Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.14 116/496] soc: imx: gpc: de-register power domains only if initialized | Date | Mon, 28 May 2018 11:58:21 +0200 |
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4.14-stable review patch. If anyone has any objections, please let me know.
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From: Stefan Agner <stefan@agner.ch>
[ Upstream commit 7801c545e706674aeed40256eb806ad37b18ad71 ]
If power domain information are missing in the device tree, no power domains get initialized. However, imx_gpc_remove tries to remove power domains always in the old DT binding case. Only remove power domains when imx_gpc_probe initialized them in first place.
Fixes: 721cabf6c660 ("soc: imx: move PGC handling to a new GPC driver") Signed-off-by: Stefan Agner <stefan@agner.ch> Reviewed-by: Lucas Stach <l.stach@pengutronix.de> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/soc/imx/gpc.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
--- a/drivers/soc/imx/gpc.c +++ b/drivers/soc/imx/gpc.c @@ -456,13 +456,21 @@ static int imx_gpc_probe(struct platform static int imx_gpc_remove(struct platform_device *pdev) { + struct device_node *pgc_node; int ret; + pgc_node = of_get_child_by_name(pdev->dev.of_node, "pgc"); + + /* bail out if DT too old and doesn't provide the necessary info */ + if (!of_property_read_bool(pdev->dev.of_node, "#power-domain-cells") && + !pgc_node) + return 0; + /* * If the old DT binding is used the toplevel driver needs to * de-register the power domains */ - if (!of_get_child_by_name(pdev->dev.of_node, "pgc")) { + if (!pgc_node) { of_genpd_del_provider(pdev->dev.of_node); ret = pm_genpd_remove(&imx_gpc_domains[GPC_PGC_DOMAIN_PU].base);
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