On Wed, Sep 26, 2012 at 04:04:14PM -0400, Andrew Bradford wrote:
If configured to use UART{1,2,4,5}, such as on the Beaglebone RS232 cape, enable the required clocks for the UART in use.
Signed-off-by: Andrew Bradford andrew@bradfordembedded.com
arch/arm/cpu/armv7/am33xx/clock.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+)
diff --git a/arch/arm/cpu/armv7/am33xx/clock.c b/arch/arm/cpu/armv7/am33xx/clock.c index 2b19506..4eb9226 100644 --- a/arch/arm/cpu/armv7/am33xx/clock.c +++ b/arch/arm/cpu/armv7/am33xx/clock.c @@ -114,6 +114,34 @@ static void enable_per_clocks(void) while (readl(&cmwkup->wkup_uart0ctrl) != PRCM_MOD_EN) ;
- /* UART1 */
+#ifdef CONFIG_SERIAL2
- writel(PRCM_MOD_EN, &cmper->uart1clkctrl);
- while (readl(&cmper->uart1clkctrl) != PRCM_MOD_EN)
;+#endif /* CONFIG_SERIAL2 */
- /* UART2 */
+#ifdef CONFIG_SERIAL3
- writel(PRCM_MOD_EN, &cmper->uart2clkctrl);
- while (readl(&cmper->uart2clkctrl) != PRCM_MOD_EN)
;+#endif /* CONFIG_SERIAL3 */
Profile 5 on the AM335x EVM supports UART3. I know we discussed on IRC that BeagleBone doesn't have that uart pinned out, but I think since this is generic code *and* it can be tested on the full EVM, you should include support for it here.
- /* UART4 */
+#ifdef CONFIG_SERIAL5
- writel(PRCM_MOD_EN, &cmper->uart4clkctrl);
- while (readl(&cmper->uart4clkctrl) != PRCM_MOD_EN)
;+#endif /* CONFIG_SERIAL5 */
- /* UART5 */
+#ifdef CONFIG_SERIAL6
- writel(PRCM_MOD_EN, &cmper->uart5clkctrl);
- while (readl(&cmper->uart5clkctrl) != PRCM_MOD_EN)
;+#endif /* CONFIG_SERIAL6 */
- /* MMC0*/ writel(PRCM_MOD_EN, &cmper->mmc0clkctrl); while (readl(&cmper->mmc0clkctrl) != PRCM_MOD_EN)
-- 1.7.10
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