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|
// SPDX-License-Identifier: GPL-2.0
/*
* Intel Thunder Bay SOC pinctrl/GPIO driver
*
* Copyright (C) 2021 Intel Corporation
*/
#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio/driver.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_irq.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/slab.h>
#include <linux/spinlock.h>
#include "core.h"
#include "pinconf.h"
#include "pinctrl-utils.h"
#include "pinmux.h"
/* Bit 0:2 and 4:6 should be used for mode selection */
#define THB_GPIO_PINMUX_MODE_0 0x00
#define THB_GPIO_PINMUX_MODE_1 0x11
#define THB_GPIO_PINMUX_MODE_2 0x22
#define THB_GPIO_PINMUX_MODE_3 0x33
#define THB_GPIO_PINMUX_MODE_4 0x44
#define THB_GPIO_PORT_SELECT_MASK BIT(8)
#define THB_GPIO_PAD_DIRECTION_MASK BIT(10)
#define THB_GPIO_SPU_MASK BIT(11)
#define THB_GPIO_PULL_ENABLE_MASK BIT(12)
#define THB_GPIO_PULL_UP_MASK BIT(13)
#define THB_GPIO_PULL_DOWN_MASK BIT(14)
#define THB_GPIO_ENAQ_MASK BIT(15)
/* bit 16-19: Drive Strength for the Pad */
#define THB_GPIO_DRIVE_STRENGTH_MASK (0xF0000)
#define THB_GPIO_SLEW_RATE_MASK BIT(20)
#define THB_GPIO_SCHMITT_TRIGGER_MASK BIT(21)
#define THB_GPIO_REG_OFFSET(pin_num) ((pin_num) * (0x4))
#define THB_MAX_MODE_SUPPORTED (5u)
#define THB_MAX_NPINS_SUPPORTED (67u)
/* store Pin status */
static u32 thb_pinx_status[THB_MAX_NPINS_SUPPORTED];
struct thunderbay_mux_desc {
u8 mode;
const char *name;
};
#define THUNDERBAY_PIN_DESC(pin_number, pin_name, ...) { \
.number = pin_number, \
.name = pin_name, \
.drv_data = &(struct thunderbay_mux_desc[]) { \
__VA_ARGS__, { } }, \
}
#define THUNDERBAY_MUX(pin_mode, pin_function) { \
.mode = pin_mode, \
.name = pin_function, \
}
struct thunderbay_pin_soc {
const struct pinctrl_pin_desc *pins;
unsigned int npins;
};
/**
* struct thunderbay_pinctrl - Intel Thunderbay pinctrl structure
* @pctrl: Pointer to the pin controller device
* @base0: First register base address
* @dev: Pointer to the device structure
* @chip: GPIO chip used by this pin controller
* @soc: Pin control configuration data based on SoC
* @ngroups: Number of pin groups available
* @nfuncs: Number of pin functions available
*/
struct thunderbay_pinctrl {
struct pinctrl_dev *pctrl;
void __iomem *base0;
struct device *dev;
struct gpio_chip chip;
const struct thunderbay_pin_soc *soc;
unsigned int ngroups;
unsigned int nfuncs;
};
static const struct pinctrl_pin_desc thunderbay_pins[] = {
THUNDERBAY_PIN_DESC(0, "GPIO0",
THUNDERBAY_MUX(0X0, "I2C0_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(1, "GPIO1",
THUNDERBAY_MUX(0X0, "I2C0_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(2, "GPIO2",
THUNDERBAY_MUX(0X0, "I2C1_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(3, "GPIO3",
THUNDERBAY_MUX(0X0, "I2C1_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(4, "GPIO4",
THUNDERBAY_MUX(0X0, "I2C2_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(5, "GPIO5",
THUNDERBAY_MUX(0X0, "I2C2_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(6, "GPIO6",
THUNDERBAY_MUX(0X0, "I2C3_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(7, "GPIO7",
THUNDERBAY_MUX(0X0, "I2C3_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(8, "GPIO8",
THUNDERBAY_MUX(0X0, "I2C4_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(9, "GPIO9",
THUNDERBAY_MUX(0X0, "I2C4_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(10, "GPIO10",
THUNDERBAY_MUX(0X0, "UART0_M0"),
THUNDERBAY_MUX(0X1, "RT0_DSU_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(11, "GPIO11",
THUNDERBAY_MUX(0X0, "UART0_M0"),
