diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-brcmstb.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-brcmstb.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-brcmstb.c b/drivers/i2c/busses/i2c-brcmstb.c index 506991596b68..169a2836922d 100644 --- a/drivers/i2c/busses/i2c-brcmstb.c +++ b/drivers/i2c/busses/i2c-brcmstb.c @@ -580,6 +580,31 @@ static void brcmstb_i2c_set_bsc_reg_defaults(struct brcmstb_i2c_dev *dev) brcmstb_i2c_set_bus_speed(dev); } +#define AUTOI2C_CTRL0 0x26c +#define AUTOI2C_CTRL0_RELEASE_BSC BIT(1) + +static int bcm2711_release_bsc(struct brcmstb_i2c_dev *dev) +{ + struct platform_device *pdev = to_platform_device(dev->device); + struct resource *iomem; + void __iomem *autoi2c; + + /* Map hardware registers */ + iomem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "auto-i2c"); + autoi2c = devm_ioremap_resource(&pdev->dev, iomem); + if (IS_ERR(autoi2c)) + return PTR_ERR(autoi2c); + + writel(AUTOI2C_CTRL0_RELEASE_BSC, autoi2c + AUTOI2C_CTRL0); + devm_iounmap(&pdev->dev, autoi2c); + + /* We need to reset the controller after the release */ + dev->bsc_regmap->iic_enable = 0; + bsc_writel(dev, dev->bsc_regmap->iic_enable, iic_enable); + + return 0; +} + static int brcmstb_i2c_probe(struct platform_device *pdev) { int rc = 0; @@ -609,6 +634,13 @@ static int brcmstb_i2c_probe(struct platform_device *pdev) goto probe_errorout; } + if (of_device_is_compatible(dev->device->of_node, + "brcm,bcm2711-hdmi-i2c")) { + rc = bcm2711_release_bsc(dev); + if (rc) + goto probe_errorout; + } + rc = of_property_read_string(dev->device->of_node, "interrupt-names", &int_name); if (rc < 0) @@ -705,6 +737,7 @@ static SIMPLE_DEV_PM_OPS(brcmstb_i2c_pm, brcmstb_i2c_suspend, static const struct of_device_id brcmstb_i2c_of_match[] = { {.compatible = "brcm,brcmstb-i2c"}, {.compatible = "brcm,brcmper-i2c"}, + {.compatible = "brcm,bcm2711-hdmi-i2c"}, {}, }; MODULE_DEVICE_TABLE(of, brcmstb_i2c_of_match); |