[PATCH v3 4/4] mci: bcm2835: set timeout value to 100ms

[Sebastien Bourdelin <sebastien.bourdelin@gmail.com>]

As mentionned in the Raspberry Pi4 bootrom Changelog [1]:
"Increase timeout of early SD/EMMC commands to 100ms".
The BCM2711 SDHCI can take up to 100ms to complete a command.

Without this change, we had noticed that Barebox sometime stay stucked
on a timeout error while trying to boot Linux from the eMMC.

[1] https://github.com/raspberrypi/rpi-eeprom/blob/master/firmware-2711/release-notes.md#2022-03-10---promote-the-2022-03-10-beta-release-to-lateststable

Signed-off-by: Sebastien Bourdelin <sebastien.bourdelin@rtone.fr>

---
Changes v2 -> v3:
  - Fix email author and signed-off

Changes v1 -> v2:
  - cmd can't be null, remove the check (suggested by Sascha Hauer)
---
 drivers/mci/mci-bcm2835.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mci/mci-bcm2835.c b/drivers/mci/mci-bcm2835.c
index cbf99ee7ca..ff4c6d803c 100644
--- a/drivers/mci/mci-bcm2835.c
+++ b/drivers/mci/mci-bcm2835.c
@@ -128,6 +128,9 @@ static int bcm2835_mci_request(struct mci_host *mci, struct mci_cmd *cmd,
 		block_data |= data->blocksize;
 	}
 
+	/* BCM2xxx SDHCI might take up to 100ms to complete a command */
+	cmd->busy_timeout = 100;
+
 	ret = sdhci_wait_idle_data(&host->sdhci, cmd);
 	if (ret)
 		return ret;
-- 
2.47.0