THUNDERBAY_MUX(0X1, "RT0_DSU_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(12, "GPIO12",
THUNDERBAY_MUX(0X0, "UART0_M0"),
THUNDERBAY_MUX(0X1, "RT1_DSU_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(13, "GPIO13",
THUNDERBAY_MUX(0X0, "UART0_M0"),
THUNDERBAY_MUX(0X1, "RT1_DSU_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(14, "GPIO14",
THUNDERBAY_MUX(0X0, "UART1_M0"),
THUNDERBAY_MUX(0X1, "RT2_DSU_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "TRIGGER_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(15, "GPIO15",
THUNDERBAY_MUX(0X0, "UART1_M0"),
THUNDERBAY_MUX(0X1, "RT2_DSU_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "TRIGGER_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(16, "GPIO16",
THUNDERBAY_MUX(0X0, "UART1_M0"),
THUNDERBAY_MUX(0X1, "RT3_DSU_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(17, "GPIO17",
THUNDERBAY_MUX(0X0, "UART1_M0"),
THUNDERBAY_MUX(0X1, "RT3_DSU_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(18, "GPIO18",
THUNDERBAY_MUX(0X0, "SPI0_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(19, "GPIO19",
THUNDERBAY_MUX(0X0, "SPI0_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(20, "GPIO20",
THUNDERBAY_MUX(0X0, "SPI0_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "TPIU_TRACE_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(21, "GPIO21",
THUNDERBAY_MUX(0X0, "SPI0_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "TPIU_TRACE_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(22, "GPIO22",
THUNDERBAY_MUX(0X0, "SPI1_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M0"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(23, "GPIO23",
THUNDERBAY_MUX(0X0, "SPI1_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(24, "GPIO24",
THUNDERBAY_MUX(0X0, "SPI1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_TRACE_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(25, "GPIO25",
THUNDERBAY_MUX(0X0, "SPI1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_TRACE_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(26, "GPIO26",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(27, "GPIO27",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(28, "GPIO28",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(29, "GPIO29",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(30, "GPIO30",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(31, "GPIO31",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(32, "GPIO32",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(33, "GPIO33",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(34, "GPIO34",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DIG_VIEW_0"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(35, "GPIO35",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DIG_VIEW_1"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(36, "GPIO36",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_0"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(37, "GPIO37",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_1"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(38, "GPIO38",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_2"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(39, "GPIO39",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(40, "GPIO40",
THUNDERBAY_MUX(0X0, "ETHER0_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(41, "GPIO41",
THUNDERBAY_MUX(0X0, "POWER_INTERRUPT_MAX_PLATFORM_POWER_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(42, "GPIO42",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(43, "GPIO43",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(44, "GPIO44",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(45, "GPIO45",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(46, "GPIO46",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(47, "GPIO47",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(48, "GPIO48",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(49, "GPIO49",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DEBUG_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(50, "GPIO50",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DIG_VIEW_0"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(51, "GPIO51",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "DIG_VIEW_1"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(52, "GPIO52",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_0"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(53, "GPIO53",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_1"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(54, "GPIO54",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_2"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(55, "GPIO55",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(56, "GPIO56",
THUNDERBAY_MUX(0X0, "ETHER1_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "POWER_INTERRUPT_ICCMAX_VDDD_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(57, "GPIO57",
THUNDERBAY_MUX(0X0, "POWER_INTERRUPT_ICCMAX_VPU_M0"),
THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"),
THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(58, "GPIO58",
THUNDERBAY_MUX(0X0, "THERMTRIP_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(59, "GPIO59",
THUNDERBAY_MUX(0X0, "THERMTRIP_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(60, "GPIO60",
THUNDERBAY_MUX(0X0, "SMBUS_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(61, "GPIO61",
THUNDERBAY_MUX(0X0, "SMBUS_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "POWER_INTERRUPT_ICCMAX_VDDD_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(62, "GPIO62",
THUNDERBAY_MUX(0X0, "PLATFORM_RESET_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(63, "GPIO63",
THUNDERBAY_MUX(0X0, "PLATFORM_RESET_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(64, "GPIO64",
THUNDERBAY_MUX(0X0, "PLATFORM_SHUTDOWN_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(65, "GPIO65",
THUNDERBAY_MUX(0X0, "PLATFORM_SHUTDOWN_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
THUNDERBAY_PIN_DESC(66, "GPIO66",
THUNDERBAY_MUX(0X0, "POWER_INTERRUPT_ICCMAX_MEDIA_M0"),
THUNDERBAY_MUX(0X1, "EMPTY_M1"),
THUNDERBAY_MUX(0X2, "EMPTY_M2"),
THUNDERBAY_MUX(0X3, "EMPTY_M3"),
THUNDERBAY_MUX(0X4, "GPIO_M4")),
};
static const struct thunderbay_pin_soc thunderbay_data = {
.pins = thunderbay_pins,
.npins = ARRAY_SIZE(thunderbay_pins),
};
static u32 thb_gpio_read_reg(struct gpio_chip *chip, unsigned int pinnr)
{
struct thunderbay_pinctrl *tpc = gpiochip_get_data(chip);
return readl(tpc->base0 + THB_GPIO_REG_OFFSET(pinnr));
}
static u32 thb_gpio_write_reg(struct gpio_chip *chip, unsigned int pinnr, u32 value)
{
struct thunderbay_pinctrl *tpc = gpiochip_get_data(chip);
writel(value, (tpc->base0 + THB_GPIO_REG_OFFSET(pinnr)));
return 0;
}
static int thb_read_gpio_data(struct gpio_chip *chip, unsigned int offset, unsigned int pad_dir)
{
int data_offset;
u32 data_reg;
/* as per GPIO Spec = pad_dir 0:input, 1:output */
data_offset = 0x2000u + (offset / 32);
if (!pad_dir)
data_offset += 4;
data_reg = thb_gpio_read_reg(chip, data_offset);
return data_reg & BIT(offset % 32);
}
static int thb_write_gpio_data(struct gpio_chip *chip, unsigned int offset, unsigned int value)
{
int data_offset;
