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gpio: tegra186: Support multi-socket devices

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On Tegra platforms, multiple SoC instances may be present with each
defining the same GPIO name. For such devices, this results in
duplicate GPIO names.

When the device has a valid NUMA node, prepend the NUMA node ID
to the GPIO name prefix. The node ID identifies each socket,
ensuring GPIO line names remain distinct across multiple sockets.

Signed-off-by: Prathamesh Shete <pshete@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://patch.msgid.link/20260217081431.1208351-2-pshete@nvidia.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
This commit is contained in:
Prathamesh Shete 2026-02-17 08:14:31 +00:00 committed by Bartosz Golaszewski
parent 2423e336d9
commit 2c299030c6
1 changed files with 13 additions and 3 deletions
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16
drivers/gpio/gpio-tegra186.c
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@ -857,7 +857,7 @@ static int tegra186_gpio_probe(struct platform_device *pdev)
struct device_node *np;
struct resource *res;
char **names;
int err;
int node, err;
gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
if (!gpio)
@ -937,13 +937,23 @@ static int tegra186_gpio_probe(struct platform_device *pdev)
if (!names)
return -ENOMEM;
node = dev_to_node(&pdev->dev);
for (i = 0, offset = 0; i < gpio->soc->num_ports; i++) {
const struct tegra_gpio_port *port = &gpio->soc->ports[i];
char *name;
for (j = 0; j < port->pins; j++) {
name = devm_kasprintf(gpio->gpio.parent, GFP_KERNEL, "%sP%s.%02x",
gpio->soc->prefix ?: "", port->name, j);
if (node >= 0)
name = devm_kasprintf(gpio->gpio.parent, GFP_KERNEL,
"%d-%sP%s.%02x", node,
gpio->soc->prefix ?: "",
port->name, j);
else
name = devm_kasprintf(gpio->gpio.parent, GFP_KERNEL,
"%sP%s.%02x",
gpio->soc->prefix ?: "",
port->name, j);
if (!name)
return -ENOMEM;