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@xxxxxxxxxxxxxxx>
---
drivers/mtd/devices/m25p80.c | 6 +-----
drivers/mtd/spi-nor/fsl-quadspi.c | 7 +------
drivers/mtd/spi-nor/spi-nor.c | 29 +++++++++++++----------------
include/linux/mtd/spi-nor.h | 21 ++++-----------------
4 files changed, 19 insertions(+), 44 deletions(-)
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 3f0fe86..b547c39 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -196,7 +196,6 @@ static int m25p_probe(struct spi_device *spi)
struct m25p *flash;
struct spi_nor *nor;
enum read_mode mode = SPI_NOR_NORMAL;
- const struct spi_device_id *id;
int ret;
flash = devm_kzalloc(&spi->dev, sizeof(*flash), GFP_KERNEL);
@@ -224,10 +223,7 @@ static int m25p_probe(struct spi_device *spi)
mode = SPI_NOR_QUAD;
else if (spi->mode & SPI_RX_DUAL)
mode = SPI_NOR_DUAL;
- id = spi_nor_match_id(spi_get_device_id(spi)->name);
- if (WARN_ON(!id))
- return -ENODEV;
- ret = spi_nor_scan(nor, id, mode);
+ ret = spi_nor_scan(nor, spi_get_device_id(spi)->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 8d659a2..d5269a2 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 6f699c5..40d6f70 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.
@@ -908,9 +910,9 @@ 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 flash_platform_data *data;
struct device *dev = nor->dev;
@@ -930,21 +932,17 @@ int spi_nor_scan(struct spi_nor *nor, const struct spi_device_id *id,
*/
data = dev_get_platdata(dev);
if (data && data->type) {
- const struct spi_device_id *plat_id;
-
- for (i = 0; i < ARRAY_SIZE(spi_nor_ids) - 1; i++) {
- plat_id = &spi_nor_ids[i];
- if (strcmp(data->type, plat_id->name))
- continue;
- break;
- }
-
- if (i < ARRAY_SIZE(spi_nor_ids) - 1)
- id = plat_id;
- else
+ id = spi_nor_match_id(data->type);
+ if (!id)
dev_warn(dev, "unrecognized id %s\n", data->type);
}
+ if (!id && name)
+ id = spi_nor_match_id(name);
+
+ if (!id)
+ return -ENODEV;
+
info = (void *)id->driver_data;
if (info->jedec_id) {
@@ -1133,7 +1131,7 @@ 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(const char *name)
+static const struct spi_device_id *spi_nor_match_id(const char *name)
{
const struct spi_device_id *id = spi_nor_ids;
@@ -1144,7 +1142,6 @@ const struct spi_device_id *spi_nor_match_id(const char *name)
}
return NULL;
}
-EXPORT_SYMBOL_GPL(spi_nor_match_id);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Huang Shijie <shijie8@xxxxxxxxx>");
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index 66af67a..6f92b4b 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -184,31 +184,18 @@ 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 either through platform data or
+ * through the @name parameter. Platform data takes precedence.
*
* 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);
-
-/**
- * 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(const char *name);
+int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode);
#endif
--
Ben Hutchings
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