[RFC PATCH v3 5/7] pinctrl: starfive: jh8100: add AON domain sub-driver

Alex Soo
2024-05-03T11:15:10Z

Add AON domain sub-driver.

Signed-off-by: Alex Soo <yuklin.soo@starfivetech.com>
---
MAINTAINERS | 7 +
drivers/pinctrl/starfive/Kconfig | 14 ++
drivers/pinctrl/starfive/Makefile | 1 +
.../starfive/pinctrl-starfive-jh8100-aon.c | 150 ++++++++++++++++++
.../starfive/pinctrl-starfive-jh8100.c | 3 +
.../starfive/pinctrl-starfive-jh8100.h | 5 +
6 files changed, 180 insertions(+)
create mode 100644 drivers/pinctrl/starfive/pinctrl-starfive-jh8100-aon.c

diff --git a/MAINTAINERS b/MAINTAINERS
index dbd104f1f267..3f6b17688ac8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -21125,6 +21125,13 @@ S: Maintained
F: drivers/reset/starfive/reset-starfive-jh81*
F: include/dt-bindings/reset/starfive?jh81*.h

+STARFIVE JH8100 PINCTRL DRIVERS
+M: Alex Soo <yuklin.soo@starfivetech.com>
+S: Supported
+F: Documentation/devicetree/bindings/pinctrl/starfive,jh81*.yaml
+F: drivers/pinctrl/starfive/pinctrl-starfive-jh81*
+F: include/dt-bindings/pinctrl/starfive,jh8100-pinctrl.h
+
STATIC BRANCH/CALL
M: Peter Zijlstra <peterz@infradead.org>
M: Josh Poimboeuf <jpoimboe@kernel.org>
diff --git a/drivers/pinctrl/starfive/Kconfig b/drivers/pinctrl/starfive/Kconfig
index bc123c0bf35e..6c448837f5f6 100644
--- a/drivers/pinctrl/starfive/Kconfig
+++ b/drivers/pinctrl/starfive/Kconfig
@@ -94,3 +94,17 @@ config PINCTRL_STARFIVE_JH8100_SYS_GMAC
This provides syscon registers to indicate voltage level on SDIO1/GMAC1, to indicate
GMAC1 pads voltage level under different GMAC interface modes, and to configure
GMAC1 interface slew rate.
+
+config PINCTRL_STARFIVE_JH8100_AON
+ tristate "Always-on pinctrl and GPIO driver for the StarFive JH8100 SoC"
+ depends on ARCH_STARFIVE || COMPILE_TEST
+ depends on OF
+ select PINCTRL_STARFIVE_JH8100
+ default ARCH_STARFIVE
+ help
+ Say yes here to support always-on pin control on the StarFive JH8100 SoC.
+ This provides an interface to the RGPIO pins not used by other peripherals
+ supporting inputs, outputs, configuring pull-up/pull-down and interrupts
+ on input changes. And also, the syscon registers to indicate voltage level
+ on eMMC/SDIO0/XSPI/RGPIOs/GMAC0, to indicate GMAC0 pads voltage level under
+ different GMAC interface modes, and to configure GMAC0 interface slew rate.
diff --git a/drivers/pinctrl/starfive/Makefile b/drivers/pinctrl/starfive/Makefile
index 236a693a8aef..46b1ab97779b 100644
--- a/drivers/pinctrl/starfive/Makefile
+++ b/drivers/pinctrl/starfive/Makefile
@@ -10,3 +10,4 @@ obj-$(CONFIG_PINCTRL_STARFIVE_JH8100) += pinctrl-starfive-jh8100.o
obj-$(CONFIG_PINCTRL_STARFIVE_JH8100_SYS_EAST) += pinctrl-starfive-jh8100-sys-east.o
obj-$(CONFIG_PINCTRL_STARFIVE_JH8100_SYS_WEST) += pinctrl-starfive-jh8100-sys-west.o
obj-$(CONFIG_PINCTRL_STARFIVE_JH8100_SYS_GMAC) += pinctrl-starfive-jh8100-sys-gmac.o
+obj-$(CONFIG_PINCTRL_STARFIVE_JH8100_AON) += pinctrl-starfive-jh8100-aon.o
diff --git a/drivers/pinctrl/starfive/pinctrl-starfive-jh8100-aon.c b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100-aon.c
new file mode 100644
index 000000000000..3ced9f94f47a
--- /dev/null
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100-aon.c
@@ -0,0 +1,150 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Pinctrl / GPIO driver for StarFive JH8100 SoC aon controller
+ *
+ * Copyright (C) 2023-2024 StarFive Technology Co., Ltd.
+ * Author: Alex Soo <yuklin.soo@starfivetech.com>
+ *
+ */
+
+#include <linux/gpio/driver.h>
+#include <linux/module.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <dt-bindings/pinctrl/starfive,jh8100-pinctrl.h>
+
+#include "pinctrl-starfive-jh8100.h"
+
+#define JH8100_AON_GC_BASE 64
+
+/* registers */
+#define JH8100_AON_DOEN 0x00
+#define JH8100_AON_DOUT 0x10
+#define JH8100_AON_GPI 0x20
+#define JH8100_AON_GPIOIN 0x54
+
+#define JH8100_AON_GPIOEN 0x34
+#define JH8100_AON_GPIOIS 0x38
+#define JH8100_AON_GPIOIC 0x3c
+#define JH8100_AON_GPIOIBE 0x40
+#define JH8100_AON_GPIOIEV 0x44
+#define JH8100_AON_GPIOIE 0x48
+#define JH8100_AON_GPIORIS 0x4c
+#define JH8100_AON_GPIOMIS 0x50
+
+static const struct pinctrl_pin_desc jh8100_aon_pins[] = {
+ PINCTRL_PIN(0, "AON_RGPIO0"),
+ PINCTRL_PIN(1, "AON_RGPIO1"),
+ PINCTRL_PIN(2, "AON_RGPIO2"),
+ PINCTRL_PIN(3, "AON_RGPIO3"),
+ PINCTRL_PIN(4, "AON_RGPIO4"),
+ PINCTRL_PIN(5, "AON_RGPIO5"),
+ PINCTRL_PIN(6, "AON_RGPIO6"),
+ PINCTRL_PIN(7, "AON_RGPIO7"),
+ PINCTRL_PIN(8, "AON_RGPIO8"),
+ PINCTRL_PIN(9, "AON_RGPIO9"),
+ PINCTRL_PIN(10, "AON_RGPIO10"),
+ PINCTRL_PIN(11, "AON_RGPIO11"),
+ PINCTRL_PIN(12, "AON_RGPIO12"),
+ PINCTRL_PIN(13, "AON_RGPIO13"),
+ PINCTRL_PIN(14, "AON_RGPIO14"),
+ PINCTRL_PIN(15, "AON_RGPIO15"),
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int jh8100_aon_pinctrl_suspend(struct device *dev)
+{
+ struct jh8100_pinctrl *sfp;
+ int i;
+
+ sfp = dev_get_drvdata(dev);
+ if (!sfp)
+ return -EINVAL;
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(sfp->wakeup_irq);
+
+ for (i = 0; i < sfp->info->nregs; i++)
+ sfp->jh8100_aon_regs[i] = readl_relaxed(sfp->base + (i * 4));
+
+ return pinctrl_force_sleep(sfp->pctl);
+}
+
+static int jh8100_aon_pinctrl_resume(struct device *dev)
+{
+ struct jh8100_pinctrl *sfp;
+ int i;
+
+ sfp = dev_get_drvdata(dev);
+ if (!sfp)
+ return -EINVAL;
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(sfp->wakeup_irq);
+
+ for (i = 0; i < sfp->info->nregs; i++)
+ writel_relaxed(sfp->jh8100_aon_regs[i], sfp->base + (i * 4));
+
+ return pinctrl_force_default(sfp->pctl);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(jh8100_aon_pinctrl_dev_pm_ops,
+ jh8100_aon_pinctrl_suspend,
+ jh8100_aon_pinctrl_resume);
+
+static const struct jh8100_gpio_irq_reg jh8100_aon_irq_reg = {
+ .is_reg_base = JH8100_AON_GPIOIS,
+ .ic_reg_base = JH8100_AON_GPIOIC,
+ .ibe_reg_base = JH8100_AON_GPIOIBE,
+ .iev_reg_base = JH8100_AON_GPIOIEV,
+ .ie_reg_base = JH8100_AON_GPIOIE,
+ .ris_reg_base = JH8100_AON_GPIORIS,
+ .mis_reg_base = JH8100_AON_GPIOMIS,
+ .ien_reg_base = JH8100_AON_GPIOEN,
+};
+
+static const struct jh8100_pinctrl_domain_info jh8100_aon_pinctrl_info = {
+ .pins = jh8100_aon_pins,
+ .npins = ARRAY_SIZE(jh8100_aon_pins),
+ .ngpios = JH8100_AON_NGPIO,
+ .gc_base = JH8100_AON_GC_BASE,
+ .name = JH8100_AON_DOMAIN_NAME,
+ .nregs = JH8100_AON_REG_NUM,
+ .dout_reg_base = JH8100_AON_DOUT,
+ .dout_mask = GENMASK(4, 0),
+ .doen_reg_base = JH8100_AON_DOEN,
+ .doen_mask = GENMASK(2, 0),
+ .gpi_reg_base = JH8100_AON_GPI,
+ .gpi_mask = GENMASK(4, 0),
+ .gpioin_reg_base = JH8100_AON_GPIOIN,
+ .irq_reg = &jh8100_aon_irq_reg,
+ .mis_pin_num = JH8100_AON_NGPIO
+};
+
+static const struct of_device_id jh8100_aon_pinctrl_of_match[] = {
+ {
+ .compatible = "starfive,jh8100-aon-pinctrl",
+ .data = &jh8100_aon_pinctrl_info,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, jh8100_aon_pinctrl_of_match);
+
+static struct platform_driver jh8100_aon_pinctrl_driver = {
+ .probe = jh8100_pinctrl_probe,
+ .driver = {
+ .name = "starfive-jh8100-aon-pinctrl",
+#ifdef CONFIG_PM_SLEEP
+ .pm = &jh8100_aon_pinctrl_dev_pm_ops,
+#endif
+ .of_match_table = jh8100_aon_pinctrl_of_match,
+ },
+};
+module_platform_driver(jh8100_aon_pinctrl_driver);
+
+MODULE_DESCRIPTION("Pinctrl driver for StarFive JH8100 SoC aon controller");
+MODULE_AUTHOR("Alex Soo <yuklin.soo@starfivetech.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.c b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.c
index 8c3e4a90d68d..edf2a6fb6da2 100644
--- a/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.c
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.c
@@ -416,6 +416,9 @@ static int jh8100_get_padcfg_base(struct jh8100_pinctrl *sfp,
} else if (!strcmp(sfp->info->name, JH8100_SYS_W_DOMAIN_NAME)) {
if (pin < JH8100_SYS_W_NGPIO)
return JH8100_SYS_W_GPO_PDA_00_15_CFG;
+ } else if (!strcmp(sfp->info->name, JH8100_AON_DOMAIN_NAME)) {
+ if (pin < JH8100_AON_NGPIO)
+ return JH8100_AON_GPO_PDA_00_15_CFG;
}

