[PATCH 13/21] pinctrl: Add drivers for ADI ADSP-SC5xx platform
From: Arturs Artamonovs via B4 Relay
Date: Thu Sep 12 2024 - 14:24:06 EST
From: Arturs Artamonovs <arturs.artamonovs@xxxxxxxxxx>
Add ADSP-SC5xx pinctrler:
- Support switching GPIO pin functions.
Signed-off-by: Arturs Artamonovs <Arturs.Artamonovs@xxxxxxxxxx>
Co-developed-by: Nathan Barrett-Morrison <nathan.morrison@xxxxxxxxxxx>
Signed-off-by: Nathan Barrett-Morrison <nathan.morrison@xxxxxxxxxxx>
Co-developed-by: Greg Malysa <greg.malysa@xxxxxxxxxxx>
Signed-off-by: Greg Malysa <greg.malysa@xxxxxxxxxxx>
---
drivers/pinctrl/Kconfig | 12 +
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/pinctrl-adsp.c | 919 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 932 insertions(+)
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 7e4f93a3bc7ac9bcafc92ddb795569d7cca6474d..ffc0946c5b416c29803e195016867aee8f09afe1 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -31,6 +31,18 @@ config DEBUG_PINCTRL
help
Say Y here to add some extra checks and diagnostics to PINCTRL calls.
+config PINCTRL_ADSP
+ bool "ADSP-SC5XX pinctrl driver"
+ depends on ARCH_SC59X_64
+ depends on OF
+ select PINMUX
+ select GPIOLIB
+ select GENERIC_PINCONF
+ help
+ Say Y here to enable the ADSP-SC5XX pinctrl driver. This is required for
+ correct peripheral functionality on the SoC.
+
+
config PINCTRL_AMD
bool "AMD GPIO pin control"
depends on HAS_IOMEM
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index cc809669405ab6c6905fe0b2380f91b211a2d470..6b340bf0ee8c0267cbbdee3d14db605a340433c6 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_PINCONF) += pinconf.o
obj-$(CONFIG_GENERIC_PINCONF) += pinconf-generic.o
obj-$(CONFIG_OF) += devicetree.o
+obj-$(CONFIG_PINCTRL_ADSP) += pinctrl-adsp.o
obj-$(CONFIG_PINCTRL_AMD) += pinctrl-amd.o
obj-$(CONFIG_PINCTRL_APPLE_GPIO) += pinctrl-apple-gpio.o
obj-$(CONFIG_PINCTRL_ARTPEC6) += pinctrl-artpec6.o
diff --git a/drivers/pinctrl/pinctrl-adsp.c b/drivers/pinctrl/pinctrl-adsp.c
new file mode 100644
index 0000000000000000000000000000000000000000..ce86e579e5601203a446c09b5b5f7f60aba6d02a
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-adsp.c
@@ -0,0 +1,919 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Analog Devices ADSP family pinctrl driver.
+ *
+ * Copyright 2022-2024 - Analog Devices Inc.
+ */
+
+#include <linux/of.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/platform_device.h>
+#include <linux/printk.h>
+#include <linux/soc/adi/adsp-gpio-port.h>
+
+#include "core.h"
+#include "pinconf.h"
+#include "pinctrl-utils.h"
+
+/* Convert from pinmux constants in device tree to actual settings */
+#define ADSP_PINMUX_PIN(p) ((p & 0xffffff00) >> 8)
+#define ADSP_PINMUX_FUNC(p) (p & 0xff)
+
+/* Details of the PORT_MUX register */
+#define ADSP_PORT_PORT_MUX_BITS 2
+#define ADSP_PORT_PORT_MUX_MASK GENMASK(1, 0)
+
+/* Number of pin alternate functions, see pin_functions array */
+#define ADSP_NUMBER_OF_PIN_FUNCTIONS ARRAY_SIZE(pin_functions)
+
+/* Information for drive strength registers */
+#define ADSP_PADS_DS_BITS 3
+#define ADSP_PADS_DS_PINS_PER_REG 8
+#define ADSP_PADS_DS_HIGH 2
+#define ADSP_PADS_DS_LOW 1
+
+/* Information for pull up/pull down enable registers */
+#define ADSP_PADS_PUD_PINS_PER_REG 16
+
+#define ADSP_PADS_REG_PCFG0 0x04
+#define ADSP_PADS_REG_PCFG1 0x08
+/* Convert from pin number (e.g. 0-143) to drive strength register offset */
+#define ADSP_PADS_PORTx_DS(p) (0x0c + 0x04*(p/ADSP_PADS_DS_PINS_PER_REG))
