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authorBen Hutchings <ben@decadent.org.uk>2014-09-29 11:47:54 +0200
committerBrian Norris <computersforpeace@gmail.com>2014-10-17 09:29:21 -0700
commit70f3ce0510afdad7cbaf27ab7ab961377205c782 (patch)
tree29df1a4e2259f90e0d2a1d35a7c8484688dc6253
parent90e55b3812a1245bb674afcc4410ddba7db402f6 (diff)
mtd: spi-nor: make spi_nor_scan() take a chip type name, not spi_device_id
Drivers currently call spi_nor_match_id() and then spi_nor_scan(). This adds a dependency on struct spi_device_id which we want to avoid. Make spi_nor_scan() do it for them. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
-rw-r--r--drivers/mtd/devices/m25p80.c4
-rw-r--r--drivers/mtd/spi-nor/fsl-quadspi.c7
-rw-r--r--drivers/mtd/spi-nor/spi-nor.c13
-rw-r--r--include/linux/mtd/spi-nor.h20
4 files changed, 14 insertions, 30 deletions
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 822209d10689..bd5e4c6edfd4 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -193,7 +193,6 @@ static int m25p_probe(struct spi_device *spi)
{
struct mtd_part_parser_data ppdata;
struct flash_platform_data *data;
- const struct spi_device_id *id = NULL;
struct m25p *flash;
struct spi_nor *nor;
enum read_mode mode = SPI_NOR_NORMAL;
@@ -241,8 +240,7 @@ static int m25p_probe(struct spi_device *spi)
else
flash_name = spi->modalias;
- id = spi_nor_match_id(flash_name);
- ret = spi_nor_scan(nor, id, mode);
+ ret = spi_nor_scan(nor, flash_name, mode);
if (ret)
return ret;
diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c
index 8d659a2888d5..d5269a26c839 100644
--- a/drivers/mtd/spi-nor/fsl-quadspi.c
+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
@@ -881,7 +881,6 @@ static int fsl_qspi_probe(struct platform_device *pdev)
/* iterate the subnodes. */
for_each_available_child_of_node(dev->of_node, np) {
- const struct spi_device_id *id;
char modalias[40];
/* skip the holes */
@@ -909,10 +908,6 @@ static int fsl_qspi_probe(struct platform_device *pdev)
if (of_modalias_node(np, modalias, sizeof(modalias)) < 0)
goto map_failed;
- id = spi_nor_match_id(modalias);
- if (!id)
- goto map_failed;
-
ret = of_property_read_u32(np, "spi-max-frequency",
&q->clk_rate);
if (ret < 0)
@@ -921,7 +916,7 @@ static int fsl_qspi_probe(struct platform_device *pdev)
/* set the chip address for READID */
fsl_qspi_set_base_addr(q, nor);
- ret = spi_nor_scan(nor, id, SPI_NOR_QUAD);
+ ret = spi_nor_scan(nor, modalias, SPI_NOR_QUAD);
if (ret)
goto map_failed;
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index ae16aa2f6885..5c8e39977bc5 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -28,6 +28,8 @@
#define JEDEC_MFR(_jedec_id) ((_jedec_id) >> 16)
+static const struct spi_device_id *spi_nor_match_id(const char *name);
+
/*
* Read the status register, returning its value in the location
* Return the status register value.
@@ -911,9 +913,9 @@ static int spi_nor_check(struct spi_nor *nor)
return 0;
}
-int spi_nor_scan(struct spi_nor *nor, const struct spi_device_id *id,
- enum read_mode mode)
+int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
{
+ const struct spi_device_id *id = NULL;
struct flash_info *info;
struct device *dev = nor->dev;
struct mtd_info *mtd = nor->mtd;
@@ -925,6 +927,10 @@ int spi_nor_scan(struct spi_nor *nor, const struct spi_device_id *id,
if (ret)
return ret;
+ id = spi_nor_match_id(name);
+ if (!id)
+ return -ENOENT;
+
info = (void *)id->driver_data;
if (info->jedec_id) {
@@ -1113,7 +1119,7 @@ int spi_nor_scan(struct spi_nor *nor, const struct spi_device_id *id,
}
EXPORT_SYMBOL_GPL(spi_nor_scan);
-const struct spi_device_id *spi_nor_match_id(char *name)
+static const struct spi_device_id *spi_nor_match_id(const char *name)
{
const struct spi_device_id *id = spi_nor_ids;
@@ -1124,7 +1130,6 @@ const struct spi_device_id *spi_nor_match_id(char *name)
}
return NULL;
}
-EXPORT_SYMBOL_GPL(spi_nor_match_id);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Huang Shijie <shijie8@gmail.com>");
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index 9e6294f32ba8..a5a7a086748d 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -187,32 +187,18 @@ struct spi_nor {
/**
* spi_nor_scan() - scan the SPI NOR
* @nor: the spi_nor structure
- * @id: the spi_device_id provided by the driver
+ * @name: the chip type name
* @mode: the read mode supported by the driver
*
* The drivers can use this fuction to scan the SPI NOR.
* In the scanning, it will try to get all the necessary information to
* fill the mtd_info{} and the spi_nor{}.
*
- * The board may assigns a spi_device_id with @id which be used to compared with
- * the spi_device_id detected by the scanning.
+ * The chip type name can be provided through the @name parameter.
*
* Return: 0 for success, others for failure.
*/
-int spi_nor_scan(struct spi_nor *nor, const struct spi_device_id *id,
- enum read_mode mode);
+int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode);
extern const struct spi_device_id spi_nor_ids[];
-/**
- * spi_nor_match_id() - find the spi_device_id by the name
- * @name: the name of the spi_device_id
- *
- * The drivers use this function to find the spi_device_id
- * specified by the @name.
- *
- * Return: returns the right spi_device_id pointer on success,
- * and returns NULL on failure.
- */
-const struct spi_device_id *spi_nor_match_id(char *name);
-
#endif