of: use 'const void *' for struct of_device_id.data

Since 2011 barebox' of_device_id struct uses unsigned long type for data field:

    struct of_device_id {
            char *compatible;
            unsigned long data;
    };

Almost always struct of_device_id.data field are used as pointer
and need 'unsigned long' casting.

E.g. see 'git grep -A 4 of_device_id drivers/' output:

    drivers/ata/sata-imx.c:static __maybe_unused struct of_device_id imx_sata_dt_ids[] = {
    drivers/ata/sata-imx.c- {
    drivers/ata/sata-imx.c-         .compatible = "fsl,imx6q-ahci",
    drivers/ata/sata-imx.c-         .data = (unsigned long)&data_imx6,
    drivers/ata/sata-imx.c- }, {

Here is of_device_id struct in linux kernel v4.0:

    struct of_device_id {
            char name[32];
            char type[32];
            char compatible[128];
            const void *data;
    };

Changing of_device_id.data type to 'const void *data' will increase
barebox' linux kernel compatibility and decrease number of 'unsigned
long' casts.

Part of the patch was done using the 'coccinelle' tool with the
following semantic patch:

    @rule1@
    identifier dev;
    identifier type;
    identifier func;
    @@
    func(...) {
    <...
    - dev_get_drvdata(dev, (unsigned long *)&type)
    + dev_get_drvdata(dev, (const void **)&type)
    ...>
    }
    @rule2@
    identifier dev;
    identifier type;
    identifier func;
    identifier data;
    @@
    func(...) {
    <...
    - dev_get_drvdata(dev, (unsigned long *)&type->data)
    + dev_get_drvdata(dev, (const void **)&type->data)
    ...>
    }

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/pci/pci-tegra.c b/drivers/pci/pci-tegra.c
index 1e7907e5b1..b532c464a6 100644
--- a/drivers/pci/pci-tegra.c
+++ b/drivers/pci/pci-tegra.c
@@ -1239,13 +1239,13 @@ static const struct tegra_pcie_soc_data tegra124_pcie_data = {
 static __maybe_unused struct of_device_id tegra_pcie_of_match[] = {
 	{
 		.compatible = "nvidia,tegra124-pcie",
-		.data = (unsigned long)&tegra124_pcie_data
+		.data = &tegra124_pcie_data
 	}, {
 		.compatible = "nvidia,tegra30-pcie",
-		.data = (unsigned long)&tegra30_pcie_data
+		.data = &tegra30_pcie_data
 	}, {
 		.compatible = "nvidia,tegra20-pcie",
-		.data = (unsigned long)&tegra20_pcie_data
+		.data = &tegra20_pcie_data
 	}, {
 		/* sentinel */
 	},
@@ -1262,7 +1262,7 @@ static int tegra_pcie_probe(struct device_d *dev)
 
 	INIT_LIST_HEAD(&pcie->buses);
 	INIT_LIST_HEAD(&pcie->ports);
-	dev_get_drvdata(dev, (unsigned long *)&pcie->soc_data);
+	dev_get_drvdata(dev, (const void **)&pcie->soc_data);
 	pcie->dev = dev;
 
 	err = tegra_pcie_parse_dt(pcie);