+#define ADSP_PADS_NONPORTS_DS 0x50
+/* Convert from pin number to pull up enable register offset */
+#define ADSP_PADS_PORTx_PUE(p) (0x98 + 0x04*(p/ADSP_PADS_PUD_PINS_PER_REG))
+/* Convert from pin number to pull down enable register offset */
+#define ADSP_PADS_PORTx_PDE(p) (0xc4 + 0x04*(p/ADSP_PADS_PUD_PINS_PER_REG))
+
+/* Non GPIO PORT drive strength settings */
+#define ADSP_NONPORTS_DS_CKOUT 0
+#define ADSP_NONPORTS_DS_RESOUTB 1
+#define ADSP_NONPORTS_DS_FAULTB 2
+#define ADSP_NONPORTS_DS_LP1CK 3
+#define ADSP_NONPORTS_DS_LP0CK 4
+#define ADSP_NONPORTS_DS_OSPI 5
+
+/* DAI pad configuration offsets */
+#define ADSP_PADS_REG_DAI0_0_DS 0x78
+#define ADSP_PADS_REG_DAI0_1_DS 0x7c
+#define ADSP_PADS_REG_DAI1_0_DS 0x80
+#define ADSP_PADS_REG_DAI1_1_DS 0x84
+
+#define ADSP_PADS_REG_DAI0_PUE 0xbc
+#define ADSP_PADS_REG_DAI1_PUE 0xc0
+#define ADSP_PADS_REG_DAI0_PDE 0xfc
+#define ADSP_PADS_REG_DAI1_PDE 0x100
+
+/*
+ * Represents a function setting for pins, controls the mux modes essentially
+ */
+struct adsp_pin_function {
+ const char *name;
+ /* 0 for gpio, 1-4 for alt functions 0-3 */
+ uint8_t mode;
+};
+
+/*
+ * Available pin function settings in the pin mux for GPIO-associated pins
+ */
+static const struct adsp_pin_function pin_functions[] = {
+ {
+ .name = "gpio",
+ .mode = 0,
+ }, {
+ .name = "alt0",
+ .mode = 1,
+ }, {
+ .name = "alt1",
+ .mode = 2,
+ }, {
+ .name = "alt2",
+ .mode = 3,
+ }, {
+ .name = "alt3",
+ .mode = 4,
+ }
+};
+
+/*
+ * One pinctrl instance per chip, unifies the interface to the port mux and pad
+ * conf registers in the PORT instances
+ * @todo pads registers should be routed through system configuration abstraction
+ * to remove the need for feature testing/listing "missing" registers here
+ */
+struct adsp_pinctrl {
+ struct device *dev;
+ struct pinctrl_dev *pin_dev;
+ void __iomem *regs;
+ const char **group_names;
+ unsigned int *pins;
+ spinlock_t lock;
+ size_t num_ports;
+ uint32_t *pin_counts;
+ uint32_t total_pins;
+
+ /* Are the drive strength registers missing on this part? */
+ bool ds_missing;
+
+ /* Are the pull up/down enable registers missing on this part? */
+ bool pude_missing;
+};
+
+/*
+ * Custom pinconf properties
+ */
+#define ADSP_PIN_CONFIG_TRU_TOGGLE (PIN_CONFIG_END+1)
+
+static const struct pinconf_generic_params adsp_custom_bindings[] = {
+ /* Configure this pin as a toggle pin which flip each time a trigger event
+ * is received by the pin controller from the TRU
+ */
+ {"adi,tru-toggle", ADSP_PIN_CONFIG_TRU_TOGGLE, 0}
+};
+
+static const struct pin_config_item adsp_conf_items[] = {
+ PCONFDUMP(ADSP_PIN_CONFIG_TRU_TOGGLE, "tru-toggle", NULL, false),
+};
+
+/* does not need lock */
+static void adsp_set_pin_gpio(struct adsp_gpio_port *port, unsigned int offset, bool gpio)
+{
+ if (gpio)
+ __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_FER_CLEAR);
+ else
+ __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_FER_SET);
+}
+
+/*
+ * Configure a pin either for gpio or an alternate function
+ */
+static void adsp_portmux_setup(struct adsp_gpio_port *port, unsigned int offset,
+ const struct adsp_pin_function *func)
+{
+ if (func->mode == 0) {
+ adsp_set_pin_gpio(port, offset, true);
+ } else {
+ unsigned long flags;
+ u32 val;
+ u32 f = (func->mode - 1) & ADSP_PORT_PORT_MUX_MASK;
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ val = __adsp_gpio_readl(port, ADSP_PORT_REG_PORT_MUX);
+ val &= ~(ADSP_PORT_PORT_MUX_MASK << (ADSP_PORT_PORT_MUX_BITS * offset));
