[RFC 1/8] ARM: OMAP: Rearranging EMIF4 definitions

[RFC 1/8] ARM: OMAP: Rearranging EMIF4 definitions

[Alexander Shiyan]

Currently we have three different definitions for EMIF management:
- Offsets
- Offsets relative to the base address
- Offsets in the structure

The patch represents the first attempt to unify this.

Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
---
 arch/arm/boards/afi-gf/lowlevel.c             | 39 +++++++++---------
 arch/arm/mach-omap/am33xx_generic.c           | 41 +++++++++----------
 .../mach-omap/include/mach/am33xx-silicon.h   | 10 +----
 3 files changed, 42 insertions(+), 48 deletions(-)

diff --git a/arch/arm/boards/afi-gf/lowlevel.c b/arch/arm/boards/afi-gf/lowlevel.c
index de40f6c5af..88ffcfae5b 100644
--- a/arch/arm/boards/afi-gf/lowlevel.c
+++ b/arch/arm/boards/afi-gf/lowlevel.c
@@ -130,34 +130,35 @@ static void board_config_vtp(void)
 
 static void board_config_emif_ddr(void)
 {
+	const void __iomem *emif4 = IOMEM(AM33XX_EMIF4_BASE);
 	u32 i;
 
 	/*Program EMIF0 CFG Registers*/
-	__raw_writel(EMIF_READ_LATENCY, AM33XX_EMIF4_0_REG(DDR_PHY_CTRL_1));
-	__raw_writel(EMIF_READ_LATENCY, AM33XX_EMIF4_0_REG(DDR_PHY_CTRL_1_SHADOW));
-	__raw_writel(EMIF_READ_LATENCY, AM33XX_EMIF4_0_REG(DDR_PHY_CTRL_2));
-	__raw_writel(EMIF_TIM1, AM33XX_EMIF4_0_REG(SDRAM_TIM_1));
-	__raw_writel(EMIF_TIM1, AM33XX_EMIF4_0_REG(SDRAM_TIM_1_SHADOW));
-	__raw_writel(EMIF_TIM2, AM33XX_EMIF4_0_REG(SDRAM_TIM_2));
-	__raw_writel(EMIF_TIM2, AM33XX_EMIF4_0_REG(SDRAM_TIM_2_SHADOW));
-	__raw_writel(EMIF_TIM3, AM33XX_EMIF4_0_REG(SDRAM_TIM_3));
-	__raw_writel(EMIF_TIM3, AM33XX_EMIF4_0_REG(SDRAM_TIM_3_SHADOW));
-
-	__raw_writel(EMIF_SDCFG, AM33XX_EMIF4_0_REG(SDRAM_CONFIG));
-	__raw_writel(EMIF_SDCFG, AM33XX_EMIF4_0_REG(SDRAM_CONFIG2));
-
-	__raw_writel(0x00004650, AM33XX_EMIF4_0_REG(SDRAM_REF_CTRL));
-	__raw_writel(0x00004650, AM33XX_EMIF4_0_REG(SDRAM_REF_CTRL_SHADOW));
+	__raw_writel(EMIF_READ_LATENCY, emif4 + EMIF4_DDR_PHY_CTRL_1);
+	__raw_writel(EMIF_READ_LATENCY, emif4 + EMIF4_DDR_PHY_CTRL_1_SHADOW);
+	__raw_writel(EMIF_READ_LATENCY, emif4 + EMIF4_DDR_PHY_CTRL_2);
+	__raw_writel(EMIF_TIM1, emif4 + EMIF4_SDRAM_TIM_1);
+	__raw_writel(EMIF_TIM1, emif4 + EMIF4_SDRAM_TIM_1_SHADOW);
+	__raw_writel(EMIF_TIM2, emif4 + EMIF4_SDRAM_TIM_2);
+	__raw_writel(EMIF_TIM2, emif4 + EMIF4_SDRAM_TIM_2_SHADOW);
+	__raw_writel(EMIF_TIM3, emif4 + EMIF4_SDRAM_TIM_3);
+	__raw_writel(EMIF_TIM3, emif4 + EMIF4_SDRAM_TIM_3_SHADOW);
+
+	__raw_writel(EMIF_SDCFG, emif4 + EMIF4_SDRAM_CONFIG);
+	__raw_writel(EMIF_SDCFG, emif4 + EMIF4_SDRAM_CONFIG2);
+
+	__raw_writel(0x00004650, emif4 + EMIF4_SDRAM_REF_CTRL);
+	__raw_writel(0x00004650, emif4 + EMIF4_SDRAM_REF_CTRL_SHADOW);
 
 	for (i = 0; i < 5000; i++) {
 
 	}
 
-	__raw_writel(EMIF_SDREF, AM33XX_EMIF4_0_REG(SDRAM_REF_CTRL));
-	__raw_writel(EMIF_SDREF, AM33XX_EMIF4_0_REG(SDRAM_REF_CTRL_SHADOW));
+	__raw_writel(EMIF_SDREF, emif4 + EMIF4_SDRAM_REF_CTRL);
+	__raw_writel(EMIF_SDREF, emif4 + EMIF4_SDRAM_REF_CTRL_SHADOW);
 
-	__raw_writel(EMIF_SDCFG, AM33XX_EMIF4_0_REG(SDRAM_CONFIG));
-	__raw_writel(EMIF_SDCFG, AM33XX_EMIF4_0_REG(SDRAM_CONFIG2));
+	__raw_writel(EMIF_SDCFG, emif4 + EMIF4_SDRAM_CONFIG);
+	__raw_writel(EMIF_SDCFG, emif4 + EMIF4_SDRAM_CONFIG2);
 }
 
 static void board_config_ddr(void)
diff --git a/arch/arm/mach-omap/am33xx_generic.c b/arch/arm/mach-omap/am33xx_generic.c
index 3c5cdf065c..896968f2f3 100644
--- a/arch/arm/mach-omap/am33xx_generic.c
+++ b/arch/arm/mach-omap/am33xx_generic.c
@@ -307,18 +307,20 @@ void am33xx_ddr_phydata_cmd_macro(const struct am33xx_cmd_control *cmd_ctrl)
 
