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Make packages for kmod-i2c-mux-pinctrl and kmod-rtc-pcf85063 using sources

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taken from linux-5.10.146 and include them into the image.
This commit is contained in:
Lee Miller 2023-05-11 05:55:23 +03:00
parent 18475fca74
commit 0a0851250a
Signed by untrusted user: lee.miller
GPG Key ID: 4F97A5EA88F4AB63
10 changed files with 1620 additions and 2 deletions
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7
.buildbot/openwrt/build.sh
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@ -28,6 +28,8 @@ make defconfig
# Enable collectd network encryption
echo "CONFIG_PACKAGE_COLLECTD_ENCRYPTED_NETWORK=y" >> .config
make package/kmod-i2c-mux-pinctrl/compile
make package/kmod-rtc-pcf85063/compile
make package/asterisk-chan-quectel/compile
make package/collectd/compile
# no signing key
@ -55,8 +57,9 @@ echo "CONFIG_TARGET_ROOTFS_PARTSIZE=308" >> .config
# Disable ext4 images
echo "CONFIG_TARGET_ROOTFS_EXT4FS=n" >> .config
PACKAGES="kmod-i2c-bcm2835 kmod-i2c-mux kmod-nf-nathelper-extra \
kmod-rtc-ds1307 kmod-rtc-pcf8563 \
PACKAGES="kmod-i2c-bcm2835 kmod-i2c-mux kmod-i2c-mux-pinctrl \
kmod-nf-nathelper-extra \
kmod-rtc-ds1307 kmod-rtc-pcf8563 kmod-rtc-pcf85063 \
kmod-usb-audio kmod-usb-net-rtl8152 \
alsa-lib pciutils usbutils \
kmod-usb-net-qmi-wwan libqmi qmi-utils uqmi luci-proto-qmi \

41
feed/kmod-i2c-mux-pinctrl/Makefile Normal file
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@ -0,0 +1,41 @@
include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
PKG_NAME:=i2c-mux-pinctrl
PKG_RELEASE:=1
include $(INCLUDE_DIR)/package.mk
define KernelPackage/$(PKG_NAME)
SUBMENU:=I2C support
TITLE:=pinctrl-based I2C multiplexer
DEPENDS:=+kmod-i2c-mux
AUTOLOAD:=$(call AutoLoad,51,i2c-mux-pinctrl,1)
FILES:=$(PKG_BUILD_DIR)/i2c-mux-pinctrl.ko
KCONFIG:=
endef
define KernelPackage/$(PKG_NAME)/description
Kernel modules for GENERIC_PINCTRL I2C bus mux/switching devices
endef
EXTRA_KCONFIG:= \
CONFIG_I2C_MUX_PINCTRL=m
EXTRA_CFLAGS:= \
$(patsubst CONFIG_%, -DCONFIG_%=1, $(patsubst %=m,%,$(filter %=m,$(EXTRA_KCONFIG)))) \
$(patsubst CONFIG_%, -DCONFIG_%=1, $(patsubst %=y,%,$(filter %=y,$(EXTRA_KCONFIG)))) \
MAKE_OPTS:= \
$(KERNEL_MAKE_FLAGS) \
M="$(PKG_BUILD_DIR)" \
EXTRA_CFLAGS="$(EXTRA_CFLAGS)" \
$(EXTRA_KCONFIG)
define Build/Compile
$(MAKE) -C "$(LINUX_DIR)" \
$(MAKE_OPTS) \
modules
endef
$(eval $(call KernelPackage,$(PKG_NAME)))

8
feed/kmod-i2c-mux-pinctrl/src/Makefile Normal file
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@ -0,0 +1,8 @@
# SPDX-License-Identifier: GPL-2.0
#
# Makefile for multiplexer I2C chip drivers.
obj-$(CONFIG_I2C_MUX_GPIO) += i2c-mux-gpio.o
obj-$(CONFIG_I2C_MUX_PINCTRL) += i2c-mux-pinctrl.o
ccflags-$(CONFIG_I2C_DEBUG_BUS) := -DDEBUG

184
feed/kmod-i2c-mux-pinctrl/src/gpiolib.h Normal file
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@ -0,0 +1,184 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Internal GPIO functions.
*
* Copyright (C) 2013, Intel Corporation
* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
*/
#ifndef GPIOLIB_H
#define GPIOLIB_H
#include <linux/gpio/driver.h>
#include <linux/gpio/consumer.h> /* for enum gpiod_flags */
#include <linux/err.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/cdev.h>
#define GPIOCHIP_NAME "gpiochip"
/**
* struct gpio_device - internal state container for GPIO devices
* @id: numerical ID number for the GPIO chip
* @dev: the GPIO device struct
* @chrdev: character device for the GPIO device
* @mockdev: class device used by the deprecated sysfs interface (may be
* NULL)
* @owner: helps prevent removal of modules exporting active GPIOs
* @chip: pointer to the corresponding gpiochip, holding static
* data for this device
* @descs: array of ngpio descriptors.
* @ngpio: the number of GPIO lines on this GPIO device, equal to the size
* of the @descs array.
* @base: GPIO base in the DEPRECATED global Linux GPIO numberspace, assigned
* at device creation time.
* @label: a descriptive name for the GPIO device, such as the part number
* or name of the IP component in a System on Chip.
* @data: per-instance data assigned by the driver
* @list: links gpio_device:s together for traversal
*
* This state container holds most of the runtime variable data
* for a GPIO device and can hold references and live on after the
* GPIO chip has been removed, if it is still being used from
* userspace.
*/
struct gpio_device {
int id;
struct device dev;
struct cdev chrdev;
struct device *mockdev;
struct module *owner;
struct gpio_chip *chip;
struct gpio_desc *descs;
int base;
u16 ngpio;
const char *label;
void *data;
struct list_head list;
struct blocking_notifier_head notifier;
#ifdef CONFIG_PINCTRL
/*
* If CONFIG_PINCTRL is enabled, then gpio controllers can optionally
* describe the actual pin range which they serve in an SoC. This
* information would be used by pinctrl subsystem to configure
* corresponding pins for gpio usage.