u32 data_reg;
data_offset = 0x2000u + (offset / 32);
data_reg = thb_gpio_read_reg(chip, data_offset);
if (value > 0)
data_reg |= BIT(offset % 32);
else
data_reg &= ~BIT(offset % 32);
return thb_gpio_write_reg(chip, data_offset, data_reg);
}
static int thunderbay_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
{
u32 reg = thb_gpio_read_reg(chip, offset);
/* Return direction only if configured as GPIO else negative error */
if (reg & THB_GPIO_PORT_SELECT_MASK)
return !(reg & THB_GPIO_PAD_DIRECTION_MASK);
return -EINVAL;
}
static int thunderbay_gpio_set_direction_input(struct gpio_chip *chip, unsigned int offset)
{
u32 reg = thb_gpio_read_reg(chip, offset);
/* set pin as input only if it is GPIO else error */
if (reg & THB_GPIO_PORT_SELECT_MASK) {
reg &= (~THB_GPIO_PAD_DIRECTION_MASK);
thb_gpio_write_reg(chip, offset, reg);
return 0;
}
return -EINVAL;
}
static void thunderbay_gpio_set_value(struct gpio_chip *chip, unsigned int offset, int value)
{
u32 reg = thb_gpio_read_reg(chip, offset);
/* update pin value only if it is GPIO-output else error */
if ((reg & THB_GPIO_PORT_SELECT_MASK) && (reg & THB_GPIO_PAD_DIRECTION_MASK))
thb_write_gpio_data(chip, offset, value);
}
static int thunderbay_gpio_set_direction_output(struct gpio_chip *chip,
unsigned int offset, int value)
{
u32 reg = thb_gpio_read_reg(chip, offset);
/* set pin as output only if it is GPIO else error */
if (reg & THB_GPIO_PORT_SELECT_MASK) {
reg |= THB_GPIO_PAD_DIRECTION_MASK;
thb_gpio_write_reg(chip, offset, reg);
thunderbay_gpio_set_value(chip, offset, value);
return 0;
}
return -EINVAL;
}
static int thunderbay_gpio_get_value(struct gpio_chip *chip, unsigned int offset)
{
u32 reg = thb_gpio_read_reg(chip, offset);
int gpio_dir = 0;
/* Read pin value only if it is GPIO else error */
if (reg & THB_GPIO_PORT_SELECT_MASK) {
/* 0=in, 1=out */
gpio_dir = (reg & THB_GPIO_PAD_DIRECTION_MASK) > 0;
/* Returns negative value when pin is configured as PORT */
return thb_read_gpio_data(chip, offset, gpio_dir);
}
return -EINVAL;
}
static int thunderbay_gpiochip_probe(struct thunderbay_pinctrl *tpc)
{
struct gpio_chip *chip = &tpc->chip;
int ret;
chip->label = dev_name(tpc->dev);
chip->parent = tpc->dev;
chip->request = gpiochip_generic_request;
chip->free = gpiochip_generic_free;
chip->get_direction = thunderbay_gpio_get_direction;
chip->direction_input = thunderbay_gpio_set_direction_input;
chip->direction_output = thunderbay_gpio_set_direction_output;
chip->get = thunderbay_gpio_get_value;
chip->set = thunderbay_gpio_set_value;
chip->set_config = gpiochip_generic_config;
/* identifies the first GPIO number handled by this chip; or,
* if negative during registration, requests dynamic ID allocation.
* Please pass -1 as base to let gpiolib select the chip base in all possible cases.
* We want to get rid of the static GPIO number space in the long run.
*/
chip->base = -1;
/* Number of GPIOs handled by this controller; the last GPIO handled is (base + ngpio - 1)*/
chip->ngpio = THB_MAX_NPINS_SUPPORTED;
/* Register/add Thunder Bay GPIO chip with Linux framework */
ret = gpiochip_add_data(chip, tpc);
if (ret)
dev_err(tpc->dev, "Failed to add gpiochip\n");
return ret;
}
static int thunderbay_request_gpio(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned int pin)
{
struct thunderbay_pinctrl *tpc = pinctrl_dev_get_drvdata(pctldev);
struct gpio_chip *chip = &tpc->chip;
u32 reg = 0;
if (thb_pinx_status[pin] == 0u) {
reg = thb_gpio_read_reg(chip, pin);
/* Updates PIN configuration as GPIO and sets GPIO to MODE-4*/
reg |= (THB_GPIO_PORT_SELECT_MASK | THB_GPIO_PINMUX_MODE_4);
