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53 lines
1.7 KiB
Diff
53 lines
1.7 KiB
Diff
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From 2e9349e8be6002955cb0ab6a6ed536f5f8041cba Mon Sep 17 00:00:00 2001
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From: Andy Green <andy@openmoko.com>
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Date: Fri, 25 Jul 2008 23:06:21 +0100
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Subject: [PATCH] fix-glamo-mci-ensure-more-than-74-clocks-after-power.patch
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We are meant to run SD_CLK a little while after power-on for the SD
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Card, but with the no idle clock changes we didn't take care about it.
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This makes us sleep a little bit before disabling clock if we just
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powered up the SD Card.
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Signed-off-by: Andy Green <andy@openmoko.com>
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---
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drivers/mfd/glamo/glamo-mci.c | 8 ++++++++
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1 files changed, 8 insertions(+), 0 deletions(-)
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diff --git a/drivers/mfd/glamo/glamo-mci.c b/drivers/mfd/glamo/glamo-mci.c
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index 505be5f..0d82955 100644
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--- a/drivers/mfd/glamo/glamo-mci.c
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+++ b/drivers/mfd/glamo/glamo-mci.c
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@@ -684,6 +684,7 @@ static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
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struct glamo_mci_host *host = mmc_priv(mmc);
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int n = 0;
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int div;
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+ int powering = 0;
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/* Set power */
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switch(ios->power_mode) {
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@@ -699,6 +700,7 @@ static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
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glamo_engine_enable(glamo_mci_def_pdata.pglamo,
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GLAMO_ENGINE_MMC);
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glamo_mci_reset(host);
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+ powering = 1;
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break;
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case MMC_POWER_OFF:
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@@ -716,6 +718,12 @@ static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
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host->real_rate = __glamo_mci_set_card_clock(host, ios->clock, &div);
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host->clk_div = div;
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+ /* after power-up, we are meant to give it >= 74 clocks so it can
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+ * initialize itself. Doubt any modern cards need it but anyway...
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+ */
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+ if (powering)
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+ msleep(1);
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+
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if (!sd_idleclk)
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/* stop the clock to card, because we are idle until transfer */
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__glamo_mci_fix_card_div(host, -1);
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--
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1.5.6.3
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