PERIPH_ID_SDMMC4(131) is not continous value with PERIPH_ID_SDMMC0(75). If there is no 'index' property in fdt, then dev_index should be assigned to dev_id(Peripheral ID). At this time, dev_index should be "56". It means Exynos SoC has "56" numbers of DWMMC IP. To prevent this behavior, it needs to check the maximum device index.
Signed-off-by: Jaehoon Chung jh80.chung@samsung.com --- drivers/mmc/exynos_dw_mmc.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/mmc/exynos_dw_mmc.c b/drivers/mmc/exynos_dw_mmc.c index 80d17ad..5860023 100644 --- a/drivers/mmc/exynos_dw_mmc.c +++ b/drivers/mmc/exynos_dw_mmc.c @@ -160,6 +160,11 @@ static int exynos_dwmci_get_config(const void *blob, int node, if (host->dev_index == host->dev_id) host->dev_index = host->dev_id - PERIPH_ID_SDMMC0;
+ if (host->dev_index > 4) { + printf("DWMMC%d: Can't get the dev index\n", host->dev_index); + return -EINVAL; + } + /* Get the bus width from the device node */ host->buswidth = fdtdec_get_int(blob, node, "samsung,bus-width", 0); if (host->buswidth <= 0) {