diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/sdhci-msm.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index a21dde2d694e..8c077135d1c2 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -101,6 +101,10 @@ static const u32 tuning_block_128[] = { 0xFFFFBBBB, 0xFFFF77FF, 0xFF7777FF, 0xEEDDBB77 }; +static int disable_slots; +/* root can write, others read */ +module_param(disable_slots, int, S_IRUGO|S_IWUSR); + /* This structure keeps information per regulator */ struct sdhci_msm_reg_data { /* voltage regulator handle */ @@ -2029,6 +2033,19 @@ static int sdhci_msm_probe(struct platform_device *pdev) /* Extract platform data */ if (pdev->dev.of_node) { + ret = of_alias_get_id(pdev->dev.of_node, "sdhc"); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to get slot index %d\n", + ret); + goto pltfm_free; + } + if (disable_slots & (1 << (ret - 1))) { + dev_info(&pdev->dev, "%s: Slot %d disabled\n", __func__, + ret); + ret = -ENODEV; + goto pltfm_free; + } + msm_host->pdata = sdhci_msm_populate_pdata(&pdev->dev); if (!msm_host->pdata) { dev_err(&pdev->dev, "DT parsing error\n"); |