linux/drivers/bus/ts-nbus.c

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/*
* NBUS driver for TS-4600 based boards
*
* Copyright (c) 2016 - Savoir-faire Linux
* Author: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*
* This driver implements a GPIOs bit-banged bus, called the NBUS by Technologic
* Systems. It is used to communicate with the peripherals in the FPGA on the
* TS-4600 SoM.
*/
#include <linux/bitops.h>
#include <linux/gpio/consumer.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pwm.h>
#include <linux/ts-nbus.h>
#define TS_NBUS_DIRECTION_IN 0
#define TS_NBUS_DIRECTION_OUT 1
#define TS_NBUS_WRITE_ADR 0
#define TS_NBUS_WRITE_VAL 1
struct ts_nbus {
struct pwm_device *pwm;
struct gpio_descs *data;
struct gpio_desc *csn;
struct gpio_desc *txrx;
struct gpio_desc *strobe;
struct gpio_desc *ale;
struct gpio_desc *rdy;
struct mutex lock;
};
/*
* request all gpios required by the bus.
*/
static int ts_nbus_init_pdata(struct platform_device *pdev, struct ts_nbus
*ts_nbus)
{
ts_nbus->data = devm_gpiod_get_array(&pdev->dev, "ts,data",
GPIOD_OUT_HIGH);
if (IS_ERR(ts_nbus->data)) {
dev_err(&pdev->dev, "failed to retrieve ts,data-gpio from dts\n");
return PTR_ERR(ts_nbus->data);
}
ts_nbus->csn = devm_gpiod_get(&pdev->dev, "ts,csn", GPIOD_OUT_HIGH);
if (IS_ERR(ts_nbus->csn)) {
dev_err(&pdev->dev, "failed to retrieve ts,csn-gpio from dts\n");
return PTR_ERR(ts_nbus->csn);
}
ts_nbus->txrx = devm_gpiod_get(&pdev->dev, "ts,txrx", GPIOD_OUT_HIGH);
if (IS_ERR(ts_nbus->txrx)) {
dev_err(&pdev->dev, "failed to retrieve ts,txrx-gpio from dts\n");
return PTR_ERR(ts_nbus->txrx);
}
ts_nbus->strobe = devm_gpiod_get(&pdev->dev, "ts,strobe", GPIOD_OUT_HIGH);
if (IS_ERR(ts_nbus->strobe)) {
dev_err(&pdev->dev, "failed to retrieve ts,strobe-gpio from dts\n");
return PTR_ERR(ts_nbus->strobe);
}
ts_nbus->ale = devm_gpiod_get(&pdev->dev, "ts,ale", GPIOD_OUT_HIGH);
if (IS_ERR(ts_nbus->ale)) {
dev_err(&pdev->dev, "failed to retrieve ts,ale-gpio from dts\n");
return PTR_ERR(ts_nbus->ale);
}
ts_nbus->rdy = devm_gpiod_get(&pdev->dev, "ts,rdy", GPIOD_IN);
if (IS_ERR(ts_nbus->rdy)) {
dev_err(&pdev->dev, "failed to retrieve ts,rdy-gpio from dts\n");
return PTR_ERR(ts_nbus->rdy);
}
return 0;
}
/*
* the data gpios are used for reading and writing values, their directions
* should be adjusted accordingly.
*/
static void ts_nbus_set_direction(struct ts_nbus *ts_nbus, int direction)
{
int i;
for (i = 0; i < 8; i++) {
if (direction == TS_NBUS_DIRECTION_IN)
gpiod_direction_input(ts_nbus->data->desc[i]);
else
/* when used as output the default state of the data
* lines are set to high */
gpiod_direction_output(ts_nbus->data->desc[i], 1);
}
}
/*
* reset the bus in its initial state.
* The data, csn, strobe and ale lines must be zero'ed to let the FPGA knows a
* new transaction can be process.
