| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * arch/arm/plat-iop/i2c.c |
| 4 | * |
| 5 | * Author: Nicolas Pitre <nico@cam.org> |
| 6 | * Copyright (C) 2001 MontaVista Software, Inc. |
| 7 | * Copyright (C) 2004 Intel Corporation. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/mm.h> |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/major.h> |
| 13 | #include <linux/fs.h> |
| 14 | #include <linux/platform_device.h> |
| 15 | #include <linux/serial.h> |
| 16 | #include <linux/tty.h> |
| 17 | #include <linux/serial_core.h> |
| 18 | #include <linux/io.h> |
| 19 | #include <linux/gpio/machine.h> |
| 20 | #include <asm/pgtable.h> |
| 21 | #include <asm/page.h> |
| 22 | #include <asm/mach/map.h> |
| 23 | #include <asm/setup.h> |
| 24 | #include <asm/memory.h> |
| 25 | #include <asm/mach/arch.h> |
| 26 | |
| 27 | #include "hardware.h" |
| 28 | #include "iop3xx.h" |
| 29 | #include "irqs.h" |
| 30 | |
| 31 | /* |
| 32 | * Each of the I2C busses have corresponding GPIO lines, and the driver |
| 33 | * need to access these directly to drive the bus low at times. |
| 34 | */ |
| 35 | |
| 36 | struct gpiod_lookup_table iop3xx_i2c0_gpio_lookup = { |
| 37 | .dev_id = "IOP3xx-I2C.0", |
| 38 | .table = { |
| 39 | GPIO_LOOKUP("gpio-iop", 7, "scl", GPIO_ACTIVE_HIGH), |
| 40 | GPIO_LOOKUP("gpio-iop", 6, "sda", GPIO_ACTIVE_HIGH), |
| 41 | { } |
| 42 | }, |
| 43 | }; |
| 44 | |
| 45 | struct gpiod_lookup_table iop3xx_i2c1_gpio_lookup = { |
| 46 | .dev_id = "IOP3xx-I2C.1", |
| 47 | .table = { |
| 48 | GPIO_LOOKUP("gpio-iop", 5, "scl", GPIO_ACTIVE_HIGH), |
| 49 | GPIO_LOOKUP("gpio-iop", 4, "sda", GPIO_ACTIVE_HIGH), |
| 50 | { } |
| 51 | }, |
| 52 | }; |
| 53 | |
| 54 | static struct resource iop3xx_i2c0_resources[] = { |
| 55 | [0] = { |
| 56 | .start = 0xfffff680, |
| 57 | .end = 0xfffff697, |
| 58 | .flags = IORESOURCE_MEM, |
| 59 | }, |
| 60 | [1] = { |
| 61 | .start = IRQ_IOP32X_I2C_0, |
| 62 | .end = IRQ_IOP32X_I2C_0, |
| 63 | .flags = IORESOURCE_IRQ, |
| 64 | }, |
| 65 | }; |
| 66 | |
| 67 | struct platform_device iop3xx_i2c0_device = { |
| 68 | .name = "IOP3xx-I2C", |
| 69 | .id = 0, |
| 70 | .num_resources = 2, |
| 71 | .resource = iop3xx_i2c0_resources, |
| 72 | }; |
| 73 | |
| 74 | |
| 75 | static struct resource iop3xx_i2c1_resources[] = { |
| 76 | [0] = { |
| 77 | .start = 0xfffff6a0, |
| 78 | .end = 0xfffff6b7, |
| 79 | .flags = IORESOURCE_MEM, |
| 80 | }, |
| 81 | [1] = { |
| 82 | .start = IRQ_IOP32X_I2C_1, |
| 83 | .end = IRQ_IOP32X_I2C_1, |
| 84 | .flags = IORESOURCE_IRQ, |
| 85 | } |
| 86 | }; |
| 87 | |
| 88 | struct platform_device iop3xx_i2c1_device = { |
| 89 | .name = "IOP3xx-I2C", |
| 90 | .id = 1, |
| 91 | .num_resources = 2, |
| 92 | .resource = iop3xx_i2c1_resources, |
| 93 | }; |