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mmc: core: Remove MMC_CAP2_HC_ERASE_SZ

Bläddra i källkod 
The MMC_CAP2_HC_ERASE_SZ is used only by a few mmc host drivers. Its intent
is to enable eMMC's high-capacity erase size, as to improve the behaviour
of the erase operations.

We should strive to avoid software configuration options that aren't
necessary, but instead deploy common behaviours. For these reasons, let's
remove the capability bit for MMC_CAP2_HC_ERASE_SZ and make it the default
behaviour.

Note that this change doesn't affect eMMCs supporting trim/discard, because
these commands operates on sectors and takes precedence over erase
commands.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Tested-by: Shawn Lin <shawn.lin@rock-chips.com>
This commit is contained in:
Ulf Hansson
2017-06-08 15:23:08 +02:00
förälder 9820a5b111
incheckning d2a47176a8
5 ändrade filer med 3 tillägg och 14 borttagningar
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8
drivers/mmc/core/mmc.c
Visa fil

@@ -1651,12 +1651,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
mmc_set_erase_size(card);
}
/*
* If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
* bit. This bit will be lost every time after a reset or power off.
*/
if (card->ext_csd.partition_setting_completed ||
(card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
/* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */
if (card->ext_csd.rev >= 3) {
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_ERASE_GROUP_DEF, 1,
card->ext_csd.generic_cmd6_time);

1
drivers/mmc/host/sdhci-acpi.c
Visa fil

@@ -274,7 +274,6 @@ static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
.caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY,
.caps2 = MMC_CAP2_HC_ERASE_SZ,
.flags = SDHCI_ACPI_RUNTIME_PM,
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |

3
drivers/mmc/host/sdhci-brcmstb.c
Visa fil

@@ -89,9 +89,6 @@ static int sdhci_brcmstb_probe(struct platform_device *pdev)
goto err_clk;
}
/* Enable MMC_CAP2_HC_ERASE_SZ for better max discard calculations */
host->mmc->caps2 |= MMC_CAP2_HC_ERASE_SZ;
sdhci_get_of_property(pdev);
mmc_of_parse(host->mmc);

4
drivers/mmc/host/sdhci-pci-core.c
Visa fil

@@ -347,8 +347,7 @@ static inline void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot)
{
slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE;
slot->host->mmc->caps2 |= MMC_CAP2_BOOTPART_NOACC |
MMC_CAP2_HC_ERASE_SZ;
slot->host->mmc->caps2 |= MMC_CAP2_BOOTPART_NOACC;
return 0;
}
@@ -587,7 +586,6 @@ static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot)
MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
MMC_CAP_CMD_DURING_TFR |
MMC_CAP_WAIT_WHILE_BUSY;
slot->host->mmc->caps2 |= MMC_CAP2_HC_ERASE_SZ;
slot->hw_reset = sdhci_pci_int_hw_reset;
if (slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BSW_EMMC)
slot->host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */