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linux/drivers/pinctrl/pinctrl-thunderbay.c
Lakshmi Sowjanya D 12422af819 pinctrl: Add Intel Thunder Bay pinctrl driver 
About Intel Thunder Bay:
-----------------------
Intel Thunder Bay is a computer vision AI accelerator SoC based on ARM CPU.

Pinctrl IP:
----------
The SoC has a customised pinmux controller IP which controls pin
multiplexing and configuration.

Thunder Bay pinctrl IP is not based on and have nothing in common with the
existing pinctrl drivers. The registers used are incompatible with the
existing drivers, so it requires a new driver.

Add pinctrl driver to enable pin control support in the Intel Thunder Bay
SoC.

Co-developed-by: Kiran Kumar S <kiran.kumar1.s@intel.com>
Signed-off-by: Kiran Kumar S <kiran.kumar1.s@intel.com>
Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
Link: https://lore.kernel.org/r/20211201072626.19599-3-lakshmi.sowjanya.d@intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2021-12-09 03:17:39 +01:00

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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)
{
struct function_desc *function = funcs;
int i;
/* Assign the groups for each function */
for (i = 0; i < tpc->soc->npins; i++) {
const struct pinctrl_pin_desc *pin_info = thunderbay_pins + i;
struct thunderbay_mux_desc *pin_mux = pin_info->drv_data;
while (pin_mux->name) {
const char **grp;
int j, grp_num, match = 0;
size_t grp_size;
struct function_desc *func;
for (j = 0; j < tpc->nfuncs; j++) {
if (!strcmp(pin_mux->name, function[j].name)) {
match = 1;
break;
}
}
if (!match)
return -EINVAL;
func = function + j;
grp_num = func->num_group_names;
grp_size = sizeof(*func->group_names);
if (!func->group_names) {
func->group_names = devm_kcalloc(tpc->dev,
grp_num,
grp_size,
GFP_KERNEL);
if (!func->group_names) {
kfree(func);
return -ENOMEM;
}
}
grp = func->group_names;
while (*grp)
grp++;
*grp = pin_info->name;
pin_mux++;
}
}
/* Add all functions */
for (i = 0; i < tpc->nfuncs; i++) {
pinmux_generic_add_function(tpc->pctrl,
function[i].name,
function[i].group_names,
function[i].num_group_names,
function[i].data);
}
kfree(function);
return 0;
}
static int thunderbay_build_functions(struct thunderbay_pinctrl *tpc)
{
struct function_desc *thunderbay_funcs;
void *ptr;
int pin;
/* Total number of functions is unknown at this point. Allocate first. */
tpc->nfuncs = 0;
thunderbay_funcs = kcalloc(tpc->soc->npins * 8,
sizeof(*thunderbay_funcs), GFP_KERNEL);
if (!thunderbay_funcs)
return -ENOMEM;
/* Find total number of functions and each's properties */
for (pin = 0; pin < tpc->soc->npins; pin++) {
const struct pinctrl_pin_desc *pin_info = thunderbay_pins + pin;
struct thunderbay_mux_desc *pin_mux = pin_info->drv_data;
while (pin_mux->name) {
struct function_desc *func = thunderbay_funcs;
while (func->name) {
if (!strcmp(pin_mux->name, func->name)) {
func->num_group_names++;
break;
}
func++;
}
if (!func->name) {
func->name = pin_mux->name;
func->num_group_names = 1;
func->data = (int *)&pin_mux->mode;
tpc->nfuncs++;
}
pin_mux++;
}
}
/* 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;
struct resource *iomem;
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;
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!iomem)
return -ENXIO;
tpc->base0 = devm_ioremap_resource(dev, iomem);
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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