| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20190705095726.21433-5-niklas.cassel@linaro.org>
Date: Fri, 5 Jul 2019 11:57:15 +0200
From: Niklas Cassel <niklas.cassel@...aro.org>
To: Andy Gross <agross@...nel.org>, Ilia Lin <ilia.lin@...nel.org>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
Viresh Kumar <viresh.kumar@...aro.org>
Cc: linux-arm-msm@...r.kernel.org, jorge.ramirez-ortiz@...aro.org,
sboyd@...nel.org, vireshk@...nel.org, bjorn.andersson@...aro.org,
ulf.hansson@...aro.org, Niklas Cassel <niklas.cassel@...aro.org>,
linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 04/13] cpufreq: qcom: Refactor the driver to make it easier to extend
Refactor the driver to make it easier to extend in a later commit.
Create a driver struct to collect all common resources, in order to make
it easier to free up all common resources.
Create a driver match_data struct to make it easier to extend the driver
with support for new features that might only be supported on certain SoCs.
Co-developed-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>
Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>
Signed-off-by: Niklas Cassel <niklas.cassel@...aro.org>
---
Changes since RFC:
-Changed type of versions to u32 from u32*.
-Make the driver use a match_data struct, so that different SoC can have
different features.
-Fixed error handling.
drivers/cpufreq/qcom-cpufreq-nvmem.c | 123 +++++++++++++++++----------
1 file changed, 79 insertions(+), 44 deletions(-)
diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c
index fad6509eecb5..c0377b0eb2f4 100644
--- a/drivers/cpufreq/qcom-cpufreq-nvmem.c
+++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
@@ -43,6 +43,20 @@ enum _msm8996_version {
NUM_OF_MSM8996_VERSIONS,
};
+struct qcom_cpufreq_drv;
+
+struct qcom_cpufreq_match_data {
+ int (*get_version)(struct device *cpu_dev,
+ struct nvmem_cell *speedbin_nvmem,
+ struct qcom_cpufreq_drv *drv);
+};
+
+struct qcom_cpufreq_drv {
+ struct opp_table **opp_tables;
+ u32 versions;
+ const struct qcom_cpufreq_match_data *data;
+};
+
static struct platform_device *cpufreq_dt_pdev, *cpufreq_pdev;
static enum _msm8996_version qcom_cpufreq_get_msm_id(void)
@@ -76,7 +90,7 @@ static enum _msm8996_version qcom_cpufreq_get_msm_id(void)
static int qcom_cpufreq_kryo_name_version(struct device *cpu_dev,
struct nvmem_cell *speedbin_nvmem,
- u32 *versions)
+ struct qcom_cpufreq_drv *drv)
{
size_t len;
u8 *speedbin;
@@ -94,10 +108,10 @@ static int qcom_cpufreq_kryo_name_version(struct device *cpu_dev,
switch (msm8996_version) {
case MSM8996_V3:
- *versions = 1 << (unsigned int)(*speedbin);
+ drv->versions = 1 << (unsigned int)(*speedbin);
break;
case MSM8996_SG:
- *versions = 1 << ((unsigned int)(*speedbin) + 4);
+ drv->versions = 1 << ((unsigned int)(*speedbin) + 4);
break;
default:
BUG();
@@ -108,17 +122,17 @@ static int qcom_cpufreq_kryo_name_version(struct device *cpu_dev,
return 0;
}
+static const struct qcom_cpufreq_match_data match_data_kryo = {
+ .get_version = qcom_cpufreq_kryo_name_version,
+};
+
static int qcom_cpufreq_probe(struct platform_device *pdev)
{
- struct opp_table **opp_tables;
- int (*get_version)(struct device *cpu_dev,
- struct nvmem_cell *speedbin_nvmem,
- u32 *versions);
+ struct qcom_cpufreq_drv *drv;
struct nvmem_cell *speedbin_nvmem;
struct device_node *np;
struct device *cpu_dev;
unsigned cpu;
- u32 versions;
const struct of_device_id *match;
int ret;
@@ -126,11 +140,6 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
if (!cpu_dev)
return -ENODEV;
- match = pdev->dev.platform_data;
- get_version = match->data;
- if (!get_version)
- return -ENODEV;
-
np = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
