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From de7880016665afe7fa7d40e1fafa859260d53ba1 Mon Sep 17 00:00:00 2001
From: Christian Lamparter <chunkeey@gmail.com>
Date: Thu, 28 Oct 2021 09:03:44 +0200
Subject: [PATCH] ARM: BCM53016: MR32: convert to Broadcom iProc I2C Driver
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
replaces the bit-banged i2c-gpio provided i2c functionality
with the hardware in the SoC.
During review of the MR32, Florian Fainelli pointed out that the
SoC has a real I2C-controller. Furthermore, the connected pins
(SDA and SCL) would line up perfectly for use. Back then I couldn't
get it working though and I left it with i2c-gpio (which worked).
Now we know the reason: the interrupt was incorrectly specified.
(Hence, this patch depends on Florian Fainelli's
"ARM: dts: BCM5301X: Fix I2C controller interrupt" patch).
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Rafał Miłecki <zajec5@gmail.com>
Cc: Matthew Hagan <mnhagan88@gmail.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
arch/arm/boot/dts/bcm53016-meraki-mr32.dts | 62 ++++++++++------------
1 file changed, 28 insertions(+), 34 deletions(-)
--- a/arch/arm/boot/dts/bcm53016-meraki-mr32.dts
+++ b/arch/arm/boot/dts/bcm53016-meraki-mr32.dts
@@ -84,40 +84,6 @@
max-brightness = <255>;
};
};
-
- i2c {
- /*
- * The platform provided I2C does not budge.
- * This is a replacement until I can figure
- * out what are the missing bits...
- */
-
- compatible = "i2c-gpio";
- sda-gpios = <&chipcommon 5 GPIO_ACTIVE_HIGH>;
- scl-gpios = <&chipcommon 4 GPIO_ACTIVE_HIGH>;
- i2c-gpio,delay-us = <10>; /* close to 100 kHz */
- #address-cells = <1>;
- #size-cells = <0>;
-
- current_sense: ina219@45 {
- compatible = "ti,ina219";
- reg = <0x45>;
- shunt-resistor = <60000>; /* = 60 mOhms */
- };
-
- eeprom: eeprom@50 {
- compatible = "atmel,24c64";
- reg = <0x50>;
- pagesize = <32>;
- read-only;
- #address-cells = <1>;
- #size-cells = <1>;
-
- mac_address: mac-address@66 {
- reg = <0x66 0x6>;
- };
- };
- };
};
&uart0 {
@@ -250,3 +216,31 @@
};
};
};
+
+&i2c0 {
+ status = "okay";
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinmux_i2c>;
+
+ clock-frequency = <100000>;
+
+ current_sense: ina219@45 {
+ compatible = "ti,ina219";
+ reg = <0x45>;
+ shunt-resistor = <60000>; /* = 60 mOhms */
+ };
+
+ eeprom: eeprom@50 {
+ compatible = "atmel,24c64";
+ reg = <0x50>;
+ pagesize = <32>;
+ read-only;
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ mac_address: mac-address@66 {
+ reg = <0x66 0x6>;
+ };
+ };
+};
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