pinctrl: starfive: Add StarFive JH7110 aon controller driver

Add pinctrl driver for StarFive JH7110 SoC aon pinctrl controller.

Co-developed-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Jianlong Huang <jianlong.huang@starfivetech.com>
Signed-off-by: Hal Feng <hal.feng@starfivetech.com>
Link: https://lore.kernel.org/r/20230209143702.44408-5-hal.feng@starfivetech.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/starfive/Kconfig b/drivers/pinctrl/starfive/Kconfig
index 453c8a0..8192ac2 100644 (file)
--- a/drivers/pinctrl/starfive/Kconfig
+++ b/drivers/pinctrl/starfive/Kconfig
@@ -37,3 +37,15 @@ config PINCTRL_STARFIVE_JH7110_SYS
          This also provides an interface to the GPIO pins not used by other
          peripherals supporting inputs, outputs, configuring pull-up/pull-down
          and interrupts on input changes.
+
+config PINCTRL_STARFIVE_JH7110_AON
+       tristate "Always-on pinctrl and GPIO driver for the StarFive JH7110 SoC"
+       depends on SOC_STARFIVE  || COMPILE_TEST
+       depends on OF
+       select PINCTRL_STARFIVE_JH7110
+       default SOC_STARFIVE
+       help
+         Say yes here to support always-on pin control on the StarFive JH7110 SoC.
+         This also provides an interface to the GPIO pins not used by other
+         peripherals supporting inputs, outputs, configuring pull-up/pull-down
+         and interrupts on input changes.

diff --git a/drivers/pinctrl/starfive/Makefile b/drivers/pinctrl/starfive/Makefile
index dc2d1e3..ee0d32d 100644 (file)
--- a/drivers/pinctrl/starfive/Makefile
+++ b/drivers/pinctrl/starfive/Makefile
@@ -4,3 +4,4 @@ obj-$(CONFIG_PINCTRL_STARFIVE_JH7100)   += pinctrl-starfive-jh7100.o
 
 obj-$(CONFIG_PINCTRL_STARFIVE_JH7110)          += pinctrl-starfive-jh7110.o
 obj-$(CONFIG_PINCTRL_STARFIVE_JH7110_SYS)      += pinctrl-starfive-jh7110-sys.o
+obj-$(CONFIG_PINCTRL_STARFIVE_JH7110_AON)      += pinctrl-starfive-jh7110-aon.o

diff --git a/drivers/pinctrl/starfive/pinctrl-starfive-jh7110-aon.c b/drivers/pinctrl/starfive/pinctrl-starfive-jh7110-aon.c
new file mode 100644 (file)
index 0000000..8cf28aa
--- /dev/null
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jh7110-aon.c
@@ -0,0 +1,177 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Pinctrl / GPIO driver for StarFive JH7110 SoC aon controller
+ *
+ * Copyright (C) 2022 StarFive Technology Co., Ltd.
+ */
+
+#include <linux/err.h>
+#include <linux/gpio/driver.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/pinctrl/starfive,jh7110-pinctrl.h>
+
+#include "../core.h"
+#include "../pinconf.h"
+#include "../pinmux.h"
+#include "pinctrl-starfive-jh7110.h"
+
+#define JH7110_AON_NGPIO               4
+#define JH7110_AON_GC_BASE             64
+
+/* registers */
+#define JH7110_AON_DOEN                        0x0
+#define JH7110_AON_DOUT                        0x4
+#define JH7110_AON_GPI                 0x8
+#define JH7110_AON_GPIOIN              0x2c
+
+#define JH7110_AON_GPIOEN              0xc
+#define JH7110_AON_GPIOIS              0x10
+#define JH7110_AON_GPIOIC              0x14
+#define JH7110_AON_GPIOIBE             0x18
+#define JH7110_AON_GPIOIEV             0x1c
+#define JH7110_AON_GPIOIE              0x20
+#define JH7110_AON_GPIORIS             0x28
+#define JH7110_AON_GPIOMIS             0x28
+
+#define JH7110_AON_GPO_PDA_0_5_CFG     0x30
+
+static const struct pinctrl_pin_desc jh7110_aon_pins[] = {
+       PINCTRL_PIN(PAD_TESTEN,         "TESTEN"),
+       PINCTRL_PIN(PAD_RGPIO0,         "RGPIO0"),
+       PINCTRL_PIN(PAD_RGPIO1,         "RGPIO1"),
+       PINCTRL_PIN(PAD_RGPIO2,         "RGPIO2"),
+       PINCTRL_PIN(PAD_RGPIO3,         "RGPIO3"),
+       PINCTRL_PIN(PAD_RSTN,           "RSTN"),
+       PINCTRL_PIN(PAD_GMAC0_MDC,      "GMAC0_MDC"),
+       PINCTRL_PIN(PAD_GMAC0_MDIO,     "GMAC0_MDIO"),
+       PINCTRL_PIN(PAD_GMAC0_RXD0,     "GMAC0_RXD0"),
+       PINCTRL_PIN(PAD_GMAC0_RXD1,     "GMAC0_RXD1"),
+       PINCTRL_PIN(PAD_GMAC0_RXD2,     "GMAC0_RXD2"),
+       PINCTRL_PIN(PAD_GMAC0_RXD3,     "GMAC0_RXD3"),
+       PINCTRL_PIN(PAD_GMAC0_RXDV,     "GMAC0_RXDV"),
+       PINCTRL_PIN(PAD_GMAC0_RXC,      "GMAC0_RXC"),
+       PINCTRL_PIN(PAD_GMAC0_TXD0,     "GMAC0_TXD0"),
+       PINCTRL_PIN(PAD_GMAC0_TXD1,     "GMAC0_TXD1"),
+       PINCTRL_PIN(PAD_GMAC0_TXD2,     "GMAC0_TXD2"),
+       PINCTRL_PIN(PAD_GMAC0_TXD3,     "GMAC0_TXD3"),
+       PINCTRL_PIN(PAD_GMAC0_TXEN,     "GMAC0_TXEN"),
+       PINCTRL_PIN(PAD_GMAC0_TXC,      "GMAC0_TXC"),
+};
+
+static int jh7110_aon_set_one_pin_mux(struct jh7110_pinctrl *sfp,
+                                     unsigned int pin,
+                                     unsigned int din, u32 dout,
+                                     u32 doen, u32 func)
+{
+       if (pin < sfp->gc.ngpio && func == 0)
+               jh7110_set_gpiomux(sfp, pin, din, dout, doen);
+
+       return 0;
+}
+
+static int jh7110_aon_get_padcfg_base(struct jh7110_pinctrl *sfp,
+                                     unsigned int pin)
+{
+       if (pin < PAD_GMAC0_MDC)
+               return JH7110_AON_GPO_PDA_0_5_CFG;
+
+       return -1;
+}
+
+static void jh7110_aon_irq_handler(struct irq_desc *desc)
+{
+       struct jh7110_pinctrl *sfp = jh7110_from_irq_desc(desc);
+       struct irq_chip *chip = irq_desc_get_chip(desc);
+       unsigned long mis;
+       unsigned int pin;
+
+       chained_irq_enter(chip, desc);
+
+       mis = readl_relaxed(sfp->base + JH7110_AON_GPIOMIS);
+       for_each_set_bit(pin, &mis, JH7110_AON_NGPIO)
+               generic_handle_domain_irq(sfp->gc.irq.domain, pin);
+
+       chained_irq_exit(chip, desc);
+}
+
+static int jh7110_aon_init_hw(struct gpio_chip *gc)
+{
+       struct jh7110_pinctrl *sfp = container_of(gc,
+                       struct jh7110_pinctrl, gc);
+
+       /* mask all GPIO interrupts */
+       writel_relaxed(0, sfp->base + JH7110_AON_GPIOIE);
+       /* clear edge interrupt flags */
+       writel_relaxed(0, sfp->base + JH7110_AON_GPIOIC);
+       writel_relaxed(0x0f, sfp->base + JH7110_AON_GPIOIC);
+       /* enable GPIO interrupts */
+       writel_relaxed(1, sfp->base + JH7110_AON_GPIOEN);
+       return 0;
+}
+
+static const struct jh7110_gpio_irq_reg jh7110_aon_irq_reg = {
+       .is_reg_base    = JH7110_AON_GPIOIS,
+       .ic_reg_base    = JH7110_AON_GPIOIC,
+       .ibe_reg_base   = JH7110_AON_GPIOIBE,
+       .iev_reg_base   = JH7110_AON_GPIOIEV,
+       .ie_reg_base    = JH7110_AON_GPIOIE,
+       .ris_reg_base   = JH7110_AON_GPIORIS,
+       .mis_reg_base   = JH7110_AON_GPIOMIS,
+};
+
+static const struct jh7110_pinctrl_soc_info jh7110_aon_pinctrl_info = {
+       .pins           = jh7110_aon_pins,
+       .npins          = ARRAY_SIZE(jh7110_aon_pins),
+       .ngpios         = JH7110_AON_NGPIO,
+       .gc_base        = JH7110_AON_GC_BASE,
+       .dout_reg_base  = JH7110_AON_DOUT,
+       .dout_mask      = GENMASK(3, 0),
+       .doen_reg_base  = JH7110_AON_DOEN,
+       .doen_mask      = GENMASK(2, 0),
+       .gpi_reg_base   = JH7110_AON_GPI,
+       .gpi_mask       = GENMASK(3, 0),
+       .gpioin_reg_base           = JH7110_AON_GPIOIN,
+       .irq_reg                   = &jh7110_aon_irq_reg,
+       .jh7110_set_one_pin_mux  = jh7110_aon_set_one_pin_mux,
+       .jh7110_get_padcfg_base  = jh7110_aon_get_padcfg_base,
+       .jh7110_gpio_irq_handler = jh7110_aon_irq_handler,
+       .jh7110_gpio_init_hw     = jh7110_aon_init_hw,
+};
+
+static const struct of_device_id jh7110_aon_pinctrl_of_match[] = {
+       {
+               .compatible = "starfive,jh7110-aon-pinctrl",
+               .data = &jh7110_aon_pinctrl_info,
+       },
+       { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, jh7110_aon_pinctrl_of_match);
+
+static struct platform_driver jh7110_aon_pinctrl_driver = {
+       .probe = jh7110_pinctrl_probe,
+       .driver = {
+               .name = "starfive-jh7110-aon-pinctrl",
+               .of_match_table = jh7110_aon_pinctrl_of_match,
+       },
+};
+module_platform_driver(jh7110_aon_pinctrl_driver);
+
+MODULE_DESCRIPTION("Pinctrl driver for the StarFive JH7110 SoC aon controller");
+MODULE_AUTHOR("Jianlong Huang <jianlong.huang@starfivetech.com>");
+MODULE_LICENSE("GPL");