On Sun, Jul 03, 2011 at 03:55:59PM +0800, Shawn Guo wrote:
> The patch removes all the uses of cpu_is_mx1(). Instead, it uses
> the .id_table of platform_driver to distinguish the uart device type.
>
> Signed-off-by: Shawn Guo <shawn.guo@xxxxxxxxxx>
> Cc: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> Cc: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
> ---
> arch/arm/mach-imx/clock-imx1.c | 6 +-
> arch/arm/plat-mxc/devices/platform-imx-uart.c | 2 +-
> drivers/tty/serial/imx.c | 51 ++++++++++++++++++++++--
> 3 files changed, 50 insertions(+), 9 deletions(-)
>
> diff --git a/arch/arm/mach-imx/clock-imx1.c b/arch/arm/mach-imx/clock-imx1.c
> index dcc4172..4aabeb2 100644
> --- a/arch/arm/mach-imx/clock-imx1.c
> +++ b/arch/arm/mach-imx/clock-imx1.c
> @@ -587,9 +587,9 @@ static struct clk_lookup lookups[] __initdata = {
> _REGISTER_CLOCK(NULL, "mma", mma_clk)
> _REGISTER_CLOCK("imx_udc.0", NULL, usbd_clk)
> _REGISTER_CLOCK(NULL, "gpt", gpt_clk)
> - _REGISTER_CLOCK("imx-uart.0", NULL, uart_clk)
> - _REGISTER_CLOCK("imx-uart.1", NULL, uart_clk)
> - _REGISTER_CLOCK("imx-uart.2", NULL, uart_clk)
> + _REGISTER_CLOCK("imx1-uart.0", NULL, uart_clk)
> + _REGISTER_CLOCK("imx1-uart.1", NULL, uart_clk)
> + _REGISTER_CLOCK("imx1-uart.2", NULL, uart_clk)
> _REGISTER_CLOCK("imx-i2c.0", NULL, i2c_clk)
> _REGISTER_CLOCK("imx1-cspi.0", NULL, spi_clk)
> _REGISTER_CLOCK("imx1-cspi.1", NULL, spi_clk)
> diff --git a/arch/arm/plat-mxc/devices/platform-imx-uart.c b/arch/arm/plat-mxc/devices/platform-imx-uart.c
> index cfce8c9..477271a 100644
> --- a/arch/arm/plat-mxc/devices/platform-imx-uart.c
> +++ b/arch/arm/plat-mxc/devices/platform-imx-uart.c
> @@ -152,7 +152,7 @@ struct platform_device *__init imx_add_imx_uart_3irq(
> },
> };
>
> - return imx_add_platform_device("imx-uart", data->id, res,
> + return imx_add_platform_device("imx1-uart", data->id, res,
> ARRAY_SIZE(res), pdata, sizeof(*pdata));
> }
>
> diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
> index 22fe801..983f3bd 100644
> --- a/drivers/tty/serial/imx.c
> +++ b/drivers/tty/serial/imx.c
> @@ -48,7 +48,6 @@
>
> #include <asm/io.h>
> #include <asm/irq.h>
> -#include <mach/hardware.h>
> #include <mach/imx-uart.h>
>
> /* Register definitions */
> @@ -67,7 +66,8 @@
> #define UBMR 0xa8 /* BRM Modulator Register */
> #define UBRC 0xac /* Baud Rate Count Register */
> #define MX2_ONEMS 0xb0 /* One Millisecond register */
> -#define UTS (cpu_is_mx1() ? 0xd0 : 0xb4) /* UART Test Register */
> +#define MX1_UTS 0xd0 /* UART Test Register on mx1 */
> +#define MX2_UTS 0xb4 /* UART Test Register on mx2 and later */
>
> /* UART Control Register Bit Fields.*/
> #define URXD_CHARRDY (1<<15)
> @@ -181,6 +181,17 @@
>
> #define UART_NR 8
>
> +enum imx_uart_type {
> + IMX1_UART,
> + IMX2_UART,
> +};
> +
> +/* device type dependent stuff */
> +struct imx_uart_data {
> + unsigned uts_reg;
> + enum imx_uart_type devtype;
> +};
> +
> struct imx_port {
> struct uart_port port;
> struct timer_list timer;
> @@ -192,6 +203,7 @@ struct imx_port {
