blob: 73800dd9001226dbf4d6565b9a799b642cf8d237 [file] [log] [blame]
/* Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/clk.h>
#include <linux/of_coresight.h>
#include <linux/coresight.h>
#include <linux/regulator/consumer.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <mach/gpiomux.h>
#include "coresight-priv.h"
#define tpiu_writel(drvdata, val, off) __raw_writel((val), drvdata->base + off)
#define tpiu_readl(drvdata, off) __raw_readl(drvdata->base + off)
#define TPIU_LOCK(drvdata) \
do { \
mb(); \
tpiu_writel(drvdata, 0x0, CORESIGHT_LAR); \
} while (0)
#define TPIU_UNLOCK(drvdata) \
do { \
tpiu_writel(drvdata, CORESIGHT_UNLOCK, CORESIGHT_LAR); \
mb(); \
} while (0)
#define TPIU_SUPP_PORTSZ (0x000)
#define TPIU_CURR_PORTSZ (0x004)
#define TPIU_SUPP_TRIGMODES (0x100)
#define TPIU_TRIG_CNTRVAL (0x104)
#define TPIU_TRIG_MULT (0x108)
#define TPIU_SUPP_TESTPATM (0x200)
#define TPIU_CURR_TESTPATM (0x204)
#define TPIU_TEST_PATREPCNTR (0x208)
#define TPIU_FFSR (0x300)
#define TPIU_FFCR (0x304)
#define TPIU_FSYNC_CNTR (0x308)
#define TPIU_EXTCTL_INPORT (0x400)
#define TPIU_EXTCTL_OUTPORT (0x404)
#define TPIU_ITTRFLINACK (0xEE4)
#define TPIU_ITTRFLIN (0xEE8)
#define TPIU_ITATBDATA0 (0xEEC)
#define TPIU_ITATBCTR2 (0xEF0)
#define TPIU_ITATBCTR1 (0xEF4)
#define TPIU_ITATBCTR0 (0xEF8)
enum tpiu_out_mode {
TPIU_OUT_MODE_NONE,
TPIU_OUT_MODE_MICTOR,
TPIU_OUT_MODE_SDC,
};
enum tpiu_set {
TPIU_SET_NONE,
TPIU_SET_A,
TPIU_SET_B,
};
struct tpiu_drvdata {
void __iomem *base;
struct device *dev;
struct coresight_device *csdev;
struct clk *clk;
struct mutex mutex;
enum tpiu_out_mode out_mode;
struct regulator *reg;
unsigned int reg_low;
unsigned int reg_high;
unsigned int reg_lpm;
unsigned int reg_hpm;
enum tpiu_set set;
unsigned int seta_gpiocnt;
unsigned int *seta_gpios;
struct gpiomux_setting *seta_cfgs;
unsigned int setb_gpiocnt;
unsigned int *setb_gpios;
struct gpiomux_setting *setb_cfgs;
bool enable;
};
struct gpiomux_setting old_cfg;
static void tpiu_flush_and_stop(struct tpiu_drvdata *drvdata)
{
int count;
uint32_t ffcr;
ffcr = tpiu_readl(drvdata, TPIU_FFCR);
ffcr |= BIT(12);
tpiu_writel(drvdata, ffcr, TPIU_FFCR);
ffcr |= BIT(6);
tpiu_writel(drvdata, ffcr, TPIU_FFCR);
/* Ensure flush completes */
for (count = TIMEOUT_US; BVAL(tpiu_readl(drvdata, TPIU_FFCR), 6) != 0
&& count > 0; count--)
udelay(1);
WARN(count == 0, "timeout while flushing TPIU, TPIU_FFCR: %#x\n",
tpiu_readl(drvdata, TPIU_FFCR));
}
static int __tpiu_enable_seta(struct tpiu_drvdata *drvdata)
{
int i, ret;
if (!drvdata->seta_gpiocnt)
return -EINVAL;
for (i = 0; i < drvdata->seta_gpiocnt; i++) {
ret = gpio_request(drvdata->seta_gpios[i], NULL);
if (ret) {
dev_err(drvdata->dev,
"gpio_request failed for seta_gpio: %u\n",
drvdata->seta_gpios[i]);
goto err0;
}
ret = msm_gpiomux_write(drvdata->seta_gpios[i],
GPIOMUX_ACTIVE,
&drvdata->seta_cfgs[i],
&old_cfg);
if (ret < 0) {
dev_err(drvdata->dev,
