ARM: 6185/1: AT91: PM: dual ram controller support

This rework allows to address tow memory controllers. AT91SAM9263 and
AT91SAM9G45 family have tow SDRAM or DDR/SDRAM controllers. Power management
should take care of this.
This patch modify the way RAM IP header files are implemented to allow
access to registers of both controllers ; it also adds some macros.

We also modify the power management files to use those modified header files.
Slow clock (assembly) and regular power management functions are synchronized
for setting of RAM self-refresh procedure:
(lpr & ~AT91_DDRSDRC_LPCB) | AT91_DDRSDRC_LPCB_SELF_REFRESH

Note that AT91RM9200 is not impacted by this modification.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

9 files changed, 258 insertions, 48 deletions

diff --git a/arch/arm/mach-at91/include/mach/at91cap9.h b/arch/arm/mach-at91/include/mach/at91cap9.h
index d8c1ededaa75..9c6af9737485 100644
--- a/arch/arm/mach-at91/include/mach/at91cap9.h
+++ b/arch/arm/mach-at91/include/mach/at91cap9.h
@@ -84,7 +84,7 @@
  */
 #define AT91_ECC        (0xffffe200 - AT91_BASE_SYS)
 #define AT91_BCRAMC     (0xffffe400 - AT91_BASE_SYS)
-#define AT91_DDRSDRC    (0xffffe600 - AT91_BASE_SYS)
+#define AT91_DDRSDRC0   (0xffffe600 - AT91_BASE_SYS)
 #define AT91_SMC        (0xffffe800 - AT91_BASE_SYS)
 #define AT91_MATRIX     (0xffffea00 - AT91_BASE_SYS)
 #define AT91_CCFG       (0xffffeb10 - AT91_BASE_SYS)
diff --git a/arch/arm/mach-at91/include/mach/at91cap9_ddrsdr.h b/arch/arm/mach-at91/include/mach/at91cap9_ddrsdr.h
index 1499b1cbffdd..976f4a6c3353 100644
--- a/arch/arm/mach-at91/include/mach/at91cap9_ddrsdr.h
+++ b/arch/arm/mach-at91/include/mach/at91cap9_ddrsdr.h
@@ -15,7 +15,7 @@
 #ifndef AT91CAP9_DDRSDR_H
 #define AT91CAP9_DDRSDR_H
 
-#define AT91_DDRSDRC_MR         (AT91_DDRSDRC + 0x00)   /* Mode Register */
+#define AT91_DDRSDRC_MR         0x00    /* Mode Register */
 #define         AT91_DDRSDRC_MODE       (0xf << 0)              /* Command Mode */
 #define                 AT91_DDRSDRC_MODE_NORMAL                0
 #define                 AT91_DDRSDRC_MODE_NOP           1
@@ -25,10 +25,10 @@
 #define                 AT91_DDRSDRC_MODE_EXT_LMR       5
 #define                 AT91_DDRSDRC_MODE_DEEP          6
 
-#define AT91_DDRSDRC_RTR        (AT91_DDRSDRC + 0x04)   /* Refresh Timer Register */
+#define AT91_DDRSDRC_RTR        0x04    /* Refresh Timer Register */
 #define         AT91_DDRSDRC_COUNT      (0xfff << 0)            /* Refresh Timer Counter */
 
-#define AT91_DDRSDRC_CR         (AT91_DDRSDRC + 0x08)   /* Configuration Register */
+#define AT91_DDRSDRC_CR         0x08    /* Configuration Register */
 #define         AT91_DDRSDRC_NC         (3 << 0)                /* Number of Column Bits */
 #define                 AT91_DDRSDRC_NC_SDR8    (0 << 0)
 #define                 AT91_DDRSDRC_NC_SDR9    (1 << 0)
@@ -49,7 +49,7 @@
 #define         AT91_DDRSDRC_DLL        (1 << 7)                /* Reset DLL */
 #define         AT91_DDRSDRC_DICDS      (1 << 8)                /* Output impedance control */
 
-#define AT91_DDRSDRC_T0PR       (AT91_DDRSDRC + 0x0C)   /* Timing 0 Register */
+#define AT91_DDRSDRC_T0PR       0x0C    /* Timing 0 Register */
 #define         AT91_DDRSDRC_TRAS       (0xf <<  0)             /* Active to Precharge delay */
 #define         AT91_DDRSDRC_TRCD       (0xf <<  4)             /* Row to Column delay */
 #define         AT91_DDRSDRC_TWR        (0xf <<  8)             /* Write recovery delay */
@@ -59,13 +59,13 @@
 #define         AT91_DDRSDRC_TWTR       (1   << 24)             /* Internal Write to Read delay */
 #define         AT91_DDRSDRC_TMRD       (0xf << 28)             /* Load mode to active/refresh delay */
 
-#define AT91_DDRSDRC_T1PR       (AT91_DDRSDRC + 0x10)   /* Timing 1 Register */
+#define AT91_DDRSDRC_T1PR       0x10    /* Timing 1 Register */
 #define         AT91_DDRSDRC_TRFC       (0x1f << 0)             /* Row Cycle Delay */
 #define         AT91_DDRSDRC_TXSNR      (0xff << 8)             /* Exit self-refresh to non-read */
 #define         AT91_DDRSDRC_TXSRD      (0xff << 16)            /* Exit self-refresh to read */
 #define         AT91_DDRSDRC_TXP        (0xf  << 24)            /* Exit power-down delay */
 
-#define AT91_DDRSDRC_LPR        (AT91_DDRSDRC + 0x18)   /* Low Power Register */
+#define AT91_DDRSDRC_LPR        0x18    /* Low Power Register */
 #define         AT91_DDRSDRC_LPCB               (3 << 0)        /* Low-power Configurations */
 #define                 AT91_DDRSDRC_LPCB_DISABLE               0
 #define                 AT91_DDRSDRC_LPCB_SELF_REFRESH          1
@@ -80,14 +80,14 @@
 #define                 AT91_DDRSDRC_TIMEOUT_64_CLK_CYCLES      (1 << 12)
 #define                 AT91_DDRSDRC_TIMEOUT_128_CLK_CYCLES     (2 << 12)
 
-#define AT91_DDRSDRC_MDR        (AT91_DDRSDRC + 0x1C)   /* Memory Device Register */
+#define AT91_DDRSDRC_MDR        0x1C    /* Memory Device Register */
 #define         AT91_DDRSDRC_MD         (3 << 0)                /* Memory Device Type */
 #define                 AT91_DDRSDRC_MD_SDR             0
 #define                 AT91_DDRSDRC_MD_LOW_POWER_SDR   1
 #define                 AT91_DDRSDRC_MD_DDR             2
 #define                 AT91_DDRSDRC_MD_LOW_POWER_DDR   3
 
-#define AT91_DDRSDRC_DLLR       (AT91_DDRSDRC + 0x20)   /* DLL Information Register */
+#define AT91_DDRSDRC_DLLR       0x20    /* DLL Information Register */
 #define         AT91_DDRSDRC_MDINC      (1 << 0)                /* Master Delay increment */
 #define         AT91_DDRSDRC_MDDEC      (1 << 1)                /* Master Delay decrement */
 #define         AT91_DDRSDRC_MDOVF      (1 << 2)                /* Master Delay Overflow */
@@ -98,5 +98,11 @@
 #define         AT91_DDRSDRC_SDVAL      (0xff << 16)            /* Slave Delay value */
 #define         AT91_DDRSDRC_SDCVAL     (0xff << 24)            /* Slave Delay Correction value */
 
+/* Register access macros */
+#define at91_ramc_read(num, reg) \
+        at91_sys_read(AT91_DDRSDRC##num + reg)
+#define at91_ramc_write(num, reg, value) \
+        at91_sys_write(AT91_DDRSDRC##num + reg, value)
+
 
 #endif
diff --git a/arch/arm/mach-at91/include/mach/at91sam9260.h b/arch/arm/mach-at91/include/mach/at91sam9260.h
index 43c396b9b4cb..4e79036d3b80 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9260.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9260.h
@@ -84,7 +84,7 @@
  * System Peripherals (offset from AT91_BASE_SYS)
  */
 #define AT91_ECC        (0xffffe800 - AT91_BASE_SYS)
-#define AT91_SDRAMC     (0xffffea00 - AT91_BASE_SYS)
+#define AT91_SDRAMC0    (0xffffea00 - AT91_BASE_SYS)
 #define AT91_SMC        (0xffffec00 - AT91_BASE_SYS)
 #define AT91_MATRIX     (0xffffee00 - AT91_BASE_SYS)
 #define AT91_CCFG       (0xffffef10 - AT91_BASE_SYS)
diff --git a/arch/arm/mach-at91/include/mach/at91sam9261.h b/arch/arm/mach-at91/include/mach/at91sam9261.h
index 87de8be17484..2b5618518129 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9261.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9261.h
@@ -68,7 +68,7 @@
 /*
  * System Peripherals (offset from AT91_BASE_SYS)
  */
-#define AT91_SDRAMC     (0xffffea00 - AT91_BASE_SYS)
+#define AT91_SDRAMC0    (0xffffea00 - AT91_BASE_SYS)
 #define AT91_SMC        (0xffffec00 - AT91_BASE_SYS)
 #define AT91_MATRIX     (0xffffee00 - AT91_BASE_SYS)
 #define AT91_AIC        (0xfffff000 - AT91_BASE_SYS)
diff --git a/arch/arm/mach-at91/include/mach/at91sam9_ddrsdr.h b/arch/arm/mach-at91/include/mach/at91sam9_ddrsdr.h
new file mode 100644
index 000000000000..d27b15ba8ebf
--- /dev/null
+++ b/arch/arm/mach-at91/include/mach/at91sam9_ddrsdr.h
@@ -0,0 +1,130 @@
+/*
+ * Header file for the Atmel DDR/SDR SDRAM Controller
+ *
+ * Copyright (C) 2010 Atmel Corporation
+ *      Nicolas Ferre <nicolas.ferre@atmel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#ifndef AT91SAM9_DDRSDR_H
+#define AT91SAM9_DDRSDR_H
+
+#define AT91_DDRSDRC_MR         0x00    /* Mode Register */
+#define         AT91_DDRSDRC_MODE       (0x7 << 0)              /* Command Mode */
+#define                 AT91_DDRSDRC_MODE_NORMAL        0
+#define                 AT91_DDRSDRC_MODE_NOP           1
+#define                 AT91_DDRSDRC_MODE_PRECHARGE     2
+#define                 AT91_DDRSDRC_MODE_LMR           3
+#define                 AT91_DDRSDRC_MODE_REFRESH       4
+#define                 AT91_DDRSDRC_MODE_EXT_LMR       5
+#define                 AT91_DDRSDRC_MODE_DEEP          6
+
+#define AT91_DDRSDRC_RTR        0x04    /* Refresh Timer Register */
+#define         AT91_DDRSDRC_COUNT      (0xfff << 0)            /* Refresh Timer Counter */
+
+#define AT91_DDRSDRC_CR         0x08    /* Configuration Register */
+#define         AT91_DDRSDRC_NC         (3 << 0)                /* Number of Column Bits */
+#define                 AT91_DDRSDRC_NC_SDR8    (0 << 0)
+#define                 AT91_DDRSDRC_NC_SDR9    (1 << 0)
+#define                 AT91_DDRSDRC_NC_SDR10   (2 << 0)
+#define                 AT91_DDRSDRC_NC_SDR11   (3 << 0)
+#define                 AT91_DDRSDRC_NC_DDR9    (0 << 0)
+#define                 AT91_DDRSDRC_NC_DDR10   (1 << 0)
+#define                 AT91_DDRSDRC_NC_DDR11   (2 << 0)
+#define                 AT91_DDRSDRC_NC_DDR12   (3 << 0)
+#define         AT91_DDRSDRC_NR         (3 << 2)                /* Number of Row Bits */
+#define                 AT91_DDRSDRC_NR_11      (0 << 2)
+#define                 AT91_DDRSDRC_NR_12      (1 << 2)
