On Monday 30 July 2012 11:54 AM, NeilBrown wrote:
On Mon, 30 Jul 2012 10:50:36 +0530 Rajendra Nayak<rnayak@xxxxxx> wrote:
On Monday 30 July 2012 05:42 AM, NeilBrown wrote:
1/ if regulator_get fails, return an error. This is important
if it failed with EPROBE_DEFER, as the probe needs to be
deferred.
2/ Don't set .set_power until the regulator has been found, or
the deferred probe will not bother calling omap_hsmmc_reg_get().
I am not very sure, but aren't the data structures re-allocated on a
re-probe (after it was deferred) causing .set_power to be lost anyway?
Apparently not - as I needed to make that change before the re-probe would
work.
Looking at the code to remind myself:
#define mmc_slot(host) (host->pdata->slots[host->slot_id])
so the slot is inside the platform data which is allocated in
omap_hsmmc_init_one, called from omap_hsmmc_init.
This is all prior to the probing of the device.
So no: once set_power is set, it stays set.
Thanks for the explanation, makes sense.
Acked-by: Rajendra Nayak <rnayak@xxxxxx>
Btw, is the support for re-probe/deferred probe already merged
now? or are you testing this with some out of tree patches.
Thanks,
NeilBrown
Signed-off-by: NeilBrown<neilb@xxxxxxx>
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 389a3ee..f052c29 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -299,12 +299,12 @@ static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
struct regulator *reg;
int ocr_value = 0;
- mmc_slot(host).set_power = omap_hsmmc_set_power;
-
reg = regulator_get(host->dev, "vmmc");
if (IS_ERR(reg)) {
dev_dbg(host->dev, "vmmc regulator missing\n");
+ return PTR_ERR(reg);
} else {
+ mmc_slot(host).set_power = omap_hsmmc_set_power;
host->vcc = reg;
ocr_value = mmc_regulator_get_ocrmask(reg);
if (!mmc_slot(host).ocr_mask) {
--
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