*/
struct list_head pin_ranges;
#endif
};
/* gpio suffixes used for ACPI and device tree lookup */
static __maybe_unused const char * const gpio_suffixes[] = { "gpios", "gpio" };
struct gpio_array {
struct gpio_desc **desc;
unsigned int size;
struct gpio_chip *chip;
unsigned long *get_mask;
unsigned long *set_mask;
unsigned long invert_mask[];
};
struct gpio_desc *gpiochip_get_desc(struct gpio_chip *gc, unsigned int hwnum);
int gpiod_get_array_value_complex(bool raw, bool can_sleep,
unsigned int array_size,
struct gpio_desc **desc_array,
struct gpio_array *array_info,
unsigned long *value_bitmap);
int gpiod_set_array_value_complex(bool raw, bool can_sleep,
unsigned int array_size,
struct gpio_desc **desc_array,
struct gpio_array *array_info,
unsigned long *value_bitmap);
extern spinlock_t gpio_lock;
extern struct list_head gpio_devices;
struct gpio_desc {
struct gpio_device *gdev;
unsigned long flags;
/* flag symbols are bit numbers */
#define FLAG_REQUESTED 0
#define FLAG_IS_OUT 1
#define FLAG_EXPORT 2 /* protected by sysfs_lock */
#define FLAG_SYSFS 3 /* exported via /sys/class/gpio/control */
#define FLAG_ACTIVE_LOW 6 /* value has active low */
#define FLAG_OPEN_DRAIN 7 /* Gpio is open drain type */
#define FLAG_OPEN_SOURCE 8 /* Gpio is open source type */
#define FLAG_USED_AS_IRQ 9 /* GPIO is connected to an IRQ */
#define FLAG_IRQ_IS_ENABLED 10 /* GPIO is connected to an enabled IRQ */
#define FLAG_IS_HOGGED 11 /* GPIO is hogged */
#define FLAG_TRANSITORY 12 /* GPIO may lose value in sleep or reset */
#define FLAG_PULL_UP 13 /* GPIO has pull up enabled */
#define FLAG_PULL_DOWN 14 /* GPIO has pull down enabled */
#define FLAG_BIAS_DISABLE 15 /* GPIO has pull disabled */
#define FLAG_EDGE_RISING 16 /* GPIO CDEV detects rising edge events */
#define FLAG_EDGE_FALLING 17 /* GPIO CDEV detects falling edge events */
/* Connection label */
const char *label;
/* Name of the GPIO */
const char *name;
#ifdef CONFIG_OF_DYNAMIC
struct device_node *hog;
#endif
#ifdef CONFIG_GPIO_CDEV
/* debounce period in microseconds */
unsigned int debounce_period_us;
#endif
};
int gpiod_request(struct gpio_desc *desc, const char *label);
void gpiod_free(struct gpio_desc *desc);
int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
unsigned long lflags, enum gpiod_flags dflags);
int gpiod_hog(struct gpio_desc *desc, const char *name,
unsigned long lflags, enum gpiod_flags dflags);
/*
* Return the GPIO number of the passed descriptor relative to its chip
*/
static inline int gpio_chip_hwgpio(const struct gpio_desc *desc)
{
return desc - &desc->gdev->descs[0];
}
/* With descriptor prefix */
#define gpiod_emerg(desc, fmt, ...) \
pr_emerg("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
##__VA_ARGS__)
#define gpiod_crit(desc, fmt, ...) \
pr_crit("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
##__VA_ARGS__)
#define gpiod_err(desc, fmt, ...) \
pr_err("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
##__VA_ARGS__)
#define gpiod_warn(desc, fmt, ...) \
pr_warn("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
##__VA_ARGS__)
#define gpiod_info(desc, fmt, ...) \
pr_info("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
##__VA_ARGS__)
#define gpiod_dbg(desc, fmt, ...) \
pr_debug("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
##__VA_ARGS__)
/* With chip prefix */
#define chip_emerg(gc, fmt, ...) \
dev_emerg(&gc->gpiodev->dev, "(%s): " fmt, gc->label, ##__VA_ARGS__)
#define chip_crit(gc, fmt, ...) \
dev_crit(&gc->gpiodev->dev, "(%s): " fmt, gc->label, ##__VA_ARGS__)
#define chip_err(gc, fmt, ...) \
dev_err(&gc->gpiodev->dev, "(%s): " fmt, gc->label, ##__VA_ARGS__)
#define chip_warn(gc, fmt, ...) \
dev_warn(&gc->gpiodev->dev, "(%s): " fmt, gc->label, ##__VA_ARGS__)
#define chip_info(gc, fmt, ...) \
dev_info(&gc->gpiodev->dev, "(%s): " fmt, gc->label, ##__VA_ARGS__)
#define chip_dbg(gc, fmt, ...) \
dev_dbg(&gc->gpiodev->dev, "(%s): " fmt, gc->label, ##__VA_ARGS__)
#endif /* GPIOLIB_H */

243
feed/kmod-i2c-mux-pinctrl/src/i2c-mux-gpio.c Normal file
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@ -0,0 +1,243 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* I2C multiplexer using GPIO API
*
* Peter Korsgaard <peter.korsgaard@barco.com>
*/
#include <linux/i2c.h>
#include <linux/i2c-mux.h>
#include <linux/platform_data/i2c-mux-gpio.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/bits.h>
#include <linux/gpio/consumer.h>
/* FIXME: stop poking around inside gpiolib */
#include "gpiolib.h"
struct gpiomux {
struct i2c_mux_gpio_platform_data data;
int ngpios;
struct gpio_desc **gpios;
};
static void i2c_mux_gpio_set(const struct gpiomux *mux, unsigned val)
{
DECLARE_BITMAP(values, BITS_PER_TYPE(val));
values[0] = val;
gpiod_set_array_value_cansleep(mux->ngpios, mux->gpios, NULL, values);
}
static int i2c_mux_gpio_select(struct i2c_mux_core *muxc, u32 chan)
{
struct gpiomux *mux = i2c_mux_priv(muxc);
i2c_mux_gpio_set(mux, chan);
return 0;
}
static int i2c_mux_gpio_deselect(struct i2c_mux_core *muxc, u32 chan)
{
struct gpiomux *mux = i2c_mux_priv(muxc);
i2c_mux_gpio_set(mux, mux->data.idle);
return 0;
}
#ifdef CONFIG_OF
static int i2c_mux_gpio_probe_dt(struct gpiomux *mux,
struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct device_node *adapter_np, *child;
struct i2c_adapter *adapter;
unsigned *values;
int i = 0;
if (!np)
return -ENODEV;
adapter_np = of_parse_phandle(np, "i2c-parent", 0);
if (!adapter_np) {
dev_err(&pdev->dev, "Cannot parse i2c-parent\n");
return -ENODEV;
}
adapter = of_find_i2c_adapter_by_node(adapter_np);
of_node_put(adapter_np);
if (!adapter)
return -EPROBE_DEFER;
mux->data.parent = i2c_adapter_id(adapter);
put_device(&adapter->dev);
mux->data.n_values = of_get_child_count(np);
values = devm_kcalloc(&pdev->dev,
mux->data.n_values, sizeof(*mux->data.values),
