drivers/mtd/spi/sf-uclass.c

   1 /*
   2  * Copyright (c) 2014 Google, Inc
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <spi.h>
  10 #include <spi_flash.h>
  11 #include <dm/device-internal.h>
  12 #include "sf_internal.h"
  13
  14 /*
  15  * TODO(sjg@chromium.org): This is an old-style function. We should remove
  16  * it when all SPI flash drivers use dm
  17  */
  18 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
  19                                   unsigned int max_hz, unsigned int spi_mode)
  20 {
  21         struct udevice *dev;
  22
  23         if (spi_flash_probe_bus_cs(bus, cs, max_hz, spi_mode, &dev))
  24                 return NULL;
  25
  26         return dev->uclass_priv;
  27 }
  28
  29 void spi_flash_free(struct spi_flash *flash)
  30 {
  31         spi_flash_remove(flash->spi->dev);
  32 }
  33
  34 int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
  35                            unsigned int max_hz, unsigned int spi_mode,
  36                            struct udevice **devp)
  37 {
  38         struct spi_slave *slave;
  39         struct udevice *bus;
  40         char name[20], *str;
  41         int ret;
  42
  43         snprintf(name, sizeof(name), "%d:%d", busnum, cs);
  44         str = strdup(name);
  45         ret = spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode,
  46                                   "spi_flash_std", str, &bus, &slave);
  47         if (ret)
  48                 return ret;
  49
  50         *devp = slave->dev;
  51         return 0;
  52 }
  53
  54 int spi_flash_remove(struct udevice *dev)
  55 {
  56         return device_remove(dev);
  57 }
  58
  59 UCLASS_DRIVER(spi_flash) = {
  60         .id             = UCLASS_SPI_FLASH,
  61         .name           = "spi_flash",
  62         .per_device_auto_alloc_size = sizeof(struct spi_flash),
  63 };