 void am33xx_config_sdram(const struct am33xx_emif_regs *regs)
 {
-	writel(regs->emif_read_latency, AM33XX_EMIF4_0_REG(DDR_PHY_CTRL_1));
-	writel(regs->emif_read_latency, AM33XX_EMIF4_0_REG(DDR_PHY_CTRL_1_SHADOW));
-	writel(regs->emif_read_latency, AM33XX_EMIF4_0_REG(DDR_PHY_CTRL_2));
-	writel(regs->emif_tim1, AM33XX_EMIF4_0_REG(SDRAM_TIM_1));
-	writel(regs->emif_tim1, AM33XX_EMIF4_0_REG(SDRAM_TIM_1_SHADOW));
-	writel(regs->emif_tim2, AM33XX_EMIF4_0_REG(SDRAM_TIM_2));
-	writel(regs->emif_tim2, AM33XX_EMIF4_0_REG(SDRAM_TIM_2_SHADOW));
-	writel(regs->emif_tim3, AM33XX_EMIF4_0_REG(SDRAM_TIM_3));
-	writel(regs->emif_tim3, AM33XX_EMIF4_0_REG(SDRAM_TIM_3_SHADOW));
+	const void __iomem *emif4 = IOMEM(AM33XX_EMIF4_BASE);
+
+	writel(regs->emif_read_latency, emif4 + EMIF4_DDR_PHY_CTRL_1);
+	writel(regs->emif_read_latency, emif4 + EMIF4_DDR_PHY_CTRL_1_SHADOW);
+	writel(regs->emif_read_latency, emif4 + EMIF4_DDR_PHY_CTRL_2);
+	writel(regs->emif_tim1, emif4 + EMIF4_SDRAM_TIM_1);
+	writel(regs->emif_tim1, emif4 + EMIF4_SDRAM_TIM_1_SHADOW);
+	writel(regs->emif_tim2, emif4 + EMIF4_SDRAM_TIM_2);
+	writel(regs->emif_tim2, emif4 + EMIF4_SDRAM_TIM_2_SHADOW);
+	writel(regs->emif_tim3, emif4 + EMIF4_SDRAM_TIM_3);
+	writel(regs->emif_tim3, emif4 + EMIF4_SDRAM_TIM_3_SHADOW);
 
 	if (regs->ocp_config)
-		writel(regs->ocp_config, AM33XX_EMIF4_0_REG(OCP_CONFIG));
+		writel(regs->ocp_config, emif4 + EMIF4_OCP_CONFIG);
 
 	if (regs->zq_config) {
 		/*
@@ -326,20 +328,17 @@ void am33xx_config_sdram(const struct am33xx_emif_regs *regs)
 		 * about 570us for a delay, which will be long enough
 		 * to configure things.
 		 */
-		writel(0x2800, AM33XX_EMIF4_0_REG(SDRAM_REF_CTRL));
-		writel(regs->zq_config, AM33XX_EMIF4_0_REG(ZQ_CONFIG));
+		writel(0x2800, emif4 + EMIF4_SDRAM_REF_CTRL);
+		writel(regs->zq_config, emif4 + EMIF4_ZQ_CONFIG);
 		writel(regs->sdram_config, CM_EMIF_SDRAM_CONFIG);
-		writel(regs->sdram_config, AM33XX_EMIF4_0_REG(SDRAM_CONFIG));
-		writel(regs->sdram_ref_ctrl,
-				AM33XX_EMIF4_0_REG(SDRAM_REF_CTRL));
-		writel(regs->sdram_ref_ctrl,
-			AM33XX_EMIF4_0_REG(SDRAM_REF_CTRL_SHADOW));
-
+		writel(regs->sdram_config, emif4 + EMIF4_SDRAM_CONFIG);
+		writel(regs->sdram_ref_ctrl, emif4 + EMIF4_SDRAM_REF_CTRL);
+		writel(regs->sdram_ref_ctrl, emif4 + EMIF4_SDRAM_REF_CTRL_SHADOW);
 	}
 
-	writel(regs->sdram_ref_ctrl, AM33XX_EMIF4_0_REG(SDRAM_REF_CTRL));
-	writel(regs->sdram_ref_ctrl, AM33XX_EMIF4_0_REG(SDRAM_REF_CTRL_SHADOW));
-	writel(regs->sdram_config, AM33XX_EMIF4_0_REG(SDRAM_CONFIG));
+	writel(regs->sdram_ref_ctrl, emif4 + EMIF4_SDRAM_REF_CTRL);
+	writel(regs->sdram_ref_ctrl, emif4 + EMIF4_SDRAM_REF_CTRL_SHADOW);
+	writel(regs->sdram_config, emif4 + EMIF4_SDRAM_CONFIG);
 }
 
 /**
diff --git a/arch/arm/mach-omap/include/mach/am33xx-silicon.h b/arch/arm/mach-omap/include/mach/am33xx-silicon.h
index 0467dac03b..d090b0f29c 100644
--- a/arch/arm/mach-omap/include/mach/am33xx-silicon.h
+++ b/arch/arm/mach-omap/include/mach/am33xx-silicon.h
@@ -37,9 +37,6 @@
 #define AM33XX_GPIO2_BASE		(AM33XX_L4_PER_BASE + 0x1AC000 + 0x100)
 #define AM33XX_GPIO3_BASE		(AM33XX_L4_PER_BASE + 0x1AE000 + 0x100)
 
-/* EMFI Registers */
-#define AM33XX_EMFI0_BASE		0x4C000000
-
 #define AM33XX_DRAM_ADDR_SPACE_START	0x80000000
 #define AM33XX_DRAM_ADDR_SPACE_END	0xC0000000
 
@@ -83,8 +80,8 @@
 #define AM33XX_WDT_BASE			0x44E35000
 
 /* EMIF Base address */
-#define AM33XX_EMIF4_0_CFG_BASE		0x4C000000
-#define AM33XX_EMIF4_1_CFG_BASE		0x4D000000
+#define AM33XX_EMIF4_BASE		0x4c000000
+
 #define AM33XX_DMM_BASE			0x4E000000
 
 #define AM335X_CPSW_BASE		0x4A100000
@@ -97,9 +94,6 @@
 #define AM33XX_DMM_LISA_MAP__3		(AM33XX_DMM_BASE + 0x4C)
 #define AM33XX_DMM_PAT_BASE_ADDR	(AM33XX_DMM_BASE + 0x460)
 
-#define AM33XX_EMIF4_0_REG(REGNAME)	(AM33XX_EMIF4_0_CFG_BASE + EMIF4_##REGNAME)
-#define AM33XX_EMIF4_1_REG(REGNAME)	(AM33XX_EMIF4_1_CFG_BASE + EMIF4_##REGNAME)
-
 #define EMIF4_MOD_ID_REV		0x0
 #define EMIF4_SDRAM_STATUS		0x04
 #define EMIF4_SDRAM_CONFIG		0x08
-- 
2.32.0


