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ata: ahci_tegra: disable devslp for Tegra124

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Tegra124 does not support devslp and it should be disabled.

Signed-off-by: Preetham Chandru R <pchandru@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Preetham Ramchandra 2018-03-12 17:10:35 +05:30 committed by Tejun Heo
parent 43ee827b56
commit 502717ccf7
1 changed files with 26 additions and 0 deletions
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26
drivers/ata/ahci_tegra.c
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@ -166,12 +166,14 @@ struct tegra_ahci_ops {
struct tegra_ahci_soc {
const char *const *supply_names;
u32 num_supplies;
bool supports_devslp;
const 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 +183,18 @@ struct tegra_ahci_priv {
const struct tegra_ahci_soc *soc;
};
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->supports_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;
@ -401,6 +415,7 @@ 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 */
@ -446,6 +461,7 @@ static const struct tegra_ahci_ops tegra124_ahci_ops = {
static const struct tegra_ahci_soc tegra124_ahci_soc = {
.supply_names = tegra124_supply_names,
.num_supplies = ARRAY_SIZE(tegra124_supply_names),
.supports_devslp = false,
.ops = &tegra124_ahci_ops,
};
@ -488,6 +504,16 @@ static int tegra_ahci_probe(struct platform_device *pdev)
if (IS_ERR(tegra->sata_regs))
return PTR_ERR(tegra->sata_regs);
/*
* AUX registers is optional.
*/
res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
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)) {
dev_err(&pdev->dev, "Failed to get sata reset\n");