+ val |= f << (ADSP_PORT_PORT_MUX_BITS * offset);
+ __adsp_gpio_writel(port, val, ADSP_PORT_REG_PORT_MUX);
+
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ adsp_set_pin_gpio(port, offset, false);
+ }
+}
+
+/* pin control operations */
+static int adsp_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct adsp_pinctrl *adsp_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return adsp_pinctrl->total_pins;
+}
+
+static const char *adsp_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned int selector)
+{
+ struct adsp_pinctrl *adsp_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return adsp_pinctrl->group_names[selector];
+}
+
+static int adsp_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, unsigned int selector,
+ const unsigned int **pins, unsigned int *num_pins)
+{
+ struct adsp_pinctrl *adsp_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+ *pins = &adsp_pinctrl->pins[selector];
+ *num_pins = 1;
+ return 0;
+}
+
+static int adsp_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np, struct pinctrl_map **map, unsigned int *reserved_maps,
+ unsigned int *num_maps)
+{
+ struct adsp_pinctrl *adsp_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+ //struct property *prop;
+ const char *group;
+ unsigned long *configs;
+ unsigned int num_configs, num_pins;
+ unsigned int reserve = 0;
+ //uint32_t pinmux;
+ //const __be32 *p;
+ u32 array[2];
+ int sz, i;
+ int ret;
+
+ num_pins = of_property_count_u32_elems(np, "pinmux");
+ if (num_pins <= 0) {
+ dev_err(adsp_pinctrl->dev, "Must have at least one `pinmux` entry in %pOFn.\n",
+ np);
+ return -EINVAL;
+ }
+
+ ret = pinconf_generic_parse_dt_config(np, pctldev, &configs, &num_configs);
+ if (ret)
+ return ret;
+
+ /* One configuration for the whole group, potentially */
+ reserve = num_pins;
+ if (num_configs)
+ reserve = reserve * 2;
+
+ ret = pinctrl_utils_reserve_map(pctldev, map, reserved_maps, num_maps, reserve);
+ if (ret)
+ goto exit;
+
+ sz = of_property_read_variable_u32_array(np, "pinmux", array, 2, 2);
+ sz = (sz == -EINVAL) ? 0 : sz; /* Missing property is OK */
+ if (sz < 0)
+ return dev_err_probe(adsp_pinctrl->dev, sz, "invalid pinmux\n");
+
+
+ for (i = 0; i < sz; i += 2) {
+ u32 pin = array[i];
+ u32 func = array[i + 1];
+
+ if (func >= ADSP_NUMBER_OF_PIN_FUNCTIONS) {
+ dev_err(adsp_pinctrl->dev,
+ "Function number %d is not available for pin %d in %pOFn.n\n",
+ func, pin, np);
+ goto exit;
+ }
+
+ group = adsp_pinctrl->group_names[pin];
+ ret = pinctrl_utils_add_map_mux(pctldev, map, reserved_maps, num_maps,
+ group, pin_functions[func].name);
+ if (ret)
+ goto exit;
+
+ if (num_configs) {
+ ret = pinctrl_utils_add_map_configs(pctldev, map, reserved_maps, num_maps,
+ group, configs, num_configs, PIN_MAP_TYPE_CONFIGS_GROUP);
+ if (ret)
+ goto exit;
+ }
+ }
+
+ ret = 0;
+exit:
+ kfree(configs);
+ return ret;
+}
+
+/**
+ * Handle device tree structures like:
+ *
+ * pinctrl_uart0_hwflow: uart0_hwflow_pins {
+ * pins_rxtx_ {
+ * pinmux = <1>, <2>;
+ * some-padconf-flag;
+ * };
+ * pins_hwflow {
+ * pinmux = <3>, <4>;
+ * some-other-padconf-flag;
+ * };
+ * };
+ *
+ * where &pinctrl_uart0_hwflow is passed as an entry in pinctrl-0 on uart driver and
+ * enables all sub-pins at once
+ */
+static int adsp_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np, struct pinctrl_map **map, unsigned int *num_maps)
+{
+ unsigned int reserved_maps;
+ struct device_node *child_np;
+ int ret;
+
+ reserved_maps = 0;
+ *map = NULL;