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[RFC 2/8] ARM: OMAP: Move EMIF4 definitions to appropriate header

[Alexander Shiyan]

Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
---
 arch/arm/boards/afi-gf/lowlevel.c             |  1 +
 arch/arm/mach-omap/am33xx_generic.c           |  1 +
 .../mach-omap/include/mach/am33xx-silicon.h   | 21 -------------------
 arch/arm/mach-omap/include/mach/emif4.h       | 21 +++++++++++++++++++
 4 files changed, 23 insertions(+), 21 deletions(-)

diff --git a/arch/arm/boards/afi-gf/lowlevel.c b/arch/arm/boards/afi-gf/lowlevel.c
index 88ffcfae5b..d28cc8fad3 100644
--- a/arch/arm/boards/afi-gf/lowlevel.c
+++ b/arch/arm/boards/afi-gf/lowlevel.c
@@ -10,6 +10,7 @@
 #include <mach/am33xx-generic.h>
 #include <mach/am33xx-silicon.h>
 #include <mach/am33xx-clock.h>
+#include <mach/emif4.h>
 #include <mach/sdrc.h>
 #include <mach/sys_info.h>
 #include <mach/syslib.h>
diff --git a/arch/arm/mach-omap/am33xx_generic.c b/arch/arm/mach-omap/am33xx_generic.c
index 896968f2f3..bdfa0e9e26 100644
--- a/arch/arm/mach-omap/am33xx_generic.c
+++ b/arch/arm/mach-omap/am33xx_generic.c
@@ -23,6 +23,7 @@
 #include <asm/barebox-arm.h>
 #include <mach/am33xx-silicon.h>
 #include <mach/am33xx-clock.h>
+#include <mach/emif4.h>
 #include <mach/generic.h>
 #include <mach/sys_info.h>
 #include <mach/am33xx-generic.h>
diff --git a/arch/arm/mach-omap/include/mach/am33xx-silicon.h b/arch/arm/mach-omap/include/mach/am33xx-silicon.h
index d090b0f29c..671706ff49 100644
--- a/arch/arm/mach-omap/include/mach/am33xx-silicon.h
+++ b/arch/arm/mach-omap/include/mach/am33xx-silicon.h
@@ -94,27 +94,6 @@
 #define AM33XX_DMM_LISA_MAP__3		(AM33XX_DMM_BASE + 0x4C)
 #define AM33XX_DMM_PAT_BASE_ADDR	(AM33XX_DMM_BASE + 0x460)
 
-#define EMIF4_MOD_ID_REV		0x0
-#define EMIF4_SDRAM_STATUS		0x04
-#define EMIF4_SDRAM_CONFIG		0x08
-#define EMIF4_SDRAM_CONFIG2		0x0C
-#define EMIF4_SDRAM_REF_CTRL		0x10
-#define EMIF4_SDRAM_REF_CTRL_SHADOW	0x14
-#define EMIF4_SDRAM_TIM_1		0x18
-#define EMIF4_SDRAM_TIM_1_SHADOW	0x1C
-#define EMIF4_SDRAM_TIM_2		0x20
-#define EMIF4_SDRAM_TIM_2_SHADOW	0x24
-#define EMIF4_SDRAM_TIM_3		0x28
-#define EMIF4_SDRAM_TIM_3_SHADOW	0x2C
-#define EMIF0_SDRAM_MGMT_CTRL		0x38
-#define EMIF0_SDRAM_MGMT_CTRL_SHD	0x3C
-#define EMIF4_OCP_CONFIG		0x54
-#define EMIF4_ZQ_CONFIG			0xC8
-#define EMIF4_DDR_PHY_CTRL_1		0xE4
-#define EMIF4_DDR_PHY_CTRL_1_SHADOW	0xE8
-#define EMIF4_DDR_PHY_CTRL_2		0xEC
-#define EMIF4_IODFT_TLGC		0x60
-
 #define AM33XX_VTP0_CTRL_REG		0x44E10E0C
 #define AM33XX_VTP1_CTRL_REG		0x48140E10
 
diff --git a/arch/arm/mach-omap/include/mach/emif4.h b/arch/arm/mach-omap/include/mach/emif4.h
index 1f9c2938a1..559443c9a6 100644
--- a/arch/arm/mach-omap/include/mach/emif4.h
+++ b/arch/arm/mach-omap/include/mach/emif4.h
@@ -24,6 +24,27 @@
 #ifndef _EMIF_H_
 #define _EMIF_H_
 
+#define EMIF4_MOD_ID_REV					0x0
+#define EMIF4_STATUS						0x04
+#define EMIF4_SDRAM_CONFIG					0x08
+#define EMIF4_SDRAM_CONFIG2					0x0c
+#define EMIF4_SDRAM_REF_CTRL					0x10
+#define EMIF4_SDRAM_REF_CTRL_SHADOW				0x14
+#define EMIF4_SDRAM_TIM_1					0x18
+#define EMIF4_SDRAM_TIM_1_SHADOW				0x1c
+#define EMIF4_SDRAM_TIM_2					0x20
+#define EMIF4_SDRAM_TIM_2_SHADOW				0x24
+#define EMIF4_SDRAM_TIM_3					0x28
+#define EMIF4_SDRAM_TIM_3_SHADOW				0x2c
+#define EMIF4_POWER_MANAGEMENT_CTRL				0x38
+#define EMIF4_POWER_MANAGEMENT_CTRL_SHADOW			0x3c
+#define EMIF4_OCP_CONFIG					0x54
+#define EMIF4_ZQ_CONFIG						0xc8
+#define EMIF4_DDR_PHY_CTRL_1					0xe4
+#define EMIF4_DDR_PHY_CTRL_1_SHADOW				0xe8
+#define EMIF4_DDR_PHY_CTRL_2					0xec
+#define EMIF4_IODFT_TLGC					0x60
+
 /*
  * Configuration values
  */
-- 
2.32.0


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[RFC 3/8] ARM: OMAP: Adopt am35xx_emif4_init() to use fixed offset definitions

[Alexander Shiyan]

Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
---
 arch/arm/mach-omap/am35xx_emif4.c       | 40 ++++++++++++-------------
 arch/arm/mach-omap/include/mach/emif4.h | 24 ---------------
 2 files changed, 20 insertions(+), 44 deletions(-)

diff --git a/arch/arm/mach-omap/am35xx_emif4.c b/arch/arm/mach-omap/am35xx_emif4.c
index 678a338fd6..8780dfb539 100644
--- a/arch/arm/mach-omap/am35xx_emif4.c
+++ b/arch/arm/mach-omap/am35xx_emif4.c
@@ -21,58 +21,58 @@
  */
 void am35xx_emif4_init(void)
 {
+	const void __iomem *emif4 = IOMEM(OMAP3_SDRC_BASE);
 	unsigned int regval;
-	struct emif4 *emif4_base = IOMEM(OMAP3_SDRC_BASE);
 
