1 /* 2 * Allwinner A23 SoCs special pins pinctrl driver. 3 * 4 * Copyright (C) 2014 Chen-Yu Tsai 5 * Chen-Yu Tsai <wens@csie.org> 6 * 7 * Copyright (C) 2014 Boris Brezillon 8 * Boris Brezillon <boris.brezillon@free-electrons.com> 9 * 10 * Copyright (C) 2014 Maxime Ripard 11 * Maxime Ripard <maxime.ripard@free-electrons.com> 12 * 13 * This file is licensed under the terms of the GNU General Public 14 * License version 2. This program is licensed "as is" without any 15 * warranty of any kind, whether express or implied. 16 */ 17 18 #include <linux/module.h> 19 #include <linux/platform_device.h> 20 #include <linux/of.h> 21 #include <linux/of_device.h> 22 #include <linux/pinctrl/pinctrl.h> 23 #include <linux/reset.h> 24 25 #include "pinctrl-sunxi.h" 26 27 static const struct sunxi_desc_pin sun8i_a23_r_pins[] = { 28 SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 0), 29 SUNXI_FUNCTION(0x0, "gpio_in"), 30 SUNXI_FUNCTION(0x1, "gpio_out"), 31 SUNXI_FUNCTION(0x2, "s_rsb"), /* SCK */ 32 SUNXI_FUNCTION(0x3, "s_twi"), /* SCK */ 33 SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 0)), /* PL_EINT0 */ 34 SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 1), 35 SUNXI_FUNCTION(0x0, "gpio_in"), 36 SUNXI_FUNCTION(0x1, "gpio_out"), 37 SUNXI_FUNCTION(0x2, "s_rsb"), /* SDA */ 38 SUNXI_FUNCTION(0x3, "s_twi"), /* SDA */ 39 SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 1)), /* PL_EINT1 */ 40 SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 2), 41 SUNXI_FUNCTION(0x0, "gpio_in"), 42 SUNXI_FUNCTION(0x1, "gpio_out"), 43 SUNXI_FUNCTION(0x2, "s_uart"), /* TX */ 44 SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 2)), /* PL_EINT2 */ 45 SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 3), 46 SUNXI_FUNCTION(0x0, "gpio_in"), 47 SUNXI_FUNCTION(0x1, "gpio_out"), 48 SUNXI_FUNCTION(0x2, "s_uart"), /* RX */ 49 SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 3)), /* PL_EINT3 */ 50 SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 4), 51 SUNXI_FUNCTION(0x0, "gpio_in"), 52 SUNXI_FUNCTION(0x1, "gpio_out"), 53 SUNXI_FUNCTION(0x3, "s_jtag"), /* MS */ 54 SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 4)), /* PL_EINT4 */ 55 SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 5), 56 SUNXI_FUNCTION(0x0, "gpio_in"), 57 SUNXI_FUNCTION(0x1, "gpio_out"), 58 SUNXI_FUNCTION(0x3, "s_jtag"), /* CK */ 59 SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 5)), /* PL_EINT5 */ 60 SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 6), 61 SUNXI_FUNCTION(0x0, "gpio_in"), 62 SUNXI_FUNCTION(0x1, "gpio_out"), 63 SUNXI_FUNCTION(0x3, "s_jtag"), /* DO */ 64 SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 6)), /* PL_EINT6 */ 65 SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 7), 66 SUNXI_FUNCTION(0x0, "gpio_in"), 67 SUNXI_FUNCTION(0x1, "gpio_out"), 68 SUNXI_FUNCTION(0x3, "s_jtag"), /* DI */ 69 SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 7)), /* PL_EINT7 */ 70 SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 8), 71 SUNXI_FUNCTION(0x0, "gpio_in"), 72 SUNXI_FUNCTION(0x1, "gpio_out"), 73 SUNXI_FUNCTION(0x2, "s_twi"), /* SCK */ 74 SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 8)), /* PL_EINT8 */ 75 SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 9), 76 SUNXI_FUNCTION(0x0, "gpio_in"), 77 SUNXI_FUNCTION(0x1, "gpio_out"), 78 SUNXI_FUNCTION(0x2, "s_twi"), /* SDA */ 79 SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 9)), /* PL_EINT9 */ 80 SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 10), 81 SUNXI_FUNCTION(0x0, "gpio_in"), 82 SUNXI_FUNCTION(0x1, "gpio_out"), 83 SUNXI_FUNCTION(0x2, "s_pwm"), 84 SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 10)), /* PL_EINT10 */ 85 SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 11), 86 SUNXI_FUNCTION(0x0, "gpio_in"), 87 SUNXI_FUNCTION(0x1, "gpio_out"), 88 SUNXI_FUNCTION_IRQ_BANK(0x4, 0, 11)), /* PL_EINT11 */ 89 }; 90 91 static const struct sunxi_pinctrl_desc sun8i_a23_r_pinctrl_data = { 92 .pins = sun8i_a23_r_pins, 93 .npins = ARRAY_SIZE(sun8i_a23_r_pins), 94 .pin_base = PL_BASE, 95 .irq_banks = 1, 96 }; 97 98 static int sun8i_a23_r_pinctrl_probe(struct platform_device *pdev) 99 { 100 struct reset_control *rstc; 101 int ret; 102 103 rstc = devm_reset_control_get(&pdev->dev, NULL); 104 if (IS_ERR(rstc)) { 105 dev_err(&pdev->dev, "Reset controller missing\n"); 106 return PTR_ERR(rstc); 107 } 108 109 ret = reset_control_deassert(rstc); 110 if (ret) 111 return ret; 112 113 ret = sunxi_pinctrl_init(pdev, 114 &sun8i_a23_r_pinctrl_data); 115 116 if (ret) 117 reset_control_assert(rstc); 118 119 return ret; 120 } 121 122 static struct of_device_id sun8i_a23_r_pinctrl_match[] = { 123 { .compatible = "allwinner,sun8i-a23-r-pinctrl", }, 124 {} 125 }; 126 MODULE_DEVICE_TABLE(of, sun8i_a23_r_pinctrl_match); 127 128 static struct platform_driver sun8i_a23_r_pinctrl_driver = { 129 .probe = sun8i_a23_r_pinctrl_probe, 130 .driver = { 131 .name = "sun8i-a23-r-pinctrl", 132 .of_match_table = sun8i_a23_r_pinctrl_match, 133 }, 134 }; 135 module_platform_driver(sun8i_a23_r_pinctrl_driver); 136 137 MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>"); 138 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com"); 139 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com"); 140 MODULE_DESCRIPTION("Allwinner A23 R_PIO pinctrl driver"); 141 MODULE_LICENSE("GPL"); 142