From: Preetham Ramchandra <pchandru@xxxxxxxxxx>
t124 does not support devslp and it should be
disabled.
Signed-off-by: Preetham Chandru R <pchandru@xxxxxxxxxx>
---
drivers/ata/ahci_tegra.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/ata/ahci_tegra.c b/drivers/ata/ahci_tegra.c
index 6aaf8a4571c8..62f2afb54789 100644
--- a/drivers/ata/ahci_tegra.c
+++ b/drivers/ata/ahci_tegra.c
@@ -145,6 +145,10 @@
#define FUSE_SATA_CALIB 0x124
#define FUSE_SATA_CALIB_MASK 0x3
+enum {
+ NO_DEVSLP = (1 << 0),
+};
+
struct sata_pad_calibration {
u8 gen1_tx_amp;
u8 gen1_tx_peak;
@@ -166,12 +170,14 @@ struct tegra_ahci_ops {
struct tegra_ahci_soc {
const char *const *supply_names;
u32 num_supplies;
+ u32 quirks;
struct tegra_ahci_ops ops;
};
struct tegra_ahci_priv {
struct platform_device *pdev;
void __iomem *sata_regs;
+ void __iomem *sata_aux_regs;
struct reset_control *sata_rst;
struct reset_control *sata_oob_rst;
struct reset_control *sata_cold_rst;
@@ -181,6 +187,18 @@ struct tegra_ahci_priv {
struct tegra_ahci_soc *soc_data;
};
+static void tegra_ahci_handle_quirks(struct ahci_host_priv *hpriv)
+{
+ struct tegra_ahci_priv *tegra = hpriv->plat_data;
+ u32 val;
+
+ if (tegra->sata_aux_regs && (tegra->soc_data->quirks & NO_DEVSLP)) {
+ val = readl(tegra->sata_aux_regs + SATA_AUX_MISC_CNTL_1_0);
+ val &= ~SATA_AUX_MISC_CNTL_1_0_SDS_SUPPORT;
+ writel(val, tegra->sata_aux_regs + SATA_AUX_MISC_CNTL_1_0);
+ }
+}
+
static int tegra124_ahci_init(struct ahci_host_priv *hpriv)
{
struct tegra_ahci_priv *tegra = hpriv->plat_data;
@@ -400,6 +418,7 @@ static int tegra_ahci_controller_init(struct ahci_host_priv *hpriv)
val &= ~SATA_CONFIGURATION_0_CLK_OVERRIDE;
writel(val, tegra->sata_regs + SATA_CONFIGURATION_0);
+ tegra_ahci_handle_quirks(hpriv);
/* Unmask SATA interrupts */
@@ -441,6 +460,7 @@ static const char *const tegra124_supply_names[] = {
static const struct tegra_ahci_soc tegra124_ahci_soc_data = {
.supply_names = tegra124_supply_names,
.num_supplies = ARRAY_SIZE(tegra124_supply_names),
+ .quirks = NO_DEVSLP,
.ops = {
.init = tegra124_ahci_init,
},
@@ -485,6 +505,15 @@ static int tegra_ahci_probe(struct platform_device *pdev)
tegra->sata_regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(tegra->sata_regs))
return PTR_ERR(tegra->sata_regs);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+ /*
+ * Aux register is optional.
+ */
+ if (res) {
+ tegra->sata_aux_regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(tegra->sata_aux_regs))
+ return PTR_ERR(tegra->sata_aux_regs);
+ }
tegra->sata_rst = devm_reset_control_get(&pdev->dev, "sata");
if (IS_ERR(tegra->sata_rst)) {
--
2.7.4
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