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authorEdward A. James <eajames@us.ibm.com>2017-07-20 09:55:32 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-08-28 17:15:16 +0200
commit47a6623b2d678bc5ce6d3fefbb26b4392bec4929 (patch)
treedab102b3b4728e546302237abc33612311eb5cb0 /drivers/fsi
parent061c0958de2e5994c81991852f5a33ffe9da810a (diff)
downloadlinux-47a6623b2d678bc5ce6d3fefbb26b4392bec4929.tar.bz2
drivers/fsi/scom: Remove reset before every putscom
Reset causes problems for operations requiring multiple scoms (e.g. i2c over scom). Instead, reset scom engine during probe. Signed-off-by: Edward A. James <eajames@us.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fsi')
-rw-r--r--drivers/fsi/fsi-scom.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/fsi/fsi-scom.c b/drivers/fsi/fsi-scom.c
index 98d062fd353e..e13353a2fd7c 100644
--- a/drivers/fsi/fsi-scom.c
+++ b/drivers/fsi/fsi-scom.c
@@ -57,12 +57,6 @@ static int put_scom(struct scom_device *scom_dev, uint64_t value,
int rc;
uint32_t data;
- data = cpu_to_be32(SCOM_RESET_CMD);
- rc = fsi_device_write(scom_dev->fsi_dev, SCOM_RESET_REG, &data,
- sizeof(uint32_t));
- if (rc)
- return rc;
-
data = cpu_to_be32((value >> 32) & 0xffffffff);
rc = fsi_device_write(scom_dev->fsi_dev, SCOM_DATA0_REG, &data,
sizeof(uint32_t));
@@ -186,6 +180,7 @@ static const struct file_operations scom_fops = {
static int scom_probe(struct device *dev)
{
+ uint32_t data;
struct fsi_device *fsi_dev = to_fsi_dev(dev);
struct scom_device *scom;
@@ -202,6 +197,9 @@ static int scom_probe(struct device *dev)
scom->mdev.parent = dev;
list_add(&scom->link, &scom_devices);
+ data = cpu_to_be32(SCOM_RESET_CMD);
+ fsi_device_write(fsi_dev, SCOM_RESET_REG, &data, sizeof(uint32_t));
+
return misc_register(&scom->mdev);
}