Re: [PATCH v2 2/3] mtd: spi-nor: support vcc-supply regulator

[Marc Kleine-Budde <mkl@pengutronix.de>]

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On 30.09.2024 11:21:27, Marc Kleine-Budde wrote:
> On 30.09.2024 17:22:25, Peng Fan (OSS) wrote:
> > From: Peng Fan <peng.fan@nxp.com>
> > 
> > SPI NOR flashes needs power supply to work properly. The power supply
> > maybe software controllable per board design. So add the support
> > for an vcc-supply regulator.
> > 
> > Signed-off-by: Peng Fan <peng.fan@nxp.com>
> > ---
> >  drivers/mtd/spi-nor/core.c | 5 +++++
> >  1 file changed, 5 insertions(+)
> > 
> > diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
> > index 9d6e85bf227b..5249c8b13916 100644
> > --- a/drivers/mtd/spi-nor/core.c
> > +++ b/drivers/mtd/spi-nor/core.c
> > @@ -17,6 +17,7 @@
> >  #include <linux/mtd/spi-nor.h>
> >  #include <linux/mutex.h>
> >  #include <linux/of_platform.h>
> > +#include <linux/regulator/consumer.h>
> >  #include <linux/sched/task_stack.h>
> >  #include <linux/sizes.h>
> >  #include <linux/slab.h>
> > @@ -3462,6 +3463,10 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
> >  	if (!nor->bouncebuf)
> >  		return -ENOMEM;
> >  
> > +	ret = devm_regulator_get_enable(dev, "vcc");
> > +	if (ret)
> > +		return ret;
> > +
> 
> What happens if the SPI-NOR doesn't have a "vcc" regulator?

...the SPI-NOR will use the dummy regulator.

regards,
Marc

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