For some devices that have slightly different firmware implementation it's good to see what's going on when communicating with the SCU. Add a few debug messages for that purpose.
Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com --- arch/x86/lib/scu.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/arch/x86/lib/scu.c b/arch/x86/lib/scu.c index 90ef239bcd3d..c7274e064647 100644 --- a/arch/x86/lib/scu.c +++ b/arch/x86/lib/scu.c @@ -11,6 +11,7 @@ */ #include <common.h> #include <dm.h> +#include <hexdump.h> #include <regmap.h> #include <syscon.h> #include <asm/cpu.h> @@ -48,6 +49,7 @@ struct scu { */ static void scu_ipc_send_command(struct ipc_regs *regs, u32 cmd) { + debug("%s(): 0x%08x\n", __func__, cmd); writel(cmd, ®s->cmd); }
@@ -92,12 +94,18 @@ static int scu_ipc_cmd(struct ipc_regs *regs, u32 cmd, u32 sub, for (i = 0; i < inlen; i++) writel(*in++, ®s->wbuf[i]);
+ debug_hex_dump("SCU in", DUMP_PREFIX_OFFSET, 16, 4, in, inlen * 4, false); + scu_ipc_send_command(regs, (inlen << 16) | (sub << 12) | cmd); err = scu_ipc_check_status(regs);
if (!err) { + u32 *buf = out; + for (i = 0; i < outlen; i++) *out++ = readl(®s->rbuf[i]); + + debug_hex_dump("SCU out", DUMP_PREFIX_OFFSET, 16, 4, buf, outlen * 4, false); }
return err;