diff options
| author | Ulf Hansson <ulf.hansson@linaro.org> | 2013-01-09 17:19:54 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-01-23 10:17:00 +0000 |
| commit | f4670daef5e81aa312f5a18f571dbd8169ce079e (patch) | |
| tree | c4e2bb8d20c215851312ff7955154e32af7a0f48 | |
| parent | 8259293aee1d44d7ebf0c644ef48db835653ebc3 (diff) | |
| download | op-kernel-dev-f4670daef5e81aa312f5a18f571dbd8169ce079e.zip op-kernel-dev-f4670daef5e81aa312f5a18f571dbd8169ce079e.tar.gz | |
ARM: 7623/1: mmc: mmci: Fixup clock gating when freq is 0 for ST-variants
In the ST Micro variant, the MMCICLOCK register must not be used to
gate the clock. Instead use MMCIPOWER register and by clearing the
PWR_ON bit to do this.
Signed-off-by: Johan Rudholm <johan.rudholm@stericsson.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | drivers/mmc/host/mmci.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index b43e1ab..04efcdf 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -60,6 +60,7 @@ static unsigned int fmax = 515633; * @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register * @pwrreg_powerup: power up value for MMCIPOWER register * @signal_direction: input/out direction of bus signals can be indicated + * @pwrreg_clkgate: MMCIPOWER register must be used to gate the clock */ struct variant_data { unsigned int clkreg; @@ -72,6 +73,7 @@ struct variant_data { bool blksz_datactrl16; u32 pwrreg_powerup; bool signal_direction; + bool pwrreg_clkgate; }; static struct variant_data variant_arm = { @@ -96,6 +98,7 @@ static struct variant_data variant_u300 = { .sdio = true, .pwrreg_powerup = MCI_PWR_ON, .signal_direction = true, + .pwrreg_clkgate = true, }; static struct variant_data variant_nomadik = { @@ -107,6 +110,7 @@ static struct variant_data variant_nomadik = { .st_clkdiv = true, .pwrreg_powerup = MCI_PWR_ON, .signal_direction = true, + .pwrreg_clkgate = true, }; static struct variant_data variant_ux500 = { @@ -119,6 +123,7 @@ static struct variant_data variant_ux500 = { .st_clkdiv = true, .pwrreg_powerup = MCI_PWR_ON, .signal_direction = true, + .pwrreg_clkgate = true, }; static struct variant_data variant_ux500v2 = { @@ -132,6 +137,7 @@ static struct variant_data variant_ux500v2 = { .blksz_datactrl16 = true, .pwrreg_powerup = MCI_PWR_ON, .signal_direction = true, + .pwrreg_clkgate = true, }; /* @@ -1150,6 +1156,13 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) } } + /* + * If clock = 0 and the variant requires the MMCIPOWER to be used for + * gating the clock, the MCI_PWR_ON bit is cleared. + */ + if (!ios->clock && variant->pwrreg_clkgate) + pwr &= ~MCI_PWR_ON; + spin_lock_irqsave(&host->lock, flags); mmci_set_clkreg(host, ios->clock); |
