Re: [PATCH v3 2/4] mtd: rawnand: Add Macronix MX25F0A NAND controller

masonccyang
2019-05-23T08:58:13Z

Hi Miquel,

> >
> > > > +
> > > > +static void mxic_nand_select_chip(struct nand_chip *chip, int
chipnr)
> > >
> > > _select_target() is preferred now
> >
> > Do you mean I implement mxic_nand_select_target() to control #CS ?
> >
> > If so, I need to call mxic_nand_select_target( ) to control #CS ON
> > and then #CS OFF in _exec_op() due to nand_select_target()<in
nand_base,c>
> > is still calling chip->legacy.select_chip ?
>
> You must forget about the ->select_chip() callback. Now it should be
> handled directly from the controller driver. Please have a look at the
> commit pointed against the marvell_nand.c driver.

I have no Marvell NFC datasheet and have one question.

In marvell_nand.c, there is no xxx_deselect_target() or
something like that doing #CS OFF.
marvell_nfc_select_target() seems always to make one of chip or die
#CS keep low.

Is it right ?

How to make all #CS keep high for NAND to enter
low-power standby mode if driver don't use "legacy.select_chip()" ?

thanks & best regards,
Mason

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