1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * 4 * Copyright (C) 2012 John Crispin <john@phrozen.org> 5 */ 6 7 #include <linux/err.h> 8 #include <linux/export.h> 9 #include <linux/gpio/consumer.h> 10 #include <linux/of_platform.h> 11 #include <linux/dma-mapping.h> 12 13 #include <lantiq_soc.h> 14 15 static unsigned int *cp1_base; 16 17 unsigned int *ltq_get_cp1_base(void) 18 { 19 if (!cp1_base) 20 panic("no cp1 base was set\n"); 21 22 return cp1_base; 23 } 24 EXPORT_SYMBOL(ltq_get_cp1_base); 25 26 static int vmmc_probe(struct platform_device *pdev) 27 { 28 #define CP1_SIZE (1 << 20) 29 struct gpio_desc *gpio; 30 int gpio_count; 31 dma_addr_t dma; 32 int error; 33 34 cp1_base = 35 (void *) CPHYSADDR(dma_alloc_coherent(&pdev->dev, CP1_SIZE, 36 &dma, GFP_KERNEL)); 37 38 gpio_count = gpiod_count(&pdev->dev, NULL); 39 while (gpio_count > 0) { 40 gpio = devm_gpiod_get_index(&pdev->dev, 41 NULL, --gpio_count, GPIOD_OUT_HIGH); 42 error = PTR_ERR_OR_ZERO(gpio); 43 if (error) { 44 dev_err(&pdev->dev, 45 "failed to request GPIO idx %d: %d\n", 46 gpio_count, error); 47 continue; 48 } 49 50 gpiod_set_consumer_name(gpio, "vmmc-relay"); 51 } 52 53 dev_info(&pdev->dev, "reserved %dMB at 0x%p", CP1_SIZE >> 20, cp1_base); 54 55 return 0; 56 } 57 58 static const struct of_device_id vmmc_match[] = { 59 { .compatible = "lantiq,vmmc-xway" }, 60 {}, 61 }; 62 63 static struct platform_driver vmmc_driver = { 64 .probe = vmmc_probe, 65 .driver = { 66 .name = "lantiq,vmmc", 67 .of_match_table = vmmc_match, 68 }, 69 }; 70 builtin_platform_driver(vmmc_driver); 71