From f7c56ef2af5ae7e4c24c3c79427b38d18ba1d294 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Fri, 23 Sep 2011 12:48:21 +0300 Subject: [PATCH] mmc: block: support no access to boot partitions Intel Medfield platform blocks access to eMMC boot partitions which results in switch errors. Since there is no access, mmcboot0/1 devices should not be created. Add a host capability to reflect that. Signed-off-by: Adrian Hunter Signed-off-by: Chris Ball --- drivers/mmc/card/block.c | 2 +- drivers/mmc/host/sdhci-pci.c | 2 ++ include/linux/mmc/host.h | 10 ++++++++++ 3 files changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index d7eb2c082336..aa66d3f3abb1 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -1480,7 +1480,7 @@ static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md) if (!mmc_card_mmc(card)) return 0; - if (card->ext_csd.boot_size) { + if (card->ext_csd.boot_size && mmc_boot_partition_access(card->host)) { ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT0, card->ext_csd.boot_size >> 9, true, diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c index 3b30c515cbc2..f8a17f98f3a9 100644 --- a/drivers/mmc/host/sdhci-pci.c +++ b/drivers/mmc/host/sdhci-pci.c @@ -215,6 +215,8 @@ static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot) slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA; + slot->host->mmc->caps2 = MMC_CAP2_BOOTPART_NOACC; + return 0; } diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index b2aefea97048..aed5bc7245f7 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -236,6 +236,10 @@ struct mmc_host { #define MMC_CAP_CMD23 (1 << 30) /* CMD23 supported. */ #define MMC_CAP_HW_RESET (1 << 31) /* Hardware reset */ + unsigned int caps2; /* More host capabilities */ + +#define MMC_CAP2_BOOTPART_NOACC (1 << 0) /* Boot partition no access */ + mmc_pm_flag_t pm_caps; /* supported pm features */ #ifdef CONFIG_MMC_CLKGATE @@ -404,4 +408,10 @@ static inline int mmc_host_cmd23(struct mmc_host *host) { return host->caps & MMC_CAP_CMD23; } + +static inline int mmc_boot_partition_access(struct mmc_host *host) +{ + return !(host->caps2 & MMC_CAP2_BOOTPART_NOACC); +} + #endif /* LINUX_MMC_HOST_H */ -- 2.20.1