We are currently probing smartreflex with omap_device while we are
already probing smartreflex related interconnect target module with
ti-sysc driver and dts data.
Before we can flip things on for ti-sysc, we need to prepare the
smartreflex driver a bit:
1. The smartreflex clock is really for the whole interconnect target
module. So it may be configured at the parent device level with
ti-sysc
2. With ti-sysc, we have the child device manage interconnect target
module directly if pm_runtime_irq_safe() is set and there is only
one child. In that case nobody else is going to call pm_runtime_get
and put, so we need to add these calls to idle smartreflex properly
after probe if not fully configured
3. With ti-sysc, the parent driver may rebind. So we want to use
platform_driver_register() and don't want probe to be __init
Note that this patch depends on the related changes to ti-sysc driver
and omap_device probing to prevent both ti-sysc and omap_device to
try to probe smartreflex.
Cc: linux...@vger.kernel.org
Cc: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Signed-off-by: Tony Lindgren <t...@atomide.com>
---
drivers/power/avs/smartreflex.c | 41 ++++++++++++++++++++++++++++++++++-------
1 file changed, 34 insertions(+), 7 deletions(-)
diff --git a/drivers/power/avs/smartreflex.c b/drivers/power/avs/smartreflex.c
--- a/drivers/power/avs/smartreflex.c
+++ b/drivers/power/avs/smartreflex.c
@@ -132,12 +132,16 @@ static void sr_set_clk_length(struct omap_sr *sr)
struct clk *fck;
u32 fclk_speed;
- fck = clk_get(&sr->pdev->dev, "fck");
-
+ /* Try interconnect target module fck first if it already exists */
+ fck = clk_get(sr->pdev->dev.parent, "fck");
if (IS_ERR(fck)) {
- dev_err(&sr->pdev->dev, "%s: unable to get fck for device %s\n",
- __func__, dev_name(&sr->pdev->dev));
- return;
+ fck = clk_get(&sr->pdev->dev, "fck");
+ if (IS_ERR(fck)) {
+ dev_err(&sr->pdev->dev,
+ "%s: unable to get fck for device %s\n",
+ __func__, dev_name(&sr->pdev->dev));
+ return;
+ }
}
fclk_speed = clk_get_rate(fck);
@@ -838,7 +842,7 @@ static int omap_sr_autocomp_store(void *data, u64 val)
DEFINE_SIMPLE_ATTRIBUTE(pm_sr_fops, omap_sr_autocomp_show,
omap_sr_autocomp_store, "%llu\n");
-static int __init omap_sr_probe(struct platform_device *pdev)
+static int omap_sr_probe(struct platform_device *pdev)
{
struct omap_sr *sr_info;
struct omap_sr_data *pdata = pdev->dev.platform_data;
@@ -898,6 +902,12 @@ static int __init omap_sr_probe(struct platform_device
*pdev)
list_add(&sr_info->node, &sr_list);
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(&pdev->dev);
+ goto err_list_del;
+ }
+
/*
* Call into late init to do initializations that require
* both sr driver and sr class driver to be initiallized.
@@ -966,12 +976,17 @@ static int __init omap_sr_probe(struct platform_device
*pdev)
}
+ pm_runtime_put_sync(&pdev->dev);
+
return ret;
err_debugfs:
debugfs_remove_recursive(sr_info->dbg_dir);
err_list_del:
list_del(&sr_info->node);
+
+ pm_runtime_put_sync(&pdev->dev);
+
return ret;
}
@@ -1025,11 +1040,23 @@ static void omap_sr_shutdown(struct platform_device
*pdev)
return;
}
+static const struct of_device_id omap_sr_match[] = {
+ { .compatible = "ti,omap3-smartreflex-core", },
+ { .compatible = "ti,omap3-smartreflex-mpu-iva", },
+ { .compatible = "ti,omap4-smartreflex-core", },
+ { .compatible = "ti,omap4-smartreflex-mpu", },
+ { .compatible = "ti,omap4-smartreflex-iva", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, omap_sr_match);
+
static struct platform_driver smartreflex_driver = {
+ .probe = omap_sr_probe,
.remove = omap_sr_remove,
.shutdown = omap_sr_shutdown,
.driver = {
.name = DRIVER_NAME,
+ .of_match_table = omap_sr_match,
},
};
@@ -1048,7 +1075,7 @@ static int __init sr_init(void)
else
pr_warn("%s: No PMIC hook to init smartreflex\n", __func__);
- ret = platform_driver_probe(&smartreflex_driver, omap_sr_probe);
+ ret = platform_driver_register(&smartreflex_driver);
if (ret) {
pr_err("%s: platform driver register failed for SR\n",
__func__);
--
2.16.2