> unsigned int irda_inv_tx:1;
> unsigned short trcv_delay; /* transceiver delay */
> struct clk *clk;
> + struct imx_uart_data *devdata;
> };
>
> #ifdef CONFIG_IRDA
> @@ -200,6 +212,33 @@ struct imx_port {
> #define USE_IRDA(sport) (0)
> #endif
>
> +#define UTS (sport->devdata->uts_reg)
> +#define IS_IMX1_UART() (sport->devdata->devtype == IMX1_UART)
> +#define IS_IMX2_UART() (sport->devdata->devtype == IMX2_UART)
> +
> +static struct imx_uart_data imx_uart_devdata[] = {
> + [IMX1_UART] = {
> + .uts_reg = MX1_UTS,
> + .devtype = IMX1_UART,
> + },
> + [IMX2_UART] = {
> + .uts_reg = MX2_UTS,
> + .devtype = IMX2_UART,
> + },
> +};
> +
> +static struct platform_device_id imx_uart_devtype[] = {
> + {
> + .name = "imx1-uart",
> + .driver_data = IMX1_UART,
> + }, {
> + .name = "imx-uart",
> + .driver_data = IMX2_UART,
Rather than using driver_data as an index, and having a separate
table, you can use it as a pointer to the imx_uard_data structure.
That's why driver_data is declared as a kernel_ulong_t. The only
reason it isn't a void* (AFAIK) is that mod_devicetable.h is exported
to userspace.
> + }, {
> + /* sentinel */
> + }
> +};
> +
> /*
> * Handle any change of modem status signal since we were last called.
> */
> @@ -689,7 +728,7 @@ static int imx_startup(struct uart_port *port)
> }
> }
>
> - if (!cpu_is_mx1()) {
> + if (IS_IMX2_UART()) {
The logic is getting reversed here, is this really what you want to
do? I would think you'd want to preserve the !IS_IMX1_UART() logic.
> temp = readl(sport->port.membase + UCR3);
> temp |= MX2_UCR3_RXDMUXSEL;
> writel(temp, sport->port.membase + UCR3);
> @@ -923,7 +962,7 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios,
> writel(num, sport->port.membase + UBIR);
> writel(denom, sport->port.membase + UBMR);
>
> - if (!cpu_is_mx1())
> + if (IS_IMX2_UART())
> writel(sport->port.uartclk / div / 1000,
> sport->port.membase + MX2_ONEMS);
>
> @@ -1062,7 +1101,7 @@ imx_console_write(struct console *co, const char *s, unsigned int count)
> ucr1 = old_ucr1 = readl(sport->port.membase + UCR1);
> old_ucr2 = readl(sport->port.membase + UCR2);
>
> - if (cpu_is_mx1())
> + if (IS_IMX1_UART())
> ucr1 |= MX1_UCR1_UARTCLKEN;
> ucr1 |= UCR1_UARTEN;
> ucr1 &= ~(UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_RTSDEN);
> @@ -1262,6 +1301,7 @@ static int serial_imx_probe(struct platform_device *pdev)
> init_timer(&sport->timer);
> sport->timer.function = imx_timeout;
> sport->timer.data = (unsigned long)sport;
> + sport->devdata = &imx_uart_devdata[pdev->id_entry->driver_data];
>
> sport->clk = clk_get(&pdev->dev, "uart");
> if (IS_ERR(sport->clk)) {
> @@ -1340,6 +1380,7 @@ static struct platform_driver serial_imx_driver = {
>
> .suspend = serial_imx_suspend,
> .resume = serial_imx_resume,
> + .id_table = imx_uart_devtype,
> .driver = {
> .name = "imx-uart",
> .owner = THIS_MODULE,
> --
> 1.7.4.1
>
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> https://lists.ozlabs.org/listinfo/devicetree-discuss
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