generic: rtl8366: add rtl8366_smi_write_reg_noack helper

After issuing a soft reset on the RT8366{S,RB}
switch, waiting for the last acknowlegement fails
in rtl8366_smi_write_reg. Add a _noack version of
the function and use that for issuing a soft reset.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29844 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 23 insertions, 2 deletions

diff --git a/target/linux/generic/files/drivers/net/phy/rtl8366_smi.c b/target/linux/generic/files/drivers/net/phy/rtl8366_smi.c
index 971c95f83..e48ca99ce 100644
--- a/target/linux/generic/files/drivers/net/phy/rtl8366_smi.c
+++ b/target/linux/generic/files/drivers/net/phy/rtl8366_smi.c
@@ -157,6 +157,12 @@ static int rtl8366_smi_write_byte(struct rtl8366_smi *smi, u8 data)
 	return rtl8366_smi_wait_for_ack(smi);
 }
 
+static int rtl8366_smi_write_byte_noack(struct rtl8366_smi *smi, u8 data)
+{
+	rtl8366_smi_write_bits(smi, data, 8);
+	return 0;
+}
+
 static int rtl8366_smi_read_byte0(struct rtl8366_smi *smi, u8 *data)
 {
 	u32 t;
@@ -228,7 +234,8 @@ int rtl8366_smi_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data)
 }
 EXPORT_SYMBOL_GPL(rtl8366_smi_read_reg);
 
-int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data)
+static int __rtl8366_smi_write_reg(struct rtl8366_smi *smi,
+				   u32 addr, u32 data, bool ack)
 {
 	unsigned long flags;
 	int ret;
@@ -258,7 +265,10 @@ int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data)
 		goto out;
 
 	/* write DATA[15:8] */
-	ret = rtl8366_smi_write_byte(smi, data >> 8);
+	if (ack)
+		ret = rtl8366_smi_write_byte(smi, data >> 8);
+	else
+		ret = rtl8366_smi_write_byte_noack(smi, data >> 8);
 	if (ret)
 		goto out;
 
@@ -270,8 +280,19 @@ int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data)
 
 	return ret;
 }
+
+int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data)
+{
+	return __rtl8366_smi_write_reg(smi, addr, data, true);
+}
 EXPORT_SYMBOL_GPL(rtl8366_smi_write_reg);
 
+int rtl8366_smi_write_reg_noack(struct rtl8366_smi *smi, u32 addr, u32 data)
+{
+	return __rtl8366_smi_write_reg(smi, addr, data, false);
+}
+EXPORT_SYMBOL_GPL(rtl8366_smi_write_reg_noack);
+
 int rtl8366_smi_rmwr(struct rtl8366_smi *smi, u32 addr, u32 mask, u32 data)
 {
 	u32 t;