[U-Boot] [PATCH] mvebu: a38x: Force receiver detected on PCIe lanes

[Baruch Siach]

From: Rabeeh Khoury <rabeeh at solid-run.com>

Some QCA988x based modules presence is not detected by the SERDES lanes,
so force this detection which will trigger the LTSSM state machine to
negotiate link.

An example of such a card is WLE900VX.

Signed-off-by: Rabeeh Khoury <rabeeh at solid-run.com>
Signed-off-by: Baruch Siach <baruch at tkos.co.il>
---
 arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c | 2 ++
 arch/arm/mach-mvebu/serdes/a38x/sys_env_lib.h         | 1 +
 2 files changed, 3 insertions(+)

diff --git a/arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c b/arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c
index 13553cf96008..33e70569bc48 100644
--- a/arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c
+++ b/arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c
@@ -597,6 +597,8 @@ struct op_params pex_electrical_config_serdes_rev2_params[] = {
 	{LANE_CFG4_REG, 0x800, 0x8, {0x8}, 0, 0},
 	/* tximpcal_th and rximpcal_th */
 	{VTHIMPCAL_CTRL_REG, 0x800, 0xff00, {0x3000}, 0, 0},
+	/* Force receiver detected */
+	{LANE_CFG0_REG, 0x800, 0x8000, {0x8000}, 0, 0},
 };
 
 /* PEX - configuration seq for REF_CLOCK_25MHz */
diff --git a/arch/arm/mach-mvebu/serdes/a38x/sys_env_lib.h b/arch/arm/mach-mvebu/serdes/a38x/sys_env_lib.h
index 953445b7d7ae..50b235826659 100644
--- a/arch/arm/mach-mvebu/serdes/a38x/sys_env_lib.h
+++ b/arch/arm/mach-mvebu/serdes/a38x/sys_env_lib.h
@@ -71,6 +71,7 @@
 #define RX_REG3				0xa0188
 #define PCIE_REG1			0xa0288
 #define PCIE_REG3			0xa0290
+#define LANE_CFG0_REG			0xa0600
 #define LANE_CFG1_REG			0xa0604
 #define LANE_CFG4_REG			0xa0620
 #define LANE_CFG5_REG			0xa0624
-- 
2.17.0