Messages in this thread |  | | Date | Thu, 17 Oct 2013 10:59:20 +0200 | From | Alexandre Belloni <> | Subject | Re: [PATCHv2] mmc: atmel-mci: add vmmc-supply support |
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On 17/10/2013 10:34, Ulf Hansson wrote: > On 17 October 2013 00:19, Alexandre Belloni > <alexandre.belloni@free-electrons.com> wrote: >> Other MMC hosts handle a regulator named vmmc-supply that allows to power the >> MMC card or SDIO device before communicating on the bus. >> >> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> >> --- >> >> Changes in v2: >> - use mmc_regulator_get_supply instead of devm_regulator_get >> >> drivers/mmc/host/atmel-mci.c | 9 +++++++++ >> 1 file changed, 9 insertions(+) >> >> diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c >> index 69e438e..4ea5333 100644 >> --- a/drivers/mmc/host/atmel-mci.c >> +++ b/drivers/mmc/host/atmel-mci.c >> @@ -23,6 +23,7 @@ >> #include <linux/of_device.h> >> #include <linux/of_gpio.h> >> #include <linux/platform_device.h> >> +#include <linux/regulator/consumer.h> >> #include <linux/scatterlist.h> >> #include <linux/seq_file.h> >> #include <linux/slab.h> >> @@ -2198,6 +2199,14 @@ static int __init atmci_init_slot(struct atmel_mci *host, >> host->slot[id] = slot; >> mmc_add_host(mmc); >> >> + mmc_regulator_get_supply(mmc); >> + if (!IS_ERR(mmc->supply.vmmc)) { >> + int ret = regulator_enable(mmc->supply.vmmc); > You should not enable the regulator here, instead handle that from the > .set_ios function. This complete code chunk must also be moved prior > to mmc_add_host above.
Right, I was wondering about that. I actually had a version where it was before mmc_add_host > > When enabling/disabling the regulator from the .set_ios, I suppose you > want to use mmc_regulator_set_ocr API instead.
Oh right, I pretty new to the mmc subsystem and I was probably to tired to find that one yesterday. I actually looked for regulator_enable in mmc/core/core.c and didn't see it ...
Thank you for your prompt reviews.
-- Alexandre Belloni, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com
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