+ *num_maps = 0;
+
+ for_each_child_of_node(np, child_np) {
+ ret = adsp_pinctrl_dt_subnode_to_map(pctldev, child_np, map,
+ &reserved_maps, num_maps);
+ if (ret < 0)
+ goto exit;
+ }
+ return 0;
+
+exit:
+ pinctrl_utils_free_map(pctldev, *map, *num_maps);
+ return ret;
+}
+
+static const struct pinctrl_ops adsp_pctlops = {
+ .get_groups_count = adsp_pinctrl_get_groups_count,
+ .get_group_name = adsp_pinctrl_get_group_name,
+ .get_group_pins = adsp_pinctrl_get_group_pins,
+ .dt_node_to_map = adsp_pinctrl_dt_node_to_map,
+ .dt_free_map = pinconf_generic_dt_free_map,
+};
+
+/* pin mux operations */
+static int adsp_pinmux_get_functions_count(struct pinctrl_dev *pctldev)
+{
+ return ADSP_NUMBER_OF_PIN_FUNCTIONS;
+}
+
+static const char *adsp_pinmux_get_function_name(struct pinctrl_dev *pctldev,
+ unsigned int selector)
+{
+ return pin_functions[selector].name;
+}
+
+static int adsp_pinmux_get_function_groups(struct pinctrl_dev *pctldev,
+ unsigned int selector, const char * const **groups, unsigned * const num_groups)
+{
+ struct adsp_pinctrl *adsp_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = adsp_pinctrl->group_names;
+ *num_groups = adsp_pinctrl->total_pins;
+ return 0;
+}
+
+/* Each group is exactly 1 pin and group id == pin id */
+static int adsp_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned int func,
+ unsigned int group)
+{
+ struct adsp_gpio_port *port;
+ struct pinctrl_gpio_range *range;
+ u32 offset;
+
+ range = pinctrl_find_gpio_range_from_pin(pctldev, group);
+ if (!range || !range->gc)
+ return -EPROBE_DEFER;
+
+ offset = group - range->pin_base;
+
+ port = to_adsp_gpio_port(range->gc);
+ adsp_portmux_setup(port, offset, &pin_functions[func]);
+
+ return 0;
+}
+
+static int adsp_pinmux_request_gpio(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range, unsigned int pin)
+{
+ struct adsp_gpio_port *port = to_adsp_gpio_port(range->gc);
+ u32 offset = pin - range->pin_base;
+
+ adsp_set_pin_gpio(port, offset, true);
+ return 0;
+}
+
+static void adsp_pinmux_release_gpio(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range, unsigned int pin)
+{
+ struct adsp_gpio_port *port = to_adsp_gpio_port(range->gc);
+ u32 offset = pin - range->pin_base;
+
+ adsp_set_pin_gpio(port, offset, false);
+}
+
+static const struct pinmux_ops adsp_pmxops = {
+ .get_functions_count = adsp_pinmux_get_functions_count,
+ .get_function_name = adsp_pinmux_get_function_name,
+ .get_function_groups = adsp_pinmux_get_function_groups,
+ .set_mux = adsp_pinmux_set_mux,
+ .gpio_request_enable = adsp_pinmux_request_gpio,
+ .gpio_disable_free = adsp_pinmux_release_gpio,
+};
+
+/* pin configuration operations */
+static bool __adsp_pinconf_is_pue(struct adsp_pinctrl *p, unsigned int pin)
+{
+ u32 offset = ADSP_PADS_PORTx_PUE(pin);
+ u32 val, bit;
+
+ if (p->pude_missing)
+ return 0;
+
+ val = readl(p->regs + offset);
+ bit = BIT(pin & (ADSP_PADS_PUD_PINS_PER_REG-1));
+ return !!(val & bit);
+}
+
+static bool __adsp_pinconf_is_pde(struct adsp_pinctrl *p, unsigned int pin)
+{
+ u32 offset = ADSP_PADS_PORTx_PDE(pin);
+ u32 val, bit;
+
+ if (p->pude_missing)
+ return 0;
+
+ val = readl(p->regs + offset);
+ bit = BIT(pin & (ADSP_PADS_PUD_PINS_PER_REG-1));
+ return !!(val & bit);
+}
+
+static u32 __adsp_pinconf_get_ds(struct adsp_pinctrl *p, unsigned int pin)
+{
+ u32 offset = ADSP_PADS_PORTx_DS(pin);
+ u32 val, shift, mask;
+
+ if (p->ds_missing)
+ return 0;
+
+ val = readl(p->regs + offset);
+ shift = (pin & (ADSP_PADS_DS_PINS_PER_REG-1)) * ADSP_PADS_DS_BITS;