*/
static void ts_nbus_reset_bus(struct ts_nbus *ts_nbus)
{
gpiolib: Pass bitmaps, not integer arrays, to get/set array Most users of get/set array functions iterate consecutive bits of data, usually a single integer, while processing array of results obtained from, or building an array of values to be passed to those functions. Save time wasted on those iterations by changing the functions' API to accept bitmaps. All current users are updated as well. More benefits from the change are expected as soon as planned support for accepting/passing those bitmaps directly from/to respective GPIO chip callbacks if applicable is implemented. Cc: Jonathan Corbet <corbet@lwn.net> Cc: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com> Cc: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com> Cc: Lukas Wunner <lukas@wunner.de> Cc: Peter Korsgaard <peter.korsgaard@barco.com> Cc: Peter Rosin <peda@axentia.se> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Rojhalat Ibrahim <imr@rtschenk.de> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Michael Hennerich <Michael.Hennerich@analog.com> Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.com> Cc: Yegor Yefremov <yegorslists@googlemail.com> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-09-05 21:50:05 +00:00
DECLARE_BITMAP(values, 8);
gpiolib: Pass bitmaps, not integer arrays, to get/set array Most users of get/set array functions iterate consecutive bits of data, usually a single integer, while processing array of results obtained from, or building an array of values to be passed to those functions. Save time wasted on those iterations by changing the functions' API to accept bitmaps. All current users are updated as well. More benefits from the change are expected as soon as planned support for accepting/passing those bitmaps directly from/to respective GPIO chip callbacks if applicable is implemented. Cc: Jonathan Corbet <corbet@lwn.net> Cc: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com> Cc: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com> Cc: Lukas Wunner <lukas@wunner.de> Cc: Peter Korsgaard <peter.korsgaard@barco.com> Cc: Peter Rosin <peda@axentia.se> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Rojhalat Ibrahim <imr@rtschenk.de> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Michael Hennerich <Michael.Hennerich@analog.com> Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.com> Cc: Yegor Yefremov <yegorslists@googlemail.com> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-09-05 21:50:05 +00:00
values[0] = 0;
gpiolib: Pass array info to get/set array functions In order to make use of array info obtained from gpiod_get_array() and speed up processing of arrays matching single GPIO chip layout, that information must be passed to get/set array functions. Extend the functions' API with that additional parameter and update all users. Pass NULL if a user builds an array itself from single GPIOs. Cc: Jonathan Corbet <corbet@lwn.net> Cc: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com> Cc: Lukas Wunner <lukas@wunner.de> Cc: Peter Korsgaard <peter.korsgaard@barco.com> Cc: Peter Rosin <peda@axentia.se> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Rojhalat Ibrahim <imr@rtschenk.de> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Michael Hennerich <Michael.Hennerich@analog.com> Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.com> Cc: Yegor Yefremov <yegorslists@googlemail.com> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-09-05 21:50:07 +00:00
gpiod_set_array_value_cansleep(8, ts_nbus->data->desc,
ts_nbus->data->info, values);
gpiod_set_value_cansleep(ts_nbus->csn, 0);
gpiod_set_value_cansleep(ts_nbus->strobe, 0);
gpiod_set_value_cansleep(ts_nbus->ale, 0);
}
/*
* let the FPGA knows it can process.
*/
static void ts_nbus_start_transaction(struct ts_nbus *ts_nbus)
{
gpiod_set_value_cansleep(ts_nbus->strobe, 1);
}
/*
* read a byte value from the data gpios.
* return 0 on success or negative errno on failure.
*/
static int ts_nbus_read_byte(struct ts_nbus *ts_nbus, u8 *val)
{
struct gpio_descs *gpios = ts_nbus->data;
int ret, i;
*val = 0;
for (i = 0; i < 8; i++) {
ret = gpiod_get_value_cansleep(gpios->desc[i]);
if (ret < 0)
return ret;
if (ret)
*val |= BIT(i);
}
return 0;
}
/*
* set the data gpios accordingly to the byte value.
