[Linux-stm32] [PATCH 1/3] mmc: Prepare all code for mmc_set_signal_voltage() returning > 0
Marek Vasut
marex at denx.de
Wed Apr 1 19:57:20 UTC 2020
Patch all drivers and core code which uses mmc_set_signal_voltage()
and prepare it for the fact that mmc_set_signal_voltage() can return
a value > 0, which would happen if the signal voltage switch did NOT
happen, because the voltage was already set correctly.
Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Alexandre Torgue <alexandre.torgue at st.com>
Cc: Linus Walleij <linus.walleij at linaro.org>
Cc: Ludovic Barre <ludovic.barre at st.com>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org>
Cc: Maxime Coquelin <mcoquelin.stm32 at gmail.com>
Cc: Patrice Chotard <patrice.chotard at st.com>
Cc: Patrick Delaunay <patrick.delaunay at st.com>
Cc: Russell King <linux at armlinux.org.uk>
Cc: Ulf Hansson <ulf.hansson at linaro.org>
Cc: linux-stm32 at st-md-mailman.stormreply.com
To: linux-mmc at vger.kernel.org
---
drivers/mmc/core/core.c | 10 +++++-----
drivers/mmc/core/mmc.c | 16 ++++++++--------
drivers/mmc/host/dw_mmc-k3.c | 2 +-
drivers/mmc/host/dw_mmc.c | 3 +--
drivers/mmc/host/mtk-sd.c | 2 +-
drivers/mmc/host/renesas_sdhi_core.c | 2 +-
drivers/mmc/host/sdhci-sprd.c | 2 +-
drivers/mmc/host/sdhci.c | 6 +++---
8 files changed, 21 insertions(+), 22 deletions(-)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 4c5de6d37ac7..98a3552205cb 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1142,7 +1142,7 @@ int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage)
if (host->ops->start_signal_voltage_switch)
err = host->ops->start_signal_voltage_switch(host, &host->ios);
- if (err)
+ if (err < 0)
host->ios.signal_voltage = old_signal_voltage;
return err;
@@ -1152,11 +1152,11 @@ int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage)
void mmc_set_initial_signal_voltage(struct mmc_host *host)
{
/* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */
- if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330))
+ if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330) >= 0)
dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n");
- else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180))
+ else if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180) >= 0)
dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n");
- else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120))
+ else if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120) >= 0)
dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n");
}
@@ -1172,7 +1172,7 @@ int mmc_host_set_uhs_voltage(struct mmc_host *host)
host->ios.clock = 0;
mmc_set_ios(host);
- if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180))
+ if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180) < 0)
return -EAGAIN;
/* Keep clock gated for at least 10 ms, though spec only says 5 ms */
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index de94fbe629bd..9f5aae051f6d 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1121,7 +1121,7 @@ static int mmc_select_hs_ddr(struct mmc_card *card)
*/
if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
- if (!err)
+ if (err >= 0)
return 0;
}
@@ -1130,7 +1130,7 @@ static int mmc_select_hs_ddr(struct mmc_card *card)
err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
/* make sure vccq is 3.3v after switching disaster */
- if (err)
+ if (err < 0)
err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
return err;
@@ -1339,11 +1339,11 @@ static int mmc_select_hs400es(struct mmc_card *card)
if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
- if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
+ if (err < 0 && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
/* If fails try again during next card power cycle */
- if (err)
+ if (err < 0)
goto out_err;
err = mmc_select_bus_width(card);
@@ -1437,11 +1437,11 @@ static int mmc_select_hs200(struct mmc_card *card)
if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