+ mask = GENMASK(ADSP_PADS_DS_BITS-1, 0) << shift;
+ val = val & mask;
+
+ if (val == ADSP_PADS_DS_HIGH)
+ return 1;
+ return 0;
+}
+
+/* seems we return -EINVAL for disabled static option, -ENOTSUPP for not supported,
+ * and otherwise the argument is included in config
+ */
+static int adsp_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *config)
+{
+ struct adsp_pinctrl *adsp_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+ struct pinctrl_gpio_range *range;
+ struct adsp_gpio_port *port;
+ u32 offset, val;
+ u32 param = pinconf_to_config_param(*config);
+ u32 arg = 0;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ if (__adsp_pinconf_is_pue(adsp_pinctrl, pin) ||
+ __adsp_pinconf_is_pde(adsp_pinctrl, pin))
+ return -EINVAL;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (!__adsp_pinconf_is_pde(adsp_pinctrl, pin))
+ return -EINVAL;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (!__adsp_pinconf_is_pue(adsp_pinctrl, pin))
+ return -EINVAL;
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ arg = __adsp_pinconf_get_ds(adsp_pinctrl, pin);
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin);
+ offset = pin - range->pin_base;
+ port = to_adsp_gpio_port(range->gc);
+
+ if (!(port->open_drain & BIT(offset)))
+ return -EINVAL;
+ break;
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin);
+ offset = pin - range->pin_base;
+ port = to_adsp_gpio_port(range->gc);
+
+ if (port->open_drain & BIT(offset))
+ return -EINVAL;
+ break;
+ case ADSP_PIN_CONFIG_TRU_TOGGLE:
+ range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin);
+ offset = pin - range->pin_base;
+ port = to_adsp_gpio_port(range->gc);
+
+ val = __adsp_gpio_readl(port, ADSP_PORT_REG_TRIG_TGL);
+ if (!(val & BIT(offset)))
+ return -EINVAL;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ *config = pinconf_to_config_packed(param, arg);
+
+ return 0;
+}
+
+static void __adsp_pinconf_pue(struct adsp_pinctrl *p, unsigned int pin, bool state)
+{
+ u32 offset = ADSP_PADS_PORTx_PUE(pin);
+ u32 val, bit;
+
+ if (p->pude_missing) {
+ dev_warn(p->dev,
+ "Pull Up Enable is not supported by this PADS HW (tried to set PUE for pin %d)\n",
+ pin);
+ return;
+ }
+
+ val = readl(p->regs + offset);
+ bit = BIT(pin & (ADSP_PADS_PUD_PINS_PER_REG-1));
+
+ if (state)
+ writel(val | bit, p->regs + offset);
+ else
+ writel(val & ~bit, p->regs + offset);
+}
+
+static void __adsp_pinconf_pde(struct adsp_pinctrl *p, unsigned int pin, bool state)
+{
+ u32 offset = ADSP_PADS_PORTx_PDE(pin);
+ u32 val, bit;
+
+ if (p->pude_missing) {
+ dev_warn(p->dev,
+ "Pull Down Enable is not supported by this PADS HW (tried to set PDE for pin %d)\n",
+ pin);
+ return;
+ }
+
+ val = readl(p->regs + offset);
+ bit = BIT(pin & (ADSP_PADS_PUD_PINS_PER_REG-1));
+
+ if (state)
+ writel(val | bit, p->regs + offset);
+ else
+ writel(val & ~bit, p->regs + offset);
+}
+
+static void __adsp_pinconf_ds(struct adsp_pinctrl *p, unsigned int pin, bool high)
+{
+ u32 offset = ADSP_PADS_PORTx_DS(pin);
+ u32 val, shift, mask;
+
+ if (p->ds_missing) {
+ dev_warn(p->dev,
+ "Drive strength is not supported by this PADS HW (tried to set drive strength for pin %d)\n",
+ pin);
+ return;
+ }
+
+ val = readl(p->regs + offset);
+ shift = (pin & (ADSP_PADS_DS_PINS_PER_REG-1)) * ADSP_PADS_DS_BITS;
+ mask = GENMASK(ADSP_PADS_DS_BITS-1, 0) << shift;
+ val = val & ~mask;
+
+ if (high)
+ writel(val | (ADSP_PADS_DS_HIGH << shift), p->regs + offset);
+ else
