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linux/drivers/pinctrl/pinctrl-tb10x.c
Uwe Kleine-König 14a16555e7 pinctrl: tb10x: Convert to platform remove callback returning void 
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20231009083856.222030-15-u.kleine-koenig@pengutronix.de
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2023-10-10 15:42:07 +02:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Abilis Systems TB10x pin control driver
*
* Copyright (C) Abilis Systems 2012
*
* Author: Christian Ruppert <christian.ruppert@abilis.com>
*/
#include <linux/stringify.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/machine.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/slab.h>
#include "pinctrl-utils.h"
#define TB10X_PORT1 (0)
#define TB10X_PORT2 (16)
#define TB10X_PORT3 (32)
#define TB10X_PORT4 (48)
#define TB10X_PORT5 (128)
#define TB10X_PORT6 (64)
#define TB10X_PORT7 (80)
#define TB10X_PORT8 (96)
#define TB10X_PORT9 (112)
#define TB10X_GPIOS (256)
#define PCFG_PORT_BITWIDTH (2)
#define PCFG_PORT_MASK(PORT) \
(((1 << PCFG_PORT_BITWIDTH) - 1) << (PCFG_PORT_BITWIDTH * (PORT)))
static const struct pinctrl_pin_desc tb10x_pins[] = {
/* Port 1 */
PINCTRL_PIN(TB10X_PORT1 + 0, "MICLK_S0"),
PINCTRL_PIN(TB10X_PORT1 + 1, "MISTRT_S0"),
PINCTRL_PIN(TB10X_PORT1 + 2, "MIVAL_S0"),
PINCTRL_PIN(TB10X_PORT1 + 3, "MDI_S0"),
PINCTRL_PIN(TB10X_PORT1 + 4, "GPIOA0"),
PINCTRL_PIN(TB10X_PORT1 + 5, "GPIOA1"),
PINCTRL_PIN(TB10X_PORT1 + 6, "GPIOA2"),
PINCTRL_PIN(TB10X_PORT1 + 7, "MDI_S1"),
PINCTRL_PIN(TB10X_PORT1 + 8, "MIVAL_S1"),
PINCTRL_PIN(TB10X_PORT1 + 9, "MISTRT_S1"),
PINCTRL_PIN(TB10X_PORT1 + 10, "MICLK_S1"),
/* Port 2 */
PINCTRL_PIN(TB10X_PORT2 + 0, "MICLK_S2"),
PINCTRL_PIN(TB10X_PORT2 + 1, "MISTRT_S2"),
PINCTRL_PIN(TB10X_PORT2 + 2, "MIVAL_S2"),
PINCTRL_PIN(TB10X_PORT2 + 3, "MDI_S2"),
PINCTRL_PIN(TB10X_PORT2 + 4, "GPIOC0"),
PINCTRL_PIN(TB10X_PORT2 + 5, "GPIOC1"),
PINCTRL_PIN(TB10X_PORT2 + 6, "GPIOC2"),
PINCTRL_PIN(TB10X_PORT2 + 7, "MDI_S3"),
PINCTRL_PIN(TB10X_PORT2 + 8, "MIVAL_S3"),
PINCTRL_PIN(TB10X_PORT2 + 9, "MISTRT_S3"),
PINCTRL_PIN(TB10X_PORT2 + 10, "MICLK_S3"),
/* Port 3 */
PINCTRL_PIN(TB10X_PORT3 + 0, "MICLK_S4"),
PINCTRL_PIN(TB10X_PORT3 + 1, "MISTRT_S4"),
PINCTRL_PIN(TB10X_PORT3 + 2, "MIVAL_S4"),
PINCTRL_PIN(TB10X_PORT3 + 3, "MDI_S4"),
PINCTRL_PIN(TB10X_PORT3 + 4, "GPIOE0"),
PINCTRL_PIN(TB10X_PORT3 + 5, "GPIOE1"),
PINCTRL_PIN(TB10X_PORT3 + 6, "GPIOE2"),
PINCTRL_PIN(TB10X_PORT3 + 7, "MDI_S5"),
PINCTRL_PIN(TB10X_PORT3 + 8, "MIVAL_S5"),
PINCTRL_PIN(TB10X_PORT3 + 9, "MISTRT_S5"),
PINCTRL_PIN(TB10X_PORT3 + 10, "MICLK_S5"),
/* Port 4 */
PINCTRL_PIN(TB10X_PORT4 + 0, "MICLK_S6"),
PINCTRL_PIN(TB10X_PORT4 + 1, "MISTRT_S6"),
PINCTRL_PIN(TB10X_PORT4 + 2, "MIVAL_S6"),
PINCTRL_PIN(TB10X_PORT4 + 3, "MDI_S6"),