GFP_KERNEL);
if (!values) {
dev_err(&pdev->dev, "Cannot allocate values array");
return -ENOMEM;
}
for_each_child_of_node(np, child) {
of_property_read_u32(child, "reg", values + i);
i++;
}
mux->data.values = values;
if (of_property_read_u32(np, "idle-state", &mux->data.idle))
mux->data.idle = I2C_MUX_GPIO_NO_IDLE;
return 0;
}
#else
static int i2c_mux_gpio_probe_dt(struct gpiomux *mux,
struct platform_device *pdev)
{
return 0;
}
#endif
static int i2c_mux_gpio_probe(struct platform_device *pdev)
{
struct i2c_mux_core *muxc;
struct gpiomux *mux;
struct i2c_adapter *parent;
struct i2c_adapter *root;
unsigned initial_state;
int i, ngpios, ret;
mux = devm_kzalloc(&pdev->dev, sizeof(*mux), GFP_KERNEL);
if (!mux)
return -ENOMEM;
if (!dev_get_platdata(&pdev->dev)) {
ret = i2c_mux_gpio_probe_dt(mux, pdev);
if (ret < 0)
return ret;
} else {
memcpy(&mux->data, dev_get_platdata(&pdev->dev),
sizeof(mux->data));
}
ngpios = gpiod_count(&pdev->dev, "mux");
if (ngpios <= 0) {
dev_err(&pdev->dev, "no valid gpios provided\n");
return ngpios ?: -EINVAL;
}
mux->ngpios = ngpios;
parent = i2c_get_adapter(mux->data.parent);
if (!parent)
return -EPROBE_DEFER;
muxc = i2c_mux_alloc(parent, &pdev->dev, mux->data.n_values,
ngpios * sizeof(*mux->gpios), 0,
i2c_mux_gpio_select, NULL);
if (!muxc) {
ret = -ENOMEM;
goto alloc_failed;
}
mux->gpios = muxc->priv;
muxc->priv = mux;
platform_set_drvdata(pdev, muxc);
root = i2c_root_adapter(&parent->dev);
muxc->mux_locked = true;
if (mux->data.idle != I2C_MUX_GPIO_NO_IDLE) {
initial_state = mux->data.idle;
muxc->deselect = i2c_mux_gpio_deselect;
} else {
initial_state = mux->data.values[0];
}
for (i = 0; i < ngpios; i++) {
struct device *gpio_dev;
struct gpio_desc *gpiod;
enum gpiod_flags flag;
if (initial_state & BIT(i))
flag = GPIOD_OUT_HIGH;
else
flag = GPIOD_OUT_LOW;
gpiod = devm_gpiod_get_index(&pdev->dev, "mux", i, flag);
if (IS_ERR(gpiod)) {
ret = PTR_ERR(gpiod);
goto alloc_failed;
}
mux->gpios[i] = gpiod;
if (!muxc->mux_locked)
continue;
/* FIXME: find a proper way to access the GPIO device */
gpio_dev = &gpiod->gdev->dev;
muxc->mux_locked = i2c_root_adapter(gpio_dev) == root;
}
if (muxc->mux_locked)
dev_info(&pdev->dev, "mux-locked i2c mux\n");
for (i = 0; i < mux->data.n_values; i++) {
u32 nr = mux->data.base_nr ? (mux->data.base_nr + i) : 0;
unsigned int class = mux->data.classes ? mux->data.classes[i] : 0;
ret = i2c_mux_add_adapter(muxc, nr, mux->data.values[i], class);
if (ret)
goto add_adapter_failed;
}
dev_info(&pdev->dev, "%d port mux on %s adapter\n",
mux->data.n_values, parent->name);
return 0;
add_adapter_failed:
i2c_mux_del_adapters(muxc);
alloc_failed:
i2c_put_adapter(parent);
return ret;
}
static int i2c_mux_gpio_remove(struct platform_device *pdev)
{
struct i2c_mux_core *muxc = platform_get_drvdata(pdev);
i2c_mux_del_adapters(muxc);
i2c_put_adapter(muxc->parent);
return 0;
}
static const struct of_device_id i2c_mux_gpio_of_match[] = {
{ .compatible = "i2c-mux-gpio", },
{},
};
MODULE_DEVICE_TABLE(of, i2c_mux_gpio_of_match);
static struct platform_driver i2c_mux_gpio_driver = {
.probe = i2c_mux_gpio_probe,
.remove = i2c_mux_gpio_remove,
.driver = {
.name = "i2c-mux-gpio",
.of_match_table = i2c_mux_gpio_of_match,
},
};
module_platform_driver(i2c_mux_gpio_driver);
MODULE_DESCRIPTION("GPIO-based I2C multiplexer driver");
MODULE_AUTHOR("Peter Korsgaard <peter.korsgaard@barco.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:i2c-mux-gpio");

198
feed/kmod-i2c-mux-pinctrl/src/i2c-mux-pinctrl.c Normal file
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@ -0,0 +1,198 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* I2C multiplexer using pinctrl API
*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
*/
#include <linux/i2c.h>
#include <linux/i2c-mux.h>
#include <linux/module.h>
#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of.h>
#include "pinctrl_core.h"
struct i2c_mux_pinctrl {
struct pinctrl *pinctrl;
struct pinctrl_state *states[];
};
static int i2c_mux_pinctrl_select(struct i2c_mux_core *muxc, u32 chan)
{
struct i2c_mux_pinctrl *mux = i2c_mux_priv(muxc);
return pinctrl_select_state(mux->pinctrl, mux->states[chan]);
}
static int i2c_mux_pinctrl_deselect(struct i2c_mux_core *muxc, u32 chan)
{
return i2c_mux_pinctrl_select(muxc, muxc->num_adapters);
}
static struct i2c_adapter *i2c_mux_pinctrl_root_adapter(
struct pinctrl_state *state)
{
struct i2c_adapter *root = NULL;
struct pinctrl_setting *setting;
struct i2c_adapter *pin_root;
list_for_each_entry(setting, &state->settings, node) {
pin_root = i2c_root_adapter(setting->pctldev->dev);
if (!pin_root)
return NULL;
if (!root)
root = pin_root;
else if (root != pin_root)
return NULL;
}
return root;
}
static struct i2c_adapter *i2c_mux_pinctrl_parent_adapter(struct device *dev)
{
struct device_node *np = dev->of_node;
struct device_node *parent_np;
struct i2c_adapter *parent;
parent_np = of_parse_phandle(np, "i2c-parent", 0);
if (!parent_np) {
dev_err(dev, "Cannot parse i2c-parent\n");
return ERR_PTR(-ENODEV);
}
parent = of_find_i2c_adapter_by_node(parent_np);
of_node_put(parent_np);
if (!parent)
return ERR_PTR(-EPROBE_DEFER);
return parent;
}
static int i2c_mux_pinctrl_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct i2c_mux_core *muxc;
struct i2c_mux_pinctrl *mux;
struct i2c_adapter *parent;
struct i2c_adapter *root;
int num_names, i, ret;
const char *name;
num_names = of_property_count_strings(np, "pinctrl-names");
if (num_names < 0) {
dev_err(dev, "Cannot parse pinctrl-names: %d\n",
num_names);
return num_names;
}
parent = i2c_mux_pinctrl_parent_adapter(dev);
if (IS_ERR(parent))
return PTR_ERR(parent);
muxc = i2c_mux_alloc(parent, dev, num_names,
struct_size(mux, states, num_names),
0, i2c_mux_pinctrl_select, NULL);
if (!muxc) {
ret = -ENOMEM;
goto err_put_parent;
