c_sda_ao_pins[] = {PIN(GPIOAO_5, 0) };
+static const unsigned int i2c_slave_sck_ao_pins[] = {PIN(GPIOAO_4, 0) };
+static const unsigned int i2c_slave_sda_ao_pins[] = {PIN(GPIOAO_5, 0) };
+
+static struct meson_pmx_group meson_gxbb_periphs_groups[] = {
+	GPIO_GROUP(GPIOZ_0, EE_OFF),
+	GPIO_GROUP(GPIOZ_1, EE_OFF),
+	GPIO_GROUP(GPIOZ_2, EE_OFF),
+	GPIO_GROUP(GPIOZ_3, EE_OFF),
+	GPIO_GROUP(GPIOZ_4, EE_OFF),
+	GPIO_GROUP(GPIOZ_5, EE_OFF),
+	GPIO_GROUP(GPIOZ_6, EE_OFF),
+	GPIO_GROUP(GPIOZ_7, EE_OFF),
+	GPIO_GROUP(GPIOZ_8, EE_OFF),
+	GPIO_GROUP(GPIOZ_9, EE_OFF),
+	GPIO_GROUP(GPIOZ_10, EE_OFF),
+	GPIO_GROUP(GPIOZ_11, EE_OFF),
+	GPIO_GROUP(GPIOZ_12, EE_OFF),
+	GPIO_GROUP(GPIOZ_13, EE_OFF),
+	GPIO_GROUP(GPIOZ_14, EE_OFF),
+	GPIO_GROUP(GPIOZ_15, EE_OFF),
+
+	GPIO_GROUP(GPIOH_0, EE_OFF),
+	GPIO_GROUP(GPIOH_1, EE_OFF),
+	GPIO_GROUP(GPIOH_2, EE_OFF),
+	GPIO_GROUP(GPIOH_3, EE_OFF),
+
+	GPIO_GROUP(BOOT_0, EE_OFF),
+	GPIO_GROUP(BOOT_1, EE_OFF),
+	GPIO_GROUP(BOOT_2, EE_OFF),
+	GPIO_GROUP(BOOT_3, EE_OFF),
+	GPIO_GROUP(BOOT_4, EE_OFF),
+	GPIO_GROUP(BOOT_5, EE_OFF),
+	GPIO_GROUP(BOOT_6, EE_OFF),
+	GPIO_GROUP(BOOT_7, EE_OFF),
+	GPIO_GROUP(BOOT_8, EE_OFF),
+	GPIO_GROUP(BOOT_9, EE_OFF),
+	GPIO_GROUP(BOOT_10, EE_OFF),
+	GPIO_GROUP(BOOT_11, EE_OFF),
+	GPIO_GROUP(BOOT_12, EE_OFF),
+	GPIO_GROUP(BOOT_13, EE_OFF),
+	GPIO_GROUP(BOOT_14, EE_OFF),
+	GPIO_GROUP(BOOT_15, EE_OFF),
+	GPIO_GROUP(BOOT_16, EE_OFF),
+	GPIO_GROUP(BOOT_17, EE_OFF),
+
+	GPIO_GROUP(CARD_0, EE_OFF),
+	GPIO_GROUP(CARD_1, EE_OFF),
+	GPIO_GROUP(CARD_2, EE_OFF),
+	GPIO_GROUP(CARD_3, EE_OFF),
+	GPIO_GROUP(CARD_4, EE_OFF),
+	GPIO_GROUP(CARD_5, EE_OFF),
+	GPIO_GROUP(CARD_6, EE_OFF),
+
+	GPIO_GROUP(GPIODV_0, EE_OFF),
+	GPIO_GROUP(GPIODV_1, EE_OFF),
+	GPIO_GROUP(GPIODV_2, EE_OFF),
+	GPIO_GROUP(GPIODV_3, EE_OFF),
+	GPIO_GROUP(GPIODV_4, EE_OFF),
+	GPIO_GROUP(GPIODV_5, EE_OFF),
+	GPIO_GROUP(GPIODV_6, EE_OFF),
+	GPIO_GROUP(GPIODV_7, EE_OFF),
+	GPIO_GROUP(GPIODV_8, EE_OFF),
+	GPIO_GROUP(GPIODV_9, EE_OFF),
+	GPIO_GROUP(GPIODV_10, EE_OFF),
+	GPIO_GROUP(GPIODV_11, EE_OFF),
+	GPIO_GROUP(GPIODV_12, EE_OFF),
+	GPIO_GROUP(GPIODV_13, EE_OFF),
+	GPIO_GROUP(GPIODV_14, EE_OFF),
+	GPIO_GROUP(GPIODV_15, EE_OFF),
+	GPIO_GROUP(GPIODV_16, EE_OFF),
+	GPIO_GROUP(GPIODV_17, EE_OFF),
+	GPIO_GROUP(GPIODV_19, EE_OFF),
+	GPIO_GROUP(GPIODV_20, EE_OFF),
+	GPIO_GROUP(GPIODV_21, EE_OFF),
+	GPIO_GROUP(GPIODV_22, EE_OFF),
+	GPIO_GROUP(GPIODV_23, EE_OFF),
+	GPIO_GROUP(GPIODV_24, EE_OFF),
+	GPIO_GROUP(GPIODV_25, EE_OFF),
+	GPIO_GROUP(GPIODV_26, EE_OFF),
+	GPIO_GROUP(GPIODV_27, EE_OFF),
+	GPIO_GROUP(GPIODV_28, EE_OFF),
+	GPIO_GROUP(GPIODV_29, EE_OFF),
+