- if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
+ if (err < 0 && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
/* If fails try again during next card power cycle */
- if (err)
+ if (err < 0)
return err;
mmc_select_driver_type(card);
@@ -1480,7 +1480,7 @@ static int mmc_select_hs200(struct mmc_card *card)
err:
if (err) {
/* fall back to the old signal voltage, if fails report error */
- if (mmc_set_signal_voltage(host, old_signal_voltage))
+ if (mmc_set_signal_voltage(host, old_signal_voltage) < 0)
err = -EIO;
pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
@@ -1769,7 +1769,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
err = mmc_select_bus_width(card);
if (err > 0 && mmc_card_hs(card)) {
err = mmc_select_hs_ddr(card);
- if (err)
+ if (err < 0)
goto free_card;
}
}
diff --git a/drivers/mmc/host/dw_mmc-k3.c b/drivers/mmc/host/dw_mmc-k3.c
index 23b6f65b3785..50977ff18074 100644
--- a/drivers/mmc/host/dw_mmc-k3.c
+++ b/drivers/mmc/host/dw_mmc-k3.c
@@ -424,7 +424,7 @@ static int dw_mci_hi3660_switch_voltage(struct mmc_host *mmc,
if (!IS_ERR(mmc->supply.vqmmc)) {
ret = mmc_regulator_set_vqmmc(mmc, ios);
- if (ret) {
+ if (ret < 0) {
dev_err(host->dev, "Regulator set error %d\n", ret);
return ret;
}
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index bc5278ab5707..5d1f8a3ec3a5 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1546,8 +1546,7 @@ static int dw_mci_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
if (!IS_ERR(mmc->supply.vqmmc)) {
ret = mmc_regulator_set_vqmmc(mmc, ios);
-
- if (ret) {
+ if (ret < 0) {
dev_dbg(&mmc->class_dev,
"Regulator set error %d - %s V\n",
ret, uhs & v18 ? "1.8" : "3.3");
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index b221c02cc71f..dc6710f9f36f 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -1379,7 +1379,7 @@ static int msdc_ops_switch_volt(struct mmc_host *mmc, struct mmc_ios *ios)
}
ret = mmc_regulator_set_vqmmc(mmc, ios);
- if (ret) {
+ if (ret < 0) {
dev_dbg(host->dev, "Regulator set error %d (%d)\n",
ret, ios->signal_voltage);
} else {
diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
index df826661366f..08952b6681f1 100644
--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -237,7 +237,7 @@ static int renesas_sdhi_start_signal_voltage_switch(struct mmc_host *mmc,
MMC_SIGNAL_VOLTAGE_330 ? 0 : -EINVAL;
ret = mmc_regulator_set_vqmmc(host->mmc, ios);
- if (ret)
+ if (ret < 0)
return ret;
return pinctrl_select_state(priv->pinctrl, pin_state);
diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c
index 2ab42c59e4f8..f6c7666e8fa4 100644
--- a/drivers/mmc/host/sdhci-sprd.c
+++ b/drivers/mmc/host/sdhci-sprd.c
@@ -434,7 +434,7 @@ static int sdhci_sprd_voltage_switch(struct mmc_host *mmc, struct mmc_ios *ios)
if (!IS_ERR(mmc->supply.vqmmc)) {
ret = mmc_regulator_set_vqmmc(mmc, ios);
- if (ret) {
+ if (ret < 0) {
pr_err("%s: Switching signalling voltage failed\n",
mmc_hostname(mmc));
return ret;
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 3f716466fcfd..5f9d4c8d24f8 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2411,7 +2411,7 @@ int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
if (!IS_ERR(mmc->supply.vqmmc)) {
ret = mmc_regulator_set_vqmmc(mmc, ios);
- if (ret) {
+ if (ret < 0) {
pr_warn("%s: Switching to 3.3V signalling voltage failed\n",
mmc_hostname(mmc));
return -EIO;
@@ -2434,7 +2434,7 @@ int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
return -EINVAL;
if (!IS_ERR(mmc->supply.vqmmc)) {
ret = mmc_regulator_set_vqmmc(mmc, ios);
- if (ret) {
+ if (ret < 0) {
pr_warn("%s: Switching to 1.8V signalling voltage failed\n",
mmc_hostname(mmc));
return -EIO;
@@ -2466,7 +2466,7 @@ int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
return -EINVAL;
if (!IS_ERR(mmc->supply.vqmmc)) {
ret = mmc_regulator_set_vqmmc(mmc, ios);
- if (ret) {
+ if (ret < 0) {
pr_warn("%s: Switching to 1.2V signalling voltage failed\n",
mmc_hostname(mmc));
return -EIO;
--
2.25.1
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