[PATCH v2 1/2] arm: mvebu: clearfog gtr: add config option to select serdes0 interface

[Josua Mayer]

Clearfog GTR has an assembly option for a SATA connector, CON18.
It shares the serdes with mini-pcie connector CON3.

Add new kconfig option to select betweenata and pci, defaulting to pci
as it was previously configured in board-file.

Clearfog GTR connects eth2 / serdes 1 to a 2.5Gbps capable ethernet
switch port. Linux already configures a fixed-link at speed 2500 from
device-tree.
Upgrade serdes 1 rate to 3.125Gbps to support a 2.5Gbps network link on
Clearfog GTR.

Signed-off-by: Josua Mayer <josua at solid-run.com>
---
 board/solidrun/clearfog/Kconfig    | 19 +++++++++++++++++++
 board/solidrun/clearfog/clearfog.c | 11 ++++++++---
 2 files changed, 27 insertions(+), 3 deletions(-)

diff --git a/board/solidrun/clearfog/Kconfig b/board/solidrun/clearfog/Kconfig
index 60d3921307..b1623038d0 100644
--- a/board/solidrun/clearfog/Kconfig
+++ b/board/solidrun/clearfog/Kconfig
@@ -39,6 +39,25 @@ config CLEARFOG_SFP_25GB
 	  SGMII connection (requires a supporting SFP). By default, transfer speed
 	  of 1.25 Gbps is used, suitable for a more common 1 Gbps SFP module.
 
+choice CLEARFOG_GTR_SERDES0
+	prompt "Select Clearfog GTR SerDes 0 Function"
+	default CLEARFOG_GTR_SERDES0_PCIE
+	help
+	  Select function for SerDes 0 which is shared between CON3 and CON18
+	  for either pci-e or sata.
+
+config CLEARFOG_GTR_SERDES0_PCIE
+	bool "PCI-E on CON3"
+	help
+	  Configure SerDes 0 for PCI-E to enable CON3 mini-PCI-E connector.
+
+config CLEARFOG_GTR_SERDES0_SATA
+	bool "SATA on CON18"
+	help
+	  Configure SerDes 0 for SATA to enable CON18 SATA connector.
+
+endchoice
+
 config ENV_SIZE
 	hex "Environment Size"
 	default 0x10000
diff --git a/board/solidrun/clearfog/clearfog.c b/board/solidrun/clearfog/clearfog.c
index 6fa2fe5fe3..51c5be518a 100644
--- a/board/solidrun/clearfog/clearfog.c
+++ b/board/solidrun/clearfog/clearfog.c
@@ -90,9 +90,14 @@ int hws_board_topology_load(struct serdes_map **serdes_map_array, u8 *count)
 
 	/* Apply runtime detection changes */
 	if (sr_product_is(&cf_tlv_data, "Clearfog GTR")) {
-		board_serdes_map[0].serdes_type = PEX0;
-		board_serdes_map[0].serdes_speed = SERDES_SPEED_5_GBPS;
-		board_serdes_map[0].serdes_mode = PEX_ROOT_COMPLEX_X1;
+		if (IS_ENABLED(CONFIG_CLEARFOG_GTR_SERDES0_SATA)) {
+			/* serdes 0 is sata (like clearfog pro) */
+		} else if (IS_ENABLED(CONFIG_CLEARFOG_GTR_SERDES0_PCIE)) {
+			/* serdes 0 is pci */
+			board_serdes_map[0].serdes_type = PEX0;
+			board_serdes_map[0].serdes_speed = SERDES_SPEED_5_GBPS;
+			board_serdes_map[0].serdes_mode = PEX_ROOT_COMPLEX_X1;
+		}
 	} else if (sr_product_is(&cf_tlv_data, "Clearfog Pro")) {
 		/* handle recognized product as noop, no adjustment required */
 	} else if (sr_product_is(&cf_tlv_data, "Clearfog Base")) {

-- 
2.35.3