}
mux = i2c_mux_priv(muxc);
platform_set_drvdata(pdev, muxc);
mux->pinctrl = devm_pinctrl_get(dev);
if (IS_ERR(mux->pinctrl)) {
ret = PTR_ERR(mux->pinctrl);
dev_err(dev, "Cannot get pinctrl: %d\n", ret);
goto err_put_parent;
}
for (i = 0; i < num_names; i++) {
ret = of_property_read_string_index(np, "pinctrl-names", i,
&name);
if (ret < 0) {
dev_err(dev, "Cannot parse pinctrl-names: %d\n", ret);
goto err_put_parent;
}
mux->states[i] = pinctrl_lookup_state(mux->pinctrl, name);
if (IS_ERR(mux->states[i])) {
ret = PTR_ERR(mux->states[i]);
dev_err(dev, "Cannot look up pinctrl state %s: %d\n",
name, ret);
goto err_put_parent;
}
if (strcmp(name, "idle"))
continue;
if (i != num_names - 1) {
dev_err(dev, "idle state must be last\n");
ret = -EINVAL;
goto err_put_parent;
}
muxc->deselect = i2c_mux_pinctrl_deselect;
}
root = i2c_root_adapter(&muxc->parent->dev);
muxc->mux_locked = true;
for (i = 0; i < num_names; i++) {
if (root != i2c_mux_pinctrl_root_adapter(mux->states[i])) {
muxc->mux_locked = false;
break;
}
}
if (muxc->mux_locked)
dev_info(dev, "mux-locked i2c mux\n");
/* Do not add any adapter for the idle state (if it's there at all). */
for (i = 0; i < num_names - !!muxc->deselect; i++) {
ret = i2c_mux_add_adapter(muxc, 0, i, 0);
if (ret)
goto err_del_adapter;
}
return 0;
err_del_adapter:
i2c_mux_del_adapters(muxc);
err_put_parent:
i2c_put_adapter(parent);
return ret;
}
static int i2c_mux_pinctrl_remove(struct platform_device *pdev)
{
struct i2c_mux_core *muxc = platform_get_drvdata(pdev);
i2c_mux_del_adapters(muxc);
i2c_put_adapter(muxc->parent);
return 0;
}
static const struct of_device_id i2c_mux_pinctrl_of_match[] = {
{ .compatible = "i2c-mux-pinctrl", },
{},
};
MODULE_DEVICE_TABLE(of, i2c_mux_pinctrl_of_match);
static struct platform_driver i2c_mux_pinctrl_driver = {
.driver = {
.name = "i2c-mux-pinctrl",
.of_match_table = of_match_ptr(i2c_mux_pinctrl_of_match),
},
.probe = i2c_mux_pinctrl_probe,
.remove = i2c_mux_pinctrl_remove,
};
module_platform_driver(i2c_mux_pinctrl_driver);
MODULE_DESCRIPTION("pinctrl-based I2C multiplexer driver");
MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:i2c-mux-pinctrl");

249
feed/kmod-i2c-mux-pinctrl/src/pinctrl_core.h Normal file
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@ -0,0 +1,249 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Core private header for the pin control subsystem
*
* Copyright (C) 2011 ST-Ericsson SA
* Written on behalf of Linaro for ST-Ericsson
*
* Author: Linus Walleij <linus.walleij@linaro.org>
*/
#include <linux/kref.h>
#include <linux/mutex.h>
#include <linux/radix-tree.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/machine.h>
struct pinctrl_gpio_range;
/**
* struct pinctrl_dev - pin control class device
* @node: node to include this pin controller in the global pin controller list
* @desc: the pin controller descriptor supplied when initializing this pin
* controller
* @pin_desc_tree: each pin descriptor for this pin controller is stored in
* this radix tree
* @pin_group_tree: optionally each pin group can be stored in this radix tree
* @num_groups: optionally number of groups can be kept here
* @pin_function_tree: optionally each function can be stored in this radix tree
* @num_functions: optionally number of functions can be kept here
* @gpio_ranges: a list of GPIO ranges that is handled by this pin controller,
* ranges are added to this list at runtime
* @dev: the device entry for this pin controller
* @owner: module providing the pin controller, used for refcounting
* @driver_data: driver data for drivers registering to the pin controller
* subsystem
* @p: result of pinctrl_get() for this device
* @hog_default: default state for pins hogged by this device
* @hog_sleep: sleep state for pins hogged by this device
* @mutex: mutex taken on each pin controller specific action
* @device_root: debugfs root for this device
*/
struct pinctrl_dev {
struct list_head node;
struct pinctrl_desc *desc;
struct radix_tree_root pin_desc_tree;
#ifdef CONFIG_GENERIC_PINCTRL_GROUPS
struct radix_tree_root pin_group_tree;
unsigned int num_groups;
#endif
#ifdef CONFIG_GENERIC_PINMUX_FUNCTIONS
struct radix_tree_root pin_function_tree;
unsigned int num_functions;
#endif
struct list_head gpio_ranges;
struct device *dev;
struct module *owner;
void *driver_data;
struct pinctrl *p;
struct pinctrl_state *hog_default;
struct pinctrl_state *hog_sleep;
struct mutex mutex;
#ifdef CONFIG_DEBUG_FS
struct dentry *device_root;
#endif
};
/**
* struct pinctrl - per-device pin control state holder
* @node: global list node
* @dev: the device using this pin control handle
* @states: a list of states for this device
* @state: the current state
* @dt_maps: the mapping table chunks dynamically parsed from device tree for
* this device, if any
* @users: reference count
*/
struct pinctrl {
struct list_head node;
struct device *dev;
struct list_head states;
struct pinctrl_state *state;
struct list_head dt_maps;
struct kref users;
};
/**
* struct pinctrl_state - a pinctrl state for a device
* @node: list node for struct pinctrl's @states field
* @name: the name of this state
* @settings: a list of settings for this state
*/
struct pinctrl_state {
struct list_head node;
const char *name;
struct list_head settings;
};
/**
* struct pinctrl_setting_mux - setting data for MAP_TYPE_MUX_GROUP
* @group: the group selector to program
* @func: the function selector to program
*/
struct pinctrl_setting_mux {
unsigned group;
unsigned func;
};
/**
* struct pinctrl_setting_configs - setting data for MAP_TYPE_CONFIGS_*
* @group_or_pin: the group selector or pin ID to program
* @configs: a pointer to an array of config parameters/values to program into
* hardware. Each individual pin controller defines the format and meaning
* of config parameters.
* @num_configs: the number of entries in array @configs
*/
struct pinctrl_setting_configs {
unsigned group_or_pin;
unsigned long *configs;
unsigned num_configs;
};
/**
* struct pinctrl_setting - an individual mux or config setting
* @node: list node for struct pinctrl_settings's @settings field
* @type: the type of setting
* @pctldev: pin control device handling to be programmed. Not used for
* PIN_MAP_TYPE_DUMMY_STATE.
* @dev_name: the name of the device using this state
* @data: Data specific to the setting type
*/
struct pinctrl_setting {
struct list_head node;
enum pinctrl_map_type type;
struct pinctrl_dev *pctldev;
const char *dev_name;
union {
struct pinctrl_setting_mux mux;
struct pinctrl_setting_configs configs;
} data;
};
/**
* struct pin_desc - pin descriptor for each physical pin in the arch
* @pctldev: corresponding pin control device
* @name: a name for the pin, e.g. the name of the pin/pad/finger on a
* datasheet or such
* @dynamic_name: if the name of this pin was dynamically allocated
* @drv_data: driver-defined per-pin data. pinctrl core does not touch this
* @mux_usecount: If zero, the pin is not claimed, and @owner should be NULL.
* If non-zero, this pin is claimed by @owner. This field is an integer
* rather than a boolean, since pinctrl_get() might process multiple
* mapping table entries that refer to, and hence claim, the same group
* or pin, and each of these will increment the @usecount.
* @mux_owner: The name of device that called pinctrl_get().
* @mux_setting: The most recent selected mux setting for this pin, if any.
* @gpio_owner: If pinctrl_gpio_request() was called for this pin, this is
* the name of the GPIO that "owns" this pin.
*/
struct pin_desc {
struct pinctrl_dev *pctldev;
const char *name;
bool dynamic_name;
void *drv_data;
/* These fields only added when supporting pinmux drivers */
#ifdef CONFIG_PINMUX
unsigned mux_usecount;
const char *mux_owner;
const struct pinctrl_setting_mux *mux_setting;
const char *gpio_owner;
#endif
};
/**
* struct pinctrl_maps - a list item containing part of the mapping table
* @node: mapping table list node
* @maps: array of mapping table entries
* @num_maps: the number of entries in @maps
*/
struct pinctrl_maps {
struct list_head node;
const struct pinctrl_map *maps;
unsigned num_maps;
};
#ifdef CONFIG_GENERIC_PINCTRL_GROUPS
/**
* struct group_desc - generic pin group descriptor
* @name: name of the pin group
* @pins: array of pins that belong to the group
* @num_pins: number of pins in the group
* @data: pin controller driver specific data
*/
struct group_desc {
const char *name;
int *pins;
int num_pins;
void *data;
};
int pinctrl_generic_get_group_count(struct pinctrl_dev *pctldev);
const char *pinctrl_generic_get_group_name(struct pinctrl_dev *pctldev,
unsigned int group_selector);
int pinctrl_generic_get_group_pins(struct pinctrl_dev *pctldev,
unsigned int group_selector,
const unsigned int **pins,
unsigned int *npins);
struct group_desc *pinctrl_generic_get_group(struct pinctrl_dev *pctldev,
unsigned int group_selector);
int pinctrl_generic_add_group(struct pinctrl_dev *pctldev, const char *name,
int *gpins, int ngpins, void *data);
int pinctrl_generic_remove_group(struct pinctrl_dev *pctldev,
unsigned int group_selector);
#endif /* CONFIG_GENERIC_PINCTRL_GROUPS */
struct pinctrl_dev *get_pinctrl_dev_from_devname(const char *dev_name);
struct pinctrl_dev *get_pinctrl_dev_from_of_node(struct device_node *np);
int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name);
const char *pin_get_name(struct pinctrl_dev *pctldev, const unsigned pin);
int pinctrl_get_group_selector(struct pinctrl_dev *pctldev,
const char *pin_group);
static inline struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev,
unsigned int pin)
{
return radix_tree_lookup(&pctldev->pin_desc_tree, pin);
}
extern struct pinctrl_gpio_range *
pinctrl_find_gpio_range_from_pin_nolock(struct pinctrl_dev *pctldev,
unsigned int pin);
extern int pinctrl_force_sleep(struct pinctrl_dev *pctldev);
extern int pinctrl_force_default(struct pinctrl_dev *pctldev);
extern struct mutex pinctrl_maps_mutex;
extern struct list_head pinctrl_maps;
#define for_each_maps(_maps_node_, _i_, _map_) \
list_for_each_entry(_maps_node_, &pinctrl_maps, node) \
for (_i_ = 0, _map_ = &_maps_node_->maps[_i_]; \
_i_ < _maps_node_->num_maps; \
_i_++, _map_ = &_maps_node_->maps[_i_])

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include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
PKG_NAME:=rtc-pcf85063
PKG_RELEASE:=1
include $(INCLUDE_DIR)/package.mk
define KernelPackage/$(PKG_NAME)
SUBMENU:=Other modules
TITLE:=Philips PCF85063 RTC support
DEPENDS:=+kmod-i2c-core +kmod-regmap-i2c
AUTOLOAD:=$(call AutoProbe,rtc-pcf85063)
FILES:=$(PKG_BUILD_DIR)/rtc-pcf85063.ko
KCONFIG:=
endef
define KernelPackage/$(PKG_NAME)/description
Kernel module for Philips PCF85063 RTC chip.
endef
EXTRA_KCONFIG:= \
CONFIG_RTC_DRV_PCF85063=m \
CONFIG_RTC_CLASS=y
EXTRA_CFLAGS:= \
$(patsubst CONFIG_%, -DCONFIG_%=1, $(patsubst %=m,%,$(filter %=m,$(EXTRA_KCONFIG)))) \
$(patsubst CONFIG_%, -DCONFIG_%=1, $(patsubst %=y,%,$(filter %=y,$(EXTRA_KCONFIG)))) \
MAKE_OPTS:= \
$(KERNEL_MAKE_FLAGS) \
M="$(PKG_BUILD_DIR)" \
EXTRA_CFLAGS="$(EXTRA_CFLAGS)" \
$(EXTRA_KCONFIG)
define Build/Compile
$(MAKE) -C "$(LINUX_DIR)" \
$(MAKE_OPTS) \
modules
endef
$(eval $(call KernelPackage,$(PKG_NAME)))

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# SPDX-License-Identifier: GPL-2.0
#
# Makefile for RTC class/drivers.
#
ccflags-$(CONFIG_RTC_DEBUG) := -DDEBUG
obj-$(CONFIG_RTC_DRV_PCF85063) += rtc-pcf85063.o

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// SPDX-License-Identifier: GPL-2.0
/*
* An I2C driver for the PCF85063 RTC
* Copyright 2014 Rose Technology
*
* Author: Søren Andersen <san@rosetechnology.dk>
* Maintainers: http://www.nslu2-linux.org/
*
* Copyright (C) 2019 Micro Crystal AG
* Author: Alexandre Belloni <alexandre.belloni@bootlin.com>
*/
#include <linux/clk-provider.h>
#include <linux/i2c.h>
#include <linux/bcd.h>
#include <linux/rtc.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/pm_wakeirq.h>
#include <linux/regmap.h>
/*
* Information for this driver was pulled from the following datasheets.
