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soc: imx: imx8m-blk-ctrl: Defer probe if 'bus' genpd is not yet ready

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Depending of the boot sequence 'bus' genpd could be probed after imx8m-blk-ctrl
which led driver probe to fail. Change the returned error to allow
to defer the probe in this case.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Benjamin Gaignard 2022-09-19 14:13:02 +02:00 committed by Shawn Guo
parent 9abf2313ad
commit 1a1da28544
1 changed files with 8 additions and 3 deletions
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11
drivers/soc/imx/imx8m-blk-ctrl.c
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@ -210,9 +210,14 @@ static int imx8m_blk_ctrl_probe(struct platform_device *pdev)
return -ENOMEM;
bc->bus_power_dev = genpd_dev_pm_attach_by_name(dev, "bus");
if (IS_ERR(bc->bus_power_dev))
return dev_err_probe(dev, PTR_ERR(bc->bus_power_dev),
"failed to attach power domain \"bus\"\n");
if (IS_ERR(bc->bus_power_dev)) {
if (PTR_ERR(bc->bus_power_dev) == -ENODEV)
return dev_err_probe(dev, -EPROBE_DEFER,
"failed to attach power domain \"bus\"\n");
else
return dev_err_probe(dev, PTR_ERR(bc->bus_power_dev),
"failed to attach power domain \"bus\"\n");
}
for (i = 0; i < bc_data->num_domains; i++) {
const struct imx8m_blk_ctrl_domain_data *data = &bc_data->domains[i];