[Qemu-devel] [PATCH] LAN9118: Handling write to BYTE_TEST register

[Bertrand Cachet]

Prevent LAN9118 driver to finish in hardware error when writing
to the BYTE_TEST register.

This register (even if ReadOnly) is used to wake-up the device when it is in
low power consumption mode.

Add case for BYTE_TEST  in lan9118_writel method. Just write some documentation
explaining use its use.

Signed-off-by: Bertrand Cachet <address@hidden>
---
 hw/lan9118.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/hw/lan9118.c b/hw/lan9118.c
index f8149e6..65096d4 100644
--- a/hw/lan9118.c
+++ b/hw/lan9118.c
@@ -977,6 +977,15 @@ static void lan9118_writel(void *opaque, 
target_phys_addr_t offset,
         s->pmt_ctrl &= ~0x34e;
         s->pmt_ctrl |= (val & 0x34e);
         break;
+    case CSR_BYTE_TEST:
+        /* Even if this register is marked ReadOnly in the datasheet,
+           a write to this register will wake up the device when 
+           PM_MODE is currently in D1 or D2 mode.
+
+           As Power Modes are not handled in this driver, we will 
+           leave this case with no implementation.
+         */
+        break;
     case CSR_GPIO_CFG:
         /* Probably just enabling LEDs.  */
         s->gpio_cfg = val & 0x7777071f;
-- 
1.7.5.4