linux-kernel - [PATCH 2/2] i2c: designware: enable High-speed mode for pcidrv

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Date:	Fri,  9 Oct 2015 16:47:06 +0800
From:	wangxfdu@...il.com
To:	wangxfdu@...il.com, xiang.a.wang@...el.com, wsa@...-dreams.de,
	andriy.shevchenko@...ux.intel.com, jarkko.nikula@...ux.intel.com,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] i2c: designware: enable High-speed mode for pcidrv

From: Xiang Wang <xiang.a.wang@...el.com>

1. Support setting hs_hcnt and hs_lcnt
2. Get bus speed mode from ACPI companion of the
i2c controller.

Signed-off-by: Xiang Wang <xiang.a.wang@...el.com>
---
 drivers/i2c/busses/i2c-designware-pcidrv.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
index 6643d2d..0f4c0c4 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -54,8 +54,10 @@ enum dw_pci_ctl_id_t {
 struct dw_scl_sda_cfg {
 	u32 ss_hcnt;
 	u32 fs_hcnt;
+	u32 hs_hcnt;
 	u32 ss_lcnt;
 	u32 fs_lcnt;
+	u32 hs_lcnt;
 	u32 sda_hold;
 };
 
@@ -237,8 +239,10 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
 		cfg = controller->scl_sda_cfg;
 		dev->ss_hcnt = cfg->ss_hcnt;
 		dev->fs_hcnt = cfg->fs_hcnt;
+		dev->hs_hcnt = cfg->hs_hcnt;
 		dev->ss_lcnt = cfg->ss_lcnt;
 		dev->fs_lcnt = cfg->fs_lcnt;
+		dev->hs_lcnt = cfg->hs_lcnt;
 		dev->sda_hold_time = cfg->sda_hold;
 	}
 
@@ -246,6 +250,9 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
 
 	dev->tx_fifo_depth = controller->tx_fifo_depth;
 	dev->rx_fifo_depth = controller->rx_fifo_depth;
+
+	i2c_dw_acpi_setup_speed(&pdev->dev, dev);
+
 	r = i2c_dw_init(dev);
 	if (r)
 		return r;
-- 
2.5.3

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