[PATCH net-next 23/30] net: dsa: mt7530: run mt7530_pll_setup() only with 40 MHz XTAL

[arinc9 . unal]

From: Arınç ÜNAL <arinc.unal@xxxxxxxxxx>

The code on mt7530_pll_setup() needs to be run only on the MT7530 switch
with a 40 MHz oscillator. Introduce a check to do this.

Link: https://github.com/BPI-SINOVOIP/BPI-R2-bsp/blob/4a5dd143f2172ec97a2872fa29c7c4cd520f45b5/linux-mt/drivers/net/ethernet/mediatek/gsw_mt7623.c#L1039
Tested-by: Arınç ÜNAL <arinc.unal@xxxxxxxxxx>
Signed-off-by: Arınç ÜNAL <arinc.unal@xxxxxxxxxx>
---
 drivers/net/dsa/mt7530.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 19afcd914109..9a4d4413287a 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -2197,7 +2197,8 @@ mt7530_setup(struct dsa_switch *ds)
 		     SYS_CTRL_PHY_RST | SYS_CTRL_SW_RST |
 		     SYS_CTRL_REG_RST);
 
-	mt7530_pll_setup(priv);
+	if (xtal == HWTRAP_XTAL_40MHZ)
+		mt7530_pll_setup(priv);
 
 	/* Lower P5 RGMII Tx driving, 8mA */
 	mt7530_write(priv, MT7530_IO_DRV_CR,
-- 
2.39.2