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mmc: sdhci-of-arasan: refactor set_clock callback

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commit 61b914eb81 ("mmc: sdhci-of-arasan: add phy support for
sdhci-of-arasan") introduce phy support for arasan. According to
the vendor's databook, we should make sure the phy is in poweroff
stat before we configure the clk stuff. Otherwise it may cause
some IO sample timing issue from the test. But we don't need this
extra operation while running in non HS200/HS400 mode since phy
doesn't trigger sampling block.

Change-Id: I5506f99e5a3b4d9a4356ad485ceac900c6d754aa
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
This commit is contained in:
Shawn Lin
2016-04-25 10:08:27 +08:00
committed by Huang, Tao
parent 9faaf821a7
commit 68eac41717
1 changed files with 19 additions and 1 deletions
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20
drivers/mmc/host/sdhci-of-arasan.c
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@@ -55,8 +55,26 @@ static unsigned int sdhci_arasan_get_timeout_clock(struct sdhci_host *host)
return freq;
}
static void sdhci_arasan_set_clock(struct sdhci_host *host, unsigned int clock)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_arasan_data *sdhci_arasan = pltfm_host->priv;
bool ctrl_phy = false;
if (clock > MMC_HIGH_52_MAX_DTR && (!IS_ERR(sdhci_arasan->phy)))
ctrl_phy = true;
if (ctrl_phy)
phy_power_off(sdhci_arasan->phy);
sdhci_set_clock(host, clock);
if (ctrl_phy)
phy_power_on(sdhci_arasan->phy);
}
static struct sdhci_ops sdhci_arasan_ops = {
.set_clock = sdhci_set_clock,
.set_clock = sdhci_arasan_set_clock,
.get_max_clock = sdhci_pltfm_clk_get_max_clock,
.get_timeout_clock = sdhci_arasan_get_timeout_clock,
.set_bus_width = sdhci_set_bus_width,