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layerscape: add i2c peripherials on LS1012A-RDB 

LS1012A-RDB equipped in some i2c devices:
  - 3x GPIO Expander: PCAL9555A (NXP)
  - Gyro: FXAS21002 (NXP)
  - Accelerometer: FXOS8700 (NXP)
  - Current & Power Monitor: INA220 (TI)

This patch enables i2c peripherials installed on LS1012A-RDB.

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
This commit is contained in:
Pawel Dembicki 2020-10-27 09:52:31 +01:00 committed by Petr Štetiar
parent a1158b3170
commit 4dc27a026b
4 changed files with 141 additions and 0 deletions
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3
target/linux/layerscape/armv8_64b/config-5.4
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@ -419,9 +419,12 @@ CONFIG_GENERIC_TIME_VSYSCALL=y
# CONFIG_GIANFAR is not set
CONFIG_GLOB=y
CONFIG_GPIOLIB=y
CONFIG_GPIOLIB_IRQCHIP=y
CONFIG_GPIO_GENERIC=y
CONFIG_GPIO_GENERIC_PLATFORM=y
CONFIG_GPIO_MPC8XXX=y
CONFIG_GPIO_PCA953X=y
CONFIG_GPIO_PCA953X_IRQ=y
CONFIG_HANDLE_DOMAIN_IRQ=y
CONFIG_HARDEN_BRANCH_PREDICTOR=y
CONFIG_HARDIRQS_SW_RESEND=y

3
target/linux/layerscape/image/armv8_64b.mk
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@ -63,6 +63,9 @@ define Device/fsl_ls1012a-rdb
DEVICE_PACKAGES += \
layerscape-ppfe \
tfa-ls1012a-rdb \
kmod-hwmon-ina2xx \
kmod-iio-fxas21002c-i2c \
kmod-iio-fxos8700-i2c \
kmod-ppfe
IMAGE/firmware.bin := \
ls-clean | \

107
target/linux/layerscape/patches-5.4/900-layerscape_fix_support_of_LS1012A-RDB.patch Normal file
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@ -0,0 +1,107 @@
From 650480191492845c8eb7e0c2e5b1e37cabc59eff Mon Sep 17 00:00:00 2001
From: Pawel Dembicki <paweldembicki@gmail.com>
Date: Fri, 13 Nov 2020 07:17:39 +0100
Subject: [PATCH 1/2] arm64: dts: fsl-ls1012a-rdb: add i2c devices
LS1012A-RDB equipped in some i2c devices:
- 3x GPIO Expander: PCAL9555A (NXP)
- Gyro: FXAS21002 (NXP)
- Accelerometer: FXOS8700 (NXP)
- Current & Power Monitor: INA220 (TI)
This patch add listed devices to dts.
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
.../boot/dts/freescale/fsl-ls1012a-rdb.dts | 66 +++++++++++++++++++
1 file changed, 66 insertions(+)
--- a/arch/arm64/boot/dts/freescale/fsl-ls1012a-rdb.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1012a-rdb.dts
@@ -7,6 +7,7 @@
*/
/dts-v1/;
+#include <dt-bindings/interrupt-controller/irq.h>
#include "fsl-ls1012a.dtsi"
/ {
@@ -16,6 +17,25 @@
aliases {
ethernet0 = &pfe_mac0;
ethernet1 = &pfe_mac1;
+ serial0 = &duart0;
+ };
+
+ dummy3v3: dummy_reg {
+ compatible = "regulator-fixed";
+ regulator-name = "dummy_regulator_3v3";
+
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-always-on;
+ };
+
+ dummy1v8: dummy_reg {
+ compatible = "regulator-fixed";
+ regulator-name = "dummy_regulator_1v8";
+
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
};
};
@@ -42,6 +62,52 @@
&i2c0 {
status = "okay";
+
+ accelerometer@1e {
+ compatible = "nxp,fxos8700";
+ reg = <0x1e>;
+ interrupt-parent = <&gpio26>;
+ interrupts = <13 IRQ_TYPE_EDGE_RISING>;
+ interrupt-names = "INT1";
+ };
+
+ gyroscope@20 {
+ compatible = "nxp,fxas21002c";
+ reg = <0x20>;
+ vdd-supply = <&dummy3v3>;
+ vddio-supply = <&dummy1v8>;
+ };
+
+ gpio@24 {
+ compatible = "nxp,pcal9555a";
+ reg = <0x24>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ };
+
+ gpio25: gpio@25 {
+ compatible = "nxp,pcal9555a";
+ reg = <0x25>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ };
+
+ gpio26: gpio@26 {
+ compatible = "nxp,pcal9555a";
+ reg = <0x26>;
+ interrupt-parent = <&gpio0>;
+ interrupts = <13 IRQ_TYPE_EDGE_FALLING>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ };
+
+ current-sensor@40 {
+ compatible = "ti,ina220";
+ reg = <0x40>;
+ shunt-resistor = <2000>;
+ };
};
&sata {

28
target/linux/layerscape/patches-5.4/901-fix_irq_type_of_pca953x.patch Normal file
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@ -0,0 +1,28 @@
From 12de4b5e7cbcd193d5abb753ca511fe8f2236846 Mon Sep 17 00:00:00 2001
From: Pawel Dembicki <paweldembicki@gmail.com>
Date: Fri, 13 Nov 2020 07:30:03 +0100
Subject: [PATCH 1/1] gpio-pca953x: hack: Allow to use falling trigger
Gpio-mpc8xxx driver of Layerscape gpio support only edge interrupts.
Gpio-pca953x allow only low state trigger. This hack fix the problem.
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -879,10 +879,12 @@ static int pca953x_irq_setup(struct pca9
for (i = 0; i < NBANK(chip); i++)
chip->irq_stat[i] &= reg_direction[i];
mutex_init(&chip->irq_lock);
-
+ /* gpio-mpc8xxx driver of Layerscape gpio support only edge interrupts.
+ * This hack fix the problem.
+ */
ret = devm_request_threaded_irq(&client->dev, client->irq,
NULL, pca953x_irq_handler,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT |
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
IRQF_SHARED,
dev_name(&client->dev), chip);
if (ret) {