On Wed, Jan 5, 2011 at 12:09 AM, David Vrabel <david.vrabel@xxxxxxx> wrote:
> How are you intending to use this?
diff --git a/arch/arm/mach-omap2/board-zoom-peripherals.c
b/arch/arm/mach-omap2/board-zoom-peripherals.c
index 9db9203..ae69ba9 100644
--- a/arch/arm/mach-omap2/board-zoom-peripherals.c
+++ b/arch/arm/mach-omap2/board-zoom-peripherals.c
@@ -19,6 +19,7 @@
#include <linux/regulator/fixed.h>
#include <linux/wl12xx.h>
#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@@ -196,6 +197,18 @@ struct wl12xx_platform_data omap_zoom_wlan_data
__initdata = {
.board_ref_clock = 1,
};
+static void zoom_wl1271_init_card(struct mmc_card *card)
+{
+ /*
+ * Tell SDIO core to disconnect the pull-up resistor on CD/DAT[3]
+ * (pin 1) of the wl1271 card, which is not required since we
+ * already have OMAP pulling up this line, and we don't need any
+ * card detection functionality. As a result, this may save some
+ * power.
+ */
+ card->quirks |= MMC_QUIRK_DISABLE_CD;
+}
+
static struct omap2_hsmmc_info mmc[] __initdata = {
{
.name = "external",
@@ -220,6 +233,7 @@ static struct omap2_hsmmc_info mmc[] __initdata = {
.gpio_wp = -EINVAL,
.gpio_cd = -EINVAL,
.nonremovable = true,
+ .init_card = zoom_wl1271_init_card,
},
{} /* Terminator */
};
> Whether this pull up should be
> enabled or disabled is determined by the board (not the card). The
> pull-up should be disabled if the board has a pull-up external to the
> card, otherwise it must remain enabled.
Agree.
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