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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2017-05-22 13:43:18 +0300 |
|---|---|---|
| committer | Jan Kiszka <jan.kiszka@siemens.com> | 2017-07-03 09:32:42 +0300 |
| commit | 380b1e2f3a2f32bfe9c0aa85a68629eb99b043c0 (patch) | |
| tree | 98ba961d67ef9bcba4c5762bdf6c623a573f4614 /drivers/tty/serial | |
| parent | 277036f05be242540b7bfe75f226107d04f51b06 (diff) | |
| download | linux-380b1e2f3a2f32bfe9c0aa85a68629eb99b043c0.tar.xz | |
gpio-exar/8250-exar: Make set of exported GPIOs configurable
On the SIMATIC, IOT2040 only a single pin is exportable as GPIO, the
rest is required to operate the UART. To allow modeling this case,
expand the platform device data structure to specify a (consecutive) pin
subset for exporting by the gpio-exar driver.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/8250/8250_exar.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c index 575a252dc936..9931e26ca061 100644 --- a/drivers/tty/serial/8250/8250_exar.c +++ b/drivers/tty/serial/8250/8250_exar.c @@ -14,6 +14,7 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> +#include <linux/property.h> #include <linux/serial_core.h> #include <linux/serial_reg.h> #include <linux/slab.h> @@ -194,7 +195,8 @@ static void setup_gpio(u8 __iomem *p) } static void * -__xr17v35x_register_gpio(struct pci_dev *pcidev) +__xr17v35x_register_gpio(struct pci_dev *pcidev, + const struct property_entry *properties) { struct platform_device *pdev; @@ -205,7 +207,8 @@ __xr17v35x_register_gpio(struct pci_dev *pcidev) pdev->dev.parent = &pcidev->dev; ACPI_COMPANION_SET(&pdev->dev, ACPI_COMPANION(&pcidev->dev)); - if (platform_device_add(pdev) < 0) { + if (platform_device_add_properties(pdev, properties) < 0 || + platform_device_add(pdev) < 0) { platform_device_put(pdev); return NULL; } @@ -213,12 +216,18 @@ __xr17v35x_register_gpio(struct pci_dev *pcidev) return pdev; } +static const struct property_entry exar_gpio_properties[] = { + PROPERTY_ENTRY_U32("linux,first-pin", 0), + PROPERTY_ENTRY_U32("ngpios", 16), + { } +}; + static int xr17v35x_register_gpio(struct pci_dev *pcidev, struct uart_8250_port *port) { if (pcidev->vendor == PCI_VENDOR_ID_EXAR) port->port.private_data = - __xr17v35x_register_gpio(pcidev); + __xr17v35x_register_gpio(pcidev, exar_gpio_properties); return 0; } |