[PATCH v4 4/5] memory: tegra186: Register as memory controller

Thierry Reding
2020-02-13T16:40:20Z

Registering as memory controller allows other drivers to obtain a
reference to it. This is mostly useful as a way of ordering probe
between devices depending on one another.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
drivers/memory/tegra/tegra186.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/memory/tegra/tegra186.c b/drivers/memory/tegra/tegra186.c
index 5d53f11ca7b6..8c43702340e8 100644
--- a/drivers/memory/tegra/tegra186.c
+++ b/drivers/memory/tegra/tegra186.c
@@ -4,6 +4,7 @@
*/

#include <linux/io.h>
+#include <linux/memory-controller.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/of_device.h>
@@ -32,6 +33,7 @@ struct tegra186_mc_soc {
};

struct tegra186_mc {
+ struct memory_controller base;
struct device *dev;
void __iomem *regs;

@@ -1532,13 +1534,18 @@ static int tegra186_mc_probe(struct platform_device *pdev)
return -ENOMEM;

mc->soc = of_device_get_match_data(&pdev->dev);
+ mc->dev = &pdev->dev;

res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mc->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(mc->regs))
return PTR_ERR(mc->regs);

- mc->dev = &pdev->dev;
+ mc->base.dev = &pdev->dev;
+
+ err = memory_controller_register(&mc->base);
+ if (err < 0)
+ return err;

err = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
if (err < 0)