return -ENXIO;
diff --git a/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.h b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.h
index 90eef6417dd7..ba44a7dd96e1 100644
--- a/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.h
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.h
@@ -15,17 +15,21 @@
#define JH8100_SYS_W_DOMAIN_NAME "jh8100-sys-west"
#define JH8100_SYS_E_DOMAIN_NAME "jh8100-sys-east"
#define JH8100_SYS_G_DOMAIN_NAME "jh8100-sys-gmac"
+#define JH8100_AON_DOMAIN_NAME "jh8100-aon"

#define JH8100_SYS_W_NGPIO 16
#define JH8100_SYS_E_NGPIO 48
#define JH8100_SYS_G_NGPIO 0
+#define JH8100_AON_NGPIO 16

#define JH8100_SYS_W_REG_NUM 44
#define JH8100_SYS_E_REG_NUM 116
#define JH8100_SYS_G_REG_NUM 19
+#define JH8100_AON_REG_NUM 65

#define JH8100_SYS_W_GPO_PDA_00_15_CFG 0x074
#define JH8100_SYS_E_GPO_PDA_00_47_CFG 0x114
+#define JH8100_AON_GPO_PDA_00_15_CFG 0x90

struct jh8100_pinctrl {
struct device *dev;
@@ -40,6 +44,7 @@ struct jh8100_pinctrl {
unsigned int jh8100_sys_west_regs[JH8100_SYS_W_REG_NUM];
unsigned int jh8100_sys_east_regs[JH8100_SYS_E_REG_NUM];
unsigned int jh8100_sys_gmac_regs[JH8100_SYS_G_REG_NUM];
+ unsigned int jh8100_aon_regs[JH8100_AON_REG_NUM];
/* wakeup */
struct irq_domain *irq_domain;
struct gpio_desc *wakeup_gpio;
--
2.25.1