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Commit e327f115 authored by Mikko Perttunen's avatar Mikko Perttunen Committed by Tejun Heo
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ata: ahci_tegra: Read calibration fuse 



The original version of the driver did not read the SATA calibration
fuse to remove the dependency to the fuse driver. The fuse driver
is now merged, so add this functionality.

The calibration fuse contains a 2-bit value used to pick a set
of calibration values for the SATA pad.

Signed-off-by: default avatarMikko Perttunen <mperttunen@nvidia.com>
Acked-by: default avatarThierry Reding <treding@nvidia.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 2a13772a

drivers/ata/ahci_tegra.c

+10 −4
Original line number Diff line number Diff line
@@ -18,14 +18,17 @@ 
 */



#include <linux/ahci_platform.h>

#include <linux/reset.h>

#include <linux/errno.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/regulator/consumer.h>

#include <linux/reset.h>



#include <soc/tegra/fuse.h>

#include <soc/tegra/pmc.h>



#include "ahci.h"



#define SATA_CONFIGURATION_0				0x180
@@ -180,9 +183,12 @@ static int tegra_ahci_controller_init(struct ahci_host_priv *hpriv) 


	/* Pad calibration */



	/* FIXME Always use calibration 0. Change this to read the calibration

	 * fuse once the fuse driver has landed. */

	val = 0;

	ret = tegra_fuse_readl(FUSE_SATA_CALIB, &val);

	if (ret) {

		dev_err(&tegra->pdev->dev,

			"failed to read calibration fuse: %d\n", ret);

		return ret;

	}



	calib = tegra124_pad_calibration[val & FUSE_SATA_CALIB_MASK];