Re: [PATCH 2/3] ARM: zii-imx8mq-dev: add DT fixups

[Lucas Stach <l.stach@pengutronix.de>]

On Mi, 2019-12-18 at 05:54 -0800, Andrey Smirnov wrote:
> On Tue, Dec 17, 2019 at 3:19 AM Lucas Stach <l.stach@pengutronix.de> wrote:
> > There are only two fixups we need to apply at the moment:
> > - The 27" RMB3 based unit has a eGalax Touchscreen instead of Synaptics.
> > - The 10.1" SCU/CCU unit has no DEB and thus no switch, but instead the
> >   i210 ethernet is routed to the external connector directly.
> > 
> > Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> > ---
> >  arch/arm/boards/zii-imx8mq-dev/board.c | 138 +++++++++++++++++++++++++
> >  arch/arm/dts/imx8mq-zii-ultra.dtsi     |  10 ++
> >  2 files changed, 148 insertions(+)
> > 
> > diff --git a/arch/arm/boards/zii-imx8mq-dev/board.c b/arch/arm/boards/zii-imx8mq-dev/board.c
> > index dcf945db495a..0be68423d9bf 100644
> > --- a/arch/arm/boards/zii-imx8mq-dev/board.c
> > +++ b/arch/arm/boards/zii-imx8mq-dev/board.c
> > @@ -11,6 +11,15 @@
> >  #include <asm/memory.h>
> >  #include <linux/sizes.h>
> >  #include <mach/bbu.h>
> > +#include "../zii-common/pn-fixup.h"
> > +
> > +#define LRU_FLAG_EGALAX                BIT(0)
> > +#define LRU_FLAG_NO_DEB                BIT(1)
> > +
> > +struct zii_imx8mq_dev_lru_fixup {
> > +       struct zii_pn_fixup fixup;
> > +       unsigned int flags;
> > +};
> > 
> >  static int zii_imx8mq_dev_init(void)
> >  {
> > @@ -32,3 +41,132 @@ static int zii_imx8mq_dev_init(void)
> >         return 0;
> >  }
> >  device_initcall(zii_imx8mq_dev_init);
> > +
> > +static int zii_imx8mq_dev_fixup_egalax_ts(struct device_node *root, void *ctx)
> > +{
> > +       struct device_node *np;
> > +
> > +       /*
> > +        * The 27" unit has a EETI eGalax touchscreen instead of the
> > +        * Synaptics RMI4 found on other units.
> > +        */
> > +       pr_info("Enabling eGalax touchscreen instead of RMI4\n");
> > +
> > +       np = of_find_compatible_node(root, NULL, "syna,rmi4-i2c");
> > +       if (!np)
> > +               return -ENODEV;
> > +
> > +       of_device_disable(np);
> > +
> > +       np = of_find_compatible_node(root, NULL, "eeti,exc3000");
> > +       if (!np)
> > +               return -ENODEV;
> > +
> > +       of_device_enable(np);
> > +
> > +       return 0;
> > +}
> > +
> > +static int zii_imx8mq_dev_fixup_deb_internal(void)
> > +{
> > +       struct device_node *np, *aliases;
> > +       struct device_d *dev;
> > +
> > +       /*
> > +        * In the internal DT remove the complete FEC hierarchy and move the
> > +        * i210 to be the eth0 interface to allow network boot to work without
> > +        * rewriting all the boot scripts.
> > +        */
> > +       aliases = of_find_node_by_path("/aliases");
> > +       if (!aliases)
> > +               return -ENODEV;
> > +
> > +       np = of_find_compatible_node(NULL, NULL, "fsl,imx8mq-fec");
> > +       if (!np)
> > +               return -ENODEV;
> > +
> > +       of_device_disable(np);
> > +
> > +       of_property_write_string(aliases, "ethernet1", np->full_name);
> > +
> > +       dev = get_device_by_device_node(np);
> 
> The patch adding this function might be missing from the series. Or
> did I miss it going in earlier?

Urgh, yes. Sorry about that, I missed this one when preparing the stuff
t send out. I'll send it as soon as my Barebox tree isn't messed up
anymore.

Regards,
Lucas

> > +       if (!dev)
> > +               return -ENODEV;
> > +
> > +       unregister_device(dev);
> > +
> > +       np = of_find_node_by_name(NULL, "i210@0");
> > +       if (!np)
> > +               return -ENODEV;
> > +
> > +       of_property_write_string(aliases, "ethernet0", np->full_name);
> > +
> > +       /* Refresh the internal aliases list from the patched DT */
> > +       of_alias_scan();
> > +
> > +       return 0;
> > +}
> > +
> > +static int zii_imx8mq_dev_fixup_deb(struct device_node *root, void *ctx)
> > +{
> > +       struct device_node *np;
> > +
> > +       /*
> > +        * In the kernel DT remove all devices from the DEB, which isn't
> > +        * present on this system.
> > +        */
> > +       np = of_find_compatible_node(root, NULL, "marvell,mv88e6085");
> > +       if (!np)
> > +               return -ENODEV;
> > +
> > +       of_device_disable(np);
> > +
> > +       np = of_find_compatible_node(root, NULL, "zii,rave-wdt");
> > +       if (!np)
> > +               return -ENODEV;
> > +
> > +       of_device_disable(np);
> > +
> > +       return 0;
> > +}
> > +
> > +static void zii_imx8mq_dev_lru_fixup(const struct zii_pn_fixup *context)
> > +{
> > +       const struct zii_imx8mq_dev_lru_fixup *fixup =
> > +               container_of(context, struct zii_imx8mq_dev_lru_fixup, fixup);
> > +
> > +       if (fixup->flags & LRU_FLAG_EGALAX)
> > +               of_register_fixup(zii_imx8mq_dev_fixup_egalax_ts, NULL);
> > +
> > +       if (fixup->flags & LRU_FLAG_NO_DEB) {
> > +               zii_imx8mq_dev_fixup_deb_internal();
> > +               of_register_fixup(zii_imx8mq_dev_fixup_deb, NULL);
> > +       }
> > +}
> > +
> > +#define ZII_IMX8MQ_DEV_LRU_FIXUP(__pn, __flags)                \
> > +       {                                               \
> > +               { __pn, zii_imx8mq_dev_lru_fixup },     \
> > +               __flags                                 \
> > +       }
> > +
> > +static const struct zii_imx8mq_dev_lru_fixup zii_imx8mq_dev_lru_fixups[] = {
> > +       ZII_IMX8MQ_DEV_LRU_FIXUP("00-5131-02", LRU_FLAG_EGALAX),
> > +       ZII_IMX8MQ_DEV_LRU_FIXUP("00-5131-03", LRU_FLAG_EGALAX),
> > +       ZII_IMX8MQ_DEV_LRU_FIXUP("00-5170-01", LRU_FLAG_NO_DEB),
> > +};
> > +
> > +/*
> > + * This initcall needs to be executed before coredevices, so we have a chance
> > + * to fix up the devices with the correct information.
> > + */
> > +static int zii_imx8mq_dev_process_fixups(void)
> > +{
> > +       if (!of_machine_is_compatible("zii,imx8mq-ultra"))
> > +               return 0;
> > +
> > +       zii_process_lru_fixups(zii_imx8mq_dev_lru_fixups);
> > +
> > +       return 0;
> > +}
> > +postmmu_initcall(zii_imx8mq_dev_process_fixups);
> > diff --git a/arch/arm/dts/imx8mq-zii-ultra.dtsi b/arch/arm/dts/imx8mq-zii-ultra.dtsi
> > index 6180f21ab0a4..50bad9b1a27e 100644
> > --- a/arch/arm/dts/imx8mq-zii-ultra.dtsi
> > +++ b/arch/arm/dts/imx8mq-zii-ultra.dtsi
> > @@ -22,6 +22,11 @@
> >                 };
> >         };
> > 
> > +       device-info {
> > +               nvmem-cells = <&lru_part_number>;
> > +               nvmem-cell-names = "lru-part-number";
> > +       };
> > +
> >         aliases {
> >                 ethernet0 = &fec1;
> >                 ethernet1 = &i210;
> > @@ -64,6 +69,11 @@
> >  &uart2 {
> >         rave-sp {
> >                 eeprom@a4 {
> > +                       lru_part_number: lru-part-number@21 {
> > +                               reg = <0x21 15>;
> > +                               read-only;
> > +                       };
> > +
> >                         mac_address_0: mac-address@180 {
> >                                 reg = <0x180 6>;
> >                         };
> > --
> > 2.20.1
> > 
> > 
> > _______________________________________________
> > barebox mailing list
> > barebox@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/barebox


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