<sect2><title>SATA phy read/write</title>
<programlisting>
-u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
-void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
+int (*scr_read) (struct ata_port *ap, unsigned int sc_reg,
+ u32 *val);
+int (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
u32 val);
</programlisting>