*/
static void ts_nbus_write_byte(struct ts_nbus *ts_nbus, u8 byte)
{
struct gpio_descs *gpios = ts_nbus->data;
gpiolib: Pass bitmaps, not integer arrays, to get/set array Most users of get/set array functions iterate consecutive bits of data, usually a single integer, while processing array of results obtained from, or building an array of values to be passed to those functions. Save time wasted on those iterations by changing the functions' API to accept bitmaps. All current users are updated as well. More benefits from the change are expected as soon as planned support for accepting/passing those bitmaps directly from/to respective GPIO chip callbacks if applicable is implemented. Cc: Jonathan Corbet <corbet@lwn.net> Cc: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com> Cc: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com> Cc: Lukas Wunner <lukas@wunner.de> Cc: Peter Korsgaard <peter.korsgaard@barco.com> Cc: Peter Rosin <peda@axentia.se> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Rojhalat Ibrahim <imr@rtschenk.de> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Michael Hennerich <Michael.Hennerich@analog.com> Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.com> Cc: Yegor Yefremov <yegorslists@googlemail.com> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-09-05 21:50:05 +00:00
DECLARE_BITMAP(values, 8);
gpiolib: Pass bitmaps, not integer arrays, to get/set array Most users of get/set array functions iterate consecutive bits of data, usually a single integer, while processing array of results obtained from, or building an array of values to be passed to those functions. Save time wasted on those iterations by changing the functions' API to accept bitmaps. All current users are updated as well. More benefits from the change are expected as soon as planned support for accepting/passing those bitmaps directly from/to respective GPIO chip callbacks if applicable is implemented. Cc: Jonathan Corbet <corbet@lwn.net> Cc: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com> Cc: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com> Cc: Lukas Wunner <lukas@wunner.de> Cc: Peter Korsgaard <peter.korsgaard@barco.com> Cc: Peter Rosin <peda@axentia.se> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Rojhalat Ibrahim <imr@rtschenk.de> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Michael Hennerich <Michael.Hennerich@analog.com> Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.com> Cc: Yegor Yefremov <yegorslists@googlemail.com> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-09-05 21:50:05 +00:00
values[0] = byte;
gpiolib: Pass array info to get/set array functions In order to make use of array info obtained from gpiod_get_array() and speed up processing of arrays matching single GPIO chip layout, that information must be passed to get/set array functions. Extend the functions' API with that additional parameter and update all users. Pass NULL if a user builds an array itself from single GPIOs. Cc: Jonathan Corbet <corbet@lwn.net> Cc: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com> Cc: Lukas Wunner <lukas@wunner.de> Cc: Peter Korsgaard <peter.korsgaard@barco.com> Cc: Peter Rosin <peda@axentia.se> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Rojhalat Ibrahim <imr@rtschenk.de> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Michael Hennerich <Michael.Hennerich@analog.com> Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.com> Cc: Yegor Yefremov <yegorslists@googlemail.com> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-09-05 21:50:07 +00:00
gpiod_set_array_value_cansleep(8, gpios->desc, gpios->info, values);
}
/*
* reading the bus consists of resetting the bus, then notifying the FPGA to
* send the data in the data gpios and return the read value.
* return 0 on success or negative errno on failure.
*/
static int ts_nbus_read_bus(struct ts_nbus *ts_nbus, u8 *val)
{
ts_nbus_reset_bus(ts_nbus);
ts_nbus_start_transaction(ts_nbus);
return ts_nbus_read_byte(ts_nbus, val);
}
/*
* writing to the bus consists of resetting the bus, then define the type of
* command (address/value), write the data and notify the FPGA to retrieve the
* value in the data gpios.
*/
static void ts_nbus_write_bus(struct ts_nbus *ts_nbus, int cmd, u8 val)
{
ts_nbus_reset_bus(ts_nbus);
if (cmd == TS_NBUS_WRITE_ADR)
gpiod_set_value_cansleep(ts_nbus->ale, 1);
ts_nbus_write_byte(ts_nbus, val);
ts_nbus_start_transaction(ts_nbus);
}
/*
* read the value in the FPGA register at the given address.
* return 0 on success or negative errno on failure.
*/
int ts_nbus_read(struct ts_nbus *ts_nbus, u8 adr, u16 *val)
{
int ret, i;
u8 byte;
/* bus access must be atomic */
mutex_lock(&ts_nbus->lock);
/* set the bus in read mode */
gpiod_set_value_cansleep(ts_nbus->txrx, 0);
/* write address */
ts_nbus_write_bus(ts_nbus, TS_NBUS_WRITE_ADR, adr);
/* set the data gpios direction as input before reading */
ts_nbus_set_direction(ts_nbus, TS_NBUS_DIRECTION_IN);
/* reading value MSB first */
do {
*val = 0;
byte = 0;
for (i = 1; i >= 0; i--) {
/* read a byte from the bus, leave on error */
ret = ts_nbus_read_bus(ts_nbus, &byte);
if (ret < 0)
goto err;
/* append the byte read to the final value */
*val |= byte << (i * 8);
}
gpiod_set_value_cansleep(ts_nbus->csn, 1);
ret = gpiod_get_value_cansleep(ts_nbus->rdy);
} while (ret);
err:
/* restore the data gpios direction as output after reading */
ts_nbus_set_direction(ts_nbus, TS_NBUS_DIRECTION_OUT);
mutex_unlock(&ts_nbus->lock);
return ret;
}
EXPORT_SYMBOL_GPL(ts_nbus_read);
/*
* write the desired value in the FPGA register at the given address.
