On Tue, 3 Mar 2015 15:12:02 +0530 Keerthy <j-keer...@ti.com> wrote:
> Add external 32k clock feature. The internal clock will be gated during
> suspend.
> Hence make use of the external 32k clock so that rtc is functional accross
> suspend/resume.
>
> ...
>
> @@ -446,6 +449,7 @@ static const struct omap_rtc_device_type
> omap_rtc_default_type = {
>
> static const struct omap_rtc_device_type omap_rtc_am3352_type = {
> .has_32kclk_en = true,
> + .has_osc_ext_32k = true,
> .has_kicker = true,
> .has_irqwakeen = true,
> .has_pmic_mode = true,
> @@ -543,7 +547,16 @@ static int __init omap_rtc_probe(struct platform_device
> *pdev)
> if (rtc->type->has_32kclk_en) {
> reg = rtc_read(rtc, OMAP_RTC_OSC_REG);
> rtc_writel(rtc, OMAP_RTC_OSC_REG,
> - reg | OMAP_RTC_OSC_32KCLK_EN);
> + reg | OMAP_RTC_OSC_32KCLK_EN);
> + }
> +
> + /* Enable External clock as the source */
> +
> + if (rtc->type->has_osc_ext_32k) {
> + rtc_writel(rtc, OMAP_RTC_OSC_REG,
> + (OMAP_RTC_OSC_EXT_32K |
> + rtc_read(rtc, OMAP_RTC_OSC_REG)) &
> + (~OMAP_RTC_OSC_OSC32K_GZ));
> }
How do we know that all systems have this external clock and that it
works OK?
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