"gpio write failed for seta_gpio: %u\n",
drvdata->seta_gpios[i]);
goto err1;
}
}
return 0;
err1:
gpio_free(drvdata->seta_gpios[i]);
err0:
i--;
while (i >= 0) {
gpio_free(drvdata->seta_gpios[i]);
i--;
}
return ret;
}
static int __tpiu_enable_setb(struct tpiu_drvdata *drvdata)
{
int i, ret;
if (!drvdata->setb_gpiocnt)
return -EINVAL;
for (i = 0; i < drvdata->setb_gpiocnt; i++) {
ret = gpio_request(drvdata->setb_gpios[i], NULL);
if (ret) {
dev_err(drvdata->dev,
"gpio_request failed for setb_gpio: %u\n",
drvdata->setb_gpios[i]);
goto err0;
}
ret = msm_gpiomux_write(drvdata->setb_gpios[i],
GPIOMUX_ACTIVE,
&drvdata->setb_cfgs[i],
&old_cfg);
if (ret < 0) {
dev_err(drvdata->dev,
"gpio write failed for setb_gpio: %u\n",
drvdata->setb_gpios[i]);
goto err1;
}
}
return 0;
err1:
gpio_free(drvdata->setb_gpios[i]);
err0:
i--;
while (i >= 0) {
gpio_free(drvdata->setb_gpios[i]);
i--;
}
return ret;
}
static int __tpiu_enable_to_mictor(struct tpiu_drvdata *drvdata)
{
int ret;
if (drvdata->set == TPIU_SET_A) {
ret = __tpiu_enable_seta(drvdata);
if (ret)
return ret;
} else if (drvdata->set == TPIU_SET_B) {
ret = __tpiu_enable_setb(drvdata);
if (ret)
return ret;
}
TPIU_UNLOCK(drvdata);
tpiu_writel(drvdata, 0x8000, TPIU_CURR_PORTSZ);
tpiu_writel(drvdata, 0x101, TPIU_FFCR);
TPIU_LOCK(drvdata);
return 0;
}
static int __tpiu_enable_to_sdc(struct tpiu_drvdata *drvdata)
{
int ret;
if (!drvdata->reg)
return -EINVAL;
ret = regulator_set_optimum_mode(drvdata->reg, drvdata->reg_hpm);
if (ret < 0)
return ret;
ret = regulator_set_voltage(drvdata->reg, drvdata->reg_low,
drvdata->reg_high);
if (ret)
goto err0;
ret = regulator_enable(drvdata->reg);
if (ret)
goto err1;
msm_tlmm_misc_reg_write(TLMM_SDC2_HDRV_PULL_CTL, 0x16D);
msm_tlmm_misc_reg_write(TLMM_ETM_MODE_REG, 1);
TPIU_UNLOCK(drvdata);
tpiu_writel(drvdata, 0x8, TPIU_CURR_PORTSZ);
tpiu_writel(drvdata, 0x103, TPIU_FFCR);
TPIU_LOCK(drvdata);
return 0;
err1:
regulator_set_voltage(drvdata->reg, 0, drvdata->reg_high);
err0:
regulator_set_optimum_mode(drvdata->reg, 0);
return ret;
}
static int tpiu_enable(struct coresight_device *csdev)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
int ret;
ret = clk_prepare_enable(drvdata->clk);
if (ret)
return ret;
mutex_lock(&drvdata->mutex);
if (drvdata->out_mode == TPIU_OUT_MODE_MICTOR)
ret = __tpiu_enable_to_mictor(drvdata);
else
ret = __tpiu_enable_to_sdc(drvdata);
if (ret)
goto err;
drvdata->enable = true;
mutex_unlock(&drvdata->mutex);
dev_info(drvdata->dev, "TPIU enabled\n");
return 0;
err:
mutex_unlock(&drvdata->mutex);
clk_disable_unprepare(drvdata->clk);
return ret;
}
static void __tpiu_disable(struct tpiu_drvdata *drvdata)
{
TPIU_UNLOCK(drvdata);
tpiu_flush_and_stop(drvdata);
TPIU_LOCK(drvdata);
}
static void __tpiu_disable_seta(struct tpiu_drvdata *drvdata)
{
int i;
for (i = 0; i < drvdata->seta_gpiocnt; i++)
gpio_free(drvdata->seta_gpios[i]);
}
static void __tpiu_disable_setb(struct tpiu_drvdata *drvdata)
