linux-kernel - [PATCH v11 3/3] PCI: artpec6: Configure FTS with dwc helper function

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Message-Id: <d862101a58286c30636a5f4671861ac4f076bfb8.1575860791.git.eswara.kota@linux.intel.com>
Date:   Mon,  9 Dec 2019 11:20:06 +0800
From:   Dilip Kota <eswara.kota@...ux.intel.com>
To:     lorenzo.pieralisi@....com, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     jingoohan1@...il.com, gustavo.pimentel@...opsys.com,
        andrew.murray@....com, robh@...nel.org,
        linux-kernel@...r.kernel.org, andriy.shevchenko@...el.com,
        cheol.yong.kim@...el.com, chuanhua.lei@...ux.intel.com,
        qi-ming.wu@...el.com, Dilip Kota <eswara.kota@...ux.intel.com>
Subject: [PATCH v11 3/3] PCI: artpec6: Configure FTS with dwc helper function

Use DesignWare helper functions to configure Fast Training
Sequence. Drop the respective code in the driver.

Signed-off-by: Dilip Kota <eswara.kota@...ux.intel.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Reviewed-by: Andrew Murray <andrew.murray@....com>
---
 drivers/pci/controller/dwc/pcie-artpec6.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-artpec6.c b/drivers/pci/controller/dwc/pcie-artpec6.c
index 9e2482bd7b6d..28d5a1095200 100644
--- a/drivers/pci/controller/dwc/pcie-artpec6.c
+++ b/drivers/pci/controller/dwc/pcie-artpec6.c
@@ -51,9 +51,6 @@ static const struct of_device_id artpec6_pcie_of_match[];
 #define ACK_N_FTS_MASK			GENMASK(15, 8)
 #define ACK_N_FTS(x)			(((x) << 8) & ACK_N_FTS_MASK)
 
-#define FAST_TRAINING_SEQ_MASK		GENMASK(7, 0)
-#define FAST_TRAINING_SEQ(x)		(((x) << 0) & FAST_TRAINING_SEQ_MASK)
-
 /* ARTPEC-6 specific registers */
 #define PCIECFG				0x18
 #define  PCIECFG_DBG_OEN		BIT(24)
@@ -313,10 +310,7 @@ static void artpec6_pcie_set_nfts(struct artpec6_pcie *artpec6_pcie)
 	 * Set the Number of Fast Training Sequences that the core
 	 * advertises as its N_FTS during Gen2 or Gen3 link training.
 	 */
-	val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
-	val &= ~FAST_TRAINING_SEQ_MASK;
-	val |= FAST_TRAINING_SEQ(180);
-	dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
+	dw_pcie_link_set_n_fts(pci, 180);
 }
 
 static void artpec6_pcie_assert_core_reset(struct artpec6_pcie *artpec6_pcie)
-- 
2.11.0