On Wed, Aug 03, 2011 at 12:08:27AM +0100, Thomas Abraham wrote:
> For device tree based probe, the dependecy on pdev->id to attach a
> corresponding default port info to the driver's private data is
> removed. The fifosize parameter is obtained from the device tree
> node and the next available instance of port info is updated
> with the fifosize value and attached to the driver's private data.
> The default platform data is selected based on the compatible property.
>
> CC: Ben Dooks <ben-li...@fluff.org>
> Signed-off-by: Thomas Abraham <thomas.abra...@linaro.org>
> ---
> .../devicetree/bindings/serial/samsung_uart.txt | 16 +++++++
> drivers/tty/serial/s5pv210.c | 43
> +++++++++++++++++++-
> drivers/tty/serial/samsung.c | 5 ++-
> 3 files changed, 62 insertions(+), 2 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/serial/samsung_uart.txt
>
> diff --git a/Documentation/devicetree/bindings/serial/samsung_uart.txt
> b/Documentation/devicetree/bindings/serial/samsung_uart.txt
> new file mode 100644
> index 0000000..9174499
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/serial/samsung_uart.txt
> @@ -0,0 +1,16 @@
> +* Samsung's UART Controller
> +
> +The Samsung's UART controller is used for serial communications on all of
> +Samsung's s3c24xx, s3c64xx and s5p series application processors.
> +
> +Required properties:
> +- compatible: should be specific to the application processor
> + - "samsung,s5pv310-uart" , for Exynos4 processors.
> +
> +- reg: base physical address of the controller and length of memory mapped
> + region.
> +
> +- interrupts : Three interrupt numbers should be specified in the following
> + order - Rx interrupt, Tx interrupt, Error Interrupt.
> +
> +- samsung,uart-fifosize: Size of the tx/rx fifo used in the controller.
> diff --git a/drivers/tty/serial/s5pv210.c b/drivers/tty/serial/s5pv210.c
> index fb0806c..a44b599 100644
> --- a/drivers/tty/serial/s5pv210.c
> +++ b/drivers/tty/serial/s5pv210.c
> @@ -19,6 +19,7 @@
> #include <linux/serial_core.h>
> #include <linux/serial.h>
> #include <linux/delay.h>
> +#include <linux/of.h>
>
> #include <asm/irq.h>
> #include <mach/hardware.h>
> @@ -132,10 +133,49 @@ static struct s3c24xx_uart_info *s5p_uart_inf[] = {
> [3] = &s5p_port_fifo16,
> };
>
> +#ifdef CONFIG_OF
> +static struct s3c2410_uartcfg s5pv310_uart_defcfg = {
> + .ucon = 0x3c5,
> + .ufcon = 0x111,
> + .flags = NO_NEED_CHECK_CLKSRC,
> + .has_fracval = 1,
> +};
> +
> +static const struct of_device_id s5pv210_uart_dt_match[] = {
> + { .compatible = "samsung,s5pv310-uart", .data = &s5pv310_uart_defcfg },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, s5pv210_uart_match);
> +#else
> +#define s5pv210_uart_match NULL
> +#endif
> +
> /* device management */
> static int s5p_serial_probe(struct platform_device *pdev)
> {
> - return s3c24xx_serial_probe(pdev, s5p_uart_inf[pdev->id]);
> + static unsigned int probe_index;
> + unsigned int port = pdev->id;
> + const struct of_device_id *match;
> + struct s3c2410_uartcfg *cfg;
> +
> + if (pdev->dev.of_node) {
> + if (of_property_read_u32(pdev->dev.of_node,
> + "samsung,uart-fifosize",
> + &s5p_uart_inf[probe_index]->fifosize))
> + return -EINVAL;
I'd rather see the fifo size either being a property of the soc itself
or being inferred by the compatible field.
> .driver = {
> .name = "s5pv210-uart",
> .owner = THIS_MODULE,
> + .of_match_table = s5pv210_uart_dt_match,
I think maybe doing something like
.of_match_table = of_match_ptr(5pv210_uart_dt_match),
so we can avoid having the #else and #define 5pv210_uart_dt_match NULL
in a number of places.
> },
> };
--
Ben Dooks, b...@fluff.org, http://www.fluff.org/ben/
Large Hadron Colada: A large Pina Colada that makes the universe disappear.
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