 	/* Set the DDR PHY parameters in PHY ctrl registers */
 	regval = (EMIF4_DDR1_READ_LAT | EMIF4_DDR1_PWRDN_DIS |
 		EMIF4_DDR1_EXT_STRB_DIS);
-	writel(regval, &emif4_base->ddr_phyctrl1);
-	writel(regval, &emif4_base->ddr_phyctrl1_shdw);
-	writel(0, &emif4_base->ddr_phyctrl2);
+	writel(regval, emif4 + EMIF4_DDR_PHY_CTRL_1);
+	writel(regval, emif4 + EMIF4_DDR_PHY_CTRL_1_SHADOW);
+	writel(0, emif4 + EMIF4_DDR_PHY_CTRL_2);
 
 	/* Reset the DDR PHY and wait till completed */
-	regval = readl(&emif4_base->sdram_iodft_tlgc);
+	regval = readl(emif4 + EMIF4_IODFT_TLGC);
 	regval |= (1 << 10);
-	writel(regval, &emif4_base->sdram_iodft_tlgc);
+	writel(regval, emif4 + EMIF4_IODFT_TLGC);
 
 	/* Wait till that bit clears*/
-	while (readl(&emif4_base->sdram_iodft_tlgc) & (1 << 10));
+	while (readl(emif4 + EMIF4_IODFT_TLGC) & (1 << 10));
 
 	/* Re-verify the DDR PHY status*/
-	while ((readl(&emif4_base->sdram_sts) & (1 << 2)) == 0x0);
+	while ((readl(emif4 + EMIF4_STATUS) & (1 << 2)) == 0x0);
 
 	regval |= (1 << 0);
-	writel(regval, &emif4_base->sdram_iodft_tlgc);
+	writel(regval, emif4 + EMIF4_IODFT_TLGC);
 
 	/* Set SDR timing registers */
 	regval = (EMIF4_TIM1_T_WTR | EMIF4_TIM1_T_RRD |
 		EMIF4_TIM1_T_RC | EMIF4_TIM1_T_RAS |
 		EMIF4_TIM1_T_WR | EMIF4_TIM1_T_RCD |
 		EMIF4_TIM1_T_RP);
-	writel(regval, &emif4_base->sdram_time1);
-	writel(regval, &emif4_base->sdram_time1_shdw);
+	writel(regval, emif4 + EMIF4_SDRAM_TIM_1);
+	writel(regval, emif4 + EMIF4_SDRAM_TIM_1_SHADOW);
 
 	regval = (EMIF4_TIM2_T_CKE | EMIF4_TIM2_T_RTP |
 		EMIF4_TIM2_T_XSRD | EMIF4_TIM2_T_XSNR |
 		EMIF4_TIM2_T_ODT | EMIF4_TIM2_T_XP);
-	writel(regval, &emif4_base->sdram_time2);
-	writel(regval, &emif4_base->sdram_time2_shdw);
+	writel(regval, emif4 + EMIF4_SDRAM_TIM_2);
+	writel(regval, emif4 + EMIF4_SDRAM_TIM_2_SHADOW);
 
 	regval = (EMIF4_TIM3_T_RAS_MAX | EMIF4_TIM3_T_RFC);
-	writel(regval, &emif4_base->sdram_time3);
-	writel(regval, &emif4_base->sdram_time3_shdw);
+	writel(regval, emif4 + EMIF4_SDRAM_TIM_3);
+	writel(regval, emif4 + EMIF4_SDRAM_TIM_3_SHADOW);
 
 	/* Set the PWR control register */
 	regval = (EMIF4_PWR_PM_TIM | EMIF4_PWR_LP_MODE |
 		EMIF4_PWR_DPD_DIS | EMIF4_PWR_IDLE_MODE);
-	writel(regval, &emif4_base->sdram_pwr_mgmt);
-	writel(regval, &emif4_base->sdram_pwr_mgmt_shdw);
+	writel(regval, emif4 + EMIF4_POWER_MANAGEMENT_CTRL);
+	writel(regval, emif4 + EMIF4_POWER_MANAGEMENT_CTRL_SHADOW);
 
 	/* Set the DDR refresh rate control register */
 	regval = (EMIF4_REFRESH_RATE | EMIF4_INITREF_DIS);
-	writel(regval, &emif4_base->sdram_refresh_ctrl);
-	writel(regval, &emif4_base->sdram_refresh_ctrl_shdw);
+	writel(regval, emif4 + EMIF4_SDRAM_REF_CTRL);
+	writel(regval, emif4 + EMIF4_SDRAM_REF_CTRL_SHADOW);
 
 	/* set the SDRAM configuration register */
 	regval = (EMIF4_CFG_PGSIZE | EMIF4_CFG_EBANK |
@@ -81,5 +81,5 @@ void am35xx_emif4_init(void)
 		EMIF4_CFG_SDR_DRV | EMIF4_CFG_DDR_DIS_DLL |
 		EMIF4_CFG_DDR2_DDQS | EMIF4_CFG_DDR_TERM |
 		EMIF4_CFG_IBANK_POS | EMIF4_CFG_SDRAM_TYP);
-	writel(regval, &emif4_base->sdram_config);
+	writel(regval, emif4 + EMIF4_SDRAM_CONFIG);
 }
diff --git a/arch/arm/mach-omap/include/mach/emif4.h b/arch/arm/mach-omap/include/mach/emif4.h
index 559443c9a6..06dabc5939 100644
--- a/arch/arm/mach-omap/include/mach/emif4.h
+++ b/arch/arm/mach-omap/include/mach/emif4.h
@@ -97,30 +97,6 @@
 #define EMIF4_DDR1_PWRDN_EN	(0x1 << 6)
 #define EMIF4_DDR1_READ_LAT	(0x6 << 0)
 
