[PATCH 1/3] of: Add prefix parameter to of_modalias_node().
From: David Daney <hidden>
Date: 2012-05-11 22:05:43
From: David Daney <redacted> When generating MODALIASes, it is convenient to add things like "spi:" or "i2c:" to the front of the strings. This allows the standard modprobe to find the right driver when automatically populating bus children from the device tree structure. Add a prefix parameter, and adjust callers. For of_register_spi_devices() use the "spi:" prefix. Signed-off-by: David Daney <redacted> Cc: Liam Girdwood <redacted> Cc: Timur Tabi <redacted> Cc: Mark Brown <redacted> Cc: Jaroslav Kysela <perex@perex.cz> Cc: Takashi Iwai <redacted> Cc: alsa-devel@alsa-project.org Cc: linuxppc-dev@lists.ozlabs.org --- drivers/of/base.c | 22 ++++++++++++++++------ drivers/of/of_i2c.c | 2 +- drivers/of/of_spi.c | 2 +- include/linux/of.h | 3 ++- sound/soc/fsl/mpc8610_hpcd.c | 2 +- sound/soc/fsl/p1022_ds.c | 2 +- 6 files changed, 22 insertions(+), 11 deletions(-)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 5806449..f05a520 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c@@ -575,26 +575,36 @@ EXPORT_SYMBOL(of_find_matching_node); /** * of_modalias_node - Lookup appropriate modalias for a device node * @node: pointer to a device tree node + * @prefix: prefix to be added to the compatible property, may be NULL * @modalias: Pointer to buffer that modalias value will be copied into * @len: Length of modalias value * - * Based on the value of the compatible property, this routine will attempt - * to choose an appropriate modalias value for a particular device tree node. - * It does this by stripping the manufacturer prefix (as delimited by a ',') - * from the first entry in the compatible list property. + * Based on the value of the compatible property, this routine will + * attempt to choose an appropriate modalias value for a particular + * device tree node. It does this by stripping the manufacturer + * prefix (as delimited by a ',') from the first entry in the + * compatible list property, and appending it to the prefix. * * This routine returns 0 on success, <0 on failure. */ -int of_modalias_node(struct device_node *node, char *modalias, int len) +int of_modalias_node(struct device_node *node, const char *prefix, + char *modalias, int len) { const char *compatible, *p; int cplen; + if (len < 1) + return -EINVAL; + compatible = of_get_property(node, "compatible", &cplen); if (!compatible || strlen(compatible) > cplen) return -ENODEV; p = strchr(compatible, ','); - strlcpy(modalias, p ? p + 1 : compatible, len); + if (prefix) + strlcpy(modalias, prefix, len); + else + modalias[0] = 0; + strlcat(modalias, p ? p + 1 : compatible, len); return 0; } EXPORT_SYMBOL_GPL(of_modalias_node);
diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c
index f37fbeb..23b05ee 100644
--- a/drivers/of/of_i2c.c
+++ b/drivers/of/of_i2c.c@@ -37,7 +37,7 @@ void of_i2c_register_devices(struct i2c_adapter *adap) dev_dbg(&adap->dev, "of_i2c: register %s\n", node->full_name); - if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) { + if (of_modalias_node(node, NULL, info.type, sizeof(info.type)) < 0) { dev_err(&adap->dev, "of_i2c: modalias failure on %s\n", node->full_name); continue;
diff --git a/drivers/of/of_spi.c b/drivers/of/of_spi.c
index 6dbc074..c329c6d 100644
--- a/drivers/of/of_spi.c
+++ b/drivers/of/of_spi.c@@ -42,7 +42,7 @@ void of_register_spi_devices(struct spi_master *master) } /* Select device driver */ - if (of_modalias_node(nc, spi->modalias, + if (of_modalias_node(nc, SPI_MODULE_PREFIX, spi->modalias, sizeof(spi->modalias)) < 0) { dev_err(&master->dev, "cannot find modalias for %s\n", nc->full_name);
diff --git a/include/linux/of.h b/include/linux/of.h
index fa7fb1d..ee34d76 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h@@ -233,7 +233,8 @@ extern int of_n_addr_cells(struct device_node *np); extern int of_n_size_cells(struct device_node *np); extern const struct of_device_id *of_match_node( const struct of_device_id *matches, const struct device_node *node); -extern int of_modalias_node(struct device_node *node, char *modalias, int len); +extern int of_modalias_node(struct device_node *node, + const char *prefix, char *modalias, int len); extern struct device_node *of_parse_phandle(struct device_node *np, const char *phandle_name, int index);
diff --git a/sound/soc/fsl/mpc8610_hpcd.c b/sound/soc/fsl/mpc8610_hpcd.c
index 3fea5a1..1fa0682 100644
--- a/sound/soc/fsl/mpc8610_hpcd.c
+++ b/sound/soc/fsl/mpc8610_hpcd.c@@ -254,7 +254,7 @@ static int codec_node_dev_name(struct device_node *np, char *buf, size_t len) char temp[DAI_NAME_SIZE]; struct i2c_client *i2c; - of_modalias_node(np, temp, DAI_NAME_SIZE); + of_modalias_node(np, NULL, temp, DAI_NAME_SIZE); iprop = of_get_property(np, "reg", NULL); if (!iprop)
diff --git a/sound/soc/fsl/p1022_ds.c b/sound/soc/fsl/p1022_ds.c
index 982a1c9..3ea51ec 100644
--- a/sound/soc/fsl/p1022_ds.c
+++ b/sound/soc/fsl/p1022_ds.c@@ -257,7 +257,7 @@ static int codec_node_dev_name(struct device_node *np, char *buf, size_t len) char temp[DAI_NAME_SIZE]; struct i2c_client *i2c; - of_modalias_node(np, temp, DAI_NAME_SIZE); + of_modalias_node(np, NULL, temp, DAI_NAME_SIZE); iprop = of_get_property(np, "reg", NULL); if (!iprop)
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1.7.2.3