From 4687c8c75b6ae4fb71c3821d116bcbc9379886ec Mon Sep 17 00:00:00 2001 From: Andy Green Date: Wed, 19 Nov 2008 17:09:58 +0000 Subject: fix-glamo-mci-ensure-more-than-74-clocks-after-power.patch We are meant to run SD_CLK a little while after power-on for the SD Card, but with the no idle clock changes we didn't take care about it. This makes us sleep a little bit before disabling clock if we just powered up the SD Card. Signed-off-by: Andy Green --- drivers/mfd/glamo/glamo-mci.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/mfd/glamo/glamo-mci.c') diff --git a/drivers/mfd/glamo/glamo-mci.c b/drivers/mfd/glamo/glamo-mci.c index 505be5f89b6..0d829557439 100644 --- a/drivers/mfd/glamo/glamo-mci.c +++ b/drivers/mfd/glamo/glamo-mci.c @@ -684,6 +684,7 @@ static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) struct glamo_mci_host *host = mmc_priv(mmc); int n = 0; int div; + int powering = 0; /* Set power */ switch(ios->power_mode) { @@ -699,6 +700,7 @@ static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) glamo_engine_enable(glamo_mci_def_pdata.pglamo, GLAMO_ENGINE_MMC); glamo_mci_reset(host); + powering = 1; break; case MMC_POWER_OFF: @@ -716,6 +718,12 @@ static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) host->real_rate = __glamo_mci_set_card_clock(host, ios->clock, &div); host->clk_div = div; + /* after power-up, we are meant to give it >= 74 clocks so it can + * initialize itself. Doubt any modern cards need it but anyway... + */ + if (powering) + msleep(1); + if (!sd_idleclk) /* stop the clock to card, because we are idle until transfer */ __glamo_mci_fix_card_div(host, -1); -- cgit v1.2.3