Commit 399bc486 authored by Linus Walleij's avatar Linus Walleij Committed by Russell King

ARM: 6858/1: mmci: force negative edge on clock bypass for ux500

This fixes a regression on high clock speeds with the MMCI on
ux500. We need to make sure we derive the passthru clock on the
falling edge of the incoming clock if it shall work at high
frequencies, and on the ux500's there is a special bit for this.
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 49ac215e
...@@ -103,6 +103,8 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired) ...@@ -103,6 +103,8 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
if (desired) { if (desired) {
if (desired >= host->mclk) { if (desired >= host->mclk) {
clk = MCI_CLK_BYPASS; clk = MCI_CLK_BYPASS;
if (variant->st_clkdiv)
clk |= MCI_ST_UX500_NEG_EDGE;
host->cclk = host->mclk; host->cclk = host->mclk;
} else if (variant->st_clkdiv) { } else if (variant->st_clkdiv) {
/* /*
......
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