thb_gpio_write_reg(chip, pin, reg);
/* update pin status as busy */
thb_pinx_status[pin] = 1u;
return 0;
}
return -EINVAL;
}
static void thunderbay_free_gpio(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned int pin)
{
struct thunderbay_pinctrl *tpc = pinctrl_dev_get_drvdata(pctldev);
struct gpio_chip *chip = &tpc->chip;
u32 reg = 0;
if (thb_pinx_status[pin] == 1u) {
reg = thb_gpio_read_reg(chip, pin);
/* Updates PIN configuration from GPIO to PORT */
reg &= (~THB_GPIO_PORT_SELECT_MASK);
/* Change Port/gpio mode to default mode-0 */
reg &= (~THB_GPIO_PINMUX_MODE_4);
thb_gpio_write_reg(chip, pin, reg);
/* update pin status as free */
thb_pinx_status[pin] = 0u;
}
}
static int thb_pinctrl_set_mux(struct pinctrl_dev *pctldev,
unsigned int func_select, unsigned int group_select)
{
struct thunderbay_pinctrl *tpc = pinctrl_dev_get_drvdata(pctldev);
struct gpio_chip *chip = &tpc->chip;
struct function_desc *function;
unsigned int i, pin_mode;
struct group_desc *group;
int ret = -EINVAL;
u32 reg = 0u;
group = pinctrl_generic_get_group(pctldev, group_select);
if (!group)
return -EINVAL;
function = pinmux_generic_get_function(pctldev, func_select);
if (!function)
return -EINVAL;
pin_mode = *(unsigned int *)(function->data);
/* Change modes for pins in the selected group */
for (i = 0; i < group->num_pins; i++) {
reg = thb_gpio_read_reg(chip, group->pins[i]);
switch (pin_mode) {
case 0u:
reg |= THB_GPIO_PINMUX_MODE_0;
break;
case 1u:
reg |= THB_GPIO_PINMUX_MODE_1;
break;
case 2u:
reg |= THB_GPIO_PINMUX_MODE_2;
break;
case 3u:
reg |= THB_GPIO_PINMUX_MODE_3;
break;
case 4u:
reg |= THB_GPIO_PINMUX_MODE_4;
break;
default:
return -EINVAL;
}
ret = thb_gpio_write_reg(chip, group->pins[i], reg);
if (~ret) {
/* update pin status as busy */
thb_pinx_status[group->pins[i]] = 1u;
}
}
return ret;
}
static int thunderbay_build_groups(struct thunderbay_pinctrl *tpc)
{
struct group_desc *thunderbay_groups;
int i;
tpc->ngroups = tpc->soc->npins;
thunderbay_groups = devm_kcalloc(tpc->dev, tpc->ngroups,
sizeof(*thunderbay_groups), GFP_KERNEL);
if (!thunderbay_groups)
return -ENOMEM;
for (i = 0; i < tpc->ngroups; i++) {
struct group_desc *group = thunderbay_groups + i;
const struct pinctrl_pin_desc *pin_info = thunderbay_pins + i;
group->name = pin_info->name;
group->pins = (int *)&pin_info->number;
pinctrl_generic_add_group(tpc->pctrl, group->name,
group->pins, 1, NULL);
}
return 0;
}
static int thunderbay_add_functions(struct thunderbay_pinctrl *tpc, struct function_desc *funcs)
{
int i;
/* Assign the groups for each function */
for (i = 0; i < tpc->nfuncs; i++) {
struct function_desc *func = &funcs[i];
const char **group_names;
unsigned int grp_idx = 0;
int j;
group_names = devm_kcalloc(tpc->dev, func->num_group_names,
sizeof(*group_names), GFP_KERNEL);
if (!group_names)
return -ENOMEM;
for (j = 0; j < tpc->soc->npins; j++) {
const struct pinctrl_pin_desc *pin_info = &thunderbay_pins[j];
struct thunderbay_mux_desc *pin_mux;
for (pin_mux = pin_info->drv_data; pin_mux->name; pin_mux++) {
if (!strcmp(pin_mux->name, func->name))
group_names[grp_idx++] = pin_info->name;
}
}
func->group_names = group_names;
}
/* Add all functions */
for (i = 0; i < tpc->nfuncs; i++) {
pinmux_generic_add_function(tpc->pctrl,
funcs[i].name,
funcs[i].group_names,
funcs[i].num_group_names,
funcs[i].data);
}
kfree(funcs);
return 0;
}
static int thunderbay_build_functions(struct thunderbay_pinctrl *tpc)
{
struct function_desc *thunderbay_funcs;
void *ptr;
int pin;
/*
* Allocate maximum possible number of functions. Assume every pin
* being part of 8 (hw maximum) globally unique muxes.