PINCTRL_PIN(TB10X_PORT4 + 4, "GPIOG0"),
PINCTRL_PIN(TB10X_PORT4 + 5, "GPIOG1"),
PINCTRL_PIN(TB10X_PORT4 + 6, "GPIOG2"),
PINCTRL_PIN(TB10X_PORT4 + 7, "MDI_S7"),
PINCTRL_PIN(TB10X_PORT4 + 8, "MIVAL_S7"),
PINCTRL_PIN(TB10X_PORT4 + 9, "MISTRT_S7"),
PINCTRL_PIN(TB10X_PORT4 + 10, "MICLK_S7"),
/* Port 5 */
PINCTRL_PIN(TB10X_PORT5 + 0, "PC_CE1N"),
PINCTRL_PIN(TB10X_PORT5 + 1, "PC_CE2N"),
PINCTRL_PIN(TB10X_PORT5 + 2, "PC_REGN"),
PINCTRL_PIN(TB10X_PORT5 + 3, "PC_INPACKN"),
PINCTRL_PIN(TB10X_PORT5 + 4, "PC_OEN"),
PINCTRL_PIN(TB10X_PORT5 + 5, "PC_WEN"),
PINCTRL_PIN(TB10X_PORT5 + 6, "PC_IORDN"),
PINCTRL_PIN(TB10X_PORT5 + 7, "PC_IOWRN"),
PINCTRL_PIN(TB10X_PORT5 + 8, "PC_RDYIRQN"),
PINCTRL_PIN(TB10X_PORT5 + 9, "PC_WAITN"),
PINCTRL_PIN(TB10X_PORT5 + 10, "PC_A0"),
PINCTRL_PIN(TB10X_PORT5 + 11, "PC_A1"),
PINCTRL_PIN(TB10X_PORT5 + 12, "PC_A2"),
PINCTRL_PIN(TB10X_PORT5 + 13, "PC_A3"),
PINCTRL_PIN(TB10X_PORT5 + 14, "PC_A4"),
PINCTRL_PIN(TB10X_PORT5 + 15, "PC_A5"),
PINCTRL_PIN(TB10X_PORT5 + 16, "PC_A6"),
PINCTRL_PIN(TB10X_PORT5 + 17, "PC_A7"),
PINCTRL_PIN(TB10X_PORT5 + 18, "PC_A8"),
PINCTRL_PIN(TB10X_PORT5 + 19, "PC_A9"),
PINCTRL_PIN(TB10X_PORT5 + 20, "PC_A10"),
PINCTRL_PIN(TB10X_PORT5 + 21, "PC_A11"),
PINCTRL_PIN(TB10X_PORT5 + 22, "PC_A12"),
PINCTRL_PIN(TB10X_PORT5 + 23, "PC_A13"),
PINCTRL_PIN(TB10X_PORT5 + 24, "PC_A14"),
PINCTRL_PIN(TB10X_PORT5 + 25, "PC_D0"),
PINCTRL_PIN(TB10X_PORT5 + 26, "PC_D1"),
PINCTRL_PIN(TB10X_PORT5 + 27, "PC_D2"),
PINCTRL_PIN(TB10X_PORT5 + 28, "PC_D3"),
PINCTRL_PIN(TB10X_PORT5 + 29, "PC_D4"),
PINCTRL_PIN(TB10X_PORT5 + 30, "PC_D5"),
PINCTRL_PIN(TB10X_PORT5 + 31, "PC_D6"),
PINCTRL_PIN(TB10X_PORT5 + 32, "PC_D7"),
PINCTRL_PIN(TB10X_PORT5 + 33, "PC_MOSTRT"),
PINCTRL_PIN(TB10X_PORT5 + 34, "PC_MOVAL"),
PINCTRL_PIN(TB10X_PORT5 + 35, "PC_MDO0"),
PINCTRL_PIN(TB10X_PORT5 + 36, "PC_MDO1"),
PINCTRL_PIN(TB10X_PORT5 + 37, "PC_MDO2"),
PINCTRL_PIN(TB10X_PORT5 + 38, "PC_MDO3"),
PINCTRL_PIN(TB10X_PORT5 + 39, "PC_MDO4"),
PINCTRL_PIN(TB10X_PORT5 + 40, "PC_MDO5"),
PINCTRL_PIN(TB10X_PORT5 + 41, "PC_MDO6"),
PINCTRL_PIN(TB10X_PORT5 + 42, "PC_MDO7"),
PINCTRL_PIN(TB10X_PORT5 + 43, "PC_MISTRT"),
PINCTRL_PIN(TB10X_PORT5 + 44, "PC_MIVAL"),
PINCTRL_PIN(TB10X_PORT5 + 45, "PC_MDI0"),
PINCTRL_PIN(TB10X_PORT5 + 46, "PC_MDI1"),
PINCTRL_PIN(TB10X_PORT5 + 47, "PC_MDI2"),
PINCTRL_PIN(TB10X_PORT5 + 48, "PC_MDI3"),
PINCTRL_PIN(TB10X_PORT5 + 49, "PC_MDI4"),
PINCTRL_PIN(TB10X_PORT5 + 50, "PC_MDI5"),
PINCTRL_PIN(TB10X_PORT5 + 51, "PC_MDI6"),
PINCTRL_PIN(TB10X_PORT5 + 52, "PC_MDI7"),
PINCTRL_PIN(TB10X_PORT5 + 53, "PC_MICLK"),
/* Port 6 */
PINCTRL_PIN(TB10X_PORT6 + 0, "T_MOSTRT_S0"),
PINCTRL_PIN(TB10X_PORT6 + 1, "T_MOVAL_S0"),
PINCTRL_PIN(TB10X_PORT6 + 2, "T_MDO_S0"),
PINCTRL_PIN(TB10X_PORT6 + 3, "T_MOSTRT_S1"),
PINCTRL_PIN(TB10X_PORT6 + 4, "T_MOVAL_S1"),