if (!np)
return -ENOENT;
@@ -141,23 +150,43 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
return -ENOENT;
}
- speedbin_nvmem = of_nvmem_cell_get(np, NULL);
- of_node_put(np);
- if (IS_ERR(speedbin_nvmem)) {
- if (PTR_ERR(speedbin_nvmem) != -EPROBE_DEFER)
- dev_err(cpu_dev, "Could not get nvmem cell: %ld\n",
- PTR_ERR(speedbin_nvmem));
- return PTR_ERR(speedbin_nvmem);
+ drv = kzalloc(sizeof(*drv), GFP_KERNEL);
+ if (!drv)
+ return -ENOMEM;
+
+ match = pdev->dev.platform_data;
+ drv->data = match->data;
+ if (!drv->data) {
+ ret = -ENODEV;
+ goto free_drv;
}
- ret = get_version(cpu_dev, speedbin_nvmem, &versions);
- nvmem_cell_put(speedbin_nvmem);
- if (ret)
- return ret;
+ if (drv->data->get_version) {
+ speedbin_nvmem = of_nvmem_cell_get(np, NULL);
+ of_node_put(np);
+ if (IS_ERR(speedbin_nvmem)) {
+ if (PTR_ERR(speedbin_nvmem) != -EPROBE_DEFER)
+ dev_err(cpu_dev,
+ "Could not get nvmem cell: %ld\n",
+ PTR_ERR(speedbin_nvmem));
+ ret = PTR_ERR(speedbin_nvmem);
+ goto free_drv;
+ }
- opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables), GFP_KERNEL);
- if (!opp_tables)
- return -ENOMEM;
+ ret = drv->data->get_version(cpu_dev, speedbin_nvmem, drv);
+ if (ret) {
+ nvmem_cell_put(speedbin_nvmem);
+ goto free_drv;
+ }
+ nvmem_cell_put(speedbin_nvmem);
+ }
+
+ drv->opp_tables = kcalloc(num_possible_cpus(), sizeof(*drv->opp_tables),
+ GFP_KERNEL);
+ if (!drv->opp_tables) {
+ ret = -ENOMEM;
+ goto free_drv;
+ }
for_each_possible_cpu(cpu) {
cpu_dev = get_cpu_device(cpu);
@@ -166,19 +195,23 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
goto free_opp;
}
- opp_tables[cpu] = dev_pm_opp_set_supported_hw(cpu_dev,
- &versions, 1);
- if (IS_ERR(opp_tables[cpu])) {
- ret = PTR_ERR(opp_tables[cpu]);
- dev_err(cpu_dev, "Failed to set supported hardware\n");
- goto free_opp;
+ if (drv->data->get_version) {
+ drv->opp_tables[cpu] =
+ dev_pm_opp_set_supported_hw(cpu_dev,
+ &drv->versions, 1);
+ if (IS_ERR(drv->opp_tables[cpu])) {
+ ret = PTR_ERR(drv->opp_tables[cpu]);
+ dev_err(cpu_dev,
+ "Failed to set supported hardware\n");
+ goto free_opp;
+ }
}
}
cpufreq_dt_pdev = platform_device_register_simple("cpufreq-dt", -1,
NULL, 0);
if (!IS_ERR(cpufreq_dt_pdev)) {
- platform_set_drvdata(pdev, opp_tables);
+ platform_set_drvdata(pdev, drv);
return 0;
}
@@ -187,26 +220,30 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
free_opp:
for_each_possible_cpu(cpu) {
- if (IS_ERR_OR_NULL(opp_tables[cpu]))
+ if (IS_ERR_OR_NULL(drv->opp_tables[cpu]))
break;
- dev_pm_opp_put_supported_hw(opp_tables[cpu]);
+ dev_pm_opp_put_supported_hw(drv->opp_tables[cpu]);
}
- kfree(opp_tables);
+ kfree(drv->opp_tables);
+free_drv:
+ kfree(drv);
return ret;
}
static int qcom_cpufreq_remove(struct platform_device *pdev)
{
- struct opp_table **opp_tables = platform_get_drvdata(pdev);
+ struct qcom_cpufreq_drv *drv = platform_get_drvdata(pdev);
unsigned int cpu;
platform_device_unregister(cpufreq_dt_pdev);
for_each_possible_cpu(cpu)
- dev_pm_opp_put_supported_hw(opp_tables[cpu]);
+ if (drv->opp_tables[cpu])
+ dev_pm_opp_put_supported_hw(drv->opp_tables[cpu]);
- kfree(opp_tables);
+ kfree(drv->opp_tables);
+ kfree(drv);
return 0;
}
@@ -220,10 +257,8 @@ static struct platform_driver qcom_cpufreq_driver = {
};
static const struct of_device_id qcom_cpufreq_match_list[] __initconst = {
- { .compatible = "qcom,apq8096",
- .data = qcom_cpufreq_kryo_name_version },
- { .compatible = "qcom,msm8996",
- .data = qcom_cpufreq_kryo_name_version },
+ { .compatible = "qcom,apq8096", .data = &match_data_kryo },
+ { .compatible = "qcom,msm8996", .data = &match_data_kryo },
{},
};
--
2.21.0
Powered by blists - more mailing lists