Re: [U-Boot] [PATCH 082/126] x86: Adjust mrccache_get_region() to use livetree

Hi Simon,

On Wed, Sep 25, 2019 at 10:59 PM Simon Glass sjg@chromium.org wrote:

Change the algorithm to first find the flash device then read the properties using the livetree API. With this change the device is not probed so this needs to be done in mrccache_save().

Signed-off-by: Simon Glass sjg@chromium.org

arch/x86/lib/mrccache.c | 59 ++++++++++++++++++++++------------------- 1 file changed, 31 insertions(+), 28 deletions(-)

diff --git a/arch/x86/lib/mrccache.c b/arch/x86/lib/mrccache.c index e286bdf1b30..296dd5e54f7 100644 --- a/arch/x86/lib/mrccache.c +++ b/arch/x86/lib/mrccache.c @@ -14,6 +14,8 @@ #include <spi.h> #include <spi_flash.h> #include <asm/mrccache.h> +#include <dm/device-internal.h> +#include <dm/uclass-internal.h>

DECLARE_GLOBAL_DATA_PTR;

@@ -197,45 +199,43 @@ int mrccache_reserve(void)

int mrccache_get_region(struct udevice **devp, struct mrc_region *entry) {

•   const void *blob = gd->fdt_blob;
  

•   int node, mrc_node;
  

•   struct udevice *dev;
  

•   ofnode mrc_node;
  

•   ulong map_base;
  

•   size_t map_size;
  

•   u32 offset;
    u32 reg[2];
    int ret;
  
    /* Find the flash chip within the SPI controller node */
  

•   node = fdtdec_next_compatible(blob, 0, COMPAT_GENERIC_SPI_FLASH);
  

•   if (node < 0) {
  

•           debug("%s: Cannot find SPI flash\n", __func__);
  

•           return -ENOENT;
  

•   }
  

•   if (fdtdec_get_int_array(blob, node, "memory-map", reg, 2)) {
  

•           debug("%s: Cannot find memory map\n", __func__);
  

•           return -EINVAL;
  

•   ret = uclass_find_first_device(UCLASS_SPI_FLASH, &dev);
  

•   if (ret)
  

•           return log_msg_ret("Cannot find SPI flash\n", ret);
  

•   ret = spi_flash_get_mmap(dev, &map_base, &map_size, &offset);
  

This looks a separate patch, not related to livetree conversion.

•   if (!ret) {
  

•           entry->base = map_base;
  

•   } else {
  

•           ret = dev_read_u32_array(dev, "memory-map", reg, 2);
  

•           if (ret)
  

•                   return log_msg_ret("Cannot find memory map\n", ret);
  

•           entry->base = reg[0];
    }
  

•   entry->base = reg[0];
  
    /* Find the place where we put the MRC cache */
  

•   mrc_node = fdt_subnode_offset(blob, node, "rw-mrc-cache");
  

•   if (mrc_node < 0) {
  

•           debug("%s: Cannot find node\n", __func__);
  

•           return -EPERM;
  

•   }
  

•   mrc_node = dev_read_subnode(dev, "rw-mrc-cache");
  

•   if (!ofnode_valid(mrc_node))
  

•           return log_msg_ret("Cannot find node", -EPERM);
  
  

•   if (fdtdec_get_int_array(blob, mrc_node, "reg", reg, 2)) {
  

•           debug("%s: Cannot find address\n", __func__);
  

•           return -EINVAL;
  

•   }
  

•   ret = ofnode_read_u32_array(mrc_node, "reg", reg, 2);
  

•   if (ret)
  

•           return log_msg_ret("Cannot find address", ret);
    entry->offset = reg[0];
    entry->length = reg[1];
  
  

•   if (devp) {
  

•           ret = uclass_get_device_by_of_offset(UCLASS_SPI_FLASH, node,
  

•                                                devp);
  

•           debug("ret = %d\n", ret);
  

•           if (ret)
  

•                   return ret;
  

•   }
  

•   if (devp)
  

•           *devp = dev;
  

•   debug("MRC cache in '%s', offset %x, len %x, base %x\n",
  

•         dev->name, entry->offset, entry->length, entry->base);
  
    return 0;
  

} @@ -253,6 +253,9 @@ int mrccache_save(void) gd->arch.mrc_output_len);

    ret = mrccache_get_region(&sf, &entry);

•   if (ret)
  

•           goto err_entry;
  

•   ret = device_probe(sf);
  

Why we need manually probe spi flash here?

    if (ret)
            goto err_entry;
    data  = (struct mrc_data_container *)gd->arch.mrc_output;

--

Regards, Bin