PINCTRL_PIN(TB10X_PORT6 + 5, "T_MDO_S1"),
PINCTRL_PIN(TB10X_PORT6 + 6, "T_MOSTRT_S2"),
PINCTRL_PIN(TB10X_PORT6 + 7, "T_MOVAL_S2"),
PINCTRL_PIN(TB10X_PORT6 + 8, "T_MDO_S2"),
PINCTRL_PIN(TB10X_PORT6 + 9, "T_MOSTRT_S3"),
/* Port 7 */
PINCTRL_PIN(TB10X_PORT7 + 0, "UART0_TXD"),
PINCTRL_PIN(TB10X_PORT7 + 1, "UART0_RXD"),
PINCTRL_PIN(TB10X_PORT7 + 2, "UART0_CTS"),
PINCTRL_PIN(TB10X_PORT7 + 3, "UART0_RTS"),
PINCTRL_PIN(TB10X_PORT7 + 4, "UART1_TXD"),
PINCTRL_PIN(TB10X_PORT7 + 5, "UART1_RXD"),
PINCTRL_PIN(TB10X_PORT7 + 6, "UART1_CTS"),
PINCTRL_PIN(TB10X_PORT7 + 7, "UART1_RTS"),
/* Port 8 */
PINCTRL_PIN(TB10X_PORT8 + 0, "SPI3_CLK"),
PINCTRL_PIN(TB10X_PORT8 + 1, "SPI3_MISO"),
PINCTRL_PIN(TB10X_PORT8 + 2, "SPI3_MOSI"),
PINCTRL_PIN(TB10X_PORT8 + 3, "SPI3_SSN"),
/* Port 9 */
PINCTRL_PIN(TB10X_PORT9 + 0, "SPI1_CLK"),
PINCTRL_PIN(TB10X_PORT9 + 1, "SPI1_MISO"),
PINCTRL_PIN(TB10X_PORT9 + 2, "SPI1_MOSI"),
PINCTRL_PIN(TB10X_PORT9 + 3, "SPI1_SSN0"),
PINCTRL_PIN(TB10X_PORT9 + 4, "SPI1_SSN1"),
/* Unmuxed GPIOs */
PINCTRL_PIN(TB10X_GPIOS + 0, "GPIOB0"),
PINCTRL_PIN(TB10X_GPIOS + 1, "GPIOB1"),
PINCTRL_PIN(TB10X_GPIOS + 2, "GPIOD0"),
PINCTRL_PIN(TB10X_GPIOS + 3, "GPIOD1"),
PINCTRL_PIN(TB10X_GPIOS + 4, "GPIOF0"),
PINCTRL_PIN(TB10X_GPIOS + 5, "GPIOF1"),
PINCTRL_PIN(TB10X_GPIOS + 6, "GPIOH0"),
PINCTRL_PIN(TB10X_GPIOS + 7, "GPIOH1"),
PINCTRL_PIN(TB10X_GPIOS + 8, "GPIOI0"),
PINCTRL_PIN(TB10X_GPIOS + 9, "GPIOI1"),
PINCTRL_PIN(TB10X_GPIOS + 10, "GPIOI2"),
PINCTRL_PIN(TB10X_GPIOS + 11, "GPIOI3"),
PINCTRL_PIN(TB10X_GPIOS + 12, "GPIOI4"),
PINCTRL_PIN(TB10X_GPIOS + 13, "GPIOI5"),
PINCTRL_PIN(TB10X_GPIOS + 14, "GPIOI6"),
PINCTRL_PIN(TB10X_GPIOS + 15, "GPIOI7"),
PINCTRL_PIN(TB10X_GPIOS + 16, "GPIOI8"),
PINCTRL_PIN(TB10X_GPIOS + 17, "GPIOI9"),
PINCTRL_PIN(TB10X_GPIOS + 18, "GPIOI10"),
PINCTRL_PIN(TB10X_GPIOS + 19, "GPIOI11"),
PINCTRL_PIN(TB10X_GPIOS + 20, "GPION0"),
PINCTRL_PIN(TB10X_GPIOS + 21, "GPION1"),
PINCTRL_PIN(TB10X_GPIOS + 22, "GPION2"),
PINCTRL_PIN(TB10X_GPIOS + 23, "GPION3"),
#define MAX_PIN (TB10X_GPIOS + 24)
PINCTRL_PIN(MAX_PIN, "GPION4"),
};
/* Port 1 */
static const unsigned mis0_pins[] = { TB10X_PORT1 + 0, TB10X_PORT1 + 1,
TB10X_PORT1 + 2, TB10X_PORT1 + 3};
static const unsigned gpioa_pins[] = { TB10X_PORT1 + 4, TB10X_PORT1 + 5,
TB10X_PORT1 + 6};
static const unsigned mis1_pins[] = { TB10X_PORT1 + 7, TB10X_PORT1 + 8,
TB10X_PORT1 + 9, TB10X_PORT1 + 10};
static const unsigned mip1_pins[] = { TB10X_PORT1 + 0, TB10X_PORT1 + 1,
TB10X_PORT1 + 2, TB10X_PORT1 + 3,
TB10X_PORT1 + 4, TB10X_PORT1 + 5,
TB10X_PORT1 + 6, TB10X_PORT1 + 7,
TB10X_PORT1 + 8, TB10X_PORT1 + 9,
TB10X_PORT1 + 10};
/* Port 2 */
static const unsigned mis2_pins[] = { TB10X_PORT2 + 0, TB10X_PORT2 + 1,
TB10X_PORT2 + 2, TB10X_PORT2 + 3};