-struct emif4 {
-	unsigned int emif_mod_id_rev;
-	unsigned int sdram_sts;
-	unsigned int sdram_config;
-	unsigned int res1;
-	unsigned int sdram_refresh_ctrl;
-	unsigned int sdram_refresh_ctrl_shdw;
-	unsigned int sdram_time1;
-	unsigned int sdram_time1_shdw;
-	unsigned int sdram_time2;
-	unsigned int sdram_time2_shdw;
-	unsigned int sdram_time3;
-	unsigned int sdram_time3_shdw;
-	unsigned char res2[8];
-	unsigned int sdram_pwr_mgmt;
-	unsigned int sdram_pwr_mgmt_shdw;
-	unsigned char res3[32];
-	unsigned int sdram_iodft_tlgc;
-	unsigned char res4[128];
-	unsigned int ddr_phyctrl1;
-	unsigned int ddr_phyctrl1_shdw;
-	unsigned int ddr_phyctrl2;
-};
-
 void am35xx_emif4_init(void);
 
 #endif /* endif _EMIF_H_ */
-- 
2.32.0


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[RFC 4/8] ARM: OMAP: Move locally used definitions from emif4 header to am35xx_emif4

[Alexander Shiyan]

Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
---
 arch/arm/mach-omap/am35xx_emif4.c       | 53 ++++++++++++++++++++++++-
 arch/arm/mach-omap/include/mach/emif4.h | 52 ------------------------
 2 files changed, 52 insertions(+), 53 deletions(-)

diff --git a/arch/arm/mach-omap/am35xx_emif4.c b/arch/arm/mach-omap/am35xx_emif4.c
index 8780dfb539..bd4fbd21e3 100644
--- a/arch/arm/mach-omap/am35xx_emif4.c
+++ b/arch/arm/mach-omap/am35xx_emif4.c
@@ -15,7 +15,58 @@
 #include <mach/omap3-silicon.h>
 
 /*
- * do_pac200_emif4_init -
+ * AM35xx configuration values
+ */
+#define EMIF4_TIM1_T_RP		(0x3 << 25)
+#define EMIF4_TIM1_T_RCD	(0x3 << 21)
+#define EMIF4_TIM1_T_WR		(0x3 << 17)
+#define EMIF4_TIM1_T_RAS	(0x7 << 12)
+#define EMIF4_TIM1_T_RC		(0xa << 6)
+#define EMIF4_TIM1_T_RRD	(0x2 << 3)
+#define EMIF4_TIM1_T_WTR	(0x2)
+
+#define EMIF4_TIM2_T_XP		(0x2 << 28)
+#define EMIF4_TIM2_T_ODT	(0x0 << 25)
+#define EMIF4_TIM2_T_XSNR	(0x1c << 16)
+#define EMIF4_TIM2_T_XSRD	(0xc8 << 6)
+#define EMIF4_TIM2_T_RTP	(0x1 << 3)
+#define EMIF4_TIM2_T_CKE	(0x2)
+
+#define EMIF4_TIM3_T_RFC	(0x15 << 4)
+#define EMIF4_TIM3_T_RAS_MAX	(0xf)
+
+#define EMIF4_PWR_IDLE_MODE	(0x2 << 30)
+#define EMIF4_PWR_DPD_DIS	(0x0 << 10)
+#define EMIF4_PWR_DPD_EN	(0x1 << 10)
+#define EMIF4_PWR_LP_MODE	(0x0 << 8)
+#define EMIF4_PWR_PM_TIM	(0x0)
+
+#define EMIF4_INITREF_DIS	(0x0 << 31)
+#define EMIF4_REFRESH_RATE	(0x257)
+
+#define EMIF4_CFG_SDRAM_TYP	(0x2 << 29)
+#define EMIF4_CFG_IBANK_POS	(0x0 << 27)
+#define EMIF4_CFG_DDR_TERM	(0x3 << 24)
+#define EMIF4_CFG_DDR2_DDQS	(0x1 << 23)
+#define EMIF4_CFG_DDR_DIS_DLL	(0x0 << 20)
+#define EMIF4_CFG_SDR_DRV	(0x0 << 18)
+#define EMIF4_CFG_NARROW_MD	(0x0 << 14)
+#define EMIF4_CFG_CL		(0x5 << 10)
+#define EMIF4_CFG_ROWSIZE	(0x0 << 7)
+#define EMIF4_CFG_IBANK		(0x3 << 4)
+#define EMIF4_CFG_EBANK		(0x0 << 3)
+#define EMIF4_CFG_PGSIZE	(0x2)
+
+/*
+ * EMIF4 PHY Control 1 register configuration
+ */
+#define EMIF4_DDR1_EXT_STRB_EN	(0x1 << 7)
+#define EMIF4_DDR1_EXT_STRB_DIS	(0x0 << 7)
+#define EMIF4_DDR1_PWRDN_DIS	(0x0 << 6)
+#define EMIF4_DDR1_PWRDN_EN	(0x1 << 6)
+#define EMIF4_DDR1_READ_LAT	(0x6 << 0)
+
+/*
  *  - Init the emif4 module for DDR access
  *  - Early init routines, called from flash or SRAM.
  */
diff --git a/arch/arm/mach-omap/include/mach/emif4.h b/arch/arm/mach-omap/include/mach/emif4.h
index 06dabc5939..23d5c18fcf 100644
--- a/arch/arm/mach-omap/include/mach/emif4.h
+++ b/arch/arm/mach-omap/include/mach/emif4.h
@@ -45,58 +45,6 @@
 #define EMIF4_DDR_PHY_CTRL_2					0xec
 #define EMIF4_IODFT_TLGC					0x60
 
