pinctrl: sunxi: Add support for the secondary A523 GPIO ports

As most other Allwinner SoCs before, the A523 chip contains a second
GPIO controller, managing banks PL and PM.
Use the newly introduced DT based pinctrl driver to describe just the
generic pinctrl properties, so advertise the number of pins per bank
and the interrupt capabilities. The actual function/mux assignment is
taken from the devicetree.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/20250306235827.4895-9-andre.przywara@arm.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/sunxi/Kconfig b/drivers/pinctrl/sunxi/Kconfig
index 0cbe466683650d0168f48b11df832408315c0b47..dc62eba96348ec8ecb94c4e84e21a0bdd9d211e7 100644 (file)
--- a/drivers/pinctrl/sunxi/Kconfig
+++ b/drivers/pinctrl/sunxi/Kconfig
@@ -136,4 +136,9 @@ config PINCTRL_SUN55I_A523
        default ARM64 && ARCH_SUNXI
        select PINCTRL_SUNXI
 
+config PINCTRL_SUN55I_A523_R
+       bool "Support for the Allwinner A523 R-PIO"
+       default ARM64 && ARCH_SUNXI
+       select PINCTRL_SUNXI
+
 endif

diff --git a/drivers/pinctrl/sunxi/Makefile b/drivers/pinctrl/sunxi/Makefile
index 4e55508ff7f7658fbfae5e84e0c0cf78791b3dcd..951b3f1e4b4f1c666848834d51a79f8d3cf32d0f 100644 (file)
--- a/drivers/pinctrl/sunxi/Makefile
+++ b/drivers/pinctrl/sunxi/Makefile
@@ -28,5 +28,6 @@ obj-$(CONFIG_PINCTRL_SUN50I_H6_R)     += pinctrl-sun50i-h6-r.o
 obj-$(CONFIG_PINCTRL_SUN50I_H616)      += pinctrl-sun50i-h616.o
 obj-$(CONFIG_PINCTRL_SUN50I_H616_R)    += pinctrl-sun50i-h616-r.o
 obj-$(CONFIG_PINCTRL_SUN55I_A523)      += pinctrl-sun55i-a523.o
+obj-$(CONFIG_PINCTRL_SUN55I_A523_R)    += pinctrl-sun55i-a523-r.o
 obj-$(CONFIG_PINCTRL_SUN9I_A80)                += pinctrl-sun9i-a80.o
 obj-$(CONFIG_PINCTRL_SUN9I_A80_R)      += pinctrl-sun9i-a80-r.o

diff --git a/drivers/pinctrl/sunxi/pinctrl-sun55i-a523-r.c b/drivers/pinctrl/sunxi/pinctrl-sun55i-a523-r.c
new file mode 100644 (file)
index 0000000..69cd2b4
--- /dev/null
+++ b/drivers/pinctrl/sunxi/pinctrl-sun55i-a523-r.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Allwinner A523 SoC r-pinctrl driver.
+ *
+ * Copyright (C) 2024 Arm Ltd.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pinctrl/pinctrl.h>
+
+#include "pinctrl-sunxi.h"
+
+static const u8 a523_r_nr_bank_pins[SUNXI_PINCTRL_MAX_BANKS] =
+/*       PL  PM */
+       { 14,  6 };
+
+static const unsigned int a523_r_irq_bank_map[] = { 0, 1 };
+
+static const u8 a523_r_irq_bank_muxes[SUNXI_PINCTRL_MAX_BANKS] =
+/*       PL  PM */
+       { 14, 14 };
+
+static struct sunxi_pinctrl_desc a523_r_pinctrl_data = {
+       .irq_banks = ARRAY_SIZE(a523_r_irq_bank_map),
+       .irq_bank_map = a523_r_irq_bank_map,
+       .irq_read_needs_mux = true,
+       .io_bias_cfg_variant = BIAS_VOLTAGE_PIO_POW_MODE_SEL,
+       .pin_base = PL_BASE,
+};
+
+static int a523_r_pinctrl_probe(struct platform_device *pdev)
+{
+       return sunxi_pinctrl_dt_table_init(pdev, a523_r_nr_bank_pins,
+                                          a523_r_irq_bank_muxes,
+                                          &a523_r_pinctrl_data,
+                                          SUNXI_PINCTRL_NEW_REG_LAYOUT);
+}
+
+static const struct of_device_id a523_r_pinctrl_match[] = {
+       { .compatible = "allwinner,sun55i-a523-r-pinctrl", },
+       {}
+};
+
+static struct platform_driver a523_r_pinctrl_driver = {
+       .probe  = a523_r_pinctrl_probe,
+       .driver = {
+               .name           = "sun55i-a523-r-pinctrl",
+               .of_match_table = a523_r_pinctrl_match,
+       },
+};
+builtin_platform_driver(a523_r_pinctrl_driver);