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 <adrian.hunter@intel.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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0d7d85ca6e
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f7c56ef2af
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@ -1480,7 +1480,7 @@ static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
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if (!mmc_card_mmc(card))
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return 0;
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if (card->ext_csd.boot_size) {
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if (card->ext_csd.boot_size && mmc_boot_partition_access(card->host)) {
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ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT0,
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card->ext_csd.boot_size >> 9,
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true,
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@ -215,6 +215,8 @@ static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot)
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slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA;
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slot->host->mmc->caps2 = MMC_CAP2_BOOTPART_NOACC;
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return 0;
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}
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@ -236,6 +236,10 @@ struct mmc_host {
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#define MMC_CAP_CMD23 (1 << 30) /* CMD23 supported. */
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#define MMC_CAP_HW_RESET (1 << 31) /* Hardware reset */
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unsigned int caps2; /* More host capabilities */
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#define MMC_CAP2_BOOTPART_NOACC (1 << 0) /* Boot partition no access */
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mmc_pm_flag_t pm_caps; /* supported pm features */
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#ifdef CONFIG_MMC_CLKGATE
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@ -404,4 +408,10 @@ static inline int mmc_host_cmd23(struct mmc_host *host)
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{
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return host->caps & MMC_CAP_CMD23;
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}
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static inline int mmc_boot_partition_access(struct mmc_host *host)
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{
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return !(host->caps2 & MMC_CAP2_BOOTPART_NOACC);
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}
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#endif /* LINUX_MMC_HOST_H */
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