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author | Heiner Kallweit <hkallweit1@gmail.com> | 2017-09-29 23:44:05 +0200 |
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committer | Sudeep Holla <sudeep.holla@arm.com> | 2017-10-04 11:09:46 +0100 |
commit | 931cf0c53e6999375eac65f3650a656b88634b9d (patch) | |
tree | 1133bda2d05adc797fe1959a8e8fc8dbceaf7498 /drivers/firmware | |
parent | cfe8a9c9aaf47af3d9e6fe4c4b03f4a88844746d (diff) | |
download | linux-stable-931cf0c53e6999375eac65f3650a656b88634b9d.tar.gz linux-stable-931cf0c53e6999375eac65f3650a656b88634b9d.tar.bz2 linux-stable-931cf0c53e6999375eac65f3650a656b88634b9d.zip |
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>
Diffstat (limited to 'drivers/firmware')
-rw-r--r-- | drivers/firmware/arm_scpi.c | 48 |
1 files changed, 26 insertions, 22 deletions
diff --git a/drivers/firmware/arm_scpi.c b/drivers/firmware/arm_scpi.c index b99af7af64ff..97a22a73c2d2 100644 --- a/drivers/firmware/arm_scpi.c +++ b/drivers/firmware/arm_scpi.c @@ -645,34 +645,34 @@ 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) |