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spi: ich: Don't require the PCH

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When booting from coreboot we may not have a PCH driver available. The
SPI driver can operate without the PCH but currently complains in this
case. Update it to continue to work normally. The only missing feature
is memory-mapping of SPI-flash contents, which is not essential.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
Simon Glass 2021-06-27 17:50:59 -06:00 committed by Bin Meng
parent f5cbb5c7cd
commit f784361b2a
1 changed files with 2 additions and 2 deletions
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4
drivers/spi/ich.c
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@ -114,7 +114,7 @@ static bool ich9_can_do_33mhz(struct udevice *dev)
struct ich_spi_priv *priv = dev_get_priv(dev); struct ich_spi_priv *priv = dev_get_priv(dev);
u32 fdod, speed; u32 fdod, speed;
if (!CONFIG_IS_ENABLED(PCI)) if (!CONFIG_IS_ENABLED(PCI) || !priv->pch)
return false; return false;
/* Observe SPI Descriptor Component Section 0 */ /* Observe SPI Descriptor Component Section 0 */
dm_pci_write_config32(priv->pch, 0xb0, 0x1000); dm_pci_write_config32(priv->pch, 0xb0, 0x1000);
@ -632,7 +632,7 @@ static int ich_spi_get_basics(struct udevice *bus, bool can_probe,
if (device_get_uclass_id(pch) != UCLASS_PCH) { if (device_get_uclass_id(pch) != UCLASS_PCH) {
uclass_first_device(UCLASS_PCH, &pch); uclass_first_device(UCLASS_PCH, &pch);
if (!pch) if (!pch)
return log_msg_ret("uclass", -EPROTOTYPE); ; /* ignore this error since we don't need it */
} }
} }