[PATCH v2 01/11] pinctrl: Add support for ADI SC5XX-family pinctrl
Oliver Gaskell via B4 Relay
devnull+Oliver.Gaskell.analog.com at kernel.org
Wed Sep 25 14:25:11 CEST 2024
From: Oliver Gaskell <Oliver.Gaskell at analog.com>
This adds support for pin configuration on the Analog Devices SC5XX SoC
family. This commit is largely a port of the Linux driver, which has not
yet been submitted upstream.
Co-developed-by: Nathan Barrett-Morrison <nathan.morrison at timesys.com>
Signed-off-by: Nathan Barrett-Morrison <nathan.morrison at timesys.com>
Co-developed-by: Ian Roberts <ian.roberts at timesys.com>
Signed-off-by: Ian Roberts <ian.roberts at timesys.com>
Signed-off-by: Vasileios Bimpikas <vasileios.bimpikas at analog.com>
Signed-off-by: Utsav Agarwal <utsav.agarwal at analog.com>
Signed-off-by: Arturs Artamonovs <arturs.artamonovs at analog.com>
Signed-off-by: Greg Malysa <greg.malysa at timesys.com>
Signed-off-by: Oliver Gaskell <Oliver.Gaskell at analog.com>
---
MAINTAINERS | 1 +
drivers/pinctrl/Kconfig | 8 ++
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/pinctrl-adi-adsp.c | 156 +++++++++++++++++++++++++++++++++
include/dt-bindings/pinctrl/adi-adsp.h | 21 +++++
5 files changed, 187 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 0f4eee367d..9810ccc3e3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -612,6 +612,7 @@ F: doc/device-tree-bindings/arm/adi/adi,sc5xx.yaml
F: doc/device-tree-bindings/clock/adi,sc5xx-clocks.yaml
F: doc/device-tree-bindings/timer/adi,sc5xx-gptimer.yaml
F: drivers/clk/adi/
+F: drivers/pinctrl/pinctrl-adi-adsp.c
F: drivers/serial/serial_adi_uart4.c
F: drivers/timer/adi_sc5xx_timer.c
F: include/configs/sc5*
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index a1d53cfbdb..a88a444218 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -170,6 +170,14 @@ config PINCTRL_APPLE
both the GPIO definitions and pin control functions for each
available multiplex function.
+config PINCTRL_ADI
+ bool "ADI pinctrl driver"
+ depends on DM && ARCH_SC5XX
+ help
+ This driver enables pinctrl support on SC5xx processors. This
+ driver covers only the pin configuration functionality, and
+ GPIO functionality is contained in the separate GPIO driver.
+
config PINCTRL_AR933X
bool "QCA/Athores ar933x pin control driver"
depends on DM && SOC_AR933X
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 6d7b7cd905..7dd56774bd 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -3,6 +3,7 @@
obj-y += pinctrl-uclass.o
obj-$(CONFIG_$(SPL_)PINCTRL_GENERIC) += pinctrl-generic.o
+obj-$(CONFIG_PINCTRL_ADI) += pinctrl-adi-adsp.o
obj-$(CONFIG_PINCTRL_APPLE) += pinctrl-apple.o
obj-$(CONFIG_PINCTRL_AT91) += pinctrl-at91.o
obj-$(CONFIG_PINCTRL_AT91PIO4) += pinctrl-at91-pio4.o
diff --git a/drivers/pinctrl/pinctrl-adi-adsp.c b/drivers/pinctrl/pinctrl-adi-adsp.c
new file mode 100644
index 0000000000..717ac8e005
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-adi-adsp.c
@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * (C) Copyright 2022 - Analog Devices, Inc.
+ *
+ * Written and/or maintained by Timesys Corporation
+ *
+ * Author: Greg Malysa <greg.malysa at timesys.com>
+ * Additional Contact: Nathan Barrett-Morrison <nathan.morrison at timesys.com>
+ *
+ * dm pinctrl implementation for ADI ADSP SoCs
+ *
+ */
+
+#include <dm.h>
+#include <dm/pinctrl.h>
+#include <dm/device_compat.h>
+#include <linux/bitops.h>
+#include <linux/io.h>
+
+#define ADSP_PORT_MMIO_SIZE 0x80
+#define ADSP_PORT_PIN_SIZE 16
+
+#define ADSP_PORT_PORT_MUX_BITS 2
+#define ADSP_PORT_PORT_MUX_MASK 0x03
+#define ADSP_PINCTRL_FUNCTION_COUNT 4
+
+#define ADSP_PORT_REG_FER 0x00
+#define ADSP_PORT_REG_FER_SET 0x04
+#define ADSP_PORT_REG_FER_CLEAR 0x08
+#define ADSP_PORT_REG_DATA 0x0c
+#define ADSP_PORT_REG_DATA_SET 0x10
+#define ADSP_PORT_REG_DATA_CLEAR 0x14
+#define ADSP_PORT_REG_DIR 0x18
+#define ADSP_PORT_REG_DIR_SET 0x1c