static const unsigned gpioc_pins[] = { TB10X_PORT2 + 4, TB10X_PORT2 + 5,
TB10X_PORT2 + 6};
static const unsigned mis3_pins[] = { TB10X_PORT2 + 7, TB10X_PORT2 + 8,
TB10X_PORT2 + 9, TB10X_PORT2 + 10};
static const unsigned mip3_pins[] = { TB10X_PORT2 + 0, TB10X_PORT2 + 1,
TB10X_PORT2 + 2, TB10X_PORT2 + 3,
TB10X_PORT2 + 4, TB10X_PORT2 + 5,
TB10X_PORT2 + 6, TB10X_PORT2 + 7,
TB10X_PORT2 + 8, TB10X_PORT2 + 9,
TB10X_PORT2 + 10};
/* Port 3 */
static const unsigned mis4_pins[] = { TB10X_PORT3 + 0, TB10X_PORT3 + 1,
TB10X_PORT3 + 2, TB10X_PORT3 + 3};
static const unsigned gpioe_pins[] = { TB10X_PORT3 + 4, TB10X_PORT3 + 5,
TB10X_PORT3 + 6};
static const unsigned mis5_pins[] = { TB10X_PORT3 + 7, TB10X_PORT3 + 8,
TB10X_PORT3 + 9, TB10X_PORT3 + 10};
static const unsigned mip5_pins[] = { TB10X_PORT3 + 0, TB10X_PORT3 + 1,
TB10X_PORT3 + 2, TB10X_PORT3 + 3,
TB10X_PORT3 + 4, TB10X_PORT3 + 5,
TB10X_PORT3 + 6, TB10X_PORT3 + 7,
TB10X_PORT3 + 8, TB10X_PORT3 + 9,
TB10X_PORT3 + 10};
/* Port 4 */
static const unsigned mis6_pins[] = { TB10X_PORT4 + 0, TB10X_PORT4 + 1,
TB10X_PORT4 + 2, TB10X_PORT4 + 3};
static const unsigned gpiog_pins[] = { TB10X_PORT4 + 4, TB10X_PORT4 + 5,
TB10X_PORT4 + 6};
static const unsigned mis7_pins[] = { TB10X_PORT4 + 7, TB10X_PORT4 + 8,
TB10X_PORT4 + 9, TB10X_PORT4 + 10};
static const unsigned mip7_pins[] = { TB10X_PORT4 + 0, TB10X_PORT4 + 1,
TB10X_PORT4 + 2, TB10X_PORT4 + 3,
TB10X_PORT4 + 4, TB10X_PORT4 + 5,
TB10X_PORT4 + 6, TB10X_PORT4 + 7,
TB10X_PORT4 + 8, TB10X_PORT4 + 9,
TB10X_PORT4 + 10};
/* Port 6 */
static const unsigned mop_pins[] = { TB10X_PORT6 + 0, TB10X_PORT6 + 1,
TB10X_PORT6 + 2, TB10X_PORT6 + 3,
TB10X_PORT6 + 4, TB10X_PORT6 + 5,
TB10X_PORT6 + 6, TB10X_PORT6 + 7,
TB10X_PORT6 + 8, TB10X_PORT6 + 9};
static const unsigned mos0_pins[] = { TB10X_PORT6 + 0, TB10X_PORT6 + 1,
TB10X_PORT6 + 2};
static const unsigned mos1_pins[] = { TB10X_PORT6 + 3, TB10X_PORT6 + 4,
TB10X_PORT6 + 5};
static const unsigned mos2_pins[] = { TB10X_PORT6 + 6, TB10X_PORT6 + 7,
TB10X_PORT6 + 8};
static const unsigned mos3_pins[] = { TB10X_PORT6 + 9};
/* Port 7 */
static const unsigned uart0_pins[] = { TB10X_PORT7 + 0, TB10X_PORT7 + 1,
TB10X_PORT7 + 2, TB10X_PORT7 + 3};
static const unsigned uart1_pins[] = { TB10X_PORT7 + 4, TB10X_PORT7 + 5,
TB10X_PORT7 + 6, TB10X_PORT7 + 7};
static const unsigned gpiol_pins[] = { TB10X_PORT7 + 0, TB10X_PORT7 + 1,
TB10X_PORT7 + 2, TB10X_PORT7 + 3};
static const unsigned gpiom_pins[] = { TB10X_PORT7 + 4, TB10X_PORT7 + 5,
TB10X_PORT7 + 6, TB10X_PORT7 + 7};
/* Port 8 */
static const unsigned spi3_pins[] = { TB10X_PORT8 + 0, TB10X_PORT8 + 1,
TB10X_PORT8 + 2, TB10X_PORT8 + 3};
static const unsigned jtag_pins[] = { TB10X_PORT8 + 0, TB10X_PORT8 + 1,
TB10X_PORT8 + 2, TB10X_PORT8 + 3};
/* Port 9 */
