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authorAlessandro Rubini <rubini@gnudd.com>2014-02-22 09:11:12 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-02-28 15:12:08 -0800
commit5c9a87367daf292244bd9bb3e67516dfa0027516 (patch)
treec62996f9f46349aa3dfb86330ae7ec45ae2e0ad9 /drivers/fmc
parentdd97b2410e70d881a362e5b31b702f59c21e0da6 (diff)
downloadkernel-5c9a87367daf292244bd9bb3e67516dfa0027516.tar.gz
FMC: make eeprom attribute writable
This allows easier modification to the eeprom than loading the fmc-write-eeprom module. The carrier driver will refuse writing if the FPGA is not running the golden gateware image, so writing in practice is only available at manufacture/development time. Signed-off-by: Alessandro Rubini <rubini@gnudd.com> Acked-by: Juan David Gonzalez Cobas <dcobas@cern.ch> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fmc')
-rw-r--r--drivers/fmc/fmc-core.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/fmc/fmc-core.c b/drivers/fmc/fmc-core.c
index 5a5e616c6324..353fc546fb08 100644
--- a/drivers/fmc/fmc-core.c
+++ b/drivers/fmc/fmc-core.c
@@ -99,10 +99,23 @@ static ssize_t fmc_read_eeprom(struct file *file, struct kobject *kobj,
return count;
}
+static ssize_t fmc_write_eeprom(struct file *file, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ struct device *dev;
+ struct fmc_device *fmc;
+
+ dev = container_of(kobj, struct device, kobj);
+ fmc = container_of(dev, struct fmc_device, dev);
+ return fmc->op->write_ee(fmc, off, buf, count);
+}
+
static struct bin_attribute fmc_eeprom_attr = {
- .attr = { .name = "eeprom", .mode = S_IRUGO, },
+ .attr = { .name = "eeprom", .mode = S_IRUGO | S_IWUSR, },
.size = 8192, /* more or less standard */
.read = fmc_read_eeprom,
+ .write = fmc_write_eeprom,
};
/*