From 55c8df0cb14843d4e19af18e0431f3d9b293c22a Mon Sep 17 00:00:00 2001
From: =?utf8?q?Beno=C3=AEt=20Th=C3=A9baudeau?=
<benoit.thebaudeau@advansee.com>
Date: Thu, 27 Sep 2012 10:22:51 +0000
Subject: [PATCH] mx5 clocks: Fix get_periph_clk()
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit
In the case periph_clk comes from periph_apm_clk, the latter is selected by the
CCM.CBCMR.periph_apm_sel mux, which can source the lp_apm clock from its
input â¯2. get_periph_clk() returned 0 instead of the lp_apm clock frequency in
this case.
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Stefano Babic <sbabic@denx.de>
---
arch/arm/cpu/armv7/mx5/clock.c | 42 ++++++++++++++++++----------------
1 file changed, 22 insertions(+), 20 deletions(-)
diff --git a/arch/arm/cpu/armv7/mx5/clock.c b/arch/arm/cpu/armv7/mx5/clock.c
index 8c71a51e8b..e6eae7eafe 100644
--- a/arch/arm/cpu/armv7/mx5/clock.c
+++ b/arch/arm/cpu/armv7/mx5/clock.c
@@ -239,6 +239,26 @@ static u32 get_fpm(void)
}
#endif
+/*
+ * This function returns the low power audio clock.
+ */
+static u32 get_lp_apm(void)
+{
+ u32 ret_val = 0;
+ u32 ccsr = readl(&mxc_ccm->ccsr);
+
+ if (ccsr & MXC_CCM_CCSR_LP_APM)
+#if defined(CONFIG_MX51)
+ ret_val = get_fpm();
+#elif defined(CONFIG_MX53)
+ ret_val = decode_pll(mxc_plls[PLL4_CLOCK], MXC_HCLK);
+#endif
+ else
+ ret_val = MXC_HCLK;
+
+ return ret_val;
+}
+
/*
* Get mcu main rate
*/
@@ -267,6 +287,8 @@ u32 get_periph_clk(void)
return decode_pll(mxc_plls[PLL1_CLOCK], MXC_HCLK);
case 1:
return decode_pll(mxc_plls[PLL3_CLOCK], MXC_HCLK);
+ case 2:
+ return get_lp_apm();
default:
return 0;
}
@@ -335,26 +357,6 @@ static u32 get_uart_clk(void)
return freq;
}
-/*
- * This function returns the low power audio clock.
- */
-static u32 get_lp_apm(void)
-{
- u32 ret_val = 0;
- u32 ccsr = readl(&mxc_ccm->ccsr);
-
- if (ccsr & MXC_CCM_CCSR_LP_APM)
-#if defined(CONFIG_MX51)
- ret_val = get_fpm();
-#elif defined(CONFIG_MX53)
- ret_val = decode_pll(mxc_plls[PLL4_CLOCK], MXC_HCLK);
-#endif
- else
- ret_val = MXC_HCLK;
-
- return ret_val;
-}
-
/*
* get cspi clock rate.
*/
--
2.39.5