{
int i;
for (i = 0; i < drvdata->setb_gpiocnt; i++)
gpio_free(drvdata->setb_gpios[i]);
}
static void __tpiu_disable_to_mictor(struct tpiu_drvdata *drvdata)
{
__tpiu_disable(drvdata);
if (drvdata->set == TPIU_SET_A)
__tpiu_disable_seta(drvdata);
else if (drvdata->set == TPIU_SET_B)
__tpiu_disable_setb(drvdata);
}
static void __tpiu_disable_to_sdc(struct tpiu_drvdata *drvdata)
{
__tpiu_disable(drvdata);
msm_tlmm_misc_reg_write(TLMM_ETM_MODE_REG, 0);
regulator_disable(drvdata->reg);
regulator_set_optimum_mode(drvdata->reg, 0);
regulator_set_voltage(drvdata->reg, 0, drvdata->reg_high);
}
static void tpiu_disable(struct coresight_device *csdev)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
mutex_lock(&drvdata->mutex);
if (drvdata->out_mode == TPIU_OUT_MODE_MICTOR)
__tpiu_disable_to_mictor(drvdata);
else
__tpiu_disable_to_sdc(drvdata);
drvdata->enable = false;
mutex_unlock(&drvdata->mutex);
clk_disable_unprepare(drvdata->clk);
dev_info(drvdata->dev, "TPIU disabled\n");
}
static void tpiu_abort(struct coresight_device *csdev)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
__tpiu_disable(drvdata);
dev_info(drvdata->dev, "TPIU aborted\n");
}
static const struct coresight_ops_sink tpiu_sink_ops = {
.enable = tpiu_enable,
.disable = tpiu_disable,
.abort = tpiu_abort,
};
static ssize_t tpiu_show_out_mode(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(dev->parent);
return scnprintf(buf, PAGE_SIZE, "%s\n",
drvdata->out_mode == TPIU_OUT_MODE_MICTOR ?
"mictor" : "sdc");
}
static ssize_t tpiu_store_out_mode(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(dev->parent);
char str[10] = "";
int ret;
if (strlen(buf) >= 10)
return -EINVAL;
if (sscanf(buf, "%s", str) != 1)
return -EINVAL;
mutex_lock(&drvdata->mutex);
if (!strcmp(str, "mictor")) {
if (drvdata->out_mode == TPIU_OUT_MODE_MICTOR)
goto out;
if (!drvdata->enable) {
drvdata->out_mode = TPIU_OUT_MODE_MICTOR;
goto out;
}
__tpiu_disable_to_sdc(drvdata);
ret = __tpiu_enable_to_mictor(drvdata);
if (ret) {
dev_err(drvdata->dev, "failed to enable mictor\n");
goto err;
}
drvdata->out_mode = TPIU_OUT_MODE_MICTOR;
} else if (!strcmp(str, "sdc")) {
if (drvdata->out_mode == TPIU_OUT_MODE_SDC)
goto out;
if (!drvdata->enable) {
drvdata->out_mode = TPIU_OUT_MODE_SDC;
goto out;
}
__tpiu_disable_to_mictor(drvdata);
ret = __tpiu_enable_to_sdc(drvdata);
if (ret) {
dev_err(drvdata->dev, "failed to enable sdc\n");
goto err;
}
drvdata->out_mode = TPIU_OUT_MODE_SDC;
}
out:
mutex_unlock(&drvdata->mutex);
return size;
err:
mutex_unlock(&drvdata->mutex);
return ret;
}
static DEVICE_ATTR(out_mode, S_IRUGO | S_IWUSR, tpiu_show_out_mode,
tpiu_store_out_mode);
static const struct coresight_ops tpiu_cs_ops = {
.sink_ops = &tpiu_sink_ops,
};
static ssize_t tpiu_show_set(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(dev->parent);
return scnprintf(buf, PAGE_SIZE, "%s\n",
drvdata->set == TPIU_SET_A ?
