Re: [PATCH] drivers: bus: simple-pm-bus: Fix compability with simple-bus for auxdata

After converting am335x to probe devices with simple-pm-bus I noticed
that we are not passing auxdata for of_platform_populate() like we do
with simple-bus.

While device tree using SoCs should no longer need platform data, there
are still quite a few drivers that still need it.

Let's fix the issue by passing auxdata as platform data to simple-pm-bus.
That way the SoCs needing this can pass the auxdata with OF_DEV_AUXDATA.
And let's pass the auxdata for omaps to fix the issue for am335x.

Later on we may want to consider handling simple-pm-bus directly in
drivers/of/platform.c as then we no longer need the platform data for
simple-pm-bus.

Fixes: 5a230524f879 ("ARM: dts: Use simple-pm-bus for genpd for am3 l4_wkup")
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 arch/arm/mach-omap2/pdata-quirks.c | 1 +
 drivers/bus/simple-pm-bus.c        | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c
--- a/arch/arm/mach-omap2/pdata-quirks.c
+++ b/arch/arm/mach-omap2/pdata-quirks.c

@@ -532,6 +532,7 @@ static struct of_dev_auxdata omap_auxdata_lookup[] = {
                       &dra7_ipu1_dsp_iommu_pdata),
 #endif
        /* Common auxdata */
+       OF_DEV_AUXDATA("simple-pm-bus", 0, NULL, omap_auxdata_lookup),
        OF_DEV_AUXDATA("ti,sysc", 0, NULL, &ti_sysc_pdata),
        OF_DEV_AUXDATA("pinctrl-single", 0, NULL, &pcs_pdata),
        OF_DEV_AUXDATA("ti,omap-prm-inst", 0, NULL, &ti_prm_pdata),

diff --git a/drivers/bus/simple-pm-bus.c b/drivers/bus/simple-pm-bus.c
--- a/drivers/bus/simple-pm-bus.c
+++ b/drivers/bus/simple-pm-bus.c

@@ -16,6 +16,7 @@

 static int simple_pm_bus_probe(struct platform_device *pdev)
 {
+       const struct of_dev_auxdata *lookup = dev_get_platdata(&pdev->dev);
        struct device_node *np = pdev->dev.of_node;

        dev_dbg(&pdev->dev, "%s\n", __func__);

@@ -23,7 +24,7 @@ static int simple_pm_bus_probe(struct platform_device *pdev)
        pm_runtime_enable(&pdev->dev);

        if (np)
-               of_platform_populate(np, NULL, NULL, &pdev->dev);
+               of_platform_populate(np, NULL, lookup, &pdev->dev);

        return 0;
 }
--

2.30.0