[PATCH 1/2] ARM imx53: add pwm devices support

[Eric Miao]

On Tue, Mar 1, 2011 at 2:30 PM, Jason Chen <b02280 at freescale.com> wrote:
> Signed-off-by: Jason Chen <b02280 at freescale.com>

Looks perfect to me. Sascha?

> ---
>  arch/arm/mach-mx5/clock-mx51-mx53.c          |    2 ++
>  arch/arm/mach-mx5/devices-imx53.h            |    4 ++++
>  arch/arm/mach-mx5/devices.c                  |   10 ++++++++++
>  arch/arm/mach-mx5/devices.h                  |    2 ++
>  arch/arm/plat-mxc/devices/Kconfig            |    1 +
>  arch/arm/plat-mxc/devices/platform-mxc_pwm.c |    9 +++++++++
>  arch/arm/plat-mxc/pwm.c                      |    3 ++-
>  7 files changed, 30 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c
> index 8164b1d..e18807b 100644
> --- a/arch/arm/mach-mx5/clock-mx51-mx53.c
> +++ b/arch/arm/mach-mx5/clock-mx51-mx53.c
> @@ -1338,6 +1338,8 @@ static struct clk_lookup mx53_lookups[] = {
>        _REGISTER_CLOCK("imx53-cspi.0", NULL, cspi_clk)
>        _REGISTER_CLOCK("imx2-wdt.0", NULL, dummy_clk)
>        _REGISTER_CLOCK("imx2-wdt.1", NULL, dummy_clk)
> +       _REGISTER_CLOCK("mxc_pwm.0", "pwm", pwm1_clk)
> +       _REGISTER_CLOCK("mxc_pwm.1", "pwm", pwm2_clk)
>  };
>
>  static void clk_tree_init(void)
> diff --git a/arch/arm/mach-mx5/devices-imx53.h b/arch/arm/mach-mx5/devices-imx53.h
> index 9251008..5a1d6c9 100644
> --- a/arch/arm/mach-mx5/devices-imx53.h
> +++ b/arch/arm/mach-mx5/devices-imx53.h
> @@ -33,3 +33,7 @@ extern const struct imx_spi_imx_data imx53_ecspi_data[] __initconst;
>  extern const struct imx_imx2_wdt_data imx53_imx2_wdt_data[] __initconst;
>  #define imx53_add_imx2_wdt(id, pdata)  \
>        imx_add_imx2_wdt(&imx53_imx2_wdt_data[id])
> +
> +extern const struct imx_mxc_pwm_data imx53_mxc_pwm_data[] __initconst;
> +#define imx53_add_mxc_pwm(id)  \
> +       imx_add_mxc_pwm(&imx53_mxc_pwm_data[id])
> diff --git a/arch/arm/mach-mx5/devices.c b/arch/arm/mach-mx5/devices.c
> index 153ada5..74aec2b 100644
> --- a/arch/arm/mach-mx5/devices.c
> +++ b/arch/arm/mach-mx5/devices.c
> @@ -120,6 +120,16 @@ struct platform_device mxc_usbh2_device = {
>        },
>  };
>
> +struct platform_device mxc_pwm1_backlight_device = {
> +       .name = "pwm-backlight",
> +       .id = 0,
> +};
> +
> +struct platform_device mxc_pwm2_backlight_device = {
> +       .name = "pwm-backlight",
> +       .id = 1,
> +};
> +
>  static struct mxc_gpio_port mxc_gpio_ports[] = {
>        {
>                .chip.label = "gpio-0",
> diff --git a/arch/arm/mach-mx5/devices.h b/arch/arm/mach-mx5/devices.h
> index 55a5129..a74cd97 100644
> --- a/arch/arm/mach-mx5/devices.h
> +++ b/arch/arm/mach-mx5/devices.h
> @@ -3,3 +3,5 @@ extern struct platform_device mxc_usbh1_device;
>  extern struct platform_device mxc_usbh2_device;
>  extern struct platform_device mxc_usbdr_udc_device;
>  extern struct platform_device mxc_hsi2c_device;
> +extern struct platform_device mxc_pwm1_backlight_device;
> +extern struct platform_device mxc_pwm2_backlight_device;
> diff --git a/arch/arm/plat-mxc/devices/Kconfig b/arch/arm/plat-mxc/devices/Kconfig
> index b9ab1d5..aee9f4b 100644
> --- a/arch/arm/plat-mxc/devices/Kconfig
> +++ b/arch/arm/plat-mxc/devices/Kconfig
> @@ -58,6 +58,7 @@ config IMX_HAVE_PLATFORM_MXC_NAND
>
>  config IMX_HAVE_PLATFORM_MXC_PWM
>        bool
> +       default y if ARCH_MX21 || ARCH_MX25 || SOC_IMX27 || SOC_IMX51 || SOC_IMX53
>
>  config IMX_HAVE_PLATFORM_MXC_RNGA
>        bool
> diff --git a/arch/arm/plat-mxc/devices/platform-mxc_pwm.c b/arch/arm/plat-mxc/devices/platform-mxc_pwm.c
> index b0c4ae2..18cfd07 100644
> --- a/arch/arm/plat-mxc/devices/platform-mxc_pwm.c
> +++ b/arch/arm/plat-mxc/devices/platform-mxc_pwm.c
> @@ -49,6 +49,15 @@ const struct imx_mxc_pwm_data imx51_mxc_pwm_data[] __initconst = {
>  };
>  #endif /* ifdef CONFIG_SOC_IMX51 */
>
> +#ifdef CONFIG_SOC_IMX53
> +const struct imx_mxc_pwm_data imx53_mxc_pwm_data[] __initconst = {
> +#define imx53_mxc_pwm_data_entry(_id, _hwid)                           \
> +       imx_mxc_pwm_data_entry(MX53, _id, _hwid, SZ_16K)
> +       imx53_mxc_pwm_data_entry(0, 1),
> +       imx53_mxc_pwm_data_entry(1, 2),
> +};
> +#endif /* ifdef CONFIG_SOC_IMX53 */
> +
>  struct platform_device *__init imx_add_mxc_pwm(
>                const struct imx_mxc_pwm_data *data)
>  {
> diff --git a/arch/arm/plat-mxc/pwm.c b/arch/arm/plat-mxc/pwm.c
> index 7a61ef8..61dd8fb 100644
> --- a/arch/arm/plat-mxc/pwm.c
> +++ b/arch/arm/plat-mxc/pwm.c
> @@ -57,7 +57,8 @@ int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
>        if (pwm == NULL || period_ns == 0 || duty_ns > period_ns)
>                return -EINVAL;
>
> -       if (cpu_is_mx27() || cpu_is_mx3() || cpu_is_mx25() || cpu_is_mx51()) {
> +       if (cpu_is_mx27() || cpu_is_mx3() || cpu_is_mx25() || cpu_is_mx51() ||
> +               cpu_is_mx53()) {

This might be improved in the future by using platform_device_id,
or by introducing some flags from platform_data, or when registering
the pwm devices.

>                unsigned long long c;
>                unsigned long period_cycles, duty_cycles, prescale;
>                u32 cr;
> --
> 1.7.1
>
>
>
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