mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-30 14:19:16 +00:00
mmc: sdhci-of-at91: wait for calibration done before proceed
commitaf467fad78
upstream. Datasheet specifies that at the end of calibration the SDMMC_CALCR_EN bit will be cleared. No commands should be send before calibration is done. Fixes:dbdea70f71
("mmc: sdhci-of-at91: fix CALCR register being rewritten") Fixes:727d836a37
("mmc: sdhci-of-at91: add DT property to enable calibration on full reset") Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20210924082851.2132068-2-claudiu.beznea@microchip.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
e5cb3680b9
commit
3a0feae5f6
1 changed files with 6 additions and 0 deletions
|
@ -11,6 +11,7 @@
|
|||
#include <linux/delay.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/iopoll.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/mmc/host.h>
|
||||
#include <linux/mmc/slot-gpio.h>
|
||||
|
@ -114,6 +115,7 @@ static void sdhci_at91_reset(struct sdhci_host *host, u8 mask)
|
|||
{
|
||||
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
||||
struct sdhci_at91_priv *priv = sdhci_pltfm_priv(pltfm_host);
|
||||
unsigned int tmp;
|
||||
|
||||
sdhci_reset(host, mask);
|
||||
|
||||
|
@ -126,6 +128,10 @@ static void sdhci_at91_reset(struct sdhci_host *host, u8 mask)
|
|||
|
||||
sdhci_writel(host, calcr | SDMMC_CALCR_ALWYSON | SDMMC_CALCR_EN,
|
||||
SDMMC_CALCR);
|
||||
|
||||
if (read_poll_timeout(sdhci_readl, tmp, !(tmp & SDMMC_CALCR_EN),
|
||||
10, 20000, false, host, SDMMC_CALCR))
|
||||
dev_err(mmc_dev(host->mmc), "Failed to calibrate\n");
|
||||
}
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in a new issue