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mmc: msm_sdcc: Update hw_reset functionality for resetting SD card

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Some targets whose regulators are controlled through platform-data in
the board files. Add support for such SDC slots to enable hw_reset
functionality

Change-Id: I5033cd96f8816008ee7fa546bd81d83a33373299
Signed-off-by: Pratibhasagar V <pratibha@codeaurora.org>
This commit is contained in:
Pratibhasagar V
2013-02-14 10:49:29 -08:00
committed by Jay Chokshi
parent f57880a55f
commit 1aa03dce3e
1 changed files with 33 additions and 28 deletions
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drivers/mmc/host/msm_sdcc.c
+33 -28
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@@ -4280,35 +4280,40 @@ void msmsdcc_hw_reset(struct mmc_host *mmc)
if (!card || !mmc_card_sd(card))
return;
/*
* Continuing on failing to disable regulator would lead to a panic
* anyway, since the commands would fail and console would be flooded
* with prints, eventually leading to a watchdog bark
*/
rc = msmsdcc_setup_vreg(host, false, false);
if (rc) {
pr_err("%s: %s disable regulator: failed: %d\n",
mmc_hostname(mmc), __func__, rc);
BUG_ON(rc);
pr_debug("%s: Starting h/w reset\n", mmc_hostname(host->mmc));
if (host->plat->translate_vdd || host->plat->vreg_data) {
/* Disable the regulators */
if (host->plat->translate_vdd)
rc = host->plat->translate_vdd(mmc_dev(mmc), 0);
else if (host->plat->vreg_data)
rc = msmsdcc_setup_vreg(host, false, false);
if (rc) {
pr_err("%s: Failed to disable voltage regulator\n",
mmc_hostname(host->mmc));
BUG_ON(rc);
}
/* 10ms delay for supply to reach the desired voltage level */
usleep_range(10000, 12000);
/* Enable the regulators */
if (host->plat->translate_vdd)
rc = host->plat->translate_vdd(mmc_dev(mmc), 1);
else if (host->plat->vreg_data)
rc = msmsdcc_setup_vreg(host, true, false);
if (rc) {
pr_err("%s: Failed to enable voltage regulator\n",
mmc_hostname(host->mmc));
BUG_ON(rc);
}
/* 10ms delay for supply to reach the desired voltage level */
usleep_range(10000, 12000);
}
/* 10ms delay for the supply to reach the desired voltage level */
usleep_range(10000, 12000);
/*
* Continuing on failing to enable regulator would lead to a panic
* anyway, since the commands would fail and console would be flooded
* with prints, eventually leading to a watchdog bark
*/
rc = msmsdcc_setup_vreg(host, true, false);
if (rc) {
pr_err("%s: %s enable regulator: failed: %d\n",
mmc_hostname(mmc), __func__, rc);
BUG_ON(rc);
}
/* 10ms delay for the supply to reach the desired voltage level */
usleep_range(10000, 12000);
}
static const struct mmc_host_ops msmsdcc_ops = {