*
* https://www.nxp.com/documents/data_sheet/PCF85063A.pdf
* https://www.nxp.com/documents/data_sheet/PCF85063TP.pdf
*
* PCF85063A -- Rev. 6 — 18 November 2015
* PCF85063TP -- Rev. 4 — 6 May 2015
*
* https://www.microcrystal.com/fileadmin/Media/Products/RTC/App.Manual/RV-8263-C7_App-Manual.pdf
* RV8263 -- Rev. 1.0 — January 2019
*/
#define PCF85063_REG_CTRL1 0x00 /* status */
#define PCF85063_REG_CTRL1_CAP_SEL BIT(0)
#define PCF85063_REG_CTRL1_STOP BIT(5)
#define PCF85063_REG_CTRL2 0x01
#define PCF85063_CTRL2_AF BIT(6)
#define PCF85063_CTRL2_AIE BIT(7)
#define PCF85063_REG_OFFSET 0x02
#define PCF85063_OFFSET_SIGN_BIT 6 /* 2's complement sign bit */
#define PCF85063_OFFSET_MODE BIT(7)
#define PCF85063_OFFSET_STEP0 4340
#define PCF85063_OFFSET_STEP1 4069
#define PCF85063_REG_CLKO_F_MASK 0x07 /* frequency mask */
#define PCF85063_REG_CLKO_F_32768HZ 0x00
#define PCF85063_REG_CLKO_F_OFF 0x07
#define PCF85063_REG_RAM 0x03
#define PCF85063_REG_SC 0x04 /* datetime */
#define PCF85063_REG_SC_OS 0x80
#define PCF85063_REG_ALM_S 0x0b
#define PCF85063_AEN BIT(7)
struct pcf85063_config {
struct regmap_config regmap;
unsigned has_alarms:1;
unsigned force_cap_7000:1;
};
struct pcf85063 {
struct rtc_device *rtc;
struct regmap *regmap;
#ifdef CONFIG_COMMON_CLK
struct clk_hw clkout_hw;
#endif
};
static int pcf85063_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
struct pcf85063 *pcf85063 = dev_get_drvdata(dev);
int rc;
u8 regs[7];
/*
* while reading, the time/date registers are blocked and not updated
* anymore until the access is finished. To not lose a second
* event, the access must be finished within one second. So, read all
* time/date registers in one turn.
*/
rc = regmap_bulk_read(pcf85063->regmap, PCF85063_REG_SC, regs,
sizeof(regs));
if (rc)
return rc;
/* if the clock has lost its power it makes no sense to use its time */
if (regs[0] & PCF85063_REG_SC_OS) {
dev_warn(&pcf85063->rtc->dev, "Power loss detected, invalid time\n");
return -EINVAL;
}
tm->tm_sec = bcd2bin(regs[0] & 0x7F);
tm->tm_min = bcd2bin(regs[1] & 0x7F);
tm->tm_hour = bcd2bin(regs[2] & 0x3F); /* rtc hr 0-23 */
tm->tm_mday = bcd2bin(regs[3] & 0x3F);
tm->tm_wday = regs[4] & 0x07;
tm->tm_mon = bcd2bin(regs[5] & 0x1F) - 1; /* rtc mn 1-12 */
tm->tm_year = bcd2bin(regs[6]);
tm->tm_year += 100;
return 0;
}
static int pcf85063_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct pcf85063 *pcf85063 = dev_get_drvdata(dev);
int rc;
u8 regs[7];
/*
* to accurately set the time, reset the divider chain and keep it in
* reset state until all time/date registers are written
*/
rc = regmap_update_bits(pcf85063->regmap, PCF85063_REG_CTRL1,
PCF85063_REG_CTRL1_STOP,
PCF85063_REG_CTRL1_STOP);
if (rc)
return rc;
/* hours, minutes and seconds */
regs[0] = bin2bcd(tm->tm_sec) & 0x7F; /* clear OS flag */
regs[1] = bin2bcd(tm->tm_min);
regs[2] = bin2bcd(tm->tm_hour);
/* Day of month, 1 - 31 */
regs[3] = bin2bcd(tm->tm_mday);
/* Day, 0 - 6 */
regs[4] = tm->tm_wday & 0x07;
/* month, 1 - 12 */
regs[5] = bin2bcd(tm->tm_mon + 1);
/* year and century */
regs[6] = bin2bcd(tm->tm_year - 100);
/* write all registers at once */
rc = regmap_bulk_write(pcf85063->regmap, PCF85063_REG_SC,
regs, sizeof(regs));
if (rc)
return rc;
/*
* Write the control register as a separate action since the size of
* the register space is different between the PCF85063TP and
* PCF85063A devices. The rollover point can not be used.
