diff options
| author | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2018-10-31 12:35:12 +0100 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2018-10-31 12:35:12 +0100 |
| commit | 4b2d05c05c9e775abf7218ad7a4b52c2d220dd14 (patch) | |
| tree | 87c7af5fcbbd0715d530329c00863385e2ac6b7c | |
| parent | 4327a27b34c2c83b7998087e7cad928272aa1d4d (diff) | |
ata: imx: add external clock support for i.MX8QM
Add external reference clock via clock tree. This allows to model
the shared reference clock provided via PCIE_SATA_REFCLK100M_P/N
properly.
This is analogous to what we did for PCIe in commit db22e7590338
("PCI: imx6: add external clock support for i.MX8QM").
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
| -rw-r--r-- | drivers/ata/ahci_imx.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c index 7cff0f9c285d..df11b5119958 100644 --- a/drivers/ata/ahci_imx.c +++ b/drivers/ata/ahci_imx.c @@ -104,6 +104,7 @@ struct imx_ahci_priv { struct clk *epcs_rx_clk; struct clk *phy_pclk0; struct clk *phy_pclk1; + struct clk *sata_ext; int clkreq_gpio; struct regmap *gpr; bool no_device; @@ -443,10 +444,14 @@ static int imx_sata_enable(struct ahci_host_priv *hpriv) if (ret) return ret; - ret = clk_prepare_enable(imxpriv->sata_ref_clk); + ret = clk_prepare_enable(imxpriv->sata_ext); if (ret < 0) goto disable_regulator; + ret = clk_prepare_enable(imxpriv->sata_ref_clk); + if (ret < 0) + goto disable_ext; + if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) { /* * set PHY Paremeters, two steps to configure the GPR13, @@ -501,6 +506,8 @@ static int imx_sata_enable(struct ahci_host_priv *hpriv) disable_clk: clk_disable_unprepare(imxpriv->sata_ref_clk); +disable_ext: + clk_disable_unprepare(imxpriv->sata_ext); disable_regulator: ahci_platform_disable_regulators(hpriv); @@ -532,6 +539,8 @@ static void imx_sata_disable(struct ahci_host_priv *hpriv) } clk_disable_unprepare(imxpriv->sata_ref_clk); + clk_disable_unprepare(imxpriv->sata_ext); + ahci_platform_disable_regulators(hpriv); } @@ -853,6 +862,12 @@ static int imx_ahci_probe(struct platform_device *pdev) return PTR_ERR(imxpriv->sata_clk); } + imxpriv->sata_ext = devm_clk_get(dev, "sata_ext"); + if (IS_ERR(imxpriv->sata_ext)) { + dev_err(dev, "can't get sata_ext clock.\n"); + return PTR_ERR(imxpriv->sata_ext); + } + imxpriv->sata_ref_clk = devm_clk_get(dev, "sata_ref"); if (IS_ERR(imxpriv->sata_ref_clk)) { dev_err(dev, "can't get sata_ref clock.\n"); |