+#define                 AT91_DDRSDRC_NR_13      (2 << 2)
+#define                 AT91_DDRSDRC_NR_14      (3 << 2)
+#define         AT91_DDRSDRC_CAS        (7 << 4)                /* CAS Latency */
+#define                 AT91_DDRSDRC_CAS_2      (2 << 4)
+#define                 AT91_DDRSDRC_CAS_3      (3 << 4)
+#define                 AT91_DDRSDRC_CAS_25     (6 << 4)
+#define         AT91_DDRSDRC_RST_DLL    (1 << 7)                /* Reset DLL */
+#define         AT91_DDRSDRC_DICDS      (1 << 8)                /* Output impedance control */
+#define         AT91_DDRSDRC_DIS_DLL    (1 << 9)                /* Disable DLL */
+#define         AT91_DDRSDRC_OCD        (1 << 12)               /* Off-Chip Driver */
+#define         AT91_DDRSDRC_DQMS       (1 << 16)               /* Mask Data is Shared */
+#define         AT91_DDRSDRC_ACTBST     (1 << 18)               /* Active Bank X to Burst Stop Read Access Bank Y */
+
+#define AT91_DDRSDRC_T0PR       0x0C    /* Timing 0 Register */
+#define         AT91_DDRSDRC_TRAS       (0xf <<  0)             /* Active to Precharge delay */
+#define         AT91_DDRSDRC_TRCD       (0xf <<  4)             /* Row to Column delay */
+#define         AT91_DDRSDRC_TWR        (0xf <<  8)             /* Write recovery delay */
+#define         AT91_DDRSDRC_TRC        (0xf << 12)             /* Row cycle delay */
+#define         AT91_DDRSDRC_TRP        (0xf << 16)             /* Row precharge delay */
+#define         AT91_DDRSDRC_TRRD       (0xf << 20)             /* Active BankA to BankB */
+#define         AT91_DDRSDRC_TWTR       (0x7 << 24)             /* Internal Write to Read delay */
+#define         AT91_DDRSDRC_RED_WRRD   (0x1 << 27)             /* Reduce Write to Read Delay */
+#define         AT91_DDRSDRC_TMRD       (0xf << 28)             /* Load mode to active/refresh delay */
+
+#define AT91_DDRSDRC_T1PR       0x10    /* Timing 1 Register */
+#define         AT91_DDRSDRC_TRFC       (0x1f << 0)             /* Row Cycle Delay */
+#define         AT91_DDRSDRC_TXSNR      (0xff << 8)             /* Exit self-refresh to non-read */
+#define         AT91_DDRSDRC_TXSRD      (0xff << 16)            /* Exit self-refresh to read */
+#define         AT91_DDRSDRC_TXP        (0xf  << 24)            /* Exit power-down delay */
+
+#define AT91_DDRSDRC_T2PR       0x14    /* Timing 2 Register */
+#define         AT91_DDRSDRC_TXARD      (0xf  << 0)             /* Exit active power down delay to read command in mode "Fast Exit" */
+#define         AT91_DDRSDRC_TXARDS     (0xf  << 4)             /* Exit active power down delay to read command in mode "Slow Exit" */
+#define         AT91_DDRSDRC_TRPA       (0xf  << 8)             /* Row Precharge All delay */
+#define         AT91_DDRSDRC_TRTP       (0x7  << 12)            /* Read to Precharge delay */
+
+#define AT91_DDRSDRC_LPR        0x1C    /* Low Power Register */
+#define         AT91_DDRSDRC_LPCB       (3 << 0)                /* Low-power Configurations */
+#define                 AT91_DDRSDRC_LPCB_DISABLE               0
+#define                 AT91_DDRSDRC_LPCB_SELF_REFRESH          1
+#define                 AT91_DDRSDRC_LPCB_POWER_DOWN            2
+#define                 AT91_DDRSDRC_LPCB_DEEP_POWER_DOWN       3
+#define         AT91_DDRSDRC_CLKFR      (1 << 2)        /* Clock Frozen */
