[PATCH resend] mmc: mtk-sd: don't ignore max-frequency from device tree

[Daniel Golle]

commit e58e68d9 ("mmc: mtk-sd: assign plat->cfg.f_max with a correct value")
wrongly assumed that plat->cfg.f_max is always unset at the time
mscd_drv_probe() is run. This is not true in case max-frequency being
defined in device tree, as it is then already set by mmc_of_parse()
in msdc_of_to_plat().
Only set plat->cfg.f_max to the default maximum value in case it is
not already set to a sane value.

Fixes: e58e68d93e ("mmc: mtk-sd: assign plat->cfg.f_max with a correct value")
Cc: Stefan Roese <sr at denx.de>
Cc: Weijie Gao <weijie.gao at mediatek.com>
Signed-off-by: Daniel Golle <daniel at makrotopia.org>
---
 drivers/mmc/mtk-sd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/mtk-sd.c b/drivers/mmc/mtk-sd.c
index 3b9c12266a..48a764be82 100644
--- a/drivers/mmc/mtk-sd.c
+++ b/drivers/mmc/mtk-sd.c
@@ -1639,7 +1639,8 @@ static int msdc_drv_probe(struct udevice *dev)
 	else
 		cfg->f_min = host->src_clk_freq / (4 * 4095);
 
-	cfg->f_max = host->src_clk_freq;
+	if (cfg->f_max < cfg->f_min || cfg->f_max > host->src_clk_freq)
+		cfg->f_max = host->src_clk_freq;
 
 	cfg->b_max = 1024;
 	cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
-- 
2.30.2

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