"a" : "b");
}
static ssize_t tpiu_store_set(struct device *dev, struct device_attribute *attr,
const char *buf, size_t size)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(dev->parent);
char str[10] = "";
int ret;
if (strlen(buf) >= 10)
return -EINVAL;
if (sscanf(buf, "%s", str) != 1)
return -EINVAL;
mutex_lock(&drvdata->mutex);
if (!strcmp(str, "a")) {
if (drvdata->set == TPIU_SET_A)
goto out;
if (!drvdata->enable || drvdata->out_mode !=
TPIU_OUT_MODE_MICTOR) {
drvdata->set = TPIU_SET_A;
goto out;
}
__tpiu_disable_setb(drvdata);
ret = __tpiu_enable_seta(drvdata);
if (ret) {
dev_err(drvdata->dev, "failed to enable set A\n");
goto err;
}
drvdata->set = TPIU_SET_A;
} else if (!strcmp(str, "b")) {
if (drvdata->set == TPIU_SET_B)
goto out;
if (!drvdata->enable || drvdata->out_mode !=
TPIU_OUT_MODE_MICTOR) {
drvdata->set = TPIU_SET_B;
goto out;
}
__tpiu_disable_seta(drvdata);
ret = __tpiu_enable_setb(drvdata);
if (ret) {
dev_err(drvdata->dev, "failed to enable set B\n");
goto err;
}
drvdata->set = TPIU_SET_B;
}
out:
mutex_unlock(&drvdata->mutex);
return size;
err:
mutex_unlock(&drvdata->mutex);
return ret;
}
static DEVICE_ATTR(set, S_IRUGO | S_IWUSR, tpiu_show_set, tpiu_store_set);
static struct attribute *tpiu_attrs[] = {
&dev_attr_out_mode.attr,
&dev_attr_set.attr,
NULL,
};
static struct attribute_group tpiu_attr_grp = {
.attrs = tpiu_attrs,
};
static const struct attribute_group *tpiu_attr_grps[] = {
&tpiu_attr_grp,
NULL,
};
static int __devinit tpiu_parse_of_data(struct platform_device *pdev,
struct tpiu_drvdata *drvdata)
{
struct device_node *node = pdev->dev.of_node;
struct device_node *reg_node = NULL;
struct device *dev = &pdev->dev;
const __be32 *prop;
int i, len, gpio, ret;
uint32_t *seta_cfgs, *setb_cfgs;
reg_node = of_parse_phandle(node, "vdd-supply", 0);
if (reg_node) {
drvdata->reg = devm_regulator_get(dev, "vdd");
if (IS_ERR(drvdata->reg))
return PTR_ERR(drvdata->reg);
prop = of_get_property(node, "qcom,vdd-voltage-level", &len);
if (!prop || (len != (2 * sizeof(__be32)))) {
of_node_put(reg_node);
return -EINVAL;
} else {
drvdata->reg_low = be32_to_cpup(&prop[0]);
drvdata->reg_high = be32_to_cpup(&prop[1]);
}
prop = of_get_property(node, "qcom,vdd-current-level", &len);
if (!prop || (len != (2 * sizeof(__be32)))) {
of_node_put(reg_node);
return -EINVAL;
} else {
drvdata->reg_lpm = be32_to_cpup(&prop[0]);
drvdata->reg_hpm = be32_to_cpup(&prop[1]);
}
of_node_put(reg_node);
} else {
dev_err(dev, "sdc voltage supply not specified or available\n");
}
drvdata->out_mode = TPIU_OUT_MODE_MICTOR;
drvdata->set = TPIU_SET_B;
drvdata->seta_gpiocnt = of_gpio_named_count(node, "qcom,seta-gpios");
if (drvdata->seta_gpiocnt) {
drvdata->seta_gpios = devm_kzalloc(dev,
sizeof(*drvdata->seta_gpios) *