-/*
- * Configuration values
- */
-#define EMIF4_TIM1_T_RP		(0x3 << 25)
-#define EMIF4_TIM1_T_RCD	(0x3 << 21)
-#define EMIF4_TIM1_T_WR		(0x3 << 17)
-#define EMIF4_TIM1_T_RAS	(0x7 << 12) /* 8->7 */
-#define EMIF4_TIM1_T_RC		(0xA << 6)
-#define EMIF4_TIM1_T_RRD	(0x2 << 3)
-#define EMIF4_TIM1_T_WTR	(0x2)
-
-#define EMIF4_TIM2_T_XP		(0x2 << 28)
-#define EMIF4_TIM2_T_ODT	(0x0 << 25) /* 2? */
-#define EMIF4_TIM2_T_XSNR	(0x1C << 16)
-#define EMIF4_TIM2_T_XSRD	(0xC8 << 6)
-#define EMIF4_TIM2_T_RTP	(0x1 << 3)
-#define EMIF4_TIM2_T_CKE	(0x2)
-
-#define EMIF4_TIM3_T_RFC	(0x15 << 4) /* 25->15 */
-#define EMIF4_TIM3_T_RAS_MAX	(0xf)	    /* 7->f */
-
-#define EMIF4_PWR_IDLE_MODE	(0x2 << 30)
-#define EMIF4_PWR_DPD_DIS	(0x0 << 10)
-#define EMIF4_PWR_DPD_EN	(0x1 << 10)
-#define EMIF4_PWR_LP_MODE	(0x0 << 8)
-#define EMIF4_PWR_PM_TIM	(0x0)
-
-#define EMIF4_INITREF_DIS	(0x0 << 31)
-#define EMIF4_REFRESH_RATE	(0x257) /* 50f->257 */
-
-#define EMIF4_CFG_SDRAM_TYP	(0x2 << 29)
-#define EMIF4_CFG_IBANK_POS	(0x0 << 27)
-#define EMIF4_CFG_DDR_TERM	(0x3 << 24) /* --> 0x3 */
-#define EMIF4_CFG_DDR2_DDQS	(0x1 << 23)
-#define EMIF4_CFG_DDR_DIS_DLL	(0x0 << 20)
-#define EMIF4_CFG_SDR_DRV	(0x0 << 18)
-#define EMIF4_CFG_NARROW_MD	(0x0 << 14)
-#define EMIF4_CFG_CL		(0x5 << 10)
-#define EMIF4_CFG_ROWSIZE	(0x0 << 7) /* --> 0x4: a0..a12 */
-#define EMIF4_CFG_IBANK		(0x3 << 4)
-#define EMIF4_CFG_EBANK		(0x0 << 3)
-#define EMIF4_CFG_PGSIZE	(0x2)      /* 10 columns */
-
-/*
- * EMIF4 PHY Control 1 register configuration
- */
-#define EMIF4_DDR1_EXT_STRB_EN	(0x1 << 7)
-#define EMIF4_DDR1_EXT_STRB_DIS	(0x0 << 7)
-#define EMIF4_DDR1_PWRDN_DIS	(0x0 << 6)
-#define EMIF4_DDR1_PWRDN_EN	(0x1 << 6)
-#define EMIF4_DDR1_READ_LAT	(0x6 << 0)
-
 void am35xx_emif4_init(void);
 
 #endif /* endif _EMIF_H_ */
-- 
2.32.0


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[RFC 5/8] ARM: OMAP: emif: Abstract am35xx_emif4 from any CPU-specific includes

[Alexander Shiyan]

Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
---
 arch/arm/boards/wago-pfc-am35xx/lowlevel.c | 2 +-
 arch/arm/mach-omap/am35xx_emif4.c          | 4 +---
 arch/arm/mach-omap/include/mach/emif4.h    | 2 +-
 3 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/arch/arm/boards/wago-pfc-am35xx/lowlevel.c b/arch/arm/boards/wago-pfc-am35xx/lowlevel.c
index 7da8fd0331..63afd043a0 100644
--- a/arch/arm/boards/wago-pfc-am35xx/lowlevel.c
+++ b/arch/arm/boards/wago-pfc-am35xx/lowlevel.c
@@ -200,7 +200,7 @@ static noinline void pfc200_board_init(void)
 
 	/* Dont reconfigure SDRAM while running in SDRAM */
 	if (!in_sdram)
-		am35xx_emif4_init();
+		am35xx_emif4_init(IOMEM(OMAP3_SDRC_BASE));
 
 	barebox_arm_entry(0x80000000, SZ_256M, NULL);
 }
diff --git a/arch/arm/mach-omap/am35xx_emif4.c b/arch/arm/mach-omap/am35xx_emif4.c
index bd4fbd21e3..e61cf00c57 100644
--- a/arch/arm/mach-omap/am35xx_emif4.c
+++ b/arch/arm/mach-omap/am35xx_emif4.c
@@ -12,7 +12,6 @@
 #include <common.h>
 #include <io.h>
 #include <mach/emif4.h>
-#include <mach/omap3-silicon.h>
 
 /*
  * AM35xx configuration values
@@ -70,9 +69,8 @@
  *  - Init the emif4 module for DDR access
  *  - Early init routines, called from flash or SRAM.
  */
-void am35xx_emif4_init(void)
+void am35xx_emif4_init(const void __iomem *emif4)
 {
-	const void __iomem *emif4 = IOMEM(OMAP3_SDRC_BASE);
 	unsigned int regval;
 
 	/* Set the DDR PHY parameters in PHY ctrl registers */
diff --git a/arch/arm/mach-omap/include/mach/emif4.h b/arch/arm/mach-omap/include/mach/emif4.h
index 23d5c18fcf..10ecfe6c6b 100644
--- a/arch/arm/mach-omap/include/mach/emif4.h
+++ b/arch/arm/mach-omap/include/mach/emif4.h
@@ -45,6 +45,6 @@
 #define EMIF4_DDR_PHY_CTRL_2					0xec
 #define EMIF4_IODFT_TLGC					0x60
 
-void am35xx_emif4_init(void);
+void am35xx_emif4_init(const void __iomem *emif4);
 
 #endif /* endif _EMIF_H_ */
-- 
2.32.0


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[RFC 6/8] ARM: OMAP: emif: Rename am35xx_emif4 unit

[Alexander Shiyan]

EMIF can be used for other CPU variants.
Let's rename it to be more generic.

Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
---
 arch/arm/mach-omap/Makefile                    | 2 +-
 arch/arm/mach-omap/{am35xx_emif4.c => emif4.c} | 0
 2 files changed, 1 insertion(+), 1 deletion(-)
 rename arch/arm/mach-omap/{am35xx_emif4.c => emif4.c} (100%)

diff --git a/arch/arm/mach-omap/Makefile b/arch/arm/mach-omap/Makefile
index e81284ec3b..2c7f577856 100644
--- a/arch/arm/mach-omap/Makefile
+++ b/arch/arm/mach-omap/Makefile
@@ -22,7 +22,7 @@ pbl-$(CONFIG_ARCH_OMAP3) += omap3_generic.o auxcr.o
 obj-$(CONFIG_ARCH_OMAP4) += omap4_generic.o omap4_clock.o
 pbl-$(CONFIG_ARCH_OMAP4) += omap4_generic.o omap4_clock.o
 obj-pbl-$(CONFIG_ARCH_AM33XX) += am33xx_generic.o am33xx_clock.o am33xx_mux.o am3xxx.o
-obj-pbl-$(CONFIG_ARCH_AM35XX) += am3xxx.o am35xx_emif4.o
+obj-pbl-$(CONFIG_ARCH_AM35XX) += am3xxx.o emif4.o
 obj-$(CONFIG_ARCH_AM33XX) += am33xx_scrm.o
 obj-$(CONFIG_ARCH_OMAP3) += omap3_clock.o
 pbl-$(CONFIG_ARCH_OMAP3) += omap3_clock.o
diff --git a/arch/arm/mach-omap/am35xx_emif4.c b/arch/arm/mach-omap/emif4.c
similarity index 100%
rename from arch/arm/mach-omap/am35xx_emif4.c
rename to arch/arm/mach-omap/emif4.c
-- 
2.32.0


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[RFC 7/8] ARM: OMAP: Use EMIF4 registers for get SDRAM size

[Alexander Shiyan]

Instead of using the registers of the control module, we will use
the EMIF registers in am335x_sdram_size().
This can help when porting this function to other CPU variants.

Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
---
 arch/arm/mach-omap/am33xx_generic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-omap/am33xx_generic.c b/arch/arm/mach-omap/am33xx_generic.c
index bdfa0e9e26..2727ebdf7f 100644
--- a/arch/arm/mach-omap/am33xx_generic.c
+++ b/arch/arm/mach-omap/am33xx_generic.c
@@ -349,9 +349,9 @@ void am33xx_config_sdram(const struct am33xx_emif_regs *regs)
  */
 unsigned long am335x_sdram_size(void)
 {
+	uint32_t sdram_config = readl(IOMEM(AM33XX_EMIF4_BASE + EMIF4_SDRAM_CONFIG));
 	int rows, cols, width, banks;
 	unsigned long size;
-	uint32_t sdram_config = readl(CM_EMIF_SDRAM_CONFIG);
 
 	rows = ((sdram_config >> 7) & 0x7) + 9;
 	cols = (sdram_config & 0x7) + 8;
-- 
2.32.0


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[RFC 8/8] ARM: OMAP: Move am33xx_sdram_size() into EMIF module and make it generic

[Alexander Shiyan]

Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
---
 arch/arm/mach-omap/Makefile                   |  2 +-
 arch/arm/mach-omap/am33xx_generic.c           | 53 +------------------
 arch/arm/mach-omap/am33xx_scrm.c              |  4 +-
 arch/arm/mach-omap/emif4.c                    | 50 +++++++++++++++++
 .../mach-omap/include/mach/am33xx-silicon.h   |  1 -
 arch/arm/mach-omap/include/mach/emif4.h       |  2 +
 6 files changed, 58 insertions(+), 54 deletions(-)

diff --git a/arch/arm/mach-omap/Makefile b/arch/arm/mach-omap/Makefile
index 2c7f577856..88c6b1d594 100644
--- a/arch/arm/mach-omap/Makefile
+++ b/arch/arm/mach-omap/Makefile
@@ -21,7 +21,7 @@ obj-$(CONFIG_ARCH_OMAP3) += omap3_generic.o auxcr.o
 pbl-$(CONFIG_ARCH_OMAP3) += omap3_generic.o auxcr.o
 obj-$(CONFIG_ARCH_OMAP4) += omap4_generic.o omap4_clock.o
 pbl-$(CONFIG_ARCH_OMAP4) += omap4_generic.o omap4_clock.o
-obj-pbl-$(CONFIG_ARCH_AM33XX) += am33xx_generic.o am33xx_clock.o am33xx_mux.o am3xxx.o
+obj-pbl-$(CONFIG_ARCH_AM33XX) += am33xx_generic.o am33xx_clock.o am33xx_mux.o am3xxx.o emif4.o
 obj-pbl-$(CONFIG_ARCH_AM35XX) += am3xxx.o emif4.o
 obj-$(CONFIG_ARCH_AM33XX) += am33xx_scrm.o
 obj-$(CONFIG_ARCH_OMAP3) += omap3_clock.o
diff --git a/arch/arm/mach-omap/am33xx_generic.c b/arch/arm/mach-omap/am33xx_generic.c
index 2727ebdf7f..bfe5b3dc73 100644
--- a/arch/arm/mach-omap/am33xx_generic.c
+++ b/arch/arm/mach-omap/am33xx_generic.c
@@ -342,59 +342,10 @@ void am33xx_config_sdram(const struct am33xx_emif_regs *regs)
 	writel(regs->sdram_config, emif4 + EMIF4_SDRAM_CONFIG);
 }
 
-/**
- * am335x_sdram_size - read back SDRAM size from sdram_config register
- *
- * @return: The SDRAM size
- */
-unsigned long am335x_sdram_size(void)
-{
-	uint32_t sdram_config = readl(IOMEM(AM33XX_EMIF4_BASE + EMIF4_SDRAM_CONFIG));
-	int rows, cols, width, banks;
-	unsigned long size;
-
-	rows = ((sdram_config >> 7) & 0x7) + 9;
-	cols = (sdram_config & 0x7) + 8;
-
-	switch ((sdram_config >> 14) & 0x3) {
-	case 0:
-		width = 4;
-		break;
-	case 1:
-		width = 2;
-		break;
-	default:
-		return 0;
-	}
-
-	switch ((sdram_config >> 4) & 0x7) {
-	case 0:
-		banks = 1;
-		break;
-	case 1:
-		banks = 2;
-		break;
-	case 2:
-		banks = 4;
-		break;
-	case 3:
-		banks = 8;
-		break;
-	default:
-		return 0;
-	}
-
-	size = (1 << rows) * (1 << cols) * banks * width;
-
-	debug("%s: sdram_config: 0x%08x cols: %2d rows: %2d width: %2d banks: %2d size: 0x%08lx\n",
-			__func__, sdram_config, cols, rows, width, banks, size);
-
-	return size;
-}
-
 void __noreturn am335x_barebox_entry(void *boarddata)
 {
-	barebox_arm_entry(0x80000000, am335x_sdram_size(), boarddata);
+	barebox_arm_entry(0x80000000,
+			  emif4_sdram_size(IOMEM(AM33XX_EMIF4_BASE)), boarddata);
 }
 
 void am33xx_config_io_ctrl(int ioctrl)
diff --git a/arch/arm/mach-omap/am33xx_scrm.c b/arch/arm/mach-omap/am33xx_scrm.c
index 0f13a9deb6..e10e80ce31 100644
--- a/arch/arm/mach-omap/am33xx_scrm.c
+++ b/arch/arm/mach-omap/am33xx_scrm.c
@@ -21,10 +21,12 @@
 #include <asm/barebox-arm.h>
 #include <asm/memory.h>
 #include <mach/am33xx-silicon.h>
+#include <mach/emif4.h>
 
 static int am33xx_scrm_probe(struct device_d *dev)
 {
-	return arm_add_mem_device("ram0", 0x80000000, am335x_sdram_size());
+	return arm_add_mem_device("ram0", 0x80000000,
+				  emif4_sdram_size(IOMEM(AM33XX_EMIF4_BASE)));
 }
 
 static __maybe_unused struct of_device_id am33xx_scrm_dt_ids[] = {
diff --git a/arch/arm/mach-omap/emif4.c b/arch/arm/mach-omap/emif4.c
index e61cf00c57..b5a53e8c63 100644
--- a/arch/arm/mach-omap/emif4.c
+++ b/arch/arm/mach-omap/emif4.c
@@ -65,6 +65,56 @@
 #define EMIF4_DDR1_PWRDN_EN	(0x1 << 6)
 #define EMIF4_DDR1_READ_LAT	(0x6 << 0)
 
