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authorBin Meng <bmeng.cn@gmail.com>2015-02-04 16:26:12 +0800
committerSimon Glass <sjg@chromium.org>2015-02-06 12:07:45 -0700
commit728b393f3b012ac46505151b80af1d4334786845 (patch)
treef7a9eaa7476cad5432886ee7d121044d7adc035a /arch
parent38fc1cdae0fb7a429222b7b85f8cdaefbd078e21 (diff)
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x86: Add SPI support to quark/galileo
The Quark SoC contains a legacy SPI controller in the legacy bridge which is ICH7 compatible. Like Tunnel Creek and BayTrail, the BIOS control register offset in the ICH SPI driver is wrong for the Quark SoC too, unprotect_spi_flash() is added to enable the flash write. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/cpu/quark/quark.c17
-rw-r--r--arch/x86/dts/galileo.dts13
2 files changed, 30 insertions, 0 deletions
diff --git a/arch/x86/cpu/quark/quark.c b/arch/x86/cpu/quark/quark.c
index cf596e4..0d593d9 100644
--- a/arch/x86/cpu/quark/quark.c
+++ b/arch/x86/cpu/quark/quark.c
@@ -13,6 +13,21 @@
#include <asm/arch/msg_port.h>
#include <asm/arch/quark.h>
+/*
+ * TODO:
+ *
+ * This whole routine should be removed until we fully convert the ICH SPI
+ * driver to DM and make use of DT to pass the bios control register offset
+ */
+static void unprotect_spi_flash(void)
+{
+ u32 bc;
+
+ bc = pci_read_config32(QUARK_LEGACY_BRIDGE, 0xd8);
+ bc |= 0x1; /* unprotect the flash */
+ pci_write_config32(QUARK_LEGACY_BRIDGE, 0xd8, bc);
+}
+
static void quark_setup_bars(void)
{
/* GPIO - D31:F0:R44h */
@@ -74,6 +89,8 @@ int arch_cpu_init(void)
*/
quark_setup_bars();
+ unprotect_spi_flash();
+
return 0;
}
diff --git a/arch/x86/dts/galileo.dts b/arch/x86/dts/galileo.dts
index 2f60aeb..66af64a 100644
--- a/arch/x86/dts/galileo.dts
+++ b/arch/x86/dts/galileo.dts
@@ -79,4 +79,17 @@
bank-name = "B";
};
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "intel,ich-spi";
+ spi-flash@0 {
+ #size-cells = <1>;
+ #address-cells = <1>;
+ reg = <0>;
+ compatible = "winbond,w25q64", "spi-flash";
+ memory-map = <0xff800000 0x00800000>;
+ };
+ };
+
};