drvdata->seta_gpiocnt, GFP_KERNEL);
if (!drvdata->seta_gpios)
return -ENOMEM;
for (i = 0; i < drvdata->seta_gpiocnt; i++) {
gpio = of_get_named_gpio(node, "qcom,seta-gpios", i);
if (!gpio_is_valid(gpio))
return gpio;
drvdata->seta_gpios[i] = gpio;
}
drvdata->seta_cfgs = devm_kzalloc(dev,
sizeof(*drvdata->seta_cfgs) *
drvdata->seta_gpiocnt, GFP_KERNEL);
if (!drvdata->seta_cfgs)
return -ENOMEM;
seta_cfgs = devm_kzalloc(dev, sizeof(*seta_cfgs) *
drvdata->seta_gpiocnt, GFP_KERNEL);
if (!seta_cfgs)
return -ENOMEM;
ret = of_property_read_u32_array(node, "qcom,seta-gpios-func",
(u32 *)seta_cfgs,
drvdata->seta_gpiocnt);
if (ret)
return ret;
for (i = 0; i < drvdata->seta_gpiocnt; i++)
drvdata->seta_cfgs[i].func = seta_cfgs[i];
ret = of_property_read_u32_array(node, "qcom,seta-gpios-drv",
(u32 *)seta_cfgs,
drvdata->seta_gpiocnt);
if (ret)
return ret;
for (i = 0; i < drvdata->seta_gpiocnt; i++)
drvdata->seta_cfgs[i].drv = seta_cfgs[i];
ret = of_property_read_u32_array(node, "qcom,seta-gpios-pull",
(u32 *)seta_cfgs,
drvdata->seta_gpiocnt);
if (ret)
return ret;
for (i = 0; i < drvdata->seta_gpiocnt; i++)
drvdata->seta_cfgs[i].pull = seta_cfgs[i];
ret = of_property_read_u32_array(node, "qcom,seta-gpios-dir",
(u32 *)seta_cfgs,
drvdata->seta_gpiocnt);
if (ret)
return ret;
for (i = 0; i < drvdata->seta_gpiocnt; i++)
drvdata->seta_cfgs[i].dir = seta_cfgs[i];
} else {
dev_err(dev, "seta gpios not specified\n");
}
drvdata->setb_gpiocnt = of_gpio_named_count(node, "qcom,setb-gpios");
if (drvdata->setb_gpiocnt) {
drvdata->setb_gpios = devm_kzalloc(dev,
sizeof(*drvdata->setb_gpios) *
drvdata->setb_gpiocnt, GFP_KERNEL);
if (!drvdata->setb_gpios)
return -ENOMEM;
for (i = 0; i < drvdata->setb_gpiocnt; i++) {
gpio = of_get_named_gpio(node, "qcom,setb-gpios", i);
if (!gpio_is_valid(gpio))
return gpio;
drvdata->setb_gpios[i] = gpio;
}
drvdata->setb_cfgs = devm_kzalloc(dev,
sizeof(*drvdata->setb_cfgs) *
drvdata->setb_gpiocnt, GFP_KERNEL);
if (!drvdata->setb_cfgs)
return -ENOMEM;
setb_cfgs = devm_kzalloc(dev, sizeof(*setb_cfgs) *
drvdata->setb_gpiocnt, GFP_KERNEL);
if (!setb_cfgs)
return -ENOMEM;
ret = of_property_read_u32_array(node, "qcom,setb-gpios-func",
(u32 *)setb_cfgs,
drvdata->setb_gpiocnt);
if (ret)
return ret;
for (i = 0; i < drvdata->setb_gpiocnt; i++)
drvdata->setb_cfgs[i].func = setb_cfgs[i];
ret = of_property_read_u32_array(node, "qcom,setb-gpios-drv",
(u32 *)setb_cfgs,
drvdata->setb_gpiocnt);
if (ret)
return ret;
for (i = 0; i < drvdata->setb_gpiocnt; i++)
drvdata->setb_cfgs[i].drv = setb_cfgs[i];
ret = of_property_read_u32_array(node, "qcom,setb-gpios-pull",
(u32 *)setb_cfgs,
drvdata->setb_gpiocnt);
if (ret)
return ret;
for (i = 0; i < drvdata->setb_gpiocnt; i++)
drvdata->setb_cfgs[i].pull = setb_cfgs[i];