static const unsigned spi1_pins[] = { TB10X_PORT9 + 0, TB10X_PORT9 + 1,
TB10X_PORT9 + 2, TB10X_PORT9 + 3,
TB10X_PORT9 + 4};
static const unsigned gpion_pins[] = { TB10X_PORT9 + 0, TB10X_PORT9 + 1,
TB10X_PORT9 + 2, TB10X_PORT9 + 3,
TB10X_PORT9 + 4};
/* Port 5 */
static const unsigned gpioj_pins[] = { TB10X_PORT5 + 0, TB10X_PORT5 + 1,
TB10X_PORT5 + 2, TB10X_PORT5 + 3,
TB10X_PORT5 + 4, TB10X_PORT5 + 5,
TB10X_PORT5 + 6, TB10X_PORT5 + 7,
TB10X_PORT5 + 8, TB10X_PORT5 + 9,
TB10X_PORT5 + 10, TB10X_PORT5 + 11,
TB10X_PORT5 + 12, TB10X_PORT5 + 13,
TB10X_PORT5 + 14, TB10X_PORT5 + 15,
TB10X_PORT5 + 16, TB10X_PORT5 + 17,
TB10X_PORT5 + 18, TB10X_PORT5 + 19,
TB10X_PORT5 + 20, TB10X_PORT5 + 21,
TB10X_PORT5 + 22, TB10X_PORT5 + 23,
TB10X_PORT5 + 24, TB10X_PORT5 + 25,
TB10X_PORT5 + 26, TB10X_PORT5 + 27,
TB10X_PORT5 + 28, TB10X_PORT5 + 29,
TB10X_PORT5 + 30, TB10X_PORT5 + 31};
static const unsigned gpiok_pins[] = { TB10X_PORT5 + 32, TB10X_PORT5 + 33,
TB10X_PORT5 + 34, TB10X_PORT5 + 35,
TB10X_PORT5 + 36, TB10X_PORT5 + 37,
TB10X_PORT5 + 38, TB10X_PORT5 + 39,
TB10X_PORT5 + 40, TB10X_PORT5 + 41,
TB10X_PORT5 + 42, TB10X_PORT5 + 43,
TB10X_PORT5 + 44, TB10X_PORT5 + 45,
TB10X_PORT5 + 46, TB10X_PORT5 + 47,
TB10X_PORT5 + 48, TB10X_PORT5 + 49,
TB10X_PORT5 + 50, TB10X_PORT5 + 51,
TB10X_PORT5 + 52, TB10X_PORT5 + 53};
static const unsigned ciplus_pins[] = { TB10X_PORT5 + 0, TB10X_PORT5 + 1,
TB10X_PORT5 + 2, TB10X_PORT5 + 3,
TB10X_PORT5 + 4, TB10X_PORT5 + 5,
TB10X_PORT5 + 6, TB10X_PORT5 + 7,
TB10X_PORT5 + 8, TB10X_PORT5 + 9,
TB10X_PORT5 + 10, TB10X_PORT5 + 11,
TB10X_PORT5 + 12, TB10X_PORT5 + 13,
TB10X_PORT5 + 14, TB10X_PORT5 + 15,
TB10X_PORT5 + 16, TB10X_PORT5 + 17,
TB10X_PORT5 + 18, TB10X_PORT5 + 19,
TB10X_PORT5 + 20, TB10X_PORT5 + 21,
TB10X_PORT5 + 22, TB10X_PORT5 + 23,
TB10X_PORT5 + 24, TB10X_PORT5 + 25,
TB10X_PORT5 + 26, TB10X_PORT5 + 27,
TB10X_PORT5 + 28, TB10X_PORT5 + 29,
TB10X_PORT5 + 30, TB10X_PORT5 + 31,
TB10X_PORT5 + 32, TB10X_PORT5 + 33,
TB10X_PORT5 + 34, TB10X_PORT5 + 35,
TB10X_PORT5 + 36, TB10X_PORT5 + 37,
TB10X_PORT5 + 38, TB10X_PORT5 + 39,
TB10X_PORT5 + 40, TB10X_PORT5 + 41,
TB10X_PORT5 + 42, TB10X_PORT5 + 43,
TB10X_PORT5 + 44, TB10X_PORT5 + 45,
TB10X_PORT5 + 46, TB10X_PORT5 + 47,
TB10X_PORT5 + 48, TB10X_PORT5 + 49,
TB10X_PORT5 + 50, TB10X_PORT5 + 51,
TB10X_PORT5 + 52, TB10X_PORT5 + 53};
static const unsigned mcard_pins[] = { TB10X_PORT5 + 3, TB10X_PORT5 + 10,
TB10X_PORT5 + 11, TB10X_PORT5 + 12,
TB10X_PORT5 + 22, TB10X_PORT5 + 23,
TB10X_PORT5 + 33, TB10X_PORT5 + 35,
TB10X_PORT5 + 36, TB10X_PORT5 + 37,
TB10X_PORT5 + 38, TB10X_PORT5 + 39,
TB10X_PORT5 + 40, TB10X_PORT5 + 41,
TB10X_PORT5 + 42, TB10X_PORT5 + 43,
TB10X_PORT5 + 45, TB10X_PORT5 + 46,
TB10X_PORT5 + 47, TB10X_PORT5 + 48,
TB10X_PORT5 + 49, TB10X_PORT5 + 50,
TB10X_PORT5 + 51, TB10X_PORT5 + 52,
