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authorUlf Hansson <ulf.hansson@linaro.org>2018-04-05 22:24:15 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2018-05-08 10:33:50 +0300
commit508c9864ccede5dd4b8a7220b3fe6998763e4407 (patch)
treefbf0c81decabc0fcac4ac627ce2c2d96ec837a58 /drivers/mmc
parent1433269c4d2461be1f36db5dbb453976b38996ff (diff)
downloadlinux-508c9864ccede5dd4b8a7220b3fe6998763e4407.tar.xz
mmc: core: Share internal function to set initial signal voltage
Move the corresponding code for setting the initial signal voltage, from mmc_power_up() into a new function, mmc_set_initial_signal_voltage(). Make the function internally available to the mmc core, as to allow the following changes to make use of it. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Quentin Schulz <quentin.schulz@bootlin.com> Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/core/core.c19
-rw-r--r--drivers/mmc/core/core.h1
2 files changed, 13 insertions, 7 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 7a79dc1599e5..2c1a220531c4 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1484,6 +1484,17 @@ 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))
+ dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n");
+ else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180))
+ dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n");
+ else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120))
+ dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n");
+}
+
int mmc_host_set_uhs_voltage(struct mmc_host *host)
{
u32 clock;
@@ -1646,13 +1657,7 @@ void mmc_power_up(struct mmc_host *host, u32 ocr)
/* Set initial state and call mmc_set_ios */
mmc_set_initial_state(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))
- dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n");
- else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180))
- dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n");
- else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120))
- dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n");
+ mmc_set_initial_signal_voltage(host);
/*
* This delay should be sufficient to allow the power supply
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index a141ec0e1ccc..9d8f09ac0821 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -52,6 +52,7 @@ u32 mmc_select_voltage(struct mmc_host *host, u32 ocr);
int mmc_set_uhs_voltage(struct mmc_host *host, u32 ocr);
int mmc_host_set_uhs_voltage(struct mmc_host *host);
int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage);
+void mmc_set_initial_signal_voltage(struct mmc_host *host);
void mmc_set_timing(struct mmc_host *host, unsigned int timing);
void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type);
int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr,