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-rw-r--r--drivers/of/base.c136
-rw-r--r--drivers/of/gpio.c81
-rw-r--r--drivers/of/of_i2c.c2
-rw-r--r--drivers/of/of_spi.c2
4 files changed, 137 insertions, 84 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index ad8ac1a8af2..7c79e94a35e 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -410,7 +410,7 @@ struct of_modalias_table {
char *modalias;
};
static struct of_modalias_table of_modalias_table[] = {
- /* Empty for now; add entries as needed */
+ { "fsl,mcu-mpc8349emitx", "mcu-mpc8349emitx" },
};
/**
@@ -420,13 +420,12 @@ static struct of_modalias_table of_modalias_table[] = {
* @len: Length of modalias value
*
* Based on the value of the compatible property, this routine will determine
- * an appropriate modalias value for a particular device tree node. Three
- * separate methods are used to derive a modalias value.
+ * an appropriate modalias value for a particular device tree node. Two
+ * separate methods are attempted to derive a modalias value.
*
* First method is to lookup the compatible value in of_modalias_table.
- * Second is to look for a "linux,<modalias>" entry in the compatible list
- * and used that for modalias. Third is to strip off the manufacturer
- * prefix from the first compatible entry and use the remainder as modalias
+ * Second is to strip off the manufacturer prefix from the first
+ * compatible entry and use the remainder as modalias
*
* This routine returns 0 on success
*/
@@ -449,21 +448,7 @@ int of_modalias_node(struct device_node *node, char *modalias, int len)
if (!compatible)
return -ENODEV;
- /* 2. search for linux,<modalias> entry */
- p = compatible;
- while (cplen > 0) {
- if (!strncmp(p, "linux,", 6)) {
- p += 6;
- strlcpy(modalias, p, len);
- return 0;
- }
-
- i = strlen(p) + 1;
- p += i;
- cplen -= i;
- }
-
- /* 3. take first compatible entry and strip manufacturer */
+ /* 2. take first compatible entry and strip manufacturer */
p = strchr(compatible, ',');
if (!p)
return -ENODEV;
@@ -473,3 +458,112 @@ int of_modalias_node(struct device_node *node, char *modalias, int len)
}
EXPORT_SYMBOL_GPL(of_modalias_node);
+/**
+ * of_parse_phandles_with_args - Find a node pointed by phandle in a list
+ * @np: pointer to a device tree node containing a list
+ * @list_name: property name that contains a list
+ * @cells_name: property name that specifies phandles' arguments count
+ * @index: index of a phandle to parse out
+ * @out_node: pointer to device_node struct pointer (will be filled)
+ * @out_args: pointer to arguments pointer (will be filled)
+ *
+ * This function is useful to parse lists of phandles and their arguments.
+ * Returns 0 on success and fills out_node and out_args, on error returns
+ * appropriate errno value.
+ *
+ * Example:
+ *
+ * phandle1: node1 {
+ * #list-cells = <2>;
+ * }
+ *
+ * phandle2: node2 {
+ * #list-cells = <1>;
+ * }
+ *
+ * node3 {
+ * list = <&phandle1 1 2 &phandle2 3>;
+ * }
+ *
+ * To get a device_node of the `node2' node you may call this:
+ * of_parse_phandles_with_args(node3, "list", "#list-cells", 2, &node2, &args);
+ */
+int of_parse_phandles_with_args(struct device_node *np, const char *list_name,
+ const char *cells_name, int index,
+ struct device_node **out_node,
+ const void **out_args)
+{
+ int ret = -EINVAL;
+ const u32 *list;
+ const u32 *list_end;
+ int size;
+ int cur_index = 0;
+ struct device_node *node = NULL;
+ const void *args;
+
+ list = of_get_property(np, list_name, &size);
+ if (!list) {
+ ret = -ENOENT;
+ goto err0;
+ }
+ list_end = list + size / sizeof(*list);
+
+ while (list < list_end) {
+ const u32 *cells;
+ const phandle *phandle;
+
+ phandle = list;
+ args = list + 1;
+
+ /* one cell hole in the list = <>; */
+ if (!*phandle) {
+ list++;
+ goto next;
+ }
+
+ node = of_find_node_by_phandle(*phandle);
+ if (!node) {
+ pr_debug("%s: could not find phandle\n",
+ np->full_name);
+ goto err0;
+ }
+
+ cells = of_get_property(node, cells_name, &size);
+ if (!cells || size != sizeof(*cells)) {
+ pr_debug("%s: could not get %s for %s\n",
+ np->full_name, cells_name, node->full_name);
+ goto err1;
+ }
+
+ /* Next phandle is at offset of one phandle cell + #cells */
+ list += 1 + *cells;
+ if (list > list_end) {
+ pr_debug("%s: insufficient arguments length\n",
+ np->full_name);
+ goto err1;
+ }
+next:
+ if (cur_index == index)
+ break;
+
+ of_node_put(node);
+ node = NULL;
+ cur_index++;
+ }
+
+ if (!node) {
+ ret = -ENOENT;
+ goto err0;
+ }
+
+ *out_node = node;
+ *out_args = args;
+
+ return 0;
+err1:
+ of_node_put(node);
+err0:
+ pr_debug("%s failed with status %d\n", __func__, ret);
+ return ret;
+}
+EXPORT_SYMBOL(of_parse_phandles_with_args);
diff --git a/drivers/of/gpio.c b/drivers/of/gpio.c
index 1c9cab844f1..7cd7301b583 100644
--- a/drivers/of/gpio.c
+++ b/drivers/of/gpio.c
@@ -28,78 +28,35 @@
*/
int of_get_gpio(struct device_node *np, int index)
{
- int ret = -EINVAL;
+ int ret;
struct device_node *gc;
struct of_gpio_chip *of_gc = NULL;
int size;
- const u32 *gpios;
- u32 nr_cells;
- int i;
const void *gpio_spec;
const u32 *gpio_cells;
- int gpio_index = 0;
- gpios = of_get_property(np, "gpios", &size);
- if (!gpios) {
- ret = -ENOENT;
+ ret = of_parse_phandles_with_args(np, "gpios", "#gpio-cells", index,
+ &gc, &gpio_spec);
+ if (ret) {
+ pr_debug("%s: can't parse gpios property\n", __func__);
goto err0;
}
- nr_cells = size / sizeof(u32);
-
- for (i = 0; i < nr_cells; gpio_index++) {
- const phandle *gpio_phandle;
-
- gpio_phandle = gpios + i;
- gpio_spec = gpio_phandle + 1;
-
- /* one cell hole in the gpios = <>; */
- if (!*gpio_phandle) {
- if (gpio_index == index)
- return -ENOENT;
- i++;
- continue;
- }
-
- gc = of_find_node_by_phandle(*gpio_phandle);
- if (!gc) {
- pr_debug("%s: could not find phandle for gpios\n",
- np->full_name);
- goto err0;
- }
-
- of_gc = gc->data;
- if (!of_gc) {
- pr_debug("%s: gpio controller %s isn't registered\n",
- np->full_name, gc->full_name);
- goto err1;
- }
-
- gpio_cells = of_get_property(gc, "#gpio-cells", &size);
- if (!gpio_cells || size != sizeof(*gpio_cells) ||
- *gpio_cells != of_gc->gpio_cells) {
- pr_debug("%s: wrong #gpio-cells for %s\n",
- np->full_name, gc->full_name);
- goto err1;
- }
-
- /* Next phandle is at phandle cells + #gpio-cells */
- i += sizeof(*gpio_phandle) / sizeof(u32) + *gpio_cells;
- if (i >= nr_cells + 1) {
- pr_debug("%s: insufficient gpio-spec length\n",
- np->full_name);
- goto err1;
- }
-
- if (gpio_index == index)
- break;
-
- of_gc = NULL;
- of_node_put(gc);
- }
+ of_gc = gc->data;
if (!of_gc) {
- ret = -ENOENT;
- goto err0;
+ pr_debug("%s: gpio controller %s isn't registered\n",
+ np->full_name, gc->full_name);
+ ret = -ENODEV;
+ goto err1;
+ }
+
+ gpio_cells = of_get_property(gc, "#gpio-cells", &size);
+ if (!gpio_cells || size != sizeof(*gpio_cells) ||
+ *gpio_cells != of_gc->gpio_cells) {
+ pr_debug("%s: wrong #gpio-cells for %s\n",
+ np->full_name, gc->full_name);
+ ret = -EINVAL;
+ goto err1;
}
ret = of_gc->xlate(of_gc, np, gpio_spec);
diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c
index 6a98dc8aa30..24bbef777c1 100644
--- a/drivers/of/of_i2c.c
+++ b/drivers/of/of_i2c.c
@@ -41,7 +41,7 @@ void of_register_i2c_devices(struct i2c_adapter *adap,
info.addr = *addr;
- request_module(info.type);
+ request_module("%s", info.type);
result = i2c_new_device(adap, &info);
if (result == NULL) {
diff --git a/drivers/of/of_spi.c b/drivers/of/of_spi.c
index b01eec026f6..bed0ed6dcdc 100644
--- a/drivers/of/of_spi.c
+++ b/drivers/of/of_spi.c
@@ -61,6 +61,8 @@ void of_register_spi_devices(struct spi_master *master, struct device_node *np)
spi->mode |= SPI_CPHA;
if (of_find_property(nc, "spi-cpol", NULL))
spi->mode |= SPI_CPOL;
+ if (of_find_property(nc, "spi-cs-high", NULL))
+ spi->mode |= SPI_CS_HIGH;
/* Device speed */
prop = of_get_property(nc, "spi-max-frequency", &len);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-16 17:53:40 +0000