linux-imx
Public
Source
committed 672647afabf63
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* under section 23.12.6.2.2, Table 23-1213 OCP2SCP TIMING Caution;64
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* As per OMAP543x TRM http://www.ti.com/lit/pdf/swpu24965
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* under section 27.3.2.2, Table 27-27 OCP2SCP TIMING Caution;66
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*67
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* Read path of OCP2SCP is not working properly due to low reset value68
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* of SYNC2 parameter in OCP2SCP. Suggested reset value is 0x6 or more.69
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*/70
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if (!of_device_is_compatible(np, "ti,am437x-ocp2scp")) {71
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);72
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regs = devm_ioremap_resource(&pdev->dev, res);73
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if (IS_ERR(regs))74
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goto err0;73
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if (IS_ERR(regs)) {74
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ret = PTR_ERR(regs);75
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goto err1;76
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}75
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pm_runtime_get_sync(&pdev->dev);77
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reg = readl_relaxed(regs + OCP2SCP_TIMING);78
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reg &= ~(SYNC2_MASK);79
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reg |= 0x6;80
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writel_relaxed(reg, regs + OCP2SCP_TIMING);81
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pm_runtime_put_sync(&pdev->dev);82
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}83
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return 0;85
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err1:89
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pm_runtime_disable(&pdev->dev);90
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err0:87
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device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);88
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return ret;90
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}91
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static int omap_ocp2scp_remove(struct platform_device *pdev)93
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{94
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pm_runtime_disable(&pdev->dev);95
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device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);