+#define         AT91_DDRSDRC_PASR       (7 << 4)        /* Partial Array Self Refresh */
+#define         AT91_DDRSDRC_TCSR       (3 << 8)        /* Temperature Compensated Self Refresh */
+#define         AT91_DDRSDRC_DS         (3 << 10)       /* Drive Strength */
+#define         AT91_DDRSDRC_TIMEOUT    (3 << 12)       /* Time to define when Low Power Mode is enabled */
+#define                 AT91_DDRSDRC_TIMEOUT_0_CLK_CYCLES       (0 << 12)
+#define                 AT91_DDRSDRC_TIMEOUT_64_CLK_CYCLES      (1 << 12)
+#define                 AT91_DDRSDRC_TIMEOUT_128_CLK_CYCLES     (2 << 12)
+#define         AT91_DDRSDRC_APDE       (1 << 16)        /* Active power down exit time */
+#define         AT91_DDRSDRC_UPD_MR     (3 << 20)        /* Update load mode register and extended mode register */
+
+#define AT91_DDRSDRC_MDR        0x20    /* Memory Device Register */
+#define         AT91_DDRSDRC_MD         (3 << 0)                /* Memory Device Type */
+#define                 AT91_DDRSDRC_MD_SDR             0
+#define                 AT91_DDRSDRC_MD_LOW_POWER_SDR   1
+#define                 AT91_DDRSDRC_MD_LOW_POWER_DDR   3
+#define                 AT91_DDRSDRC_MD_DDR2            6
+#define         AT91_DDRSDRC_DBW        (1 << 4)                /* Data Bus Width */
+#define                 AT91_DDRSDRC_DBW_32BITS         (0 <<  4)
+#define                 AT91_DDRSDRC_DBW_16BITS         (1 <<  4)
+
+#define AT91_DDRSDRC_DLL        0x24    /* DLL Information Register */
+#define         AT91_DDRSDRC_MDINC      (1 << 0)                /* Master Delay increment */
+#define         AT91_DDRSDRC_MDDEC      (1 << 1)                /* Master Delay decrement */
+#define         AT91_DDRSDRC_MDOVF      (1 << 2)                /* Master Delay Overflow */
+#define         AT91_DDRSDRC_MDVAL      (0xff <<  8)            /* Master Delay value */
+
+#define AT91_DDRSDRC_HS         0x2C    /* High Speed Register */
+#define         AT91_DDRSDRC_DIS_ATCP_RD        (1 << 2)        /* Anticip read access is disabled */
+
+#define AT91_DDRSDRC_DELAY(n)   (0x30 + (0x4 * (n)))    /* Delay I/O Register n */
+
+#define AT91_DDRSDRC_WPMR       0xE4    /* Write Protect Mode Register */
+#define         AT91_DDRSDRC_WP         (1 << 0)                /* Write protect enable */
+#define         AT91_DDRSDRC_WPKEY      (0xffffff << 8)         /* Write protect key */
+#define         AT91_DDRSDRC_KEY        (0x444452 << 8)         /* Write protect key = "DDR" */
+
+#define AT91_DDRSDRC_WPSR       0xE8    /* Write Protect Status Register */
+#define         AT91_DDRSDRC_WPVS       (1 << 0)                /* Write protect violation status */
+#define         AT91_DDRSDRC_WPVSRC     (0xffff << 8)           /* Write protect violation source */
+
+/* Register access macros */
+#define at91_ramc_read(num, reg) \
+        at91_sys_read(AT91_DDRSDRC##num + reg)
+#define at91_ramc_write(num, reg, value) \
+        at91_sys_write(AT91_DDRSDRC##num + reg, value)
+
+#endif
diff --git a/arch/arm/mach-at91/include/mach/at91sam9_sdramc.h b/arch/arm/mach-at91/include/mach/at91sam9_sdramc.h
index b7260389f7ca..100f5a592926 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9_sdramc.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9_sdramc.h
@@ -17,7 +17,7 @@
 #define AT91SAM9_SDRAMC_H
 