+/**
+ * emif4_sdram_size - read back SDRAM size from sdram_config register
+ *
+ * @return: The SDRAM size
+ */
+unsigned long emif4_sdram_size(const void __iomem *emif4)
+{
+	uint32_t sdram_config = readl(emif4 + EMIF4_SDRAM_CONFIG);
+	int rows, cols, width, banks;
+	unsigned long size;
+
+	rows = ((sdram_config >> 7) & 0x7) + 9;
+	cols = (sdram_config & 0x7) + 8;
+
+	switch ((sdram_config >> 14) & 0x3) {
+	case 0:
+		width = 4;
+		break;
+	case 1:
+		width = 2;
+		break;
+	default:
+		return 0;
+	}
+
+	switch ((sdram_config >> 4) & 0x7) {
+	case 0:
+		banks = 1;
+		break;
+	case 1:
+		banks = 2;
+		break;
+	case 2:
+		banks = 4;
+		break;
+	case 3:
+		banks = 8;
+		break;
+	default:
+		return 0;
+	}
+
+	size = (1 << rows) * (1 << cols) * banks * width;
+
+	debug("SDRAM_CONFIG: 0x%08x, cols: %2d, rows: %2d, width: %2d, banks: %2d, size: 0x%08lx\n",
+	      sdram_config, cols, rows, width, banks, size);
+
+	return size;
+}
+
 /*
  *  - Init the emif4 module for DDR access
  *  - Early init routines, called from flash or SRAM.
diff --git a/arch/arm/mach-omap/include/mach/am33xx-silicon.h b/arch/arm/mach-omap/include/mach/am33xx-silicon.h
index 671706ff49..74b0b7638e 100644
--- a/arch/arm/mach-omap/include/mach/am33xx-silicon.h
+++ b/arch/arm/mach-omap/include/mach/am33xx-silicon.h
@@ -220,7 +220,6 @@ void am33xx_config_ddr_data(const struct am33xx_ddr_data *data, int macronr);
 void am335x_sdram_init(int ioctrl, const struct am33xx_cmd_control *cmd_ctrl,
 			const struct am33xx_emif_regs *emif_regs,
 			const struct am33xx_ddr_data *ddr_data);
-unsigned long am335x_sdram_size(void);
 void am335x_barebox_entry(void *boarddata);
 
 #endif
diff --git a/arch/arm/mach-omap/include/mach/emif4.h b/arch/arm/mach-omap/include/mach/emif4.h
index 10ecfe6c6b..00702e60e8 100644
--- a/arch/arm/mach-omap/include/mach/emif4.h
+++ b/arch/arm/mach-omap/include/mach/emif4.h
@@ -45,6 +45,8 @@
 #define EMIF4_DDR_PHY_CTRL_2					0xec
 #define EMIF4_IODFT_TLGC					0x60
 
+unsigned long emif4_sdram_size(const void __iomem *emif4);
+
 void am35xx_emif4_init(const void __iomem *emif4);
 
 #endif /* endif _EMIF_H_ */
-- 
2.32.0


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Re: [RFC 1/8] ARM: OMAP: Rearranging EMIF4 definitions

[Sascha Hauer]

On Fri, Jun 03, 2022 at 02:25:33PM +0300, Alexander Shiyan wrote:
> Currently we have three different definitions for EMIF management:
> - Offsets
> - Offsets relative to the base address
> - Offsets in the structure
> 
> The patch represents the first attempt to unify this.
> 
> Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
> ---
>  arch/arm/boards/afi-gf/lowlevel.c             | 39 +++++++++---------
>  arch/arm/mach-omap/am33xx_generic.c           | 41 +++++++++----------
>  .../mach-omap/include/mach/am33xx-silicon.h   | 10 +----
>  3 files changed, 42 insertions(+), 48 deletions(-)

Looks all good and is a nice cleanup, so applied despite its RFC status.

One thing I found in the context of this patch:

>  static void board_config_emif_ddr(void)
>  {
> +	const void __iomem *emif4 = IOMEM(AM33XX_EMIF4_BASE);
>  	u32 i;

[...]

>  
>  	for (i = 0; i < 5000; i++) {
>  
>  	}

I wonder if this works. I made the experience that the compiler
optimizes such loops away when the counter isn't declared as volatile.

Sascha

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Re: [RFC 1/8] ARM: OMAP: Rearranging EMIF4 definitions

[Alexander Shiyan]

вт, 7 июн. 2022 г. в 10:38, Sascha Hauer <sha@pengutronix.de>
> On Fri, Jun 03, 2022 at 02:25:33PM +0300, Alexander Shiyan wrote:
> > Currently we have three different definitions for EMIF management:
> > - Offsets
> > - Offsets relative to the base address
> > - Offsets in the structure
> >
> > The patch represents the first attempt to unify this.
> >
> > Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
> > ---
> >  arch/arm/boards/afi-gf/lowlevel.c             | 39 +++++++++---------
> >  arch/arm/mach-omap/am33xx_generic.c           | 41 +++++++++----------
> >  .../mach-omap/include/mach/am33xx-silicon.h   | 10 +----
> >  3 files changed, 42 insertions(+), 48 deletions(-)
>
> Looks all good and is a nice cleanup, so applied despite its RFC status.
>
> One thing I found in the context of this patch:
>
> >  static void board_config_emif_ddr(void)
> >  {
> > +     const void __iomem *emif4 = IOMEM(AM33XX_EMIF4_BASE);
> >       u32 i;
>
> [...]
>
> >
> >       for (i = 0; i < 5000; i++) {
> >
> >       }
>
> I wonder if this works. I made the experience that the compiler
> optimizes such loops away when the counter isn't declared as volatile.

Hello.

I did not touch the logic of the procedures, this is a topic for other patches,
although yes, I think this empty loop can be removed.

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