*/
int ts_nbus_write(struct ts_nbus *ts_nbus, u8 adr, u16 val)
{
int i;
/* bus access must be atomic */
mutex_lock(&ts_nbus->lock);
/* set the bus in write mode */
gpiod_set_value_cansleep(ts_nbus->txrx, 1);
/* write address */
ts_nbus_write_bus(ts_nbus, TS_NBUS_WRITE_ADR, adr);
/* writing value MSB first */
for (i = 1; i >= 0; i--)
ts_nbus_write_bus(ts_nbus, TS_NBUS_WRITE_VAL, (u8)(val >> (i * 8)));
/* wait for completion */
gpiod_set_value_cansleep(ts_nbus->csn, 1);
while (gpiod_get_value_cansleep(ts_nbus->rdy) != 0) {
gpiod_set_value_cansleep(ts_nbus->csn, 0);
gpiod_set_value_cansleep(ts_nbus->csn, 1);
}
mutex_unlock(&ts_nbus->lock);
return 0;
}
EXPORT_SYMBOL_GPL(ts_nbus_write);
static int ts_nbus_probe(struct platform_device *pdev)
{
struct pwm_device *pwm;
struct pwm_args pargs;
struct device *dev = &pdev->dev;
struct ts_nbus *ts_nbus;
int ret;
ts_nbus = devm_kzalloc(dev, sizeof(*ts_nbus), GFP_KERNEL);
if (!ts_nbus)
return -ENOMEM;
mutex_init(&ts_nbus->lock);
ret = ts_nbus_init_pdata(pdev, ts_nbus);
if (ret < 0)
return ret;
pwm = devm_pwm_get(dev, NULL);
if (IS_ERR(pwm)) {
ret = PTR_ERR(pwm);
if (ret != -EPROBE_DEFER)
dev_err(dev, "unable to request PWM\n");
return ret;
}
pwm_get_args(pwm, &pargs);
if (!pargs.period) {
dev_err(&pdev->dev, "invalid PWM period\n");
return -EINVAL;
}
/*
* FIXME: pwm_apply_args() should be removed when switching to
* the atomic PWM API.
*/
pwm_apply_args(pwm);
ret = pwm_config(pwm, pargs.period, pargs.period);
if (ret < 0)
return ret;
/*
* we can now start the FPGA and populate the peripherals.
*/
pwm_enable(pwm);
ts_nbus->pwm = pwm;
/*
* let the child nodes retrieve this instance of the ts-nbus.
*/
dev_set_drvdata(dev, ts_nbus);
ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
if (ret < 0)
return ret;
dev_info(dev, "initialized\n");
return 0;
}
static int ts_nbus_remove(struct platform_device *pdev)
{
struct ts_nbus *ts_nbus = dev_get_drvdata(&pdev->dev);
/* shutdown the FPGA */
mutex_lock(&ts_nbus->lock);
pwm_disable(ts_nbus->pwm);
mutex_unlock(&ts_nbus->lock);
return 0;
}
static const struct of_device_id ts_nbus_of_match[] = {
{ .compatible = "technologic,ts-nbus", },
{ },
};
MODULE_DEVICE_TABLE(of, ts_nbus_of_match);
static struct platform_driver ts_nbus_driver = {
.probe = ts_nbus_probe,
.remove = ts_nbus_remove,
.driver = {
.name = "ts_nbus",
.of_match_table = ts_nbus_of_match,
},
};
module_platform_driver(ts_nbus_driver);
MODULE_ALIAS("platform:ts_nbus");
MODULE_AUTHOR("Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com>");
MODULE_DESCRIPTION("Technologic Systems NBUS");
MODULE_LICENSE("GPL v2");