+ writel(val | (ADSP_PADS_DS_LOW << shift), p->regs + offset);
+}
+
+static int adsp_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *config, unsigned int num_configs)
+{
+ struct adsp_pinctrl *adsp_pinctrl = pinctrl_dev_get_drvdata(pctldev);
+ struct pinctrl_gpio_range *range;
+ struct adsp_gpio_port *port;
+ u32 param, arg, val;
+ u32 offset;
+ int cfg;
+ int ret = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&adsp_pinctrl->lock, flags);
+
+ for (cfg = 0; cfg < num_configs; ++cfg) {
+ param = pinconf_to_config_param(config[cfg]);
+ arg = pinconf_to_config_argument(config[cfg]);
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ __adsp_pinconf_pue(adsp_pinctrl, pin, false);
+ __adsp_pinconf_pde(adsp_pinctrl, pin, false);
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ __adsp_pinconf_pde(adsp_pinctrl, pin, !!arg);
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ __adsp_pinconf_pue(adsp_pinctrl, pin, !!arg);
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ /* This only supports high/low-speed drive strength (see HRM)
+ * so assume any positive value means we would like high-speed strength
+ */
+ __adsp_pinconf_ds(adsp_pinctrl, pin, !!arg);
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ range = pinctrl_find_gpio_range_from_pin(pctldev, pin);
+ offset = pin - range->pin_base;
+ port = to_adsp_gpio_port(range->gc);
+
+ spin_lock(&port->lock);
+ val = __adsp_gpio_readw(port, ADSP_PORT_REG_DATA);
+ val &= BIT(offset);
+
+ if (val) {
+ /* open drain with value of 1 => configure as input */
+ __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_DIR_CLEAR);
+ __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_INEN_SET);
+ } else {
+ /* open drain with value of 0 => configure as output, drive 0 */
+ __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_INEN_CLEAR);
+ __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_DATA_CLEAR);
+ __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_DIR_SET);
+ }
+
+ port->open_drain |= BIT(offset);
+ spin_unlock(&port->lock);
+ break;
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ range = pinctrl_find_gpio_range_from_pin(pctldev, pin);
+ offset = pin - range->pin_base;
+ port = to_adsp_gpio_port(range->gc);
+
+ spin_lock(&port->lock);
+
+ /*
+ * by default make the pin an input when exiting open drain mode;
+ * user can correct later with GPIO in/out configuration
+ */
+ if (port->open_drain & BIT(offset)) {
+ port->open_drain &= ~BIT(offset);
+ __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_DIR_CLEAR);
+ __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_INEN_SET);
+ }
+
+ spin_unlock(&port->lock);
+ break;
+ case ADSP_PIN_CONFIG_TRU_TOGGLE:
+ range = pinctrl_find_gpio_range_from_pin(pctldev, pin);
+ offset = pin - range->pin_base;
+ port = to_adsp_gpio_port(range->gc);
+
+ spin_lock(&port->lock);
+ val = __adsp_gpio_readl(port, ADSP_PORT_REG_TRIG_TGL);
+ val |= BIT(offset);
+ __adsp_gpio_writel(port, val, ADSP_PORT_REG_TRIG_TGL);
+ spin_unlock(&port->lock);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ goto end;
+ }
+ }
+
+end:
+ spin_unlock_irqrestore(&adsp_pinctrl->lock, flags);
+ return ret;
+}
+
+/* Config for all pins must match or we have an error regarding group structure */
+static int adsp_pinconf_group_get(struct pinctrl_dev *pctldev, unsigned int group,
+ unsigned long *config)
+{
+ const unsigned int *pins;
+ unsigned int npins, i;
+ unsigned long first;
+ int ret;
+
+ ret = adsp_pinctrl_get_group_pins(pctldev, group, &pins, &npins);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < npins; ++i) {
+ ret = adsp_pinconf_get(pctldev, pins[i], config);
+ if (ret)
+ return ret;
+
+ if (i == 0)
+ first = *config;
+
+ if (first != *config)
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int adsp_pinconf_group_set(struct pinctrl_dev *pctldev, unsigned int group,
+ unsigned long *configs, unsigned int num_configs)
+{
+ const unsigned int *pins;
+ unsigned int npins, i;
+ int ret;
+
+ ret = adsp_pinctrl_get_group_pins(pctldev, group, &pins, &npins);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < npins; ++i) {
+ ret = adsp_pinconf_set(pctldev, pins[i], configs, num_configs);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct pinconf_ops adsp_confops = {
+ .is_generic = true,
+ .pin_config_get = adsp_pinconf_get,
+ .pin_config_set = adsp_pinconf_set,
+ .pin_config_group_get = adsp_pinconf_group_get,
+ .pin_config_group_set = adsp_pinconf_group_set,
+#ifdef CONFIG_DEBUG_FS
+ .pin_config_config_dbg_show = pinconf_generic_dump_config,
+#endif
+};
+
+/*
+ * We want to make one group per pin so that we can refer to the pins by group
+ * later on when mux assignments are made
+ */
+static int adsp_pinctrl_init_groups(struct adsp_pinctrl *adsp_pinctrl,
+ struct pinctrl_desc *desc)
+{
+ struct device *dev = adsp_pinctrl->dev;
+ struct pinctrl_pin_desc *all_pins;
+ size_t port, pin;
+ unsigned int i, pin_total;
+ int num_ports;
+ int ret;
+
+ num_ports = of_property_count_u32_elems(dev->of_node, "adi,port-sizes");
+
+ if (num_ports < 0)
+ return num_ports;
+
+ if (num_ports == 0) {
+ dev_err(dev, "pinctrl missing `adi,port-sizes` port size definition\n");
+ return -ENOENT;
+ }
+
+ adsp_pinctrl->num_ports = num_ports;
+
+ adsp_pinctrl->pin_counts = devm_kcalloc(dev, sizeof(*adsp_pinctrl->pin_counts),
+ num_ports, GFP_KERNEL);
+ if (!adsp_pinctrl->pin_counts)
+ return -ENOMEM;
+
+ ret = of_property_read_u32_array(dev->of_node, "adi,port-sizes",
+ adsp_pinctrl->pin_counts, num_ports);
+ if (ret)
+ return ret;
+
+ pin_total = 0;
+
+ for (i = 0; i < num_ports; ++i)
+ pin_total += adsp_pinctrl->pin_counts[i];
+
+ adsp_pinctrl->total_pins = pin_total;
+
+ all_pins = devm_kcalloc(dev, sizeof(*all_pins), adsp_pinctrl->total_pins,
+ GFP_KERNEL);
+
+ adsp_pinctrl->pins = devm_kcalloc(dev, sizeof(adsp_pinctrl->pins),
+ adsp_pinctrl->total_pins, GFP_KERNEL);
+ if (!adsp_pinctrl->pins)
+ return -ENOMEM;
+
+ adsp_pinctrl->group_names = devm_kcalloc(dev, sizeof(*adsp_pinctrl->group_names),
+ adsp_pinctrl->total_pins, GFP_KERNEL);
+ if (!adsp_pinctrl->group_names)
+ return -ENOMEM;
+
+ i = 0;
+ for (port = 0; port < adsp_pinctrl->num_ports; ++port) {
+ for (pin = 0; pin < adsp_pinctrl->pin_counts[port]; ++pin) {
+ adsp_pinctrl->group_names[i] = devm_kasprintf(dev, GFP_KERNEL,
+ "p%c%zu", (char) ('A' + port), pin);
+ adsp_pinctrl->pins[i] = i;
+
+ all_pins[i].name = adsp_pinctrl->group_names[i];
+ all_pins[i].number = i;
+ i += 1;
+ }
+ }
+
+ desc->pins = all_pins;
+ desc->npins = adsp_pinctrl->total_pins;
+
+ return 0;
+}
+
+static void adsp_set_nongpio_ds(struct adsp_pinctrl *p, int type, bool high)
+{
+ u32 val = readl(p->regs + ADSP_PADS_NONPORTS_DS);
+ u32 shift = ADSP_PADS_DS_BITS * type;
+ u32 mask = GENMASK(ADSP_PADS_DS_BITS-1, 0) << shift;
+
+ val = val & ~mask;
+
+ if (high)
+ writel(val | (ADSP_PADS_DS_HIGH << shift), p->regs + ADSP_PADS_NONPORTS_DS);
+ else
+ writel(val | (ADSP_PADS_DS_LOW << shift), p->regs + ADSP_PADS_NONPORTS_DS);
+}
+
+static int adsp_pinctrl_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct adsp_pinctrl *adsp_pinctrl;
+ struct pinctrl_desc *pnctrl_desc;
+ struct resource *res;
+ u32 val;
+ int ret;
+
+ adsp_pinctrl = devm_kzalloc(dev, sizeof(*adsp_pinctrl), GFP_KERNEL);
+ if (!adsp_pinctrl)
+ return -ENOMEM;
+
+ adsp_pinctrl->dev = dev;
+ pnctrl_desc = devm_kzalloc(dev, sizeof(*pnctrl_desc), GFP_KERNEL);
+ if (!pnctrl_desc)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ adsp_pinctrl->regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(adsp_pinctrl->regs))
+ return PTR_ERR(adsp_pinctrl->regs);
+
+ /* Different features are available in different hw revisions; no way to read this
+ * from an ID register so the missing features need to be specified in dts
+ */
+ adsp_pinctrl->ds_missing = of_property_read_bool(np, "adi,no-drive-strength");
+ adsp_pinctrl->pude_missing = of_property_read_bool(np, "adi,no-pull-up-down");
+
+ /* Only if requested, adjust non-port drive strengths */
+ ret = of_property_read_u32(np, "adi,clkout-drive-strength", &val);
+ if (!ret)
+ adsp_set_nongpio_ds(adsp_pinctrl, ADSP_NONPORTS_DS_CKOUT, !!val);
+
+ ret = of_property_read_u32(np, "adi,resoutb-drive-strength", &val);
+ if (!ret)
+ adsp_set_nongpio_ds(adsp_pinctrl, ADSP_NONPORTS_DS_RESOUTB, !!val);
+
+ ret = of_property_read_u32(np, "adi,faultb-drive-strength", &val);
+ if (!ret)
+ adsp_set_nongpio_ds(adsp_pinctrl, ADSP_NONPORTS_DS_FAULTB, !!val);
+
+ ret = of_property_read_u32(np, "adi,lp1ck-drive-strength", &val);
+ if (!ret)
+ adsp_set_nongpio_ds(adsp_pinctrl, ADSP_NONPORTS_DS_LP1CK, !!val);
+
+ ret = of_property_read_u32(np, "adi,lp0ck-drive-strength", &val);
+ if (!ret)
+ adsp_set_nongpio_ds(adsp_pinctrl, ADSP_NONPORTS_DS_LP0CK, !!val);
+
+ ret = of_property_read_u32(np, "adi,ospi-drive-strength", &val);
+ if (!ret)
+ adsp_set_nongpio_ds(adsp_pinctrl, ADSP_NONPORTS_DS_OSPI, !!val);
+
+ pnctrl_desc->name = dev_name(dev);
+ pnctrl_desc->pctlops = &adsp_pctlops;
+ pnctrl_desc->confops = &adsp_confops;
+ pnctrl_desc->pmxops = &adsp_pmxops;
+ pnctrl_desc->owner = THIS_MODULE;
+ pnctrl_desc->num_custom_params = ARRAY_SIZE(adsp_custom_bindings);
+ pnctrl_desc->custom_params = adsp_custom_bindings;
+ pnctrl_desc->custom_conf_items = adsp_conf_items;
+
+ spin_lock_init(&adsp_pinctrl->lock);
+ ret = adsp_pinctrl_init_groups(adsp_pinctrl, pnctrl_desc);
+ if (ret)
+ return ret;
+
+ ret = devm_pinctrl_register_and_init(dev, pnctrl_desc, adsp_pinctrl,
+ &adsp_pinctrl->pin_dev);
+ if (ret)
+ return ret;
+
+ platform_set_drvdata(pdev, adsp_pinctrl);
+ ret = pinctrl_enable(adsp_pinctrl->pin_dev);
+ return ret;
+}
+
+static const struct of_device_id adsp_pinctrl_of_match[] = {
+ { .compatible = "adi,adsp-pinctrl", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, adsp_pinctrl_of_match);
+
+static struct platform_driver adsp_pinctrl_driver = {
+ .driver = {
+ .name = "adsp-pinctrl",
+ .of_match_table = adsp_pinctrl_of_match,
+ .suppress_bind_attrs = true,
+ },
+ .probe = adsp_pinctrl_probe,
+};
+
+static int __init adsp_pinctrl_init(void)
+{
+ return platform_driver_register(&adsp_pinctrl_driver);
+}
+
+/*
+ * We want the pinctrl driver to be available at arch init time not at the
+ * later device init time
+ */
+arch_initcall(adsp_pinctrl_init);
+
+MODULE_AUTHOR("Greg Malysa <greg.malysa@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("Analog Devices Pinctrl driver");
+MODULE_LICENSE("GPL v2");
\ No newline at end of file
--
2.25.1