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firmware: arm_scpi: pre-populate dvfs info in scpi_probe 

Pre-populating the dvfs info data in scpi_probe allows to make all
memory allocations device-managed. This helps to simplify scpi_remove
and eventually to get rid of scpi_remove completely.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
[sudeep.holla: changed to continue probe even if scpi_dvfs_populate_info fails]
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Heiner Kallweit 2017-09-29 23:44:05 +02:00 committed by Sudeep Holla
parent cfe8a9c9aa
commit 931cf0c53e
1 changed files with 26 additions and 22 deletions
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48
drivers/firmware/arm_scpi.c
View File

@ -644,35 +644,35 @@ static int opp_cmp_func(const void *opp1, const void *opp2)
}
static struct scpi_dvfs_info *scpi_dvfs_get_info(u8 domain)
{
if (domain >= MAX_DVFS_DOMAINS)
return ERR_PTR(-EINVAL);
return scpi_info->dvfs[domain] ?: ERR_PTR(-EINVAL);
}
static int scpi_dvfs_populate_info(struct device *dev, u8 domain)
{
struct scpi_dvfs_info *info;
struct scpi_opp *opp;
struct dvfs_info buf;
int ret, i;
if (domain >= MAX_DVFS_DOMAINS)
return ERR_PTR(-EINVAL);
if (scpi_info->dvfs[domain]) /* data already populated */
return scpi_info->dvfs[domain];
ret = scpi_send_message(CMD_GET_DVFS_INFO, &domain, sizeof(domain),
&buf, sizeof(buf));
if (ret)
return ERR_PTR(ret);
return ret;
info = kmalloc(sizeof(*info), GFP_KERNEL);
info = devm_kmalloc(dev, sizeof(*info), GFP_KERNEL);
if (!info)
return ERR_PTR(-ENOMEM);
return -ENOMEM;
info->count = DVFS_OPP_COUNT(buf.header);
info->latency = DVFS_LATENCY(buf.header) * 1000; /* uS to nS */
info->opps = kcalloc(info->count, sizeof(*opp), GFP_KERNEL);
if (!info->opps) {
kfree(info);
return ERR_PTR(-ENOMEM);
}
info->opps = devm_kcalloc(dev, info->count, sizeof(*opp), GFP_KERNEL);
if (!info->opps)
return -ENOMEM;
for (i = 0, opp = info->opps; i < info->count; i++, opp++) {
opp->freq = le32_to_cpu(buf.opps[i].freq);
@ -682,7 +682,15 @@ static struct scpi_dvfs_info *scpi_dvfs_get_info(u8 domain)
sort(info->opps, info->count, sizeof(*opp), opp_cmp_func, NULL);
scpi_info->dvfs[domain] = info;
return info;
return 0;
}
static void scpi_dvfs_populate(struct device *dev)
{
int domain;
for (domain = 0; domain < MAX_DVFS_DOMAINS; domain++)
scpi_dvfs_populate_info(dev, domain);
}
static int scpi_dev_domain_id(struct device *dev)
@ -899,18 +907,12 @@ scpi_free_channels(struct device *dev, struct scpi_chan *pchan, int count)
static int scpi_remove(struct platform_device *pdev)
{
int i;
struct device *dev = &pdev->dev;
of_platform_depopulate(dev);
sysfs_remove_groups(&dev->kobj, versions_groups);
scpi_free_channels(dev, scpi_info->channels, scpi_info->num_chans);
for (i = 0; i < MAX_DVFS_DOMAINS && scpi_info->dvfs[i]; i++) {
kfree(scpi_info->dvfs[i]->opps);
kfree(scpi_info->dvfs[i]);
}
return 0;
}
@ -1016,6 +1018,7 @@ err:
scpi_info->channels = scpi_chan;
scpi_info->num_chans = count;
scpi_info->commands = scpi_std_commands;
scpi_info->scpi_ops = &scpi_ops;
if (scpi_info->is_legacy) {
/* Replace with legacy variants */
@ -1035,13 +1038,14 @@ err:
return ret;
}
scpi_dvfs_populate(dev);
_dev_info(dev, "SCP Protocol %d.%d Firmware %d.%d.%d version\n",
PROTOCOL_REV_MAJOR(scpi_info->protocol_version),
PROTOCOL_REV_MINOR(scpi_info->protocol_version),
FW_REV_MAJOR(scpi_info->firmware_version),
FW_REV_MINOR(scpi_info->firmware_version),
FW_REV_PATCH(scpi_info->firmware_version));
scpi_info->scpi_ops = &scpi_ops;
ret = sysfs_create_groups(&dev->kobj, versions_groups);
if (ret)