Re: [PATCH] arm64: dts: ls1046a: fix eeprom entries

On Mon, Aug 02, 2021 at 05:44:29PM -0500, Li Yang wrote:

On Mon, Aug 2, 2021 at 1:10 PM Raag Jadav [off-list ref] wrote:

quoted

ls1046afrwy and ls1046ardb boards have CAT24C04[1] and CAT24C05[2]
eeproms respectively. Both are 4Kb (512 bytes) in size.

These part names are from onsemi instead of atmel.  Are there same
part names from atmel which are also compatible with the onsemi parts?

The part names are different, but they are functionally compatible.

 If we want to use onsemi only part names, probably we will need two
compatible strings with the first one from onsemi and the second from
atmel.  Although the binding doesn't support onsemi prefix yet.

Should I add it to the at24 binding document with atmel as a fallback?

quoted

Remove multi-address entries, as we have auto-rollover support
in at24 driver.

The device tree should describe hardware instead of matching how
driver deal with it.  Is the board really using a single chip or
multiple chips here?

Yes, both the boards have a single chip each.

quoted

[1] https://www.onsemi.com/pdf/datasheet/cat24c01-d.pdf
[2] https://www.onsemi.com/pdf/datasheet/cat24c03-d.pdf

Signed-off-by: Raag Jadav <redacted>
---
 arch/arm64/boot/dts/freescale/fsl-ls1046a-frwy.dts | 8 +-------
 arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts  | 7 +------
 2 files changed, 2 insertions(+), 13 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1046a-frwy.dts b/arch/arm64/boot/dts/freescale/fsl-ls1046a-frwy.dts
index db3d303..83afe21 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1046a-frwy.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1046a-frwy.dts

@@ -83,15 +83,9 @@
                        };

                        eeprom@52 {
-                               compatible = "atmel,24c512";
+                               compatible = "atmel,24c04";
                                reg = <0x52>;
                        };
-
-                       eeprom@53 {
-                               compatible = "atmel,24c512";
-                               reg = <0x53>;
-                       };
-
                };
        };
 };

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts
index 60acdf0..d220f98 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1046a-rdb.dts

@@ -59,14 +59,9 @@
        };

        eeprom@52 {
-               compatible = "atmel,24c512";
+               compatible = "atmel,24c04";
                reg = <0x52>;
        };
-
-       eeprom@53 {
-               compatible = "atmel,24c512";
-               reg = <0x53>;
-       };
 };

 &i2c3 {
--

2.7.4