+	GPIO_GROUP(GPIOY_0, EE_OFF),
+	GPIO_GROUP(GPIOY_1, EE_OFF),
+	GPIO_GROUP(GPIOY_2, EE_OFF),
+	GPIO_GROUP(GPIOY_3, EE_OFF),
+	GPIO_GROUP(GPIOY_4, EE_OFF),
+	GPIO_GROUP(GPIOY_5, EE_OFF),
+	GPIO_GROUP(GPIOY_6, EE_OFF),
+	GPIO_GROUP(GPIOY_7, EE_OFF),
+	GPIO_GROUP(GPIOY_8, EE_OFF),
+	GPIO_GROUP(GPIOY_9, EE_OFF),
+	GPIO_GROUP(GPIOY_10, EE_OFF),
+	GPIO_GROUP(GPIOY_11, EE_OFF),
+	GPIO_GROUP(GPIOY_12, EE_OFF),
+	GPIO_GROUP(GPIOY_13, EE_OFF),
+	GPIO_GROUP(GPIOY_14, EE_OFF),
+	GPIO_GROUP(GPIOY_15, EE_OFF),
+	GPIO_GROUP(GPIOY_16, EE_OFF),
+
+	GPIO_GROUP(GPIOX_0, EE_OFF),
+	GPIO_GROUP(GPIOX_1, EE_OFF),
+	GPIO_GROUP(GPIOX_2, EE_OFF),
+	GPIO_GROUP(GPIOX_3, EE_OFF),
+	GPIO_GROUP(GPIOX_4, EE_OFF),
+	GPIO_GROUP(GPIOX_5, EE_OFF),
+	GPIO_GROUP(GPIOX_6, EE_OFF),
+	GPIO_GROUP(GPIOX_7, EE_OFF),
+	GPIO_GROUP(GPIOX_8, EE_OFF),
+	GPIO_GROUP(GPIOX_9, EE_OFF),
+	GPIO_GROUP(GPIOX_10, EE_OFF),
+	GPIO_GROUP(GPIOX_11, EE_OFF),
+	GPIO_GROUP(GPIOX_12, EE_OFF),
+	GPIO_GROUP(GPIOX_13, EE_OFF),
+	GPIO_GROUP(GPIOX_14, EE_OFF),
+	GPIO_GROUP(GPIOX_15, EE_OFF),
+	GPIO_GROUP(GPIOX_16, EE_OFF),
+	GPIO_GROUP(GPIOX_17, EE_OFF),
+	GPIO_GROUP(GPIOX_18, EE_OFF),
+	GPIO_GROUP(GPIOX_19, EE_OFF),
+	GPIO_GROUP(GPIOX_20, EE_OFF),
+	GPIO_GROUP(GPIOX_21, EE_OFF),
+	GPIO_GROUP(GPIOX_22, EE_OFF),
+
+	GPIO_GROUP(GPIOCLK_0, EE_OFF),
+	GPIO_GROUP(GPIOCLK_1, EE_OFF),
+	GPIO_GROUP(GPIOCLK_2, EE_OFF),
+	GPIO_GROUP(GPIOCLK_3, EE_OFF),
+
+	GPIO_GROUP(GPIO_TEST_N, EE_OFF),
+
+	/* Bank X */
+	GROUP(uart_tx_a,	4,	13),
+	GROUP(uart_rx_a,	4,	12),
+	GROUP(uart_cts_a,	4,	11),
+	GROUP(uart_rts_a,	4,	10),
+
+	/* Bank Y */
+	GROUP(uart_cts_c,	1,	19),
+	GROUP(uart_rts_c,	1,	18),
+	GROUP(uart_tx_c,	1,	17),
+	GROUP(uart_rx_c,	1,	16),
+
+	/* Bank Z */
+	GROUP(eth_mdio,		6,	1),
+	GROUP(eth_mdc,		6,	0),
+	GROUP(eth_clk_rx_clk,	6,	13),
+	GROUP(eth_rx_dv,	6,	12),
+	GROUP(eth_rxd0,		6,	11),
+	GROUP(eth_rxd1,		6,	10),
+	GROUP(eth_rxd2,		6,	9),
+	GROUP(eth_rxd3,		6,	8),
+	GROUP(eth_rgmii_tx_clk,	6,	7),
+	GROUP(eth_tx_en,	6,	6),
+	GROUP(eth_txd0,		6,	5),
+	GROUP(eth_txd1,		6,	4),
+	GROUP(eth_txd2,		6,	3),
+	GROUP(eth_txd3,		6,	2),
+
+	/* Bank DV */
+	GROUP(uart_tx_b,	2,	29),
+	GROUP(uart_rx_b,	2,	28),
+	GROUP(uart_cts_b,	2,	27),
+	GROUP(uart_rts_b,	2,	26),
+
+	/* Bank BOOT */
+	GROUP(emmc_nand_d07,	4,	30),
+	GROUP(emmc_clk,		4,	18),
+	GROUP(emmc_cmd,		4,	19),
+	GROUP(emmc_ds,		4,	31),
+
+	/* Bank CARD */
+	GROUP(sdcard_d1,	2,	14),
+	GROUP(sdcard_d0,	2,	15),
+	GROUP(sdcard_d3,	2,	12),
+	GROUP(sdcard_d2,	2,	13),
+	GROUP(sdcard_cmd,	2,	10),
+	GROUP(sdcard_clk,	2,	11),
+};
+
+static struct meson_pmx_group meson_gxbb_aobus_groups[] = {
+	GPIO_GROUP(GPIOAO_0, 0),
