drivers: ata: Make RxWaterMark value as module parameter

This patch updates the driver to make Rx Fifo water mark value
as a module parameter.

Signed-off-by: Anurag Kumar Vulisha <anuragku@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/drivers/ata/ahci_ceva.c b/drivers/ata/ahci_ceva.c
index b63fab2507facc066e0fd548e06e0bb688711225..786f8673a8c5a2697aefb23d058f4a157d4dccca 100644 (file)
--- a/drivers/ata/ahci_ceva.c
+++ b/drivers/ata/ahci_ceva.c
@@ -71,6 +71,10 @@
 #define DRV_NAME       "ahci-ceva"
 #define CEVA_FLAG_BROKEN_GEN2  1
 
+static unsigned int rx_watermark = PTC_RX_WM_VAL;
+module_param(rx_watermark, uint, 0);
+MODULE_PARM_DESC(rx_watermark, "RxWaterMark value (0 - 0x80)");
+
 struct ceva_ahci_priv {
        struct platform_device *ahci_pdev;
        /* Port Phy2Cfg Register */
@@ -152,7 +156,7 @@ static void ahci_ceva_setup(struct ahci_host_priv *hpriv)
                writel(cevapriv->pp5c[i], mmio + AHCI_VEND_PP5C);
 
                /* Rx Watermark setting  */
-               tmp = PTC_RX_WM_VAL | PTC_RSVD;
+               tmp = rx_watermark | PTC_RSVD;
                writel(tmp, mmio + AHCI_VEND_PTC);
 
                /* Default to Gen 3 Speed and Gen 1 if Gen2 is broken */