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drv8424_mmi: stepper motor driver

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Initial driver code for TI DRV8424 stepper motor. Based on AW8646
from Awinic. This is just to create an entry point. Needs a lot
of work

Change-Id: Ied7eb3f05801f457494feff098c3b78b3813d30b
Signed-off-by: Konstantin Makariev <hcv867@motorola.com>
Reviewed-on: https://gerrit.mot.com/2231338
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Qing Chang <qing@motorola.com>
Submit-Approved: Jira Key
This commit is contained in:
Konstantin Makariev 2022-03-17 18:47:36 -05:00 • committed by Konstantin Makariev
commit f488925336
5 changed files with 1879 additions and 0 deletions
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8
drivers/misc/drv8424/Android.mk Normal file
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DLKM_DIR := motorola/kernel/modules
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := drv8424_mmi.ko
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE_PATH := $(KERNEL_MODULES_OUT)
include $(DLKM_DIR)/AndroidKernelModule.mk

10
drivers/misc/drv8424/Kbuild Normal file
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# add -Wall to try to catch everything we can.
EXTRA_CFLAGS += -Wall
EXTRA_CFLAGS += -I$(TOP)/motorola/kernel/modules/include
#ifeq ($(CONFIG_LIBER_DTB), y)
#EXTRA_CFLAGS += -DCONFIG_USE_HW_CLK
#endif
obj-m := drv8424_mmi.o
drv8424_mmi-objs := drv8424.o

10
drivers/misc/drv8424/Makefile Normal file
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KERNEL_SRC ?= /lib/modules/$(shell uname -r)/build
all:
$(MAKE) -C $(KERNEL_SRC) M=$(shell pwd) modules $(KBUILD_OPTIONS)
modules_install:
$(MAKE) INSTALL_MOD_STRIP=1 -C $(KERNEL_SRC) M=$(shell pwd) modules_install
clean:
$(MAKE) -C $(KERNEL_SRC) M=$(PWD) clean

215
drivers/misc/drv8424/device_tree.dtsi Normal file
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&tlmm {
drv8424_gpios {
drv8424_mode0_low: drv8424_mode0_low {
mux {
pins = "gpio70";
function = "gpio";
};
config {
pins = "gpio70";
drive-strength = <2>; /* 2 MA */
output-low;
};
};
drv8424_mode0_high: drv8424_mode0_high {
mux {
pins = "gpio70";
function = "gpio";
};
config {
pins = "gpio70";
drive-strength = <2>; /* 2 MA */
output-high;
};
};
drv8424_mode0_disable: drv8424_mode0_disable {
mux {
pins = "gpio70";
function = "gpio";
};
config {
pins = "gpio70";
input-enable;
bias-disable;
};
};
drv8424_mode1_low: drv8424_mode1_low {
mux {
pins = "gpio71";
function = "gpio";
};
config {
pins = "gpio71";
drive-strength = <2>; /* 2 MA */
output-low;
};
};
drv8424_mode1_high: drv8424_mode1_high {
mux {
pins = "gpio71";
function = "gpio";
};
config {
pins = "gpio71";
drive-strength = <2>; /* 2 MA */
output-high;
};
};
drv8424_mode1_disable: drv8424_mode1_disable {
mux {
pins = "gpio71";
function = "gpio";
};
config {
pins = "gpio71";
input-enable;
bias-disable;
};
};
drv8424_t0_low: drv8424_t0_low {
mux {
pins = "gpio49";
function = "gpio";
};
config {
pins = "gpio49";
drive-strength = <2>; /* 2 MA */
output-low;
};
};
drv8424_t0_high: drv8424_t0_high {
mux {
pins = "gpio49";
function = "gpio";
};
config {
pins = "gpio49";
drive-strength = <2>; /* 2 MA */
output-high;
};
};
drv8424_t0_disable: drv8424_t0_disable {
mux {
pins = "gpio49";
function = "gpio";
};
config {
pins = "gpio49";
input-enable;
bias-disable;
};
};
drv8424_t1_low: drv8424_t1_low {
mux {
pins = "gpio33";
function = "gpio";
};
config {
pins = "gpio33";
drive-strength = <2>; /* 2 MA */
output-low;
};
};
drv8424_t1_high: drv8424_t1_high {
mux {
pins = "gpio33";
function = "gpio";
};
config {
pins = "gpio33";
drive-strength = <2>; /* 2 MA */
output-high;
};
};
drv8424_t1_disable: drv8424_t1_disable {
mux {
pins = "gpio33";
function = "gpio";
};
config {
pins = "gpio33";
input-enable;
bias-disable;
};
};
drv8424_int_default: drv8424_int_default {
mux {
pins = "gpio57";
function = "gpio";
};
config {
pins = "gpio57";
drive-strength = <6>;
input-enable;
bias-disable;
};
};
drv8424_clk_active: drv8424_clk_active {
mux {
pins = "gpio21";
function = "gcc_gp2";
};
config {
pins = "gpio21";
drive-strength = <2>; /* 2 MA */
bias-pull-none;
};
};
drv8424_clk_sleep: drv8424_clk_sleep {
mux {
pins = "gpio21";
function = "gpio";
};
config {
pins = "gpio21";
/* drive-strength = <2>; */ /* 2 MA */
/* bias-pull-down; */
input-enable;
bias-disable;
};
};
};
};
&soc {
moto_drv8424_support {
compatible = "moto,drv8424";
status = "ok"
pinctrl-names = "m0_low", "m0_high", "m0_disable",
"m1_low", "m1_high", "m1_disable",
"t0_low", "t0_high", "t0_disable",
"t1_low", "t1_high", "t1_disable",
"drv8424_int_default",
"drv8424_clk_active", "drv8424_clk_sleep";
pinctrl-0 = <&drv8424_mode0_low>;
pinctrl-1 = <&drv8424_mode0_high>;
pinctrl-2 = <&drv8424_mode0_disable>;
pinctrl-3 = <&drv8424_mode1_low>;
pinctrl-4 = <&drv8424_mode1_high>;
pinctrl-5 = <&drv8424_mode1_disable>;
pinctrl-6 = <&drv8424_t0_low>;
pinctrl-7 = <&drv8424_t0_high>;
pinctrl-8 = <&drv8424_t0_disable>;
pinctrl-9 = <&drv8424_t1_low>;
pinctrl-10 = <&drv8424_t1_high>;
pinctrl-11 = <&drv8424_t1_disable>;
pinctrl-12 = <&drv8424_int_default>;
pinctrl-13 = <&drv8424_clk_active>;
pinctrl-14 = <&drv8424_clk_sleep>;
interrupt-parent = <&tlmm>;
interrupts = <57 0x2002>;
drv8424-gpios = <52 57 21 32 30 51 29 50 49 33>;
drv8424-gpios-cells = <10>;
drv8424-max-freq = <250000>;
clocks = <&clock_gcc 36>;
clock-names = "gcc_gp2";
vdd-supply = <&pm6150_l13>;
enable-hw-clock;
power-default-off;
};
};

1636
drivers/misc/drv8424/drv8424.c Normal file
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