spi: ich: Don't require the PCH

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>

diff --git a/drivers/spi/ich.c b/drivers/spi/ich.c
index 1cd410493b099c6e8d30efb98bf1f251beb86718..3d49c22a9da47dd43e21d2ae1f7e4830afa53e93 100644 (file)
--- a/drivers/spi/ich.c
+++ b/drivers/spi/ich.c
@@ -114,7 +114,7 @@ static bool ich9_can_do_33mhz(struct udevice *dev)
        struct ich_spi_priv *priv = dev_get_priv(dev);
        u32 fdod, speed;
 
-       if (!CONFIG_IS_ENABLED(PCI))
+       if (!CONFIG_IS_ENABLED(PCI) || !priv->pch)
                return false;
        /* Observe SPI Descriptor Component Section 0 */
        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) {
                        uclass_first_device(UCLASS_PCH, &pch);
                        if (!pch)
-                               return log_msg_ret("uclass", -EPROTOTYPE);
+                               ; /* ignore this error since we don't need it */
                }
        }