clk: ti: am33xx: fix RTC clock parent

[ Upstream commit dc6dbd51009fc412729c307161f442c0a08618f4 ]

Right now, trying to use RTC purely with the ti-sysc / clkctrl framework
fails to enable the RTC module properly. Based on experimentation, this
appears to be because RTC is sourced from the clkdiv32k optional clock.
TRM is not very clear on this topic, but fix the RTC to use the proper
source clock nevertheless.

Reported-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Link: https://lkml.kernel.org/r/20200424152301.4018-1-t-kristo@ti.com
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/clk/ti/clk-33xx.c b/drivers/clk/ti/clk-33xx.c
index e001b9bcb6bf7d06ce4ea12a4e43f6d32fabcd37..7dc30dd6c8d552fa7d42c75b9c492ff489cdd8d5 100644 (file)
--- a/drivers/clk/ti/clk-33xx.c
+++ b/drivers/clk/ti/clk-33xx.c
@@ -212,7 +212,7 @@ static const struct omap_clkctrl_reg_data am3_mpu_clkctrl_regs[] __initconst = {
 };
 
 static const struct omap_clkctrl_reg_data am3_l4_rtc_clkctrl_regs[] __initconst = {
-       { AM3_L4_RTC_RTC_CLKCTRL, NULL, CLKF_SW_SUP, "clk_32768_ck" },
+       { AM3_L4_RTC_RTC_CLKCTRL, NULL, CLKF_SW_SUP, "clk-24mhz-clkctrl:0000:0" },
        { 0 },
 };