From 89382022b370dfd34eaae9c863baa123fcd4d132 Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Sun, 14 May 2023 20:46:05 +0200
Subject: thermal/drivers/sun8i: Fix some error handling paths in
sun8i_ths_probe()
Should an error occur after calling sun8i_ths_resource_init() in the probe
function, some resources need to be released, as already done in the
.remove() function.
Switch to the devm_clk_get_enabled() helper and add a new devm_action to
turn sun8i_ths_resource_init() into a fully managed function.
Move the place where reset_control_deassert() is called so that the
recommended order of reset release/clock enable steps is kept.
A64 manual states that:
3.3.6.4. Gating and reset
Make sure that the reset signal has been released before the release of
module clock gating;
This fixes the issue and removes some LoC at the same time.
Fixes: dccc5c3b6f30 ("thermal/drivers/sun8i: Add thermal driver for H6/H5/H3/A64/A83T/R40")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/a8ae84bd2dc4b55fe428f8e20f31438bf8bb6762.1684089931.git.christophe.jaillet@wanadoo.fr
---
drivers/thermal/sun8i_thermal.c | 55 ++++++++++++++---------------------------
1 file changed, 18 insertions(+), 37 deletions(-)
(limited to 'drivers/thermal/sun8i_thermal.c')
diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
index 793ddce72132..d4d241686c81 100644
--- a/drivers/thermal/sun8i_thermal.c
+++ b/drivers/thermal/sun8i_thermal.c
@@ -319,6 +319,11 @@ out:
return ret;
}
+static void sun8i_ths_reset_control_assert(void *data)
+{
+ reset_control_assert(data);
+}
+
static int sun8i_ths_resource_init(struct ths_device *tmdev)
{
struct device *dev = tmdev->dev;
@@ -339,47 +344,35 @@ static int sun8i_ths_resource_init(struct ths_device *tmdev)
if (IS_ERR(tmdev->reset))
return PTR_ERR(tmdev->reset);
- tmdev->bus_clk = devm_clk_get(&pdev->dev, "bus");
+ ret = reset_control_deassert(tmdev->reset);
+ if (ret)
+ return ret;
+
+ ret = devm_add_action_or_reset(dev, sun8i_ths_reset_control_assert,
+ tmdev->reset);
+ if (ret)
+ return ret;
+
+ tmdev->bus_clk = devm_clk_get_enabled(&pdev->dev, "bus");
if (IS_ERR(tmdev->bus_clk))
return PTR_ERR(tmdev->bus_clk);
}
if (tmdev->chip->has_mod_clk) {
- tmdev->mod_clk = devm_clk_get(&pdev->dev, "mod");
+ tmdev->mod_clk = devm_clk_get_enabled(&pdev->dev, "mod");
if (IS_ERR(tmdev->mod_clk))
return PTR_ERR(tmdev->mod_clk);
}
- ret = reset_control_deassert(tmdev->reset);
- if (ret)
- return ret;
-
- ret = clk_prepare_enable(tmdev->bus_clk);
- if (ret)
- goto assert_reset;
-
ret = clk_set_rate(tmdev->mod_clk, 24000000);
if (ret)
- goto bus_disable;
-
- ret = clk_prepare_enable(tmdev->mod_clk);
- if (ret)
- goto bus_disable;
+ return ret;
ret = sun8i_ths_calibrate(tmdev);
if (ret)
- goto mod_disable;
+ return ret;
return 0;
-
-mod_disable:
- clk_disable_unprepare(tmdev->mod_clk);
-bus_disable:
- clk_disable_unprepare(tmdev->bus_clk);
-assert_reset:
- reset_control_assert(tmdev->reset);
-
- return ret;
}
static int sun8i_h3_thermal_init(struct ths_device *tmdev)
@@ -530,17 +523,6 @@ static int sun8i_ths_probe(struct platform_device *pdev)
return 0;
}
-static int sun8i_ths_remove(struct platform_device *pdev)
-{
- struct ths_device *tmdev = platform_get_drvdata(pdev);
-
- clk_disable_unprepare(tmdev->mod_clk);
- clk_disable_unprepare(tmdev->bus_clk);
- reset_control_assert(tmdev->reset);
-
- return 0;
-}
-
static const struct ths_thermal_chip sun8i_a83t_ths = {
.sensor_num = 3,
.scale = 705,
@@ -642,7 +624,6 @@ MODULE_DEVICE_TABLE(of, of_ths_match);
static struct platform_driver ths_driver = {
.probe = sun8i_ths_probe,
- .remove = sun8i_ths_remove,
.driver = {
.name = "sun8i-thermal",
.of_match_table = of_ths_match,
--
cgit
From 07130d1da81138bd15b6b25cb8527a8191c73033 Mon Sep 17 00:00:00 2001
From: Yangtao Li <frank.li@vivo.com>
Date: Tue, 20 Jun 2023 17:07:23 +0800
Subject: thermal/drivers/sun8i: Remove redundant msg in sun8i_ths_register()
The upper-layer devm_thermal_add_hwmon_sysfs() function can directly
print error information.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230620090732.50025-2-frank.li@vivo.com
---
drivers/thermal/sun8i_thermal.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
(limited to 'drivers/thermal/sun8i_thermal.c')
diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
index d4d241686c81..195f3c5d0b38 100644
--- a/drivers/thermal/sun8i_thermal.c
+++ b/drivers/thermal/sun8i_thermal.c
@@ -468,9 +468,7 @@ static int sun8i_ths_register(struct ths_device *tmdev)
if (IS_ERR(tmdev->sensor[i].tzd))
return PTR_ERR(tmdev->sensor[i].tzd);
- if (devm_thermal_add_hwmon_sysfs(tmdev->dev, tmdev->sensor[i].tzd))
- dev_warn(tmdev->dev,
- "Failed to add hwmon sysfs attributes\n");
+ devm_thermal_add_hwmon_sysfs(tmdev->dev, tmdev->sensor[i].tzd);
}
return 0;
--
cgit