ret = of_property_read_u32_array(node, "qcom,setb-gpios-dir",
(u32 *)setb_cfgs,
drvdata->setb_gpiocnt);
if (ret)
return ret;
for (i = 0; i < drvdata->setb_gpiocnt; i++)
drvdata->setb_cfgs[i].dir = setb_cfgs[i];
} else {
dev_err(dev, "setb gpios not specified\n");
}
return 0;
}
static int __devinit tpiu_probe(struct platform_device *pdev)
{
int ret;
struct device *dev = &pdev->dev;
struct coresight_platform_data *pdata;
struct tpiu_drvdata *drvdata;
struct resource *res;
struct coresight_desc *desc;
if (pdev->dev.of_node) {
pdata = of_get_coresight_platform_data(dev, pdev->dev.of_node);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
pdev->dev.platform_data = pdata;
}
drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
if (!drvdata)
return -ENOMEM;
drvdata->dev = &pdev->dev;
platform_set_drvdata(pdev, drvdata);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENODEV;
drvdata->base = devm_ioremap(dev, res->start, resource_size(res));
if (!drvdata->base)
return -ENOMEM;
mutex_init(&drvdata->mutex);
drvdata->clk = devm_clk_get(dev, "core_clk");
if (IS_ERR(drvdata->clk))
return PTR_ERR(drvdata->clk);
ret = clk_set_rate(drvdata->clk, CORESIGHT_CLK_RATE_TRACE);
if (ret)
return ret;
ret = clk_prepare_enable(drvdata->clk);
if (ret)
return ret;
/* Disable tpiu to support older targets that need this */
__tpiu_disable(drvdata);
clk_disable_unprepare(drvdata->clk);
if (pdev->dev.of_node) {
ret = tpiu_parse_of_data(pdev, drvdata);
if (ret)
return ret;
}
desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
if (!desc)
return -ENOMEM;
desc->type = CORESIGHT_DEV_TYPE_SINK;
desc->subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_PORT;
desc->ops = &tpiu_cs_ops;
desc->pdata = pdev->dev.platform_data;
desc->dev = &pdev->dev;
desc->groups = tpiu_attr_grps;
desc->owner = THIS_MODULE;
drvdata->csdev = coresight_register(desc);
if (IS_ERR(drvdata->csdev))
return PTR_ERR(drvdata->csdev);
dev_info(dev, "TPIU initialized\n");
return 0;
}
static int __devexit tpiu_remove(struct platform_device *pdev)
{
struct tpiu_drvdata *drvdata = platform_get_drvdata(pdev);
coresight_unregister(drvdata->csdev);
return 0;
}
static struct of_device_id tpiu_match[] = {
{.compatible = "arm,coresight-tpiu"},
{}
};
static struct platform_driver tpiu_driver = {
.probe = tpiu_probe,
.remove = __devexit_p(tpiu_remove),
.driver = {
.name = "coresight-tpiu",
.owner = THIS_MODULE,
.of_match_table = tpiu_match,
},
};
static int __init tpiu_init(void)
{
return platform_driver_register(&tpiu_driver);
}
module_init(tpiu_init);
static void __exit tpiu_exit(void)
{
platform_driver_unregister(&tpiu_driver);
}
module_exit(tpiu_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("CoreSight Trace Port Interface Unit driver");