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MLK-20125 ata: imx: add one ext_osc parameter for imx8qm ahci 

Add one parameter to distinguish the different ref_clk
source, internal pll or the external osc.
NOTE: The value of the ext_osc should be aligned to the one
of the pcie's, since both of them share one ref_clk source.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
pull/10/head
Richard Zhu 2018-10-30 15:20:50 +08:00
parent 55404c622a
commit eafdf0d85b
1 changed files with 33 additions and 12 deletions
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45
drivers/ata/ahci_imx.c
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@ -151,6 +151,7 @@ struct imx_ahci_priv {
bool first_time;
u32 phy_params;
u32 imped_ratio;
u32 ext_osc;
};
void *sg_io_buffer_hack;
@ -560,18 +561,32 @@ static int imx8_sata_enable(struct ahci_host_priv *hpriv)
IMX8QM_PHY_MODE_MASK,
IMX8QM_PHY_MODE_SATA);
/*
* bit0 rx ena 1, bit1 tx ena 0
* bit12 PHY_X1_EPCS_SEL 1.
*/
regmap_update_bits(imxpriv->gpr,
IMX8QM_CSR_MISC_OFFSET,
IMX8QM_MISC_IOB_RXENA,
IMX8QM_MISC_IOB_RXENA);
regmap_update_bits(imxpriv->gpr,
IMX8QM_CSR_MISC_OFFSET,
IMX8QM_MISC_IOB_TXENA,
0);
if (imxpriv->ext_osc) {
dev_info(dev, "external osc is used.\n");
/*
* bit0 rx ena 1, bit1 tx ena 0
* bit12 PHY_X1_EPCS_SEL 1.
*/
regmap_update_bits(imxpriv->gpr,
IMX8QM_CSR_MISC_OFFSET,
IMX8QM_MISC_IOB_RXENA,
IMX8QM_MISC_IOB_RXENA);
regmap_update_bits(imxpriv->gpr,
IMX8QM_CSR_MISC_OFFSET,
IMX8QM_MISC_IOB_TXENA,
0);
} else {
dev_info(dev, "internal pll is used.\n");
regmap_update_bits(imxpriv->gpr,
IMX8QM_CSR_MISC_OFFSET,
IMX8QM_MISC_IOB_RXENA,
0);
regmap_update_bits(imxpriv->gpr,
IMX8QM_CSR_MISC_OFFSET,
IMX8QM_MISC_IOB_TXENA,
IMX8QM_MISC_IOB_TXENA);
}
regmap_update_bits(imxpriv->gpr,
IMX8QM_CSR_MISC_OFFSET,
IMX8QM_MISC_PHYX1_EPCS_SEL,
@ -1077,6 +1092,12 @@ static int imx8_sata_probe(struct device *dev, struct imx_ahci_priv *imxpriv)
struct platform_device *pdev = imxpriv->ahci_pdev;
struct device_node *np = dev->of_node;
if (of_property_read_u32(np, "ext_osc", &imxpriv->ext_osc) < 0) {
dev_info(dev, "ext_osc is not specified.\n");
/* Use the external osc as ref clk defaultly. */
imxpriv->ext_osc = 1;
}
if (of_property_read_u32(np, "fsl,phy-imp", &imxpriv->imped_ratio)) {
/*
* Regarding to the differnet Hw designs,