+	GPIO_GROUP(GPIOAO_1, 0),
+	GPIO_GROUP(GPIOAO_2, 0),
+	GPIO_GROUP(GPIOAO_3, 0),
+	GPIO_GROUP(GPIOAO_4, 0),
+	GPIO_GROUP(GPIOAO_5, 0),
+	GPIO_GROUP(GPIOAO_6, 0),
+	GPIO_GROUP(GPIOAO_7, 0),
+	GPIO_GROUP(GPIOAO_8, 0),
+	GPIO_GROUP(GPIOAO_9, 0),
+	GPIO_GROUP(GPIOAO_10, 0),
+	GPIO_GROUP(GPIOAO_11, 0),
+	GPIO_GROUP(GPIOAO_12, 0),
+	GPIO_GROUP(GPIOAO_13, 0),
+
+	/* bank AO */
+	GROUP(uart_tx_ao_b,	0,	26),
+	GROUP(uart_rx_ao_b,	0,	25),
+	GROUP(uart_tx_ao_a,	0,	12),
+	GROUP(uart_rx_ao_a,	0,	11),
+	GROUP(uart_cts_ao_a,	0,	10),
+	GROUP(uart_rts_ao_a,	0,	9),
+	GROUP(uart_cts_ao_b,	0,	8),
+	GROUP(uart_rts_ao_b,	0,	7),
+	GROUP(i2c_sck_ao,	0,	6),
+	GROUP(i2c_sda_ao,	0,	5),
+	GROUP(i2c_slave_sck_ao, 0,	2),
+	GROUP(i2c_slave_sda_ao, 0,	1),
+};
+
+static const char * const gpio_periphs_groups[] = {
+	"GPIOZ_0", "GPIOZ_1", "GPIOZ_2", "GPIOZ_3", "GPIOZ_4",
+	"GPIOZ_5", "GPIOZ_6", "GPIOZ_7", "GPIOZ_8", "GPIOZ_9",
+	"GPIOZ_10", "GPIOZ_11", "GPIOZ_12", "GPIOZ_13", "GPIOZ_14",
+	"GPIOZ_15",
+
+	"GPIOH_0", "GPIOH_1", "GPIOH_2", "GPIOH_3",
+
+	"BOOT_0", "BOOT_1", "BOOT_2", "BOOT_3", "BOOT_4",
+	"BOOT_5", "BOOT_6", "BOOT_7", "BOOT_8", "BOOT_9",
+	"BOOT_10", "BOOT_11", "BOOT_12", "BOOT_13", "BOOT_14",
+	"BOOT_15", "BOOT_16", "BOOT_17",
+
+	"CARD_0", "CARD_1", "CARD_2", "CARD_3", "CARD_4",
+	"CARD_5", "CARD_6",
+
+	"GPIODV_0", "GPIODV_1", "GPIODV_2", "GPIODV_3", "GPIODV_4",
+	"GPIODV_5", "GPIODV_6", "GPIODV_7", "GPIODV_8", "GPIODV_9",
+	"GPIODV_10", "GPIODV_11", "GPIODV_12", "GPIODV_13", "GPIODV_14",
+	"GPIODV_15", "GPIODV_16", "GPIODV_17", "GPIODV_18", "GPIODV_19",
+	"GPIODV_20", "GPIODV_21", "GPIODV_22", "GPIODV_23", "GPIODV_24",
+	"GPIODV_25", "GPIODV_26", "GPIODV_27", "GPIODV_28", "GPIODV_29",
+
+	"GPIOY_0", "GPIOY_1", "GPIOY_2", "GPIOY_3", "GPIOY_4",
+	"GPIOY_5", "GPIOY_6", "GPIOY_7", "GPIOY_8", "GPIOY_9",
+	"GPIOY_10", "GPIOY_11", "GPIOY_12", "GPIOY_13", "GPIOY_14",
+	"GPIOY_15", "GPIOY_16",
+
+	"GPIOX_0", "GPIOX_1", "GPIOX_2", "GPIOX_3", "GPIOX_4",
+	"GPIOX_5", "GPIOX_6", "GPIOX_7", "GPIOX_8", "GPIOX_9",
+	"GPIOX_10", "GPIOX_11", "GPIOX_12", "GPIOX_13", "GPIOX_14",
+	"GPIOX_15", "GPIOX_16", "GPIOX_17", "GPIOX_18", "GPIOX_19",
+	"GPIOX_20", "GPIOX_21", "GPIOX_22",
+
+	"GPIO_TEST_N",
+};
+
+static const char * const emmc_groups[] = {
+	"emmc_nand_d07", "emmc_clk", "emmc_cmd", "emmc_ds",
+};
+
+static const char * const sdcard_groups[] = {
+	"sdcard_d0", "sdcard_d1", "sdcard_d2", "sdcard_d3",
+	"sdcard_cmd", "sdcard_clk",
+};
+
+static const char * const uart_a_groups[] = {
+	"uart_tx_a", "uart_rx_a", "uart_cts_a", "uart_rts_a",
+};
+
+static const char * const uart_b_groups[] = {
