Siyuan Wang ([email protected]) just uploaded a new patch set to gerrit, 
which you can find at http://review.coreboot.org/1494

-gerrit

commit fbc9bc1318c6ee554f0827fadd148d779173b59d
Author: Siyuan Wang <[email protected]>
Date:   Fri Sep 7 19:18:16 2012 +0800

    superio winbond w83627dhg: add a function which is used on tyan s8226
    
    this function is used on serial output of tyan s8226
    
    Change-Id: I5f7fa535b922b224e381886f1bea64623fa549ef
    Signed-off-by: Siyuan Wang <[email protected]>
    Signed-off-by: Siyuan Wang <[email protected]>
---
 src/superio/winbond/w83627dhg/early_serial.c | 10 ++++++++++
 src/superio/winbond/w83627dhg/w83627dhg.h    |  1 +
 2 files changed, 11 insertions(+)

diff --git a/src/superio/winbond/w83627dhg/early_serial.c 
b/src/superio/winbond/w83627dhg/early_serial.c
index e0be8de..39ce8bf 100644
--- a/src/superio/winbond/w83627dhg/early_serial.c
+++ b/src/superio/winbond/w83627dhg/early_serial.c
@@ -67,3 +67,13 @@ void w83627dhg_enable_i2c(device_t dev)
        pnp_exit_ext_func_mode(dev);
 }
 
+void w83627dhg_set_clksel_48(device_t dev)
+{
+       u8 reg8;
+
+       pnp_enter_ext_func_mode(dev);
+       reg8 = pnp_read_config(dev, 0x24);
+       reg8 |= (1 << 6); /* Set CLKSEL (clock input on pin 1) to 48MHz. */
+       pnp_write_config(dev, 0x24, reg8);
+       pnp_exit_ext_func_mode(dev);
+}
diff --git a/src/superio/winbond/w83627dhg/w83627dhg.h 
b/src/superio/winbond/w83627dhg/w83627dhg.h
index 158e60b..3aa1b26 100644
--- a/src/superio/winbond/w83627dhg/w83627dhg.h
+++ b/src/superio/winbond/w83627dhg/w83627dhg.h
@@ -56,5 +56,6 @@ void pnp_enter_ext_func_mode(device_t dev);
 void pnp_exit_ext_func_mode(device_t dev);
 void w83627dhg_enable_serial(device_t dev, u16 iobase);
 void w83627dhg_enable_i2c(device_t dev);
+void w83627dhg_set_clksel_48(device_t dev);
 
 #endif

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