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From: "Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v2 1/2] mx35: Define default SoC input clock frequencies
Date: Tue, 21 Aug 2012 23:07:20 +0200 (CEST)	[thread overview]
Message-ID: <1229734407.2662896.1345583240015.JavaMail.root@advansee.com> (raw)
In-Reply-To: <502EA0AB.1060601@denx.de>

Define default SoC input clock frequencies for i.MX35 in order to get rid of
duplicated definitions.

Signed-off-by: Beno?t Th?baudeau <benoit.thebaudeau@advansee.com>
Cc: Stefano Babic <sbabic@denx.de>
---
This patch depends on http://patchwork.ozlabs.org/patch/177437/ .

Changes for v2:
 - New patch.

 .../arch/arm/cpu/arm1136/mx35/generic.c            |   43 ++++++++------------
 .../arch/arm/cpu/arm1136/mx35/timer.c              |    2 +-
 .../arch/arm/include/asm/arch-mx35/clock.h         |   14 +++++++
 .../include/configs/flea3.h                        |    1 -
 .../include/configs/mx35pdk.h                      |    1 -
 5 files changed, 31 insertions(+), 30 deletions(-)

diff --git u-boot-imx-88e73dd.orig/arch/arm/cpu/arm1136/mx35/generic.c u-boot-imx-88e73dd/arch/arm/cpu/arm1136/mx35/generic.c
index 8f61069..04c8341 100644
--- u-boot-imx-88e73dd.orig/arch/arm/cpu/arm1136/mx35/generic.c
+++ u-boot-imx-88e73dd/arch/arm/cpu/arm1136/mx35/generic.c
@@ -149,9 +149,7 @@ static u32 get_mcu_main_clk(void)
 	struct ccm_regs *ccm =
 		(struct ccm_regs *)IMX_CCM_BASE;
 	arm_div = get_arm_div(readl(&ccm->pdr0), &fi, &fd);
-	fi *=
-		decode_pll(readl(&ccm->mpctl),
-			CONFIG_MX35_HCLK_FREQ);
+	fi *= decode_pll(readl(&ccm->mpctl), MXC_HCLK);
 	return fi / (arm_div * fd);
 }
 
@@ -193,12 +191,10 @@ u32 imx_get_uartclk(void)
 		(struct ccm_regs *)IMX_CCM_BASE;
 	u32 pdr4 = readl(&ccm->pdr4);
 
-	if (readl(&ccm->pdr3) & MXC_CCM_PDR3_UART_M_U) {
+	if (readl(&ccm->pdr3) & MXC_CCM_PDR3_UART_M_U)
 		freq = get_mcu_main_clk();
-	} else {
-		freq = decode_pll(readl(&ccm->ppctl),
-			CONFIG_MX35_HCLK_FREQ);
-	}
+	else
+		freq = decode_pll(readl(&ccm->ppctl), MXC_HCLK);
 	freq /= CCM_GET_DIVIDER(pdr4,
 			MXC_CCM_PDR4_UART_PODF_MASK,
 			MXC_CCM_PDR4_UART_PODF_OFFSET) + 1;
@@ -253,12 +249,10 @@ unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
 		break;
 	case USB_CLK:
 		usb_podf = (reg4 >> 22) & 0x3F;
-		if (reg4 & 0x200) {
+		if (reg4 & 0x200)
 			pll = get_mcu_main_clk();
-		} else {
-			pll = decode_pll(readl(&ccm->ppctl),
-				CONFIG_MX35_HCLK_FREQ);
-		}
+		else
+			pll = decode_pll(readl(&ccm->ppctl), MXC_HCLK);
 
 		ret_val = pll / (usb_podf + 1);
 		break;
@@ -285,15 +279,14 @@ unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
 		clk_sel = mpdr3 & (1 << 14);
 		pdf = (mpdr4 >> 10) & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				(pdf + 1);
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
 		break;
 	case SSI1_BAUD:
 		pre_pdf = (mpdr2 >> 24) & 0x7;
 		pdf = mpdr2 & 0x3F;
 		clk_sel = mpdr2 & (1 << 6);
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
 				((pre_pdf + 1) * (pdf + 1));
 		break;
 	case SSI2_BAUD:
@@ -301,15 +294,14 @@ unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
 		pdf = (mpdr2 >> 8) & 0x3F;
 		clk_sel = mpdr2 & (1 << 6);
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
 				((pre_pdf + 1) * (pdf + 1));
 		break;
 	case CSI_BAUD:
 		clk_sel = mpdr2 & (1 << 7);
 		pdf = (mpdr2 >> 16) & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				(pdf + 1);
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
 		break;
 	case MSHC_CLK:
 		pre_pdf = readl(&ccm->pdr1);
@@ -317,36 +309,33 @@ unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
 		pdf = (pre_pdf >> 22) & 0x3F;
 		pre_pdf = (pre_pdf >> 28) & 0x7;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
 				((pre_pdf + 1) * (pdf + 1));
 		break;
 	case ESDHC1_CLK:
 		clk_sel = mpdr3 & 0x40;
 		pdf = mpdr3 & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				(pdf + 1);
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
 		break;
 	case ESDHC2_CLK:
 		clk_sel = mpdr3 & 0x40;
 		pdf = (mpdr3 >> 8) & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				(pdf + 1);
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
 		break;
 	case ESDHC3_CLK:
 		clk_sel = mpdr3 & 0x40;
 		pdf = (mpdr3 >> 16) & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
-				(pdf + 1);
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
 		break;
 	case SPDIF_CLK:
 		clk_sel = mpdr3 & 0x400000;
 		pre_pdf = (mpdr3 >> 29) & 0x7;
 		pdf = (mpdr3 >> 23) & 0x3F;
 		ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
-			decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) /
+			decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
 				((pre_pdf + 1) * (pdf + 1));
 		break;
 	default:
diff --git u-boot-imx-88e73dd.orig/arch/arm/cpu/arm1136/mx35/timer.c u-boot-imx-88e73dd/arch/arm/cpu/arm1136/mx35/timer.c
index 04937a1..6000042 100644
--- u-boot-imx-88e73dd.orig/arch/arm/cpu/arm1136/mx35/timer.c
+++ u-boot-imx-88e73dd/arch/arm/cpu/arm1136/mx35/timer.c
@@ -101,7 +101,7 @@ ulong get_timer_masked(void)
 {
 	/*
 	 * get_ticks() returns a long long (64 bit), it wraps in
-	 * 2^64 / CONFIG_MX25_CLK32 = 2^64 / 2^15 = 2^49 ~ 5 * 10^14 (s) ~
+	 * 2^64 / MXC_CLK32 = 2^64 / 2^15 = 2^49 ~ 5 * 10^14 (s) ~
 	 * 5 * 10^9 days... and get_ticks() * CONFIG_SYS_HZ wraps in
 	 * 5 * 10^6 days - long enough.
 	 */
diff --git u-boot-imx-88e73dd.orig/arch/arm/include/asm/arch-mx35/clock.h u-boot-imx-88e73dd/arch/arm/include/asm/arch-mx35/clock.h
index 0575dad..60285df 100644
--- u-boot-imx-88e73dd.orig/arch/arm/include/asm/arch-mx35/clock.h
+++ u-boot-imx-88e73dd/arch/arm/include/asm/arch-mx35/clock.h
@@ -24,6 +24,20 @@
 #ifndef __ASM_ARCH_CLOCK_H
 #define __ASM_ARCH_CLOCK_H
 
+#include <common.h>
+
+#ifdef CONFIG_MX35_HCLK_FREQ
+#define MXC_HCLK	CONFIG_MX35_HCLK_FREQ
+#else
+#define MXC_HCLK	24000000
+#endif
+
+#ifdef CONFIG_MX35_CLK32
+#define MXC_CLK32	CONFIG_MX35_CLK32
+#else
+#define MXC_CLK32	32768
+#endif
+
 enum mxc_clock {
 	MXC_ARM_CLK,
 	MXC_AHB_CLK,
diff --git u-boot-imx-88e73dd.orig/include/configs/flea3.h u-boot-imx-88e73dd/include/configs/flea3.h
index e8e3c6a..815e2c5 100644
--- u-boot-imx-88e73dd.orig/include/configs/flea3.h
+++ u-boot-imx-88e73dd/include/configs/flea3.h
@@ -31,7 +31,6 @@
  /* High Level Configuration Options */
 #define CONFIG_ARM1136	/* This is an arm1136 CPU core */
 #define CONFIG_MX35
-#define CONFIG_MX35_HCLK_FREQ	24000000
 
 #define CONFIG_SYS_DCACHE_OFF
 #define CONFIG_SYS_CACHELINE_SIZE	32
diff --git u-boot-imx-88e73dd.orig/include/configs/mx35pdk.h u-boot-imx-88e73dd/include/configs/mx35pdk.h
index f930ed0..751a1e3 100644
--- u-boot-imx-88e73dd.orig/include/configs/mx35pdk.h
+++ u-boot-imx-88e73dd/include/configs/mx35pdk.h
@@ -31,7 +31,6 @@
  /* High Level Configuration Options */
 #define CONFIG_ARM1136	/* This is an arm1136 CPU core */
 #define CONFIG_MX35
-#define CONFIG_MX35_HCLK_FREQ	24000000
 
 #define CONFIG_DISPLAY_CPUINFO
 

  reply	other threads:[~2012-08-21 21:07 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-14 19:53 [U-Boot] [PATCH] mx35 timer: Switch to 32-kHz source Benoît Thébaudeau
2012-08-17 19:51 ` Stefano Babic
2012-08-21 21:07   ` Benoît Thébaudeau [this message]
2012-08-21 21:07     ` [U-Boot] [PATCH v2 2/2] " Benoît Thébaudeau
2012-08-22  7:32       ` Stefano Babic
2012-08-22  7:32     ` [U-Boot] [PATCH v2 1/2] mx35: Define default SoC input clock frequencies Stefano Babic
2012-08-27  6:34     ` Stefano Babic
2012-08-27 13:26       ` Benoît Thébaudeau
2012-08-27 14:39         ` Stefano Babic

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