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authorJon Hunter <jonathanh@nvidia.com>2017-03-28 13:42:55 +0100
committerThierry Reding <treding@nvidia.com>2017-04-04 15:49:46 +0200
commit841fd94c43a4034f08eb830ef7b93a441b4d7378 (patch)
tree2141529ff48037ecce7e3c98c8ab3d6b96b5365e /drivers/soc
parent7e10cf743634a6b0f3cf63046c49294b38254fe9 (diff)
downloadop-kernel-dev-841fd94c43a4034f08eb830ef7b93a441b4d7378.zip
op-kernel-dev-841fd94c43a4034f08eb830ef7b93a441b4d7378.tar.gz
soc/tegra: flowctrl: Add basic platform driver
Add a simple platform driver for the flowctrl module so that it gets registered as a proper device. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/soc')
-rw-r--r--drivers/soc/tegra/flowctrl.c34
1 files changed, 30 insertions, 4 deletions
diff --git a/drivers/soc/tegra/flowctrl.c b/drivers/soc/tegra/flowctrl.c
index 3a5a1cb..25eddfc 100644
--- a/drivers/soc/tegra/flowctrl.c
+++ b/drivers/soc/tegra/flowctrl.c
@@ -24,6 +24,7 @@
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/platform_device.h>
#include <soc/tegra/common.h>
#include <soc/tegra/flowctrl.h>
@@ -47,7 +48,7 @@ static void __iomem *tegra_flowctrl_base;
static void flowctrl_update(u8 offset, u32 value)
{
- if (WARN_ONCE(!tegra_flowctrl_base,
+ if (WARN_ONCE(IS_ERR_OR_NULL(tegra_flowctrl_base),
"Tegra flowctrl not initialised!\n"))
return;
@@ -62,7 +63,7 @@ u32 flowctrl_read_cpu_csr(unsigned int cpuid)
{
u8 offset = flowctrl_offset_cpu_csr[cpuid];
- if (WARN_ONCE(!tegra_flowctrl_base,
+ if (WARN_ONCE(IS_ERR_OR_NULL(tegra_flowctrl_base),
"Tegra flowctrl not initialised!\n"))
return 0;
@@ -148,7 +149,22 @@ void flowctrl_cpu_suspend_exit(unsigned int cpuid)
flowctrl_write_cpu_csr(cpuid, reg);
}
-static const struct of_device_id matches[] __initconst = {
+static int tegra_flowctrl_probe(struct platform_device *pdev)
+{
+ void __iomem *base = tegra_flowctrl_base;
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ tegra_flowctrl_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(tegra_flowctrl_base))
+ return PTR_ERR(base);
+
+ iounmap(base);
+
+ return 0;
+}
+
+static const struct of_device_id tegra_flowctrl_match[] = {
{ .compatible = "nvidia,tegra124-flowctrl" },
{ .compatible = "nvidia,tegra114-flowctrl" },
{ .compatible = "nvidia,tegra30-flowctrl" },
@@ -156,6 +172,16 @@ static const struct of_device_id matches[] __initconst = {
{ }
};
+static struct platform_driver tegra_flowctrl_driver = {
+ .driver = {
+ .name = "tegra-flowctrl",
+ .suppress_bind_attrs = true,
+ .of_match_table = tegra_flowctrl_match,
+ },
+ .probe = tegra_flowctrl_probe,
+};
+builtin_platform_driver(tegra_flowctrl_driver);
+
static int __init tegra_flowctrl_init(void)
{
/* hardcoded fallback if device tree node is missing */
@@ -166,7 +192,7 @@ static int __init tegra_flowctrl_init(void)
if (!soc_is_tegra())
return 0;
- np = of_find_matching_node(NULL, matches);
+ np = of_find_matching_node(NULL, tegra_flowctrl_match);
if (np) {
struct resource res;
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