[PATCH 5/9] ata: ceva: Make RxWaterMark value as module parameter

From	Michal Simek <michal.simek@xilinx.com>
Newsgroups	linux.kernel
Subject	[PATCH 5/9] ata: ceva: Make RxWaterMark value as module parameter
Date	2017-08-04 15:20 +0200
Message-ID	<uaKGe-7th-7@gated-at.bofh.it> (permalink)
References	<uaKGe-7th-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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From: Anurag Kumar Vulisha <anurag.kumar.vulisha@xilinx.com>

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>
---

 drivers/ata/ahci_ceva.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/ata/ahci_ceva.c b/drivers/ata/ahci_ceva.c
index b63fab2507fa..eff40ec86065 100644
--- 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, 0644);
+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 */
-- 
1.9.1

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[PATCH 5/9] ata: ceva: Make RxWaterMark value as module parameter Michal Simek <michal.simek@xilinx.com> - 2017-08-04 15:20 +0200

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