 /* SDRAM Controller (SDRAMC) registers */
-#define AT91_SDRAMC_MR          (AT91_SDRAMC + 0x00)    /* SDRAM Controller Mode Register */
+#define AT91_SDRAMC_MR          0x00    /* SDRAM Controller Mode Register */
 #define         AT91_SDRAMC_MODE        (0xf << 0)              /* Command Mode */
 #define                 AT91_SDRAMC_MODE_NORMAL         0
 #define                 AT91_SDRAMC_MODE_NOP            1
@@ -27,10 +27,10 @@
 #define                 AT91_SDRAMC_MODE_EXT_LMR        5
 #define                 AT91_SDRAMC_MODE_DEEP           6
 
-#define AT91_SDRAMC_TR          (AT91_SDRAMC + 0x04)    /* SDRAM Controller Refresh Timer Register */
+#define AT91_SDRAMC_TR          0x04    /* SDRAM Controller Refresh Timer Register */
 #define         AT91_SDRAMC_COUNT       (0xfff << 0)            /* Refresh Timer Counter */
 
-#define AT91_SDRAMC_CR          (AT91_SDRAMC + 0x08)    /* SDRAM Controller Configuration Register */
+#define AT91_SDRAMC_CR          0x08    /* SDRAM Controller Configuration Register */
 #define         AT91_SDRAMC_NC          (3 << 0)                /* Number of Column Bits */
 #define                 AT91_SDRAMC_NC_8        (0 << 0)
 #define                 AT91_SDRAMC_NC_9        (1 << 0)
@@ -57,7 +57,7 @@
 #define         AT91_SDRAMC_TRAS        (0xf << 24)             /* Active to Precharge Delay */
 #define         AT91_SDRAMC_TXSR        (0xf << 28)             /* Exit Self Refresh to Active Delay */
 
-#define AT91_SDRAMC_LPR         (AT91_SDRAMC + 0x10)    /* SDRAM Controller Low Power Register */
+#define AT91_SDRAMC_LPR         0x10    /* SDRAM Controller Low Power Register */
 #define         AT91_SDRAMC_LPCB                (3 << 0)        /* Low-power Configurations */
 #define                 AT91_SDRAMC_LPCB_DISABLE                0
 #define                 AT91_SDRAMC_LPCB_SELF_REFRESH           1
@@ -71,16 +71,21 @@
 #define                 AT91_SDRAMC_TIMEOUT_64_CLK_CYCLES       (1 << 12)
 #define                 AT91_SDRAMC_TIMEOUT_128_CLK_CYCLES      (2 << 12)
 
-#define AT91_SDRAMC_IER         (AT91_SDRAMC + 0x14)    /* SDRAM Controller Interrupt Enable Register */
-#define AT91_SDRAMC_IDR         (AT91_SDRAMC + 0x18)    /* SDRAM Controller Interrupt Disable Register */
-#define AT91_SDRAMC_IMR         (AT91_SDRAMC + 0x1C)    /* SDRAM Controller Interrupt Mask Register */
-#define AT91_SDRAMC_ISR         (AT91_SDRAMC + 0x20)    /* SDRAM Controller Interrupt Status Register */
+#define AT91_SDRAMC_IER         0x14    /* SDRAM Controller Interrupt Enable Register */
+#define AT91_SDRAMC_IDR         0x18    /* SDRAM Controller Interrupt Disable Register */
+#define AT91_SDRAMC_IMR         0x1C    /* SDRAM Controller Interrupt Mask Register */
+#define AT91_SDRAMC_ISR         0x20    /* SDRAM Controller Interrupt Status Register */
 #define         AT91_SDRAMC_RES         (1 << 0)                /* Refresh Error Status */
 