*/
return regmap_update_bits(pcf85063->regmap, PCF85063_REG_CTRL1,
PCF85063_REG_CTRL1_STOP, 0);
}
static int pcf85063_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct pcf85063 *pcf85063 = dev_get_drvdata(dev);
u8 buf[4];
unsigned int val;
int ret;
ret = regmap_bulk_read(pcf85063->regmap, PCF85063_REG_ALM_S,
buf, sizeof(buf));
if (ret)
return ret;
alrm->time.tm_sec = bcd2bin(buf[0]);
alrm->time.tm_min = bcd2bin(buf[1]);
alrm->time.tm_hour = bcd2bin(buf[2]);
alrm->time.tm_mday = bcd2bin(buf[3]);
ret = regmap_read(pcf85063->regmap, PCF85063_REG_CTRL2, &val);
if (ret)
return ret;
alrm->enabled = !!(val & PCF85063_CTRL2_AIE);
return 0;
}
static int pcf85063_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct pcf85063 *pcf85063 = dev_get_drvdata(dev);
u8 buf[5];
int ret;
buf[0] = bin2bcd(alrm->time.tm_sec);
buf[1] = bin2bcd(alrm->time.tm_min);
buf[2] = bin2bcd(alrm->time.tm_hour);
buf[3] = bin2bcd(alrm->time.tm_mday);
buf[4] = PCF85063_AEN; /* Do not match on week day */
ret = regmap_update_bits(pcf85063->regmap, PCF85063_REG_CTRL2,
PCF85063_CTRL2_AIE | PCF85063_CTRL2_AF, 0);
if (ret)
return ret;
ret = regmap_bulk_write(pcf85063->regmap, PCF85063_REG_ALM_S,
buf, sizeof(buf));
if (ret)
return ret;
return regmap_update_bits(pcf85063->regmap, PCF85063_REG_CTRL2,
PCF85063_CTRL2_AIE | PCF85063_CTRL2_AF,
alrm->enabled ? PCF85063_CTRL2_AIE | PCF85063_CTRL2_AF : PCF85063_CTRL2_AF);
}
static int pcf85063_rtc_alarm_irq_enable(struct device *dev,
unsigned int enabled)
{
struct pcf85063 *pcf85063 = dev_get_drvdata(dev);
return regmap_update_bits(pcf85063->regmap, PCF85063_REG_CTRL2,
PCF85063_CTRL2_AIE,
enabled ? PCF85063_CTRL2_AIE : 0);
}
static irqreturn_t pcf85063_rtc_handle_irq(int irq, void *dev_id)
{
struct pcf85063 *pcf85063 = dev_id;
unsigned int val;
int err;
err = regmap_read(pcf85063->regmap, PCF85063_REG_CTRL2, &val);
if (err)
return IRQ_NONE;
if (val & PCF85063_CTRL2_AF) {
rtc_update_irq(pcf85063->rtc, 1, RTC_IRQF | RTC_AF);
regmap_update_bits(pcf85063->regmap, PCF85063_REG_CTRL2,
PCF85063_CTRL2_AIE | PCF85063_CTRL2_AF,
0);
return IRQ_HANDLED;
}
return IRQ_NONE;
}
static int pcf85063_read_offset(struct device *dev, long *offset)
{
struct pcf85063 *pcf85063 = dev_get_drvdata(dev);
long val;
u32 reg;
int ret;
ret = regmap_read(pcf85063->regmap, PCF85063_REG_OFFSET, &reg);
if (ret < 0)
return ret;
val = sign_extend32(reg & ~PCF85063_OFFSET_MODE,
PCF85063_OFFSET_SIGN_BIT);
if (reg & PCF85063_OFFSET_MODE)
*offset = val * PCF85063_OFFSET_STEP1;
else
*offset = val * PCF85063_OFFSET_STEP0;
return 0;
}
static int pcf85063_set_offset(struct device *dev, long offset)
{
struct pcf85063 *pcf85063 = dev_get_drvdata(dev);
s8 mode0, mode1, reg;
unsigned int error0, error1;
if (offset > PCF85063_OFFSET_STEP0 * 63)
return -ERANGE;
if (offset < PCF85063_OFFSET_STEP0 * -64)
return -ERANGE;
mode0 = DIV_ROUND_CLOSEST(offset, PCF85063_OFFSET_STEP0);
mode1 = DIV_ROUND_CLOSEST(offset, PCF85063_OFFSET_STEP1);
error0 = abs(offset - (mode0 * PCF85063_OFFSET_STEP0));
error1 = abs(offset - (mode1 * PCF85063_OFFSET_STEP1));
if (mode1 > 63 || mode1 < -64 || error0 < error1)
reg = mode0 & ~PCF85063_OFFSET_MODE;
else
reg = mode1 | PCF85063_OFFSET_MODE;
return regmap_write(pcf85063->regmap, PCF85063_REG_OFFSET, reg);
}
static int pcf85063_ioctl(struct device *dev, unsigned int cmd,
unsigned long arg)
{
struct pcf85063 *pcf85063 = dev_get_drvdata(dev);
int status, ret = 0;
switch (cmd) {
case RTC_VL_READ:
ret = regmap_read(pcf85063->regmap, PCF85063_REG_SC, &status);
if (ret < 0)
return ret;
status = status & PCF85063_REG_SC_OS ? RTC_VL_DATA_INVALID : 0;
return put_user(status, (unsigned int __user *)arg);
default:
return -ENOIOCTLCMD;
}
}
static const struct rtc_class_ops pcf85063_rtc_ops = {
.read_time = pcf85063_rtc_read_time,
.set_time = pcf85063_rtc_set_time,
.read_offset = pcf85063_read_offset,
.set_offset = pcf85063_set_offset,
.ioctl = pcf85063_ioctl,
};
static const struct rtc_class_ops pcf85063_rtc_ops_alarm = {
.read_time = pcf85063_rtc_read_time,
.set_time = pcf85063_rtc_set_time,
.read_offset = pcf85063_read_offset,
.set_offset = pcf85063_set_offset,
.read_alarm = pcf85063_rtc_read_alarm,
.set_alarm = pcf85063_rtc_set_alarm,
.alarm_irq_enable = pcf85063_rtc_alarm_irq_enable,
.ioctl = pcf85063_ioctl,
};
static int pcf85063_nvmem_read(void *priv, unsigned int offset,
void *val, size_t bytes)
{
return regmap_read(priv, PCF85063_REG_RAM, val);
}
static int pcf85063_nvmem_write(void *priv, unsigned int offset,
void *val, size_t bytes)
{
return regmap_write(priv, PCF85063_REG_RAM, *(u8 *)val);
}
static int pcf85063_load_capacitance(struct pcf85063 *pcf85063,
const struct device_node *np,
unsigned int force_cap)
{
u32 load = 7000;
u8 reg = 0;
if (force_cap)
load = force_cap;
else
of_property_read_u32(np, "quartz-load-femtofarads", &load);
switch (load) {
default:
dev_warn(&pcf85063->rtc->dev, "Unknown quartz-load-femtofarads value: %d. Assuming 7000",
load);
fallthrough;
case 7000:
break;
case 12500:
reg = PCF85063_REG_CTRL1_CAP_SEL;
break;
}
return regmap_update_bits(pcf85063->regmap, PCF85063_REG_CTRL1,
PCF85063_REG_CTRL1_CAP_SEL, reg);
}
#ifdef CONFIG_COMMON_CLK
/*
* Handling of the clkout
*/
#define clkout_hw_to_pcf85063(_hw) container_of(_hw, struct pcf85063, clkout_hw)
static int clkout_rates[] = {
32768,
16384,
8192,
4096,
2048,
1024,
1,
0
};
static unsigned long pcf85063_clkout_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct pcf85063 *pcf85063 = clkout_hw_to_pcf85063(hw);
unsigned int buf;
int ret = regmap_read(pcf85063->regmap, PCF85063_REG_CTRL2, &buf);
if (ret < 0)
return 0;
buf &= PCF85063_REG_CLKO_F_MASK;
return clkout_rates[buf];
}
static long pcf85063_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
