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authorPhilipp Zabel <p.zabel@pengutronix.de>2014-05-14 20:02:23 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-05-17 03:32:15 +0400
commitf8269c19222550dd357e515673f628071880d64c (patch)
tree265159658442e42a23a28952651eb601f8965523 /drivers/cpufreq/imx6q-cpufreq.c
parente54173b4ed0fca1a5dce9911f54e71f2917d4869 (diff)
downloadlinux-f8269c19222550dd357e515673f628071880d64c.tar.xz
cpufreq: imx6q: Drop devm_clk/regulator_get usage
This driver is using devres managed calls incorrectly, giving the cpu0 device as first parameter instead of the cpufreq platform device. This results in resources not being freed if the cpufreq platform device is unbound, for example if probing has to be deferred for a missing regulator. Supporting probe deferral properly is a prerequisite to enabling the internal LDO bypass on i.MX6 and regulating the CPU voltage with an external regulator. Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/imx6q-cpufreq.c')
-rw-r--r--drivers/cpufreq/imx6q-cpufreq.c53
1 files changed, 39 insertions, 14 deletions
diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c
index e27fca86fe4f..92a82ec763c6 100644
--- a/drivers/cpufreq/imx6q-cpufreq.c
+++ b/drivers/cpufreq/imx6q-cpufreq.c
@@ -170,25 +170,25 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
return -ENOENT;
}
- arm_clk = devm_clk_get(cpu_dev, "arm");
- pll1_sys_clk = devm_clk_get(cpu_dev, "pll1_sys");
- pll1_sw_clk = devm_clk_get(cpu_dev, "pll1_sw");
- step_clk = devm_clk_get(cpu_dev, "step");
- pll2_pfd2_396m_clk = devm_clk_get(cpu_dev, "pll2_pfd2_396m");
+ arm_clk = clk_get(cpu_dev, "arm");
+ pll1_sys_clk = clk_get(cpu_dev, "pll1_sys");
+ pll1_sw_clk = clk_get(cpu_dev, "pll1_sw");
+ step_clk = clk_get(cpu_dev, "step");
+ pll2_pfd2_396m_clk = clk_get(cpu_dev, "pll2_pfd2_396m");
if (IS_ERR(arm_clk) || IS_ERR(pll1_sys_clk) || IS_ERR(pll1_sw_clk) ||
IS_ERR(step_clk) || IS_ERR(pll2_pfd2_396m_clk)) {
dev_err(cpu_dev, "failed to get clocks\n");
ret = -ENOENT;
- goto put_node;
+ goto put_clk;
}
- arm_reg = devm_regulator_get(cpu_dev, "arm");
- pu_reg = devm_regulator_get(cpu_dev, "pu");
- soc_reg = devm_regulator_get(cpu_dev, "soc");
+ arm_reg = regulator_get(cpu_dev, "arm");
+ pu_reg = regulator_get(cpu_dev, "pu");
+ soc_reg = regulator_get(cpu_dev, "soc");
if (IS_ERR(arm_reg) || IS_ERR(pu_reg) || IS_ERR(soc_reg)) {
dev_err(cpu_dev, "failed to get regulators\n");
ret = -ENOENT;
- goto put_node;
+ goto put_reg;
}
/*
@@ -201,21 +201,21 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
ret = of_init_opp_table(cpu_dev);
if (ret < 0) {
dev_err(cpu_dev, "failed to init OPP table: %d\n", ret);
- goto put_node;
+ goto put_reg;
}
num = dev_pm_opp_get_opp_count(cpu_dev);
if (num < 0) {
ret = num;
dev_err(cpu_dev, "no OPP table is found: %d\n", ret);
- goto put_node;
+ goto put_reg;
}
}
ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table);
if (ret) {
dev_err(cpu_dev, "failed to init cpufreq table: %d\n", ret);
- goto put_node;
+ goto put_reg;
}
/* Make imx6_soc_volt array's size same as arm opp number */
@@ -301,7 +301,24 @@ soc_opp_out:
free_freq_table:
dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table);
-put_node:
+put_reg:
+ if (!IS_ERR(arm_reg))
+ regulator_put(arm_reg);
+ if (!IS_ERR(pu_reg))
+ regulator_put(pu_reg);
+ if (!IS_ERR(soc_reg))
+ regulator_put(soc_reg);
+put_clk:
+ if (!IS_ERR(arm_clk))
+ clk_put(arm_clk);
+ if (!IS_ERR(pll1_sys_clk))
+ clk_put(pll1_sys_clk);
+ if (!IS_ERR(pll1_sw_clk))
+ clk_put(pll1_sw_clk);
+ if (!IS_ERR(step_clk))
+ clk_put(step_clk);
+ if (!IS_ERR(pll2_pfd2_396m_clk))
+ clk_put(pll2_pfd2_396m_clk);
of_node_put(np);
return ret;
}
@@ -310,6 +327,14 @@ static int imx6q_cpufreq_remove(struct platform_device *pdev)
{
cpufreq_unregister_driver(&imx6q_cpufreq_driver);
dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table);
+ regulator_put(arm_reg);
+ regulator_put(pu_reg);
+ regulator_put(soc_reg);
+ clk_put(arm_clk);
+ clk_put(pll1_sys_clk);
+ clk_put(pll1_sw_clk);
+ clk_put(step_clk);
+ clk_put(pll2_pfd2_396m_clk);
return 0;
}