+	"uart_tx_b", "uart_rx_b", "uart_cts_b", "uart_rts_b",
+};
+
+static const char * const uart_c_groups[] = {
+	"uart_tx_c", "uart_rx_c", "uart_cts_c", "uart_rts_c",
+};
+
+static const char * const eth_groups[] = {
+	"eth_mdio", "eth_mdc", "eth_clk_rx_clk", "eth_rx_dv",
+	"eth_rxd0", "eth_rxd1", "eth_rxd2", "eth_rxd3",
+	"eth_rgmii_tx_clk", "eth_tx_en",
+	"eth_txd0", "eth_txd1", "eth_txd2", "eth_txd3",
+};
+
+static const char * const gpio_aobus_groups[] = {
+	"GPIOAO_0", "GPIOAO_1", "GPIOAO_2", "GPIOAO_3", "GPIOAO_4",
+	"GPIOAO_5", "GPIOAO_6", "GPIOAO_7", "GPIOAO_8", "GPIOAO_9",
+	"GPIOAO_10", "GPIOAO_11", "GPIOAO_12", "GPIOAO_13",
+};
+
+static const char * const uart_ao_groups[] = {
+	"uart_tx_ao_a", "uart_rx_ao_a", "uart_cts_ao_a", "uart_rts_ao_a",
+};
+
+static const char * const uart_ao_b_groups[] = {
+	"uart_tx_ao_b", "uart_rx_ao_b", "uart_cts_ao_b", "uart_rts_ao_b",
+};
+
+static const char * const i2c_ao_groups[] = {
+	"i2c_sdk_ao", "i2c_sda_ao",
+};
+
+static const char * const i2c_slave_ao_groups[] = {
+	"i2c_slave_sdk_ao", "i2c_slave_sda_ao",
+};
+
+static struct meson_pmx_func meson_gxbb_periphs_functions[] = {
+	FUNCTION(gpio_periphs),
+	FUNCTION(emmc),
+	FUNCTION(sdcard),
+	FUNCTION(uart_a),
+	FUNCTION(uart_b),
+	FUNCTION(uart_c),
+	FUNCTION(eth),
+};
+
+static struct meson_pmx_func meson_gxbb_aobus_functions[] = {
+	FUNCTION(gpio_aobus),
+	FUNCTION(uart_ao),
+	FUNCTION(uart_ao_b),
+	FUNCTION(i2c_ao),
+	FUNCTION(i2c_slave_ao),
+};
+
+struct meson_pinctrl_data meson_gxbb_periphs_pinctrl_data = {
+	.name		= "periphs-banks",
+	.pin_base	= 14,
+	.groups		= meson_gxbb_periphs_groups,
+	.funcs		= meson_gxbb_periphs_functions,
+	.num_pins	= 120,
+	.num_groups	= ARRAY_SIZE(meson_gxbb_periphs_groups),
+	.num_funcs	= ARRAY_SIZE(meson_gxbb_periphs_functions),
+};
+
+struct meson_pinctrl_data meson_gxbb_aobus_pinctrl_data = {
+	.name		= "aobus-banks",
+	.pin_base	= 0,
+	.groups		= meson_gxbb_aobus_groups,
+	.funcs		= meson_gxbb_aobus_functions,
+	.num_pins	= 14,
+	.num_groups	= ARRAY_SIZE(meson_gxbb_aobus_groups),
+	.num_funcs	= ARRAY_SIZE(meson_gxbb_aobus_functions),
+};
+
+static const struct udevice_id meson_gxbb_pinctrl_match[] = {
+	{
+		.compatible = "amlogic,meson-gxbb-periphs-pinctrl",
+		.data = (ulong)&meson_gxbb_periphs_pinctrl_data,
+	},
+	{
+		.compatible = "amlogic,meson-gxbb-aobus-pinctrl",
+		.data = (ulong)&meson_gxbb_aobus_pinctrl_data,
+	},
+	{ /* sentinel */ }
+};
+
+U_BOOT_DRIVER(meson_gxbb_pinctrl) = {
+	.name = "meson-gxbb-pinctrl",
+	.id = UCLASS_PINCTRL,
+	.of_match = of_match_ptr(meson_gxbb_pinctrl_match),