int i;
for (i = 0; i < ARRAY_SIZE(clkout_rates); i++)
if (clkout_rates[i] <= rate)
return clkout_rates[i];
return 0;
}
static int pcf85063_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct pcf85063 *pcf85063 = clkout_hw_to_pcf85063(hw);
int i;
for (i = 0; i < ARRAY_SIZE(clkout_rates); i++)
if (clkout_rates[i] == rate)
return regmap_update_bits(pcf85063->regmap,
PCF85063_REG_CTRL2,
PCF85063_REG_CLKO_F_MASK, i);
return -EINVAL;
}
static int pcf85063_clkout_control(struct clk_hw *hw, bool enable)
{
struct pcf85063 *pcf85063 = clkout_hw_to_pcf85063(hw);
unsigned int buf;
int ret;
ret = regmap_read(pcf85063->regmap, PCF85063_REG_OFFSET, &buf);
if (ret < 0)
return ret;
buf &= PCF85063_REG_CLKO_F_MASK;
if (enable) {
if (buf == PCF85063_REG_CLKO_F_OFF)
buf = PCF85063_REG_CLKO_F_32768HZ;
else
return 0;
} else {
if (buf != PCF85063_REG_CLKO_F_OFF)
buf = PCF85063_REG_CLKO_F_OFF;
else
return 0;
}
return regmap_update_bits(pcf85063->regmap, PCF85063_REG_CTRL2,
PCF85063_REG_CLKO_F_MASK, buf);
}
static int pcf85063_clkout_prepare(struct clk_hw *hw)
{
return pcf85063_clkout_control(hw, 1);
}
static void pcf85063_clkout_unprepare(struct clk_hw *hw)
{
pcf85063_clkout_control(hw, 0);
}
static int pcf85063_clkout_is_prepared(struct clk_hw *hw)
{
struct pcf85063 *pcf85063 = clkout_hw_to_pcf85063(hw);
unsigned int buf;
int ret = regmap_read(pcf85063->regmap, PCF85063_REG_CTRL2, &buf);
if (ret < 0)
return 0;
return (buf & PCF85063_REG_CLKO_F_MASK) != PCF85063_REG_CLKO_F_OFF;
}
static const struct clk_ops pcf85063_clkout_ops = {
.prepare = pcf85063_clkout_prepare,
.unprepare = pcf85063_clkout_unprepare,
.is_prepared = pcf85063_clkout_is_prepared,
.recalc_rate = pcf85063_clkout_recalc_rate,
.round_rate = pcf85063_clkout_round_rate,
.set_rate = pcf85063_clkout_set_rate,
};
static struct clk *pcf85063_clkout_register_clk(struct pcf85063 *pcf85063)
{
struct clk *clk;
struct clk_init_data init;
struct device_node *node = pcf85063->rtc->dev.parent->of_node;
init.name = "pcf85063-clkout";
init.ops = &pcf85063_clkout_ops;
init.flags = 0;
init.parent_names = NULL;
init.num_parents = 0;
pcf85063->clkout_hw.init = &init;
/* optional override of the clockname */
of_property_read_string(node, "clock-output-names", &init.name);
/* register the clock */
clk = devm_clk_register(&pcf85063->rtc->dev, &pcf85063->clkout_hw);
if (!IS_ERR(clk))
of_clk_add_provider(node, of_clk_src_simple_get, clk);
return clk;
}
#endif
static const struct pcf85063_config pcf85063a_config = {
.regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x11,
},
.has_alarms = 1,
};
static const struct pcf85063_config pcf85063tp_config = {
.regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x0a,
},
};
static const struct pcf85063_config rv8263_config = {
.regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x11,
},
.has_alarms = 1,
.force_cap_7000 = 1,
};
static int pcf85063_probe(struct i2c_client *client)
{
struct pcf85063 *pcf85063;
unsigned int tmp;
int err;
const struct pcf85063_config *config = &pcf85063tp_config;
const void *data = of_device_get_match_data(&client->dev);
struct nvmem_config nvmem_cfg = {
.name = "pcf85063_nvram",
.reg_read = pcf85063_nvmem_read,
.reg_write = pcf85063_nvmem_write,
.type = NVMEM_TYPE_BATTERY_BACKED,
.size = 1,
};
dev_dbg(&client->dev, "%s\n", __func__);
pcf85063 = devm_kzalloc(&client->dev, sizeof(struct pcf85063),
GFP_KERNEL);
if (!pcf85063)
return -ENOMEM;
if (data)
config = data;
pcf85063->regmap = devm_regmap_init_i2c(client, &config->regmap);
if (IS_ERR(pcf85063->regmap))
return PTR_ERR(pcf85063->regmap);
i2c_set_clientdata(client, pcf85063);
err = regmap_read(pcf85063->regmap, PCF85063_REG_CTRL1, &tmp);
if (err) {
dev_err(&client->dev, "RTC chip is not present\n");
return err;
}
pcf85063->rtc = devm_rtc_allocate_device(&client->dev);
if (IS_ERR(pcf85063->rtc))
return PTR_ERR(pcf85063->rtc);
err = pcf85063_load_capacitance(pcf85063, client->dev.of_node,
config->force_cap_7000 ? 7000 : 0);
if (err < 0)
dev_warn(&client->dev, "failed to set xtal load capacitance: %d",
err);
pcf85063->rtc->ops = &pcf85063_rtc_ops;
pcf85063->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
pcf85063->rtc->range_max = RTC_TIMESTAMP_END_2099;
pcf85063->rtc->uie_unsupported = 1;
if (config->has_alarms && client->irq > 0) {
err = devm_request_threaded_irq(&client->dev, client->irq,
NULL, pcf85063_rtc_handle_irq,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"pcf85063", pcf85063);
if (err) {
dev_warn(&pcf85063->rtc->dev,
"unable to request IRQ, alarms disabled\n");
} else {
pcf85063->rtc->ops = &pcf85063_rtc_ops_alarm;
device_init_wakeup(&client->dev, true);
err = dev_pm_set_wake_irq(&client->dev, client->irq);
if (err)
dev_err(&pcf85063->rtc->dev,
"failed to enable irq wake\n");
}
}
nvmem_cfg.priv = pcf85063->regmap;
rtc_nvmem_register(pcf85063->rtc, &nvmem_cfg);
#ifdef CONFIG_COMMON_CLK
/* register clk in common clk framework */
pcf85063_clkout_register_clk(pcf85063);
#endif
return rtc_register_device(pcf85063->rtc);
}
#ifdef CONFIG_OF
static const struct of_device_id pcf85063_of_match[] = {
{ .compatible = "nxp,pcf85063", .data = &pcf85063tp_config },
{ .compatible = "nxp,pcf85063tp", .data = &pcf85063tp_config },
{ .compatible = "nxp,pcf85063a", .data = &pcf85063a_config },
{ .compatible = "microcrystal,rv8263", .data = &rv8263_config },
{}
};
MODULE_DEVICE_TABLE(of, pcf85063_of_match);
#endif
static struct i2c_driver pcf85063_driver = {
.driver = {
.name = "rtc-pcf85063",
.of_match_table = of_match_ptr(pcf85063_of_match),
},
.probe_new = pcf85063_probe,
};
module_i2c_driver(pcf85063_driver);
MODULE_AUTHOR("Søren Andersen <san@rosetechnology.dk>");
MODULE_DESCRIPTION("PCF85063 RTC driver");
MODULE_LICENSE("GPL");