-#define AT91_SDRAMC_MDR         (AT91_SDRAMC + 0x24)    /* SDRAM Memory Device Register */
+#define AT91_SDRAMC_MDR         0x24    /* SDRAM Memory Device Register */
 #define         AT91_SDRAMC_MD          (3 << 0)                /* Memory Device Type */
 #define                 AT91_SDRAMC_MD_SDRAM            0
 #define                 AT91_SDRAMC_MD_LOW_POWER_SDRAM  1
 
+/* Register access macros */
+#define at91_ramc_read(num, reg) \
+        at91_sys_read(AT91_SDRAMC##num + reg)
+#define at91_ramc_write(num, reg, value) \
+        at91_sys_write(AT91_SDRAMC##num + reg, value)
 
 #endif
diff --git a/arch/arm/mach-at91/include/mach/at91sam9rl.h b/arch/arm/mach-at91/include/mach/at91sam9rl.h
index fc2de6c09c86..87ba8517ad98 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9rl.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9rl.h
@@ -74,7 +74,7 @@
  */
 #define AT91_DMA        (0xffffe600 - AT91_BASE_SYS)
 #define AT91_ECC        (0xffffe800 - AT91_BASE_SYS)
-#define AT91_SDRAMC     (0xffffea00 - AT91_BASE_SYS)
+#define AT91_SDRAMC0    (0xffffea00 - AT91_BASE_SYS)
 #define AT91_SMC        (0xffffec00 - AT91_BASE_SYS)
 #define AT91_MATRIX     (0xffffee00 - AT91_BASE_SYS)
 #define AT91_CCFG       (0xffffef10 - AT91_BASE_SYS)
diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h
index 08322c44df1a..8c87d0c1b8f8 100644
--- a/arch/arm/mach-at91/pm.h
+++ b/arch/arm/mach-at91/pm.h
@@ -30,14 +30,50 @@ static inline u32 sdram_selfrefresh_enable(void)
 {
         u32 saved_lpr, lpr;
 
-        saved_lpr = at91_sys_read(AT91_DDRSDRC_LPR);
+        saved_lpr = at91_ramc_read(0, AT91_DDRSDRC_LPR);
 
         lpr = saved_lpr & ~AT91_DDRSDRC_LPCB;
-        at91_sys_write(AT91_DDRSDRC_LPR, lpr | AT91_DDRSDRC_LPCB_SELF_REFRESH);
+        at91_ramc_write(0, AT91_DDRSDRC_LPR, lpr | AT91_DDRSDRC_LPCB_SELF_REFRESH);
         return saved_lpr;
 }
 
-#define sdram_selfrefresh_disable(saved_lpr)    at91_sys_write(AT91_DDRSDRC_LPR, saved_lpr)
+#define sdram_selfrefresh_disable(saved_lpr)    at91_ramc_write(0, AT91_DDRSDRC_LPR, saved_lpr)
+
+#elif defined(CONFIG_ARCH_AT91SAM9G45)
+#include <mach/at91sam9_ddrsdr.h>
+
+/* We manage both DDRAM/SDRAM controllers, we need more than one value to
+ * remember.
+ */
+static u32 saved_lpr1;
+
+static inline u32 sdram_selfrefresh_enable(void)
+{
+        /* Those tow values allow us to delay self-refresh activation
+         * to the maximum. */
+        u32 lpr0, lpr1;
+        u32 saved_lpr0;
+
+        saved_lpr1 = at91_ramc_read(1, AT91_DDRSDRC_LPR);
+        lpr1 = saved_lpr1 & ~AT91_DDRSDRC_LPCB;
+        lpr1 |= AT91_DDRSDRC_LPCB_SELF_REFRESH;
+
+        saved_lpr0 = at91_ramc_read(0, AT91_DDRSDRC_LPR);
+        lpr0 = saved_lpr0 & ~AT91_DDRSDRC_LