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[PATCH v2 10/22] ARM: dts: r7s72100: Add generic compatible string for I2C EEPROM

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  [PATCH v2 10/22] ARM: dts: r7s72100: Add generic compatible string for I2C EEPROM Javier Martinez Canillas <javier@osg.samsung.com> - 2017-04-13 20:40 +0200
    Re: [PATCH v2 10/22] ARM: dts: r7s72100: Add generic compatible  string for I2C EEPROM Geert Uytterhoeven <geert@linux-m68k.org> - 2017-04-13 22:00 +0200

#1623255 — [PATCH v2 10/22] ARM: dts: r7s72100: Add generic compatible string for I2C EEPROM

The at24 driver allows to register I2C EEPROM chips using different vendor
and devices, but the I2C subsystem does not take the vendor into account
when matching using the I2C table since it only has device entries.

But when matching using an OF table, both the vendor and device has to be
taken into account so the driver defines only a set of compatible strings
using the "atmel" vendor as a generic fallback for compatible I2C devices.

So add this generic fallback to the device node compatible string to make
the device to match the driver using the OF device ID table.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
---

Changes in v2: None

 arch/arm/boot/dts/r7s72100-genmai.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/r7s72100-genmai.dts b/arch/arm/boot/dts/r7s72100-genmai.dts
index 52a7b586bac7..46dc6d293cb3 100644
--- a/arch/arm/boot/dts/r7s72100-genmai.dts
+++ b/arch/arm/boot/dts/r7s72100-genmai.dts
@@ -57,7 +57,7 @@
 	clock-frequency = <400000>;
 
 	eeprom@50 {
-		compatible = "renesas,24c128";
+		compatible = "renesas,24c128","atmel,24c128";
 		reg = <0x50>;
 		pagesize = <64>;
 	};
-- 
2.9.3

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#1623313 — Re: [PATCH v2 10/22] ARM: dts: r7s72100: Add generic compatible string for I2C EEPROM

On Thu, Apr 13, 2017 at 8:28 PM, Javier Martinez Canillas
<javier@osg.samsung.com> wrote:
> The at24 driver allows to register I2C EEPROM chips using different vendor
> and devices, but the I2C subsystem does not take the vendor into account
> when matching using the I2C table since it only has device entries.
>
> But when matching using an OF table, both the vendor and device has to be
> taken into account so the driver defines only a set of compatible strings
> using the "atmel" vendor as a generic fallback for compatible I2C devices.
>
> So add this generic fallback to the device node compatible string to make
> the device to match the driver using the OF device ID table.
>
> Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

> --- a/arch/arm/boot/dts/r7s72100-genmai.dts
> +++ b/arch/arm/boot/dts/r7s72100-genmai.dts
> @@ -57,7 +57,7 @@
>         clock-frequency = <400000>;
>
>         eeprom@50 {
> -               compatible = "renesas,24c128";
> +               compatible = "renesas,24c128","atmel,24c128";

Missing space after comma.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

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