[U-Boot] [PATCH 08/12] mtd: dataflash: Minor cleanups

Jagan Teki
2016-02-12T08:36:13Z

- rename spi_dataflash to mtd_dataflash
- fix single line comments
- remove unneeded spaces
- ascending order of include files
- rename spi_dataflash_* to dataflash_*
- rename SPI DATAFLASH to dataflash
- rename SPI DataFlash to dataflash
- return NULL replaced with error code

Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: York Sun <york.sun@nxp.com>
Cc: Haikun Wang <haikun.wang@freescale.com>
Signed-off-by: Jagan Teki <jteki@openedev.com>
---
drivers/mtd/spi-nor/sf_dataflash.c | 51 ++++++++++++++++----------------------
1 file changed, 22 insertions(+), 29 deletions(-)

diff --git a/drivers/mtd/spi-nor/sf_dataflash.c b/drivers/mtd/spi-nor/sf_dataflash.c
index 9943560..2a5f5ae 100644
--- a/drivers/mtd/spi-nor/sf_dataflash.c
+++ b/drivers/mtd/spi-nor/sf_dataflash.c
@@ -1,5 +1,4 @@
/*
- *
* Atmel DataFlash probing
*
* Copyright (C) 2016 Jagan Teki <jteki@openedev.com>
@@ -7,8 +6,10 @@
* Haikun Wang (haikun.wang at freescale.com)
*
* SPDX-License-Identifier: GPL-2.0+
-*/
+ */
+
#include <common.h>
+#include <div64.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
@@ -67,7 +68,6 @@
#define OP_WRITE_SECURITY_REVC 0x9A
#define OP_WRITE_SECURITY 0x9B /* revision D */

-
struct dataflash {
uint8_t command[16];

@@ -77,9 +77,7 @@ struct dataflash {
struct spi_slave *spi;
};

-/*
- * Return the status of the DataFlash device.
- */
+/* Return the status of the DataFlash device */
static inline int dataflash_status(struct spi_slave *spi)
{
int ret;
@@ -118,9 +116,7 @@ static int dataflash_waitready(struct spi_slave *spi)
return -ETIME;
}

-/*
- * Erase pages of flash.
- */
+/* Erase pages of flash */
static int dataflash_erase(struct mtd_info *mtd, struct erase_info *instr)
{
struct dataflash *priv = mtd->priv;
@@ -145,7 +141,7 @@ static int dataflash_erase(struct mtd_info *mtd, struct erase_info *instr)

status = spi_claim_bus(spi);
if (status) {
- debug("SPI DATAFLASH: unable to claim SPI bus\n");
+ debug("dataflash: unable to claim SPI bus\n");
return status;
}

@@ -231,7 +227,7 @@ static int dataflash_read(struct mtd_info *mtd, loff_t from, size_t len,

status = spi_claim_bus(spi);
if (status) {
- debug("SPI DATAFLASH: unable to claim SPI bus\n");
+ debug("dataflash: unable to claim SPI bus\n");
return status;
}

@@ -290,7 +286,7 @@ static int dataflash_write(struct mtd_info *mtd, loff_t to, size_t len,

status = spi_claim_bus(spi);
if (status) {
- debug("SPI DATAFLASH: unable to claim SPI bus\n");
+ debug("dataflash: unable to claim SPI bus\n");
return status;
}

@@ -387,7 +383,7 @@ static int dataflash_write(struct mtd_info *mtd, loff_t to, size_t len,

/* Check result of the compare operation */
if (status & (1 << 6)) {
- printf("SPI DataFlash: write compare page %u, err %d\n",
+ printf("dataflash: write compare page %u, err %d\n",
pageaddr, status);
remaining = 0;
status = -EIO;
@@ -551,7 +547,7 @@ static struct flash_info *jedec_probe(struct spi_slave *spi)
if (info->flags & SUP_POW2PS) {
status = dataflash_status(spi);
if (status < 0) {
- debug("SPI DataFlash: status error %d\n",
+ debug("dataflash: status error %d\n",
status);
return NULL;
}
@@ -573,10 +569,8 @@ static struct flash_info *jedec_probe(struct spi_slave *spi)
* size (it might be binary) even when we can tell which density
* class is involved (legacy chip id scheme).
*/
- printf("SPI DataFlash: Unsupported flash IDs: ");
- printf("manuf %02x, jedec %04x, ext_jedec %04x\n",
- id[0], jedec, id[3] << 8 | id[4]);
- return NULL;
+ printf("dataflash: JEDEC id %06x not handled\n", jedec);
+ return ERR_PTR(-ENODEV);
}

/*
@@ -593,7 +587,7 @@ static struct flash_info *jedec_probe(struct spi_slave *spi)
* AT45DB0642 64Mbit (8M) xx111xxx (0x3c) 8192 1056 11
* AT45DB1282 128Mbit (16M) xx0100xx (0x10) 16384 1056 11
*/
-static int spi_dataflash_probe(struct udevice *dev)
+static int dataflash_probe(struct udevice *dev)
{
struct spi_slave *spi = dev_get_parent_priv(dev);
struct flash_info *info;
@@ -621,19 +615,19 @@ static int spi_dataflash_probe(struct udevice *dev)
goto err_status;
}

- /*
+ /*
* Older chips support only legacy commands, identifing
* capacity using bits in the status byte.
*/
status = dataflash_status(spi);
if (status <= 0 || status == 0xff) {
- printf("SPI DataFlash: read status error %d\n", status);
+ printf("dataflash: read status error %d\n", status);
if (status == 0 || status == 0xff)
status = -ENODEV;
goto err_jedec_probe;
}

- /*
+ /*
* if there's a device there, assume it's dataflash.
* board setup should have set spi->max_speed_max to
* match f(car) for continuous reads, mode 0 or 3.
@@ -663,8 +657,7 @@ static int spi_dataflash_probe(struct udevice *dev)
break;
/* obsolete AT45DB1282 not (yet?) supported */
default:
- dev_info(&spi->dev, "unsupported device (%x)\n",
- status & 0x3c);
+ printf("dataflash: unsupported device (%x)\n", status & 0x3c);
status = -ENODEV;
goto err_status;
}
@@ -678,16 +671,16 @@ err_jedec_probe:
return status;
}

-static const struct udevice_id spi_dataflash_ids[] = {
+static const struct udevice_id dataflash_ids[] = {
{ .compatible = "atmel,at45", },
{ .compatible = "atmel,dataflash", },
{ }
};

-U_BOOT_DRIVER(spi_dataflash) = {
- .name = "spi_dataflash",
+U_BOOT_DRIVER(mtd_dataflash) = {
+ .name = "mtd_dataflash",
.id = UCLASS_MTD,
- .of_match = spi_dataflash_ids,
- .probe = spi_dataflash_probe,
+ .of_match = dataflash_ids,
+ .probe = dataflash_probe,
.priv_auto_alloc_size = sizeof(struct dataflash),
};
--
1.9.1