#include <linux/platform_device.h>
#include <linux/of_platform.h>
+#include <linux/i2c.h>
+#include <linux/i2c-mux.h>
+
#include "of_private.h"
static struct selftest_results {
return pdev != NULL;
}
-static const char *selftest_path(int nr)
+#if IS_ENABLED(CONFIG_I2C)
+
+/* get the i2c client device instantiated at the path */
+static struct i2c_client *of_path_to_i2c_client(const char *path)
+{
+ struct device_node *np;
+ struct i2c_client *client;
+
+ np = of_find_node_by_path(path);
+ if (np == NULL)
+ return NULL;
+
+ client = of_find_i2c_device_by_node(np);
+ of_node_put(np);
+
+ return client;
+}
+
+/* find out if a i2c client device exists at that path */
+static int of_path_i2c_client_exists(const char *path)
+{
+ struct i2c_client *client;
+
+ client = of_path_to_i2c_client(path);
+ if (client)
+ put_device(&client->dev);
+ return client != NULL;
+}
+#else
+static int of_path_i2c_client_exists(const char *path)
+{
+ return 0;
+}
+#endif
+
+enum overlay_type {
+ PDEV_OVERLAY,
+ I2C_OVERLAY
+};
+
+static int of_path_device_type_exists(const char *path,
+ enum overlay_type ovtype)
{
+ switch (ovtype) {
+ case PDEV_OVERLAY:
+ return of_path_platform_device_exists(path);
+ case I2C_OVERLAY:
+ return of_path_i2c_client_exists(path);
+ }
+ return 0;
+}
+
+static const char *selftest_path(int nr, enum overlay_type ovtype)
+{
+ const char *base;
static char buf[256];
- snprintf(buf, sizeof(buf) - 1,
- "/testcase-data/overlay-node/test-bus/test-selftest%d", nr);
+ switch (ovtype) {
+ case PDEV_OVERLAY:
+ base = "/testcase-data/overlay-node/test-bus";
+ break;
+ case I2C_OVERLAY:
+ base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
+ break;
+ default:
+ buf[0] = '\0';
+ return buf;
+ }
+ snprintf(buf, sizeof(buf) - 1, "%s/test-selftest%d", base, nr);
buf[sizeof(buf) - 1] = '\0';
-
return buf;
}
+static int of_selftest_device_exists(int selftest_nr, enum overlay_type ovtype)
+{
+ const char *path;
+
+ path = selftest_path(selftest_nr, ovtype);
+
+ switch (ovtype) {
+ case PDEV_OVERLAY:
+ return of_path_platform_device_exists(path);
+ case I2C_OVERLAY:
+ return of_path_i2c_client_exists(path);
+ }
+ return 0;
+}
+
static const char *overlay_path(int nr)
{
static char buf[256];
/* apply an overlay while checking before and after states */
static int of_selftest_apply_overlay_check(int overlay_nr, int selftest_nr,
- int before, int after)
+ int before, int after, enum overlay_type ovtype)
{
int ret;
/* selftest device must not be in before state */
- if (of_path_platform_device_exists(selftest_path(selftest_nr))
- != before) {
+ if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr),
- selftest_path(selftest_nr),
+ selftest_path(selftest_nr, ovtype),
!before ? "enabled" : "disabled");
return -EINVAL;
}
}
/* selftest device must be to set to after state */
- if (of_path_platform_device_exists(selftest_path(selftest_nr))
- != after) {
+ if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
overlay_path(overlay_nr),
- selftest_path(selftest_nr),
+ selftest_path(selftest_nr, ovtype),
!after ? "enabled" : "disabled");
return -EINVAL;
}
/* apply an overlay and then revert it while checking before, after states */
static int of_selftest_apply_revert_overlay_check(int overlay_nr,
- int selftest_nr, int before, int after)
+ int selftest_nr, int before, int after,
+ enum overlay_type ovtype)
{
int ret, ov_id;
/* selftest device must be in before state */
- if (of_path_platform_device_exists(selftest_path(selftest_nr))
- != before) {
+ if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr),
- selftest_path(selftest_nr),
+ selftest_path(selftest_nr, ovtype),
!before ? "enabled" : "disabled");
return -EINVAL;
}
}
/* selftest device must be in after state */
- if (of_path_platform_device_exists(selftest_path(selftest_nr))
- != after) {
+ if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
overlay_path(overlay_nr),
- selftest_path(selftest_nr),
+ selftest_path(selftest_nr, ovtype),
!after ? "enabled" : "disabled");
return -EINVAL;
}
if (ret != 0) {
selftest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
overlay_path(overlay_nr),
- selftest_path(selftest_nr));
+ selftest_path(selftest_nr, ovtype));
