diff options
| author | Richard Zhu <hongxing.zhu@nxp.com> | 2018-03-19 05:02:18 +0300 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2018-03-19 17:34:08 +0300 |
| commit | e5878732a521dd31ea6377875e49adc424503e5b (patch) | |
| tree | 76fe4690380b6067e22d201272789c8eb45f2cfb /drivers/ata/ahci_imx.c | |
| parent | 34d232eb2d0947f1a5430cbb193781e6562496ce (diff) | |
| download | linux-e5878732a521dd31ea6377875e49adc424503e5b.tar.xz | |
ahci: imx: add the imx6qp ahci sata support
- Regarding to imx6q ahci sata, imx6qp ahci sata
has the reset mechanism. Add the imx6qp ahci sata
support in this commit.
- Use the specific reset callback for imx53 sata,
and use the default ahci_ops.softreset for the others.
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata/ahci_imx.c')
| -rw-r--r-- | drivers/ata/ahci_imx.c | 36 |
1 files changed, 32 insertions, 4 deletions
diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c index a58bcc069c54..577458fe4aa9 100644 --- a/drivers/ata/ahci_imx.c +++ b/drivers/ata/ahci_imx.c @@ -58,6 +58,7 @@ enum { enum ahci_imx_type { AHCI_IMX53, AHCI_IMX6Q, + AHCI_IMX6QP, }; struct imx_ahci_priv { @@ -188,11 +189,26 @@ static int imx_phy_reg_read(u16 *val, void __iomem *mmio) static int imx_sata_phy_reset(struct ahci_host_priv *hpriv) { + struct imx_ahci_priv *imxpriv = hpriv->plat_data; void __iomem *mmio = hpriv->mmio; int timeout = 10; u16 val; int ret; + if (imxpriv->type == AHCI_IMX6QP) { + /* 6qp adds the sata reset mechanism, use it for 6qp sata */ + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, + IMX6Q_GPR5_SATA_SW_PD, 0); + + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, + IMX6Q_GPR5_SATA_SW_RST, 0); + udelay(50); + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, + IMX6Q_GPR5_SATA_SW_RST, + IMX6Q_GPR5_SATA_SW_RST); + return 0; + } + /* Reset SATA PHY by setting RESET bit of PHY register CLOCK_RESET */ ret = imx_phy_reg_addressing(IMX_CLOCK_RESET, mmio); if (ret) @@ -408,7 +424,7 @@ static int imx_sata_enable(struct ahci_host_priv *hpriv) if (ret < 0) goto disable_regulator; - if (imxpriv->type == AHCI_IMX6Q) { + if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) { /* * set PHY Paremeters, two steps to configure the GPR13, * one write for rest of parameters, mask of first write @@ -459,10 +475,21 @@ static void imx_sata_disable(struct ahci_host_priv *hpriv) if (imxpriv->no_device) return; - if (imxpriv->type == AHCI_IMX6Q) { + switch (imxpriv->type) { + case AHCI_IMX6QP: + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5, + IMX6Q_GPR5_SATA_SW_PD, + IMX6Q_GPR5_SATA_SW_PD); regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, IMX6Q_GPR13_SATA_MPLL_CLK_EN, !IMX6Q_GPR13_SATA_MPLL_CLK_EN); + break; + + case AHCI_IMX6Q: + regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, + IMX6Q_GPR13_SATA_MPLL_CLK_EN, + !IMX6Q_GPR13_SATA_MPLL_CLK_EN); + break; } clk_disable_unprepare(imxpriv->sata_ref_clk); @@ -513,7 +540,7 @@ static int ahci_imx_softreset(struct ata_link *link, unsigned int *class, if (imxpriv->type == AHCI_IMX53) ret = ahci_pmp_retry_srst_ops.softreset(link, class, deadline); - else if (imxpriv->type == AHCI_IMX6Q) + else ret = ahci_ops.softreset(link, class, deadline); return ret; @@ -536,6 +563,7 @@ static const struct ata_port_info ahci_imx_port_info = { static const struct of_device_id imx_ahci_of_match[] = { { .compatible = "fsl,imx53-ahci", .data = (void *)AHCI_IMX53 }, { .compatible = "fsl,imx6q-ahci", .data = (void *)AHCI_IMX6Q }, + { .compatible = "fsl,imx6qp-ahci", .data = (void *)AHCI_IMX6QP }, {}, }; MODULE_DEVICE_TABLE(of, imx_ahci_of_match); @@ -743,7 +771,7 @@ static int imx_ahci_probe(struct platform_device *pdev) return PTR_ERR(imxpriv->ahb_clk); } - if (imxpriv->type == AHCI_IMX6Q) { + if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) { u32 reg_value; imxpriv->gpr = syscon_regmap_lookup_by_compatible( |