ata: ahci_tegra: Read calibration fuse (e327f115) · Commits · 戴 / test

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:

Mikko Perttunen <mperttunen@nvidia.com> Acked-by:

Thierry Reding <treding@nvidia.com> Signed-off-by:

Tejun Heo <tj@kernel.org>

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];

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