return ret;
}
/* selftest device must be again in before state */
- if (of_path_platform_device_exists(selftest_path(selftest_nr))
- != before) {
+ if (of_selftest_device_exists(selftest_nr, PDEV_OVERLAY) != before) {
selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr),
- selftest_path(selftest_nr),
+ selftest_path(selftest_nr, ovtype),
!before ? "enabled" : "disabled");
return -EINVAL;
}
int ret;
/* device should enable */
- ret = of_selftest_apply_overlay_check(0, 0, 0, 1);
+ ret = of_selftest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
if (ret != 0)
return;
int ret;
/* device should disable */
- ret = of_selftest_apply_overlay_check(1, 1, 1, 0);
+ ret = of_selftest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
if (ret != 0)
return;
int ret;
/* device should enable */
- ret = of_selftest_apply_overlay_check(2, 2, 0, 1);
+ ret = of_selftest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
if (ret != 0)
return;
int ret;
/* device should disable */
- ret = of_selftest_apply_overlay_check(3, 3, 1, 0);
+ ret = of_selftest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
if (ret != 0)
return;
int ret;
/* device should disable */
- ret = of_selftest_apply_overlay_check(4, 4, 0, 1);
+ ret = of_selftest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
if (ret != 0)
return;
int ret;
/* device should disable */
- ret = of_selftest_apply_revert_overlay_check(5, 5, 0, 1);
+ ret = of_selftest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
if (ret != 0)
return;
/* selftest device must be in before state */
for (i = 0; i < 2; i++) {
- if (of_path_platform_device_exists(
- selftest_path(selftest_nr + i))
+ if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
!= before) {
selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr + i),
- selftest_path(selftest_nr + i),
+ selftest_path(selftest_nr + i,
+ PDEV_OVERLAY),
!before ? "enabled" : "disabled");
return;
}
for (i = 0; i < 2; i++) {
/* selftest device must be in after state */
- if (of_path_platform_device_exists(
- selftest_path(selftest_nr + i))
+ if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
!= after) {
selftest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
overlay_path(overlay_nr + i),
- selftest_path(selftest_nr + i),
+ selftest_path(selftest_nr + i,
+ PDEV_OVERLAY),
!after ? "enabled" : "disabled");
return;
}
if (ret != 0) {
selftest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
overlay_path(overlay_nr + i),
- selftest_path(selftest_nr + i));
+ selftest_path(selftest_nr + i,
+ PDEV_OVERLAY));
return;
}
}
for (i = 0; i < 2; i++) {
/* selftest device must be again in before state */
- if (of_path_platform_device_exists(
- selftest_path(selftest_nr + i))
+ if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
!= before) {
selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr + i),
- selftest_path(selftest_nr + i),
+ selftest_path(selftest_nr + i,
+ PDEV_OVERLAY),
!before ? "enabled" : "disabled");
return;
}
if (ret == 0) {
selftest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
overlay_path(overlay_nr + 0),
- selftest_path(selftest_nr));
+ selftest_path(selftest_nr,
+ PDEV_OVERLAY));
return;
}
if (ret != 0) {
selftest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
overlay_path(overlay_nr + i),
- selftest_path(selftest_nr));
+ selftest_path(selftest_nr,
+ PDEV_OVERLAY));
return;
}
}
char *child_path;
/* device should disable */
- ret = of_selftest_apply_overlay_check(10, 10, 0, 1);
- if (selftest(ret == 0, "overlay test %d failed; overlay application\n", 10))
+ ret = of_selftest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
+ if (selftest(ret == 0,
+ "overlay test %d failed; overlay application\n", 10))
return;
child_path = kasprintf(GFP_KERNEL, "%s/test-selftest101",
- selftest_path(10));
+ selftest_path(10, PDEV_OVERLAY));
if (selftest(child_path, "overlay test %d failed; kasprintf\n", 10))
return;
- ret = of_path_platform_device_exists(child_path);
+ ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
kfree(child_path);
if (selftest(ret, "overlay test %d failed; no child device\n", 10))
return;
int ret;
/* device should disable */
- ret = of_selftest_apply_revert_overlay_check(11, 11, 0, 1);