TB10X_PORT5 + 53};
static const unsigned stc0_pins[] = { TB10X_PORT5 + 34, TB10X_PORT5 + 35,
TB10X_PORT5 + 36, TB10X_PORT5 + 37,
TB10X_PORT5 + 38, TB10X_PORT5 + 39,
TB10X_PORT5 + 40};
static const unsigned stc1_pins[] = { TB10X_PORT5 + 25, TB10X_PORT5 + 26,
TB10X_PORT5 + 27, TB10X_PORT5 + 28,
TB10X_PORT5 + 29, TB10X_PORT5 + 30,
TB10X_PORT5 + 44};
/* Unmuxed GPIOs */
static const unsigned gpiob_pins[] = { TB10X_GPIOS + 0, TB10X_GPIOS + 1};
static const unsigned gpiod_pins[] = { TB10X_GPIOS + 2, TB10X_GPIOS + 3};
static const unsigned gpiof_pins[] = { TB10X_GPIOS + 4, TB10X_GPIOS + 5};
static const unsigned gpioh_pins[] = { TB10X_GPIOS + 6, TB10X_GPIOS + 7};
static const unsigned gpioi_pins[] = { TB10X_GPIOS + 8, TB10X_GPIOS + 9,
TB10X_GPIOS + 10, TB10X_GPIOS + 11,
TB10X_GPIOS + 12, TB10X_GPIOS + 13,
TB10X_GPIOS + 14, TB10X_GPIOS + 15,
TB10X_GPIOS + 16, TB10X_GPIOS + 17,
TB10X_GPIOS + 18, TB10X_GPIOS + 19};
struct tb10x_pinfuncgrp {
const char *name;
const unsigned int *pins;
const unsigned int pincnt;
const int port;
const unsigned int mode;
const int isgpio;
};
#define DEFPINFUNCGRP(NAME, PORT, MODE, ISGPIO) { \
.name = __stringify(NAME), \
.pins = NAME##_pins, .pincnt = ARRAY_SIZE(NAME##_pins), \
.port = (PORT), .mode = (MODE), \
.isgpio = (ISGPIO), \
}
static const struct tb10x_pinfuncgrp tb10x_pingroups[] = {
DEFPINFUNCGRP(mis0, 0, 0, 0),
DEFPINFUNCGRP(gpioa, 0, 0, 1),
DEFPINFUNCGRP(mis1, 0, 0, 0),
DEFPINFUNCGRP(mip1, 0, 1, 0),
DEFPINFUNCGRP(mis2, 1, 0, 0),
DEFPINFUNCGRP(gpioc, 1, 0, 1),
DEFPINFUNCGRP(mis3, 1, 0, 0),
DEFPINFUNCGRP(mip3, 1, 1, 0),
DEFPINFUNCGRP(mis4, 2, 0, 0),
DEFPINFUNCGRP(gpioe, 2, 0, 1),
DEFPINFUNCGRP(mis5, 2, 0, 0),
DEFPINFUNCGRP(mip5, 2, 1, 0),
DEFPINFUNCGRP(mis6, 3, 0, 0),
DEFPINFUNCGRP(gpiog, 3, 0, 1),
DEFPINFUNCGRP(mis7, 3, 0, 0),
DEFPINFUNCGRP(mip7, 3, 1, 0),
DEFPINFUNCGRP(gpioj, 4, 0, 1),
DEFPINFUNCGRP(gpiok, 4, 0, 1),
DEFPINFUNCGRP(ciplus, 4, 1, 0),
DEFPINFUNCGRP(mcard, 4, 2, 0),
DEFPINFUNCGRP(stc0, 4, 3, 0),
DEFPINFUNCGRP(stc1, 4, 3, 0),
DEFPINFUNCGRP(mop, 5, 0, 0),
DEFPINFUNCGRP(mos0, 5, 1, 0),
DEFPINFUNCGRP(mos1, 5, 1, 0),
DEFPINFUNCGRP(mos2, 5, 1, 0),
DEFPINFUNCGRP(mos3, 5, 1, 0),
DEFPINFUNCGRP(uart0, 6, 0, 0),
DEFPINFUNCGRP(uart1, 6, 0, 0),
DEFPINFUNCGRP(gpiol, 6, 1, 1),
DEFPINFUNCGRP(gpiom, 6, 1, 1),
DEFPINFUNCGRP(spi3, 7, 0, 0),
DEFPINFUNCGRP(jtag, 7, 1, 0),
DEFPINFUNCGRP(spi1, 8, 0, 0),
DEFPINFUNCGRP(gpion, 8, 1, 1),
DEFPINFUNCGRP(gpiob, -1, 0, 1),
DEFPINFUNCGRP(gpiod, -1, 0, 1),
DEFPINFUNCGRP(gpiof, -1, 0, 1),
DEFPINFUNCGRP(gpioh, -1, 0, 1),
DEFPINFUNCGRP(gpioi, -1, 0, 1),
};
#undef DEFPINFUNCGRP
struct tb10x_of_pinfunc {
const char *name;
const char *group;
};
#define TB10X_PORTS (9)
/**
* struct tb10x_port - state of an I/O port
* @mode: Node this port is currently in.
