Hi,
On Fri, 23 Feb 2018 15:54:23 +0100
Maxime Ripard <maxime.ripard@xxxxxxxxxxx> wrote:
> Hi,
>
> On Fri, Feb 23, 2018 at 02:37:33PM +0100, Mylène Josserand wrote:
> > To prepare the support for sun8i-a83t, create a new function
> > that handles all the resources needed on sun9i-a80 (because
> > it will be different from sun8i-a83t).
> >
> > All the parsing of device tree is moved into this new function:
> > sun9i_dt_parsing. Create also a function to release the resources
> > retrieved during the dt parsing in case there is an error in init
> > function.
> >
> > Signed-off-by: Mylène Josserand <mylene.josserand@xxxxxxxxxxx>
> > ---
> > arch/arm/mach-sunxi/mc_smp.c | 99 ++++++++++++++++++++++++++------------------
> > 1 file changed, 58 insertions(+), 41 deletions(-)
> >
> > diff --git a/arch/arm/mach-sunxi/mc_smp.c b/arch/arm/mach-sunxi/mc_smp.c
> > index 11e46c6efb90..650a2ad4398f 100644
> > --- a/arch/arm/mach-sunxi/mc_smp.c
> > +++ b/arch/arm/mach-sunxi/mc_smp.c
> > @@ -684,35 +684,22 @@ static int __init sunxi_mc_smp_lookback(void)
> > return ret;
> > }
> >
> > -static int __init sunxi_mc_smp_init(void)
> > +static int sun9i_dt_parsing(struct resource res)
>
> Like I told you in the previous version, this should be _parse_dt, and
> not _dt_parsing.
Sorry, I forgot this review.
>
> Also, I'm not sure why you are passing by copy the resource structure?
>
> > {
> > - struct device_node *cpucfg_node, *sram_node, *node;
> > - struct resource res;
> > + struct device_node *prcm_node, *cpucfg_node, *sram_node;
> > int ret;
> >
> > - if (!of_machine_is_compatible("allwinner,sun9i-a80"))
> > - return -ENODEV;
> > -
> > - if (!sunxi_mc_smp_cpu_table_init())
> > - return -EINVAL;
> > -
> > - if (!cci_probed()) {
> > - pr_err("%s: CCI-400 not available\n", __func__);
> > - return -ENODEV;
> > - }
> > -
> > - node = of_find_compatible_node(NULL, NULL, "allwinner,sun9i-a80-prcm");
> > - if (!node) {
> > - pr_err("%s: PRCM not available\n", __func__);
> > + prcm_node = of_find_compatible_node(NULL, NULL,
> > + "allwinner,sun9i-a80-prcm");
> > + if (!prcm_node)
> > return -ENODEV;
> > - }
> >
> > /*
> > * Unfortunately we can not request the I/O region for the PRCM.
> > * It is shared with the PRCM clock.
> > */
> > - prcm_base = of_iomap(node, 0);
> > - of_node_put(node);
> > + prcm_base = of_iomap(prcm_node, 0);
>
> So it does more a bit more than just parsing the DT?
>
> Can you maybe just fill the DT nodes and have the common part map the
> memory regions if the pointer is not NULL?
Yep, I will rework this function to only parse device tree nodes.
Thanks,
Mylène
--
Mylène Josserand, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
http://bootlin.com
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