[PATCH 2/2] soc/tegra: pmc: don't fail if "aotag" is not present

[Jon Hunter <jonathanh@nvidia.com>]

From: Prathamesh Shete <pshete@nvidia.com>

The "aotog" is an optional aperture, so if that aperture is not defined
for a given device, then initialise the 'aotag' pointer to NULL instead
of returning an error. Note that the PMC driver will not use 'aotag'
pointer if initialised to NULL.

Co-developed-by: Shardar Mohammed <smohammed@nvidia.com>
Signed-off-by: Shardar Mohammed <smohammed@nvidia.com>
Signed-off-by: Prathamesh Shete <pshete@nvidia.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
---
 drivers/soc/tegra/pmc.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index 034a2a535a1e..d8c8894a8f38 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -2897,9 +2897,16 @@ static int tegra_pmc_probe(struct platform_device *pdev)
 		if (IS_ERR(pmc->wake))
 			return PTR_ERR(pmc->wake);
 
-		pmc->aotag = devm_platform_ioremap_resource_byname(pdev, "aotag");
-		if (IS_ERR(pmc->aotag))
-			return PTR_ERR(pmc->aotag);
+		/* "aotag" is an optional aperture */
+		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+						   "aotag");
+		if (res) {
+			pmc->aotag = devm_ioremap_resource(&pdev->dev, res);
+			if (IS_ERR(pmc->aotag))
+				return PTR_ERR(pmc->aotag);
+		} else {
+			pmc->aotag = NULL;
+		}
 
 		/* "scratch" is an optional aperture */
 		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-- 
2.43.0