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x86: Adjust mrccache_get_region() to use livetree

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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>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2019-12-06 21:42:03 -07:00 committed by Bin Meng
parent 0ad9b6a988
commit 87f1084a63
1 changed files with 26 additions and 29 deletions
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55
arch/x86/lib/mrccache.c
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@ -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;
@ -206,45 +208,37 @@ 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;
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;
}
/*
* Find the flash chip within the SPI controller node. Avoid probing
* the device here since it may put it into a strange state where the
* memory map cannot be read.
*/
ret = uclass_find_first_device(UCLASS_SPI_FLASH, &dev);
if (ret)
return log_msg_ret("Cannot find SPI flash\n", ret);
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];
/* 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;
return 0;
}
@ -262,6 +256,9 @@ int mrccache_save(void)
gd->arch.mrc_output_len);
ret = mrccache_get_region(&sf, &entry);
if (ret)
goto err_entry;
ret = device_probe(sf);
if (ret)
goto err_entry;
data = (struct mrc_data_container *)gd->arch.mrc_output;