+#define ADSP_PORT_REG_DIR_CLEAR 0x20
+#define ADSP_PORT_REG_INEN 0x24
+#define ADSP_PORT_REG_INEN_SET 0x28
+#define ADSP_PORT_REG_INEN_CLEAR 0x2c
+#define ADSP_PORT_REG_PORT_MUX 0x30
+#define ADSP_PORT_REG_DATA_TGL 0x34
+#define ADSP_PORT_REG_POLAR 0x38
+#define ADSP_PORT_REG_POLAR_SET 0x3c
+#define ADSP_PORT_REG_POLAR_CLEAR 0x40
+#define ADSP_PORT_REG_LOCK 0x44
+#define ADSP_PORT_REG_TRIG_TGL 0x48
+
+struct adsp_pinctrl_priv {
+ void __iomem *base;
+ int npins;
+ char pinbuf[16];
+};
+
+static u32 get_port(unsigned int pin)
+{
+ return pin / ADSP_PORT_PIN_SIZE;
+}
+
+static u32 get_offset(unsigned int pin)
+{
+ return pin % ADSP_PORT_PIN_SIZE;
+}
+
+static int adsp_pinctrl_pinmux_set(struct udevice *udev, unsigned int pin, unsigned int func)
+{
+ struct adsp_pinctrl_priv *priv = dev_get_priv(udev);
+ void __iomem *portbase;
+ u32 port, offset;
+ u32 val;
+
+ if (pin >= priv->npins)
+ return -ENODEV;
+
+ if (func >= ADSP_PINCTRL_FUNCTION_COUNT)
+ return -EINVAL;
+
+ port = get_port(pin);
+ offset = get_offset(pin);
+ portbase = priv->base + port * ADSP_PORT_MMIO_SIZE;
+
+ val = ioread32(portbase + ADSP_PORT_REG_PORT_MUX);
+ val &= ~(ADSP_PORT_PORT_MUX_MASK << (ADSP_PORT_PORT_MUX_BITS * offset));
+ val |= func << (ADSP_PORT_PORT_MUX_BITS * offset);
+ iowrite32(val, portbase + ADSP_PORT_REG_PORT_MUX);
+
+ iowrite32(BIT(offset), portbase + ADSP_PORT_REG_FER_SET);
+ return 0;
+}
+
+static int adsp_pinctrl_set_state(struct udevice *udev, struct udevice *config)
+{
+ const struct fdt_property *pinlist;
+ int length = 0;
+ int ret, i;
+ u32 pin, function;
+
+ pinlist = dev_read_prop(config, "adi,pins", &length);
+ if (!pinlist) {
+ dev_err(udev, "missing adi,pins property in pinctrl config node\n");
+ return -EINVAL;
+ }
+
+ if (length % (sizeof(uint32_t) * 2)) {
+ dev_err(udev, "adi,pins property must be a multiple of two uint32_ts\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < length / sizeof(uint32_t); i += 2) {
+ ret = dev_read_u32_index(config, "adi,pins", i, &pin);
+ if (ret)
+ return ret;
+
+ ret = dev_read_u32_index(config, "adi,pins", i + 1, &function);
+ if (ret)
+ return ret;
+
+ ret = adsp_pinctrl_pinmux_set(udev, pin, function);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+const struct pinctrl_ops adsp_pinctrl_ops = {
+ .set_state = adsp_pinctrl_set_state,
+};
+
+static int adsp_pinctrl_probe(struct udevice *udev)
+{
+ struct adsp_pinctrl_priv *priv = dev_get_priv(udev);
+
+ priv->base = dev_read_addr_ptr(udev);
+ priv->npins = dev_read_u32_default(udev, "adi,npins", 0);
+
+ if (!priv->npins) {
+ dev_err(udev, "Missing adi,npins property!\n");
+ return -ENOENT;
+ }
+
+ return 0;
+}
+
+static const struct udevice_id adsp_pinctrl_match[] = {
+ { .compatible = "adi,adsp-pinctrl" },
+ { },
+};
+
+U_BOOT_DRIVER(adi_adsp_pinctrl) = {
+ .name = "adi_adsp_pinctrl",
+ .id = UCLASS_PINCTRL,
+ .of_match = adsp_pinctrl_match,
+ .probe = adsp_pinctrl_probe,
+ .priv_auto = sizeof(struct adsp_pinctrl_priv),
+ .ops = &adsp_pinctrl_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+};
diff --git a/include/dt-bindings/pinctrl/adi-adsp.h b/include/dt-bindings/pinctrl/adi-adsp.h
new file mode 100644
index 0000000000..7dc8a1ef5c
--- /dev/null
+++ b/include/dt-bindings/pinctrl/adi-adsp.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * (C) Copyright 2022 - Analog Devices, Inc.
+ *
+ * Written and/or maintained by Timesys Corporation
+ *
+ * Contact: Nathan Barrett-Morrison <nathan.morrison at timesys.com>
+ * Contact: Greg Malysa <greg.malysa at timesys.com>
+ *
+ */
+
+#ifndef DT_BINDINGS_PINCTRL_ADI_ADSP
+#define DT_BINDINGS_PINCTRL_ADI_ADSP
+
+#define ADI_ADSP_PIN(port, pin) (16 * ((port) - 'A') + (pin))
+#define ADI_ADSP_PINFUNC_ALT0 0
+#define ADI_ADSP_PINFUNC_ALT1 1
+#define ADI_ADSP_PINFUNC_ALT2 2
+#define ADI_ADSP_PINFUNC_ALT3 3
+
+#endif
--
2.34.1
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