mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-25 16:31:13 +00:00
72 lines
2.3 KiB
Diff
72 lines
2.3 KiB
Diff
From 91769986a724f63db52f3c78c79ac84a5b7045bf Mon Sep 17 00:00:00 2001
|
|
From: Daniel Willmann <daniel@totalueberwachung.de>
|
|
Date: Sat, 19 Apr 2014 23:59:18 +0200
|
|
Subject: [PATCH] mmc: mxs: fix card detection function for broken card detect
|
|
|
|
Return -ENOSYS in get_cd if broken-cd is specified in the device tree.
|
|
|
|
Commit a91fe279ae75 (mmc: mxs: use standard flag for broken card
|
|
detection) sets MMC_CAP_NEEDS_POLL when broken-cd is specified. This
|
|
driver sets this flag unconditionally as it does not support a card
|
|
detect interrupt. Instead, broken-cd means that there is no card detect
|
|
signal connected.
|
|
|
|
The mmc core checks the get_cd function return value to determine if a
|
|
card is present. Only for a non-zero return value it will attempt to
|
|
initialize the card. So retuning -ENOSYS will allow the card to be
|
|
initialized.
|
|
|
|
For comparison, mmc_gpio_get_cd in slot-gpio.c also returns -ENOSYS if
|
|
the card detect GPIO is not valid.
|
|
|
|
Signed-off-by: Daniel Willmann <daniel@totalueberwachung.de>
|
|
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
|
|
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
|
|
Signed-off-by: Chris Ball <chris@printf.net>
|
|
---
|
|
drivers/mmc/host/mxs-mmc.c | 7 +++++++
|
|
1 file changed, 7 insertions(+)
|
|
|
|
diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
|
|
index 073e871..babfea0 100644
|
|
--- a/drivers/mmc/host/mxs-mmc.c
|
|
+++ b/drivers/mmc/host/mxs-mmc.c
|
|
@@ -70,6 +70,7 @@ struct mxs_mmc_host {
|
|
unsigned char bus_width;
|
|
spinlock_t lock;
|
|
int sdio_irq_en;
|
|
+ bool broken_cd;
|
|
};
|
|
|
|
static int mxs_mmc_get_cd(struct mmc_host *mmc)
|
|
@@ -78,6 +79,9 @@ static int mxs_mmc_get_cd(struct mmc_host *mmc)
|
|
struct mxs_ssp *ssp = &host->ssp;
|
|
int present, ret;
|
|
|
|
+ if (host->broken_cd)
|
|
+ return -ENOSYS;
|
|
+
|
|
ret = mmc_gpio_get_cd(mmc);
|
|
if (ret >= 0)
|
|
return ret;
|
|
@@ -568,6 +572,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
|
|
{
|
|
const struct of_device_id *of_id =
|
|
of_match_device(mxs_mmc_dt_ids, &pdev->dev);
|
|
+ struct device_node *np = pdev->dev.of_node;
|
|
struct mxs_mmc_host *host;
|
|
struct mmc_host *mmc;
|
|
struct resource *iores;
|
|
@@ -634,6 +639,8 @@ static int mxs_mmc_probe(struct platform_device *pdev)
|
|
mmc->caps = MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED |
|
|
MMC_CAP_SDIO_IRQ | MMC_CAP_NEEDS_POLL;
|
|
|
|
+ host->broken_cd = of_property_read_bool(np, "broken-cd");
|
|
+
|
|
mmc->f_min = 400000;
|
|
mmc->f_max = 288000000;
|
|
|
|
--
|
|
2.0.3
|
|
|