+	.probe = meson_pinctrl_probe,
+	.priv_auto_alloc_size = sizeof(struct meson_pinctrl),
+	.ops = &meson_pinctrl_ops,
+};
diff --git a/drivers/pinctrl/meson/pinctrl-meson.c b/drivers/pinctrl/meson/pinctrl-meson.c
new file mode 100644
index 00000000000..d21a3dd7552
--- /dev/null
+++ b/drivers/pinctrl/meson/pinctrl-meson.c
@@ -0,0 +1,179 @@
+/*
+ * (C) Copyright 2016 - Beniamino Galvani <b.galvani@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm/device.h>
+#include <dm/pinctrl.h>
+#include <fdt_support.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/sizes.h>
+
+#include "pinctrl-meson.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const char *meson_pinctrl_dummy_name = "_dummy";
+
+static int meson_pinctrl_get_groups_count(struct udevice *dev)
+{
+	struct meson_pinctrl *priv = dev_get_priv(dev);
+
+	return priv->data->num_groups;
+}
+
+static const char *meson_pinctrl_get_group_name(struct udevice *dev,
+						unsigned selector)
+{
+	struct meson_pinctrl *priv = dev_get_priv(dev);
+
+	if (!priv->data->groups[selector].name)
+		return meson_pinctrl_dummy_name;
+
+	return priv->data->groups[selector].name;
+}
+
+static int meson_pinmux_get_functions_count(struct udevice *dev)
+{
+	struct meson_pinctrl *priv = dev_get_priv(dev);
+
+	return priv->data->num_funcs;
+}
+
+static const char *meson_pinmux_get_function_name(struct udevice *dev,
+						  unsigned selector)
+{
+	struct meson_pinctrl *priv = dev_get_priv(dev);
+
+	return priv->data->funcs[selector].name;
+}
+
+static void meson_pinmux_disable_other_groups(struct meson_pinctrl *priv,
+					      unsigned int pin, int sel_group)
+{
+	struct meson_pmx_group *group;
+	void __iomem *addr;
+	int i, j;
+
+	for (i = 0; i < priv->data->num_groups; i++) {
+		group = &priv->data->groups[i];
+		if (group->is_gpio || i == sel_group)
+			continue;
+
+		for (j = 0; j < group->num_pins; j++) {
+			if (group->pins[j] == pin) {
+				/* We have found a group using the pin */
+				debug("pinmux: disabling %s\n", group->name);
+				addr = priv->reg_mux + group->reg * 4;
+				writel(readl(addr) & ~BIT(group->bit), addr);
+			}
+		}
+	}
+}
+
+static int meson_pinmux_group_set(struct udevice *dev,
+				  unsigned group_selector,
+				  unsigned func_selector)
+{
+	struct meson_pinctrl *priv = dev_get_priv(dev);
+	const struct meson_pmx_group *group;
+	const struct meson_pmx_func *func;
+	void __iomem *addr;
+	int i;
+
+	group = &priv->data->groups[group_selector];
+	func = &priv->data->funcs[func_selector];
+
+	debug("pinmux: set group %s func %s\n", group->name, func->name);
+
+	/*
+	 * Disable groups using the same pins.
+	 * The selected group is not disabled to avoid glitches.
+	 */
+	for (i = 0; i < group->num_pins; i++) {
+		meson_pinmux_disable_other_groups(priv,
+						  group->pins[i],
+						  group_selector);
+	}
+
+	/* Function 0 (GPIO) doesn't need any additional setting */
+	if (func_selector) {
+		addr = priv->reg_mux + group->reg * 4;
+		writel(readl(addr) | BIT(group->bit), addr);
+	}
+
+	return 0;
+}
+
+const struct pinctrl_ops meson_pinctrl_ops = {
+	.get_groups_count = meson_pinctrl_get_groups_count,
+	.get_group_name = meson_pinctrl_get_group_name,
+	.get_functions_count = meson_pinmux_get_functions_count,
+	.get_function_name = meson_pinmux_get_function_name,
+	.pinmux_group_set = meson_pinmux_group_set,
+	.set_state = pinctrl_generic_set_state,
+};
+
+static fdt_addr_t parse_address(int offset, const char *name, int na, int ns)
+{
+	int index, len = 0;
+	const fdt32_t *reg;
+
+	index = fdt_find_string(gd->fdt_blob, offset, "reg-names", name);
+	if (index < 0)
+		return FDT_ADDR_T_NONE;
+
+	reg = fdt_getprop(gd->fdt_blob, offset, "reg", &len);
+	if (!reg || (len <= (index * sizeof(fdt32_t) * (na + ns))))
+		return FDT_ADDR_T_NONE;
+
+	reg += index * (na + ns);
+
+	return fdt_translate_address((void *)gd->fdt_blob, offset, reg);
+}
+
+int meson_pinctrl_probe(struct udevice *dev)
+{
+	struct meson_pinctrl *priv = dev_get_priv(dev);
+	fdt_addr_t addr;
+	int node, gpio = -1, len;
+	int na, ns;
+
+	na = fdt_address_cells(gd->fdt_blob, dev->parent->of_offset);
+	if (na < 1) {
+		debug("bad #address-cells\n");
+		return -EINVAL;
+	}
+
+	ns = fdt_size_cells(gd->fdt_blob, dev->parent->of_offset);
+	if (ns < 1) {
+		debug("bad #size-cells\n");
+		return -EINVAL;
+	}
+
+	fdt_for_each_subnode(gd->fdt_blob, node, dev->of_offset) {
+		if (fdt_getprop(gd->fdt_blob, node, "gpio-controller", &len)) {
+			gpio = node;
+			break;
+		}
+	}
+
+	if (!gpio) {
+		debug("gpio node not found\n");
+		return -EINVAL;
+	}
+
+	addr = parse_address(gpio, "mux", na, ns);
+	if (addr == FDT_ADDR_T_NONE) {
+		debug("mux not found\n");
+		return -EINVAL;
+	}
+
+	priv->reg_mux = (void __iomem *)addr;
+	priv->data = (struct meson_pinctrl_data *)dev_get_driver_data(dev);
+
+	return 0;
+}
diff --git a/drivers/pinctrl/meson/pinctrl-meson.h b/drivers/pinctrl/meson/pinctrl-meson.h
new file mode 100644
index 00000000000..4127a60f48e
--- /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__ */