- if (selftest(ret == 0, "overlay test %d failed; overlay application\n", 11))
+ ret = of_selftest_apply_revert_overlay_check(11, 11, 0, 1,
+ PDEV_OVERLAY);
+ if (selftest(ret == 0,
+ "overlay test %d failed; overlay application\n", 11))
+ return;
+}
+
+#if IS_ENABLED(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
+
+struct selftest_i2c_bus_data {
+ struct platform_device *pdev;
+ struct i2c_adapter adap;
+};
+
+static int selftest_i2c_master_xfer(struct i2c_adapter *adap,
+ struct i2c_msg *msgs, int num)
+{
+ struct selftest_i2c_bus_data *std = i2c_get_adapdata(adap);
+
+ (void)std;
+
+ return num;
+}
+
+static u32 selftest_i2c_functionality(struct i2c_adapter *adap)
+{
+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static const struct i2c_algorithm selftest_i2c_algo = {
+ .master_xfer = selftest_i2c_master_xfer,
+ .functionality = selftest_i2c_functionality,
+};
+
+static int selftest_i2c_bus_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct selftest_i2c_bus_data *std;
+ struct i2c_adapter *adap;
+ int ret;
+
+ if (np == NULL) {
+ dev_err(dev, "No OF data for device\n");
+ return -EINVAL;
+
+ }
+
+ dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+
+ std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
+ if (!std) {
+ dev_err(dev, "Failed to allocate selftest i2c data\n");
+ return -ENOMEM;
+ }
+
+ /* link them together */
+ std->pdev = pdev;
+ platform_set_drvdata(pdev, std);
+
+ adap = &std->adap;
+ i2c_set_adapdata(adap, std);
+ adap->nr = -1;
+ strlcpy(adap->name, pdev->name, sizeof(adap->name));
+ adap->class = I2C_CLASS_DEPRECATED;
+ adap->algo = &selftest_i2c_algo;
+ adap->dev.parent = dev;
+ adap->dev.of_node = dev->of_node;
+ adap->timeout = 5 * HZ;
+ adap->retries = 3;
+
+ ret = i2c_add_numbered_adapter(adap);
+ if (ret != 0) {
+ dev_err(dev, "Failed to add I2C adapter\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int selftest_i2c_bus_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct selftest_i2c_bus_data *std = platform_get_drvdata(pdev);
+
+ dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+ i2c_del_adapter(&std->adap);
+
+ return 0;
+}
+
+static struct of_device_id selftest_i2c_bus_match[] = {
+ { .compatible = "selftest-i2c-bus", },
+ {},
+};
+
+static struct platform_driver selftest_i2c_bus_driver = {
+ .probe = selftest_i2c_bus_probe,
+ .remove = selftest_i2c_bus_remove,
+ .driver = {
+ .name = "selftest-i2c-bus",
+ .of_match_table = of_match_ptr(selftest_i2c_bus_match),
+ },
+};
+
+static int selftest_i2c_dev_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct device_node *np = client->dev.of_node;
+
+ if (!np) {
+ dev_err(dev, "No OF node\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+
+ return 0;
+};
+
+static int selftest_i2c_dev_remove(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct device_node *np = client->dev.of_node;
+
+ dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+ return 0;
+}
+
+static const struct i2c_device_id selftest_i2c_dev_id[] = {
+ { .name = "selftest-i2c-dev" },
+ { }
+};
+
+static struct i2c_driver selftest_i2c_dev_driver = {
+ .driver = {
+ .name = "selftest-i2c-dev",
+ .owner = THIS_MODULE,
+ },
+ .probe = selftest_i2c_dev_probe,
+ .remove = selftest_i2c_dev_remove,
+ .id_table = selftest_i2c_dev_id,
+};
+
+#if IS_ENABLED(CONFIG_I2C_MUX)
+
+struct selftest_i2c_mux_data {
+ int nchans;
+ struct i2c_adapter *adap[];
+};
+
+static int selftest_i2c_mux_select_chan(struct i2c_adapter *adap,
+ void *client, u32 chan)
+{
+ return 0;
+}
+
+static int selftest_i2c_mux_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret, i, nchans, size;
+ struct device *dev = &client->dev;
+ struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
+ struct device_node *np = client->dev.of_node, *child;
+ struct selftest_i2c_mux_data *stm;
+ u32 reg, max_reg;
+
+ dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+
+ if (!np) {
+ dev_err(dev, "No OF node\n");
+ return -EINVAL;
+ }
+
+ max_reg = (u32)-1;
+ for_each_child_of_node(np, child) {
+ ret = of_property_read_u32(child, "reg", ®);
+ if (ret)
+ continue;
+ if (max_reg == (u32)-1 || reg > max_reg)
+ max_reg = reg;
+ }
+ nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
+ if (nchans == 0) {
+ dev_err(dev, "No channels\n");
+ return -EINVAL;
+ }
+
+ size = offsetof(struct selftest_i2c_mux_data, adap[nchans]);
+ stm = devm_kzalloc(dev, size, GFP_KERNEL);
+ if (!stm) {
+ dev_err(dev, "Out of memory\n");
+ return -ENOMEM;
+ }
+ stm->nchans = nchans;
+ for (i = 0; i < nchans; i++) {
+ stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
+ 0, i, 0, selftest_i2c_mux_select_chan, NULL);
+ if (!stm->adap[i]) {
+ dev_err(dev, "Failed to register mux #%d\n", i);
+ for (i--; i >= 0; i--)
+ i2c_del_mux_adapter(stm->adap[i]);
+ return -ENODEV;
+ }
+ }
+
+ i2c_set_clientdata(client, stm);
+
+ return 0;
+};
+
+static int selftest_i2c_mux_remove(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct device_node *np = client->dev.of_node;
+ struct selftest_i2c_mux_data *stm = i2c_get_clientdata(client);
+ int i;
+
+ dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+ for (i = stm->nchans - 1; i >= 0; i--)
+ i2c_del_mux_adapter(stm->adap[i]);
+ return 0;
+}
+
+static const struct i2c_device_id selftest_i2c_mux_id[] = {
+ { .name = "selftest-i2c-mux" },
+ { }
+};
+
+static struct i2c_driver selftest_i2c_mux_driver = {
+ .driver = {
+ .name = "selftest-i2c-mux",
+ .owner = THIS_MODULE,
+ },
+ .probe = selftest_i2c_mux_probe,
+ .remove = selftest_i2c_mux_remove,
+ .id_table = selftest_i2c_mux_id,
+};
+
+#endif
+
+static int of_selftest_overlay_i2c_init(void)
+{
+ int ret;
+
+ ret = i2c_add_driver(&selftest_i2c_dev_driver);
+ if (selftest(ret == 0,
+ "could not register selftest i2c device driver\n"))
+ return ret;
+
+ ret = platform_driver_register(&selftest_i2c_bus_driver);
+ if (selftest(ret == 0,
+ "could not register selftest i2c bus driver\n"))
+ return ret;
+
+#if IS_ENABLED(CONFIG_I2C_MUX)
+ ret = i2c_add_driver(&selftest_i2c_mux_driver);
+ if (selftest(ret == 0,
+ "could not register selftest i2c mux driver\n"))
+ return ret;
+#endif
+
+ return 0;
+}
+
+static void of_selftest_overlay_i2c_cleanup(void)
+{
+#if IS_ENABLED(CONFIG_I2C_MUX)
+ i2c_del_driver(&selftest_i2c_mux_driver);
+#endif
+ platform_driver_unregister(&selftest_i2c_bus_driver);
+ i2c_del_driver(&selftest_i2c_dev_driver);
+}
+
+static void of_selftest_overlay_i2c_12(void)
+{
+ int ret;
+
+ /* device should enable */
+ ret = of_selftest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
+ if (ret != 0)
+ return;
+
+ selftest(1, "overlay test %d passed\n", 12);
+}
+
+/* test deactivation of device */
+static void of_selftest_overlay_i2c_13(void)
+{
+ int ret;
+
+ /* device should disable */
+ ret = of_selftest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
+ if (ret != 0)
return;
+
+ selftest(1, "overlay test %d passed\n", 13);
+}
+
+/* just check for i2c mux existence */
+static void of_selftest_overlay_i2c_14(void)
+{
}
+static void of_selftest_overlay_i2c_15(void)
+{
+ int ret;
+
+ /* device should enable */
+ ret = of_selftest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
+ if (ret != 0)
+ return;
+
+ selftest(1, "overlay test %d passed\n", 15);
+}
+
+#else
+
+static inline void of_selftest_overlay_i2c_14(void) { }
+static inline void of_selftest_overlay_i2c_15(void) { }
+
+#endif
+
static void __init of_selftest_overlay(void)
{
struct device_node *bus_np = NULL;
goto out;
}
- if (!of_path_platform_device_exists(selftest_path(100))) {
+ if (!of_selftest_device_exists(100, PDEV_OVERLAY)) {
selftest(0, "could not find selftest0 @ \"%s\"\n",
- selftest_path(100));
+ selftest_path(100, PDEV_OVERLAY));
goto out;
}
- if (of_path_platform_device_exists(selftest_path(101))) {
+ if (of_selftest_device_exists(101, PDEV_OVERLAY)) {
selftest(0, "selftest1 @ \"%s\" should not exist\n",
- selftest_path(101));
+ selftest_path(101, PDEV_OVERLAY));
goto out;
}
of_selftest_overlay_10();
of_selftest_overlay_11();
+#if IS_ENABLED(CONFIG_I2C)
+ if (selftest(of_selftest_overlay_i2c_init() == 0, "i2c init failed\n"))
+ goto out;
+
+ of_selftest_overlay_i2c_12();
+ of_selftest_overlay_i2c_13();
+ of_selftest_overlay_i2c_14();
+ of_selftest_overlay_i2c_15();
+
+ of_selftest_overlay_i2c_cleanup();
+#endif
+
out:
of_node_put(bus_np);
}
projects / karo-tx-linux.git / commitdiff