*/
tpc->nfuncs = 0;
thunderbay_funcs = kcalloc(tpc->soc->npins * 8,
sizeof(*thunderbay_funcs), GFP_KERNEL);
if (!thunderbay_funcs)
return -ENOMEM;
/* Setup 1 function for each unique mux */
for (pin = 0; pin < tpc->soc->npins; pin++) {
const struct pinctrl_pin_desc *pin_info = thunderbay_pins + pin;
struct thunderbay_mux_desc *pin_mux;
for (pin_mux = pin_info->drv_data; pin_mux->name; pin_mux++) {
struct function_desc *func;
/* Check if we already have function for this mux */
for (func = thunderbay_funcs; func->name; func++) {
if (!strcmp(pin_mux->name, func->name)) {
func->num_group_names++;
break;
}
}
if (!func->name) {
func->name = pin_mux->name;
func->num_group_names = 1;
func->data = (int *)&pin_mux->mode;
tpc->nfuncs++;
}
}
}
/* Reallocate memory based on actual number of functions */
ptr = krealloc(thunderbay_funcs,
tpc->nfuncs * sizeof(*thunderbay_funcs), GFP_KERNEL);
if (!ptr)
return -ENOMEM;
thunderbay_funcs = ptr;
return thunderbay_add_functions(tpc, thunderbay_funcs);
}
static int thunderbay_pinconf_set_tristate(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg;
reg = thb_gpio_read_reg(chip, pin);
if (config > 0)
reg |= THB_GPIO_ENAQ_MASK;
else
reg &= ~THB_GPIO_ENAQ_MASK;
return thb_gpio_write_reg(chip, pin, reg);
}
static int thunderbay_pinconf_get_tristate(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 *config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg;
reg = thb_gpio_read_reg(chip, pin);
*config = (reg & THB_GPIO_ENAQ_MASK) > 0;
return 0;
}
static int thunderbay_pinconf_set_pulldown(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg;
reg = thb_gpio_read_reg(chip, pin);
if (config > 0)
reg |= THB_GPIO_PULL_DOWN_MASK;
else
reg &= ~THB_GPIO_PULL_DOWN_MASK;
return thb_gpio_write_reg(chip, pin, reg);
}
static int thunderbay_pinconf_get_pulldown(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 *config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg = 0;
reg = thb_gpio_read_reg(chip, pin);
*config = ((reg & THB_GPIO_PULL_DOWN_MASK) > 0) ? 1 : 0;
return 0;
}
static int thunderbay_pinconf_set_pullup(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg;
reg = thb_gpio_read_reg(chip, pin);
if (config > 0)
reg &= ~THB_GPIO_PULL_UP_MASK;
else
reg |= THB_GPIO_PULL_UP_MASK;
return thb_gpio_write_reg(chip, pin, reg);
}
static int thunderbay_pinconf_get_pullup(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 *config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg;
reg = thb_gpio_read_reg(chip, pin);
*config = ((reg & THB_GPIO_PULL_UP_MASK) == 0) ? 1 : 0;
return 0;
}
static int thunderbay_pinconf_set_opendrain(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg;
reg = thb_gpio_read_reg(chip, pin);
if (config > 0)
reg &= ~THB_GPIO_PULL_ENABLE_MASK;
else
reg |= THB_GPIO_PULL_ENABLE_MASK;
return thb_gpio_write_reg(chip, pin, reg);
}
static int thunderbay_pinconf_get_opendrain(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 *config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg;
reg = thb_gpio_read_reg(chip, pin);
*config = ((reg & THB_GPIO_PULL_ENABLE_MASK) == 0) ? 1 : 0;
return 0;
}
static int thunderbay_pinconf_set_pushpull(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg;
reg = thb_gpio_read_reg(chip, pin);
if (config > 0)
reg |= THB_GPIO_PULL_ENABLE_MASK;
else
reg &= ~THB_GPIO_PULL_ENABLE_MASK;
return thb_gpio_write_reg(chip, pin, reg);
}
static int thunderbay_pinconf_get_pushpull(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 *config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg;
reg = thb_gpio_read_reg(chip, pin);
*config = ((reg & THB_GPIO_PULL_ENABLE_MASK) > 0) ? 1 : 0;
return 0;
}
static int thunderbay_pinconf_set_drivestrength(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg;
reg = thb_gpio_read_reg(chip, pin);
/* Drive Strength: 0x0 to 0xF */
if (config <= 0xF) {
reg = (reg | config);
return thb_gpio_write_reg(chip, pin, reg);
}
return -EINVAL;
}
static int thunderbay_pinconf_get_drivestrength(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 *config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg;
reg = thb_gpio_read_reg(chip, pin);
reg = (reg & THB_GPIO_DRIVE_STRENGTH_MASK) >> 16;
*config = (reg > 0) ? reg : 0;
return 0;
}
static int thunderbay_pinconf_set_schmitt(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg;
reg = thb_gpio_read_reg(chip, pin);
if (config > 0)
reg |= THB_GPIO_SCHMITT_TRIGGER_MASK;
else
reg &= ~THB_GPIO_SCHMITT_TRIGGER_MASK;
return thb_gpio_write_reg(chip, pin, reg);
}
static int thunderbay_pinconf_get_schmitt(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 *config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg;
reg = thb_gpio_read_reg(chip, pin);
*config = ((reg & THB_GPIO_SCHMITT_TRIGGER_MASK) > 0) ? 1 : 0;
return 0;
}
static int thunderbay_pinconf_set_slew_rate(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg = 0;
reg = thb_gpio_read_reg(chip, pin);
if (config > 0)
reg |= THB_GPIO_SLEW_RATE_MASK;
else
reg &= ~THB_GPIO_SLEW_RATE_MASK;
return thb_gpio_write_reg(chip, pin, reg);
}
static int thunderbay_pinconf_get_slew_rate(struct thunderbay_pinctrl *tpc,
unsigned int pin, u32 *config)
{
struct gpio_chip *chip = &tpc->chip;
u32 reg;
reg = thb_gpio_read_reg(chip, pin);
*config = ((reg & THB_GPIO_SLEW_RATE_MASK) > 0) ? 1 : 0;
return 0;
}
static int thunderbay_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long *config)
{
struct thunderbay_pinctrl *tpc = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param = pinconf_to_config_param(*config);
u32 arg;
int ret;
switch (param) {
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
ret = thunderbay_pinconf_get_tristate(tpc, pin, &arg);
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
ret = thunderbay_pinconf_get_pulldown(tpc, pin, &arg);
break;
case PIN_CONFIG_BIAS_PULL_UP:
ret = thunderbay_pinconf_get_pullup(tpc, pin, &arg);
break;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
ret = thunderbay_pinconf_get_opendrain(tpc, pin, &arg);
break;
case PIN_CONFIG_DRIVE_PUSH_PULL:
ret = thunderbay_pinconf_get_pushpull(tpc, pin, &arg);
break;
case PIN_CONFIG_DRIVE_STRENGTH:
ret = thunderbay_pinconf_get_drivestrength(tpc, pin, &arg);
break;
case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
ret = thunderbay_pinconf_get_schmitt(tpc, pin, &arg);
break;
case PIN_CONFIG_SLEW_RATE:
ret = thunderbay_pinconf_get_slew_rate(tpc, pin, &arg);
break;
default:
return -ENOTSUPP;
}
*config = pinconf_to_config_packed(param, arg);
return ret;
}
static int thunderbay_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long *configs, unsigned int num_configs)
{
struct thunderbay_pinctrl *tpc = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param;
unsigned int pinconf;
int ret = 0;
u32 arg;
for (pinconf = 0; pinconf < num_configs; pinconf++) {
param = pinconf_to_config_param(configs[pinconf]);
arg = pinconf_to_config_argument(configs[pinconf]);
switch (param) {
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
ret = thunderbay_pinconf_set_tristate(tpc, pin, arg);
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
ret = thunderbay_pinconf_set_pulldown(tpc, pin, arg);
break;
case PIN_CONFIG_BIAS_PULL_UP:
ret = thunderbay_pinconf_set_pullup(tpc, pin, arg);
break;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
ret = thunderbay_pinconf_set_opendrain(tpc, pin, arg);
break;
case PIN_CONFIG_DRIVE_PUSH_PULL:
ret = thunderbay_pinconf_set_pushpull(tpc, pin, arg);
break;
case PIN_CONFIG_DRIVE_STRENGTH:
ret = thunderbay_pinconf_set_drivestrength(tpc, pin, arg);
break;
case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
ret = thunderbay_pinconf_set_schmitt(tpc, pin, arg);
break;
case PIN_CONFIG_SLEW_RATE:
ret = thunderbay_pinconf_set_slew_rate(tpc, pin, arg);
break;
default:
return -ENOTSUPP;
}
}
return ret;
}
static const struct pinctrl_ops thunderbay_pctlops = {
.get_groups_count = pinctrl_generic_get_group_count,
.get_group_name = pinctrl_generic_get_group_name,
.get_group_pins = pinctrl_generic_get_group_pins,
.dt_node_to_map = pinconf_generic_dt_node_to_map_all,
.dt_free_map = pinconf_generic_dt_free_map,
};
static const struct pinmux_ops thunderbay_pmxops = {
.get_functions_count = pinmux_generic_get_function_count,
.get_function_name = pinmux_generic_get_function_name,
.get_function_groups = pinmux_generic_get_function_groups,
.set_mux = thb_pinctrl_set_mux,
.gpio_request_enable = thunderbay_request_gpio,
.gpio_disable_free = thunderbay_free_gpio,
};
static const struct pinconf_ops thunderbay_confops = {
.is_generic = true,
.pin_config_get = thunderbay_pinconf_get,
.pin_config_set = thunderbay_pinconf_set,
};
static struct pinctrl_desc thunderbay_pinctrl_desc = {
.name = "thunderbay-pinmux",
.pctlops = &thunderbay_pctlops,
.pmxops = &thunderbay_pmxops,
.confops = &thunderbay_confops,
.owner = THIS_MODULE,
};
static const struct of_device_id thunderbay_pinctrl_match[] = {
{
.compatible = "intel,thunderbay-pinctrl",
.data = &thunderbay_data
},
{}
};
static int thunderbay_pinctrl_probe(struct platform_device *pdev)
{
const struct of_device_id *of_id;
struct device *dev = &pdev->dev;
struct thunderbay_pinctrl *tpc;
int ret;
of_id = of_match_node(thunderbay_pinctrl_match, pdev->dev.of_node);
if (!of_id)
return -ENODEV;
tpc = devm_kzalloc(dev, sizeof(*tpc), GFP_KERNEL);
if (!tpc)
return -ENOMEM;
tpc->dev = dev;
tpc->soc = of_id->data;
tpc->base0 = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(tpc->base0))
return PTR_ERR(tpc->base0);
thunderbay_pinctrl_desc.pins = tpc->soc->pins;
thunderbay_pinctrl_desc.npins = tpc->soc->npins;
/* Register pinctrl */
tpc->pctrl = devm_pinctrl_register(dev, &thunderbay_pinctrl_desc, tpc);
if (IS_ERR(tpc->pctrl))
return PTR_ERR(tpc->pctrl);
/* Setup pinmux groups */
ret = thunderbay_build_groups(tpc);
if (ret)
return ret;
/* Setup pinmux functions */
ret = thunderbay_build_functions(tpc);
if (ret)
return ret;
/* Setup GPIO */
ret = thunderbay_gpiochip_probe(tpc);
if (ret < 0)
return ret;
platform_set_drvdata(pdev, tpc);
return 0;
}
static int thunderbay_pinctrl_remove(struct platform_device *pdev)
{
/* thunderbay_pinctrl_remove function to clear the assigned memory */
return 0;
}
static struct platform_driver thunderbay_pinctrl_driver = {
.driver = {
.name = "thunderbay-pinctrl",
.of_match_table = thunderbay_pinctrl_match,
},
.probe = thunderbay_pinctrl_probe,
.remove = thunderbay_pinctrl_remove,
};
builtin_platform_driver(thunderbay_pinctrl_driver);
MODULE_AUTHOR("Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>");
MODULE_AUTHOR("Kiran Kumar S <kiran.kumar1.s@intel.com>");
MODULE_DESCRIPTION("Intel Thunder Bay Pinctrl/GPIO Driver");
MODULE_LICENSE("GPL v2");
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