* @count: Number of enabled functions which require this port to be
* configured in @mode.
*/
struct tb10x_port {
unsigned int mode;
unsigned int count;
};
/**
* struct tb10x_pinctrl - TB10x pin controller internal state
* @pctl: pointer to the pinctrl_dev structure of this pin controller.
* @base: register set base address.
* @pingroups: pointer to an array of the pin groups this driver manages.
* @pinfuncgrpcnt: number of pingroups in @pingroups.
* @pinfuncnt: number of pin functions in @pinfuncs.
* @mutex: mutex for exclusive access to a pin controller's state.
* @ports: current state of each port.
* @gpios: Indicates if a given pin is currently used as GPIO (1) or not (0).
* @pinfuncs: flexible array of pin functions this driver manages.
*/
struct tb10x_pinctrl {
struct pinctrl_dev *pctl;
void *base;
const struct tb10x_pinfuncgrp *pingroups;
unsigned int pinfuncgrpcnt;
unsigned int pinfuncnt;
struct mutex mutex;
struct tb10x_port ports[TB10X_PORTS];
DECLARE_BITMAP(gpios, MAX_PIN + 1);
struct tb10x_of_pinfunc pinfuncs[];
};
static inline void tb10x_pinctrl_set_config(struct tb10x_pinctrl *state,
unsigned int port, unsigned int mode)
{
u32 pcfg;
if (state->ports[port].count)
return;
state->ports[port].mode = mode;
pcfg = ioread32(state->base) & ~(PCFG_PORT_MASK(port));
pcfg |= (mode << (PCFG_PORT_BITWIDTH * port)) & PCFG_PORT_MASK(port);
iowrite32(pcfg, state->base);
}
static inline unsigned int tb10x_pinctrl_get_config(
struct tb10x_pinctrl *state,
unsigned int port)
{
return (ioread32(state->base) & PCFG_PORT_MASK(port))
>> (PCFG_PORT_BITWIDTH * port);
}
static int tb10x_get_groups_count(struct pinctrl_dev *pctl)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
return state->pinfuncgrpcnt;
}
static const char *tb10x_get_group_name(struct pinctrl_dev *pctl, unsigned n)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
return state->pingroups[n].name;
}
static int tb10x_get_group_pins(struct pinctrl_dev *pctl, unsigned n,
unsigned const **pins,
unsigned * const num_pins)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
*pins = state->pingroups[n].pins;
*num_pins = state->pingroups[n].pincnt;
return 0;
}
static int tb10x_dt_node_to_map(struct pinctrl_dev *pctl,
struct device_node *np_config,
struct pinctrl_map **map, unsigned *num_maps)
{
const char *string;
unsigned reserved_maps = 0;
int ret = 0;
if (of_property_read_string(np_config, "abilis,function", &string)) {
pr_err("%pOF: No abilis,function property in device tree.\n",
np_config);
return -EINVAL;
}
*map = NULL;
*num_maps = 0;
ret = pinctrl_utils_reserve_map(pctl, map, &reserved_maps,
num_maps, 1);
if (ret)
goto out;
ret = pinctrl_utils_add_map_mux(pctl, map, &reserved_maps,
num_maps, string, np_config->name);
out:
return ret;
}
static const struct pinctrl_ops tb10x_pinctrl_ops = {
.get_groups_count = tb10x_get_groups_count,
.get_group_name = tb10x_get_group_name,
.get_group_pins = tb10x_get_group_pins,
.dt_node_to_map = tb10x_dt_node_to_map,
.dt_free_map = pinctrl_utils_free_map,
};
static int tb10x_get_functions_count(struct pinctrl_dev *pctl)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
return state->pinfuncnt;
}
static const char *tb10x_get_function_name(struct pinctrl_dev *pctl,
unsigned n)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
return state->pinfuncs[n].name;
}
static int tb10x_get_function_groups(struct pinctrl_dev *pctl,
unsigned n, const char * const **groups,
unsigned * const num_groups)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
*groups = &state->pinfuncs[n].group;
*num_groups = 1;
return 0;
}
static int tb10x_gpio_request_enable(struct pinctrl_dev *pctl,
struct pinctrl_gpio_range *range,
unsigned pin)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
int muxport = -1;
int muxmode = -1;
int i;
mutex_lock(&state->mutex);
/*
* Figure out to which port the requested GPIO belongs and how to
* configure that port.
* This loop also checks for pin conflicts between GPIOs and other
* functions.
*/
for (i = 0; i < state->pinfuncgrpcnt; i++) {
const struct tb10x_pinfuncgrp *pfg = &state->pingroups[i];
unsigned int mode = pfg->mode;
int j, port = pfg->port;
/*
* Skip pin groups which are always mapped and don't need
* to be configured.
*/
if (port < 0)
continue;
for (j = 0; j < pfg->pincnt; j++) {
if (pin == pfg->pins[j]) {
if (pfg->isgpio) {
/*
* Remember the GPIO-only setting of
* the port this pin belongs to.
*/
muxport = port;
muxmode = mode;
} else if (state->ports[port].count
&& (state->ports[port].mode == mode)) {
/*
* Error: The requested pin is already
* used for something else.
*/
mutex_unlock(&state->mutex);
return -EBUSY;
}
break;
}
}
}
/*
* If we haven't returned an error at this point, the GPIO pin is not
* used by another function and the GPIO request can be granted:
* Register pin as being used as GPIO so we don't allocate it to
* another function later.
*/
set_bit(pin, state->gpios);
/*
* Potential conflicts between GPIOs and pin functions were caught
* earlier in this function and tb10x_pinctrl_set_config will do the
* Right Thing, either configure the port in GPIO only mode or leave
* another mode compatible with this GPIO request untouched.
*/
if (muxport >= 0)
tb10x_pinctrl_set_config(state, muxport, muxmode);
mutex_unlock(&state->mutex);
return 0;
}
static void tb10x_gpio_disable_free(struct pinctrl_dev *pctl,
struct pinctrl_gpio_range *range,
unsigned pin)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
mutex_lock(&state->mutex);
clear_bit(pin, state->gpios);
mutex_unlock(&state->mutex);
}
static int tb10x_pctl_set_mux(struct pinctrl_dev *pctl,
unsigned func_selector, unsigned group_selector)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
const struct tb10x_pinfuncgrp *grp = &state->pingroups[group_selector];
int i;
if (grp->port < 0)
return 0;
mutex_lock(&state->mutex);
/*
* Check if the requested function is compatible with previously
* requested functions.
*/
if (state->ports[grp->port].count
&& (state->ports[grp->port].mode != grp->mode)) {
mutex_unlock(&state->mutex);
return -EBUSY;
}
/*
* Check if the requested function is compatible with previously
* requested GPIOs.
*/
for (i = 0; i < grp->pincnt; i++)
if (test_bit(grp->pins[i], state->gpios)) {
mutex_unlock(&state->mutex);
return -EBUSY;
}
tb10x_pinctrl_set_config(state, grp->port, grp->mode);
state->ports[grp->port].count++;
mutex_unlock(&state->mutex);
return 0;
}
static const struct pinmux_ops tb10x_pinmux_ops = {
.get_functions_count = tb10x_get_functions_count,
.get_function_name = tb10x_get_function_name,
.get_function_groups = tb10x_get_function_groups,
.gpio_request_enable = tb10x_gpio_request_enable,
.gpio_disable_free = tb10x_gpio_disable_free,
.set_mux = tb10x_pctl_set_mux,
};
static struct pinctrl_desc tb10x_pindesc = {
.name = "TB10x",
.pins = tb10x_pins,
.npins = ARRAY_SIZE(tb10x_pins),
.owner = THIS_MODULE,
.pctlops = &tb10x_pinctrl_ops,
.pmxops = &tb10x_pinmux_ops,
};
static int tb10x_pinctrl_probe(struct platform_device *pdev)
{
int ret = -EINVAL;
struct device *dev = &pdev->dev;
struct device_node *of_node = dev->of_node;
struct device_node *child;
struct tb10x_pinctrl *state;
int i;
if (!of_node) {
dev_err(dev, "No device tree node found.\n");
return -EINVAL;
}
state = devm_kzalloc(dev, struct_size(state, pinfuncs,
of_get_child_count(of_node)),
GFP_KERNEL);
if (!state)
return -ENOMEM;
platform_set_drvdata(pdev, state);
mutex_init(&state->mutex);
state->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(state->base)) {
ret = PTR_ERR(state->base);
goto fail;
}
state->pingroups = tb10x_pingroups;
state->pinfuncgrpcnt = ARRAY_SIZE(tb10x_pingroups);
for (i = 0; i < TB10X_PORTS; i++)
state->ports[i].mode = tb10x_pinctrl_get_config(state, i);
for_each_child_of_node(of_node, child) {
const char *name;
if (!of_property_read_string(child, "abilis,function",
&name)) {
state->pinfuncs[state->pinfuncnt].name = child->name;
state->pinfuncs[state->pinfuncnt].group = name;
state->pinfuncnt++;
}
}
state->pctl = devm_pinctrl_register(dev, &tb10x_pindesc, state);
if (IS_ERR(state->pctl)) {
dev_err(dev, "could not register TB10x pin driver\n");
ret = PTR_ERR(state->pctl);
goto fail;
}
return 0;
fail:
mutex_destroy(&state->mutex);
return ret;
}
static void tb10x_pinctrl_remove(struct platform_device *pdev)
{
struct tb10x_pinctrl *state = platform_get_drvdata(pdev);
mutex_destroy(&state->mutex);
}
static const struct of_device_id tb10x_pinctrl_dt_ids[] = {
{ .compatible = "abilis,tb10x-iomux" },
{ }
};
MODULE_DEVICE_TABLE(of, tb10x_pinctrl_dt_ids);
static struct platform_driver tb10x_pinctrl_pdrv = {
.probe = tb10x_pinctrl_probe,
.remove_new = tb10x_pinctrl_remove,
.driver = {
.name = "tb10x_pinctrl",
.of_match_table = of_match_ptr(tb10x_pinctrl_dt_ids),
}
};
module_platform_driver(tb10x_pinctrl_pdrv);
MODULE_AUTHOR("Christian Ruppert <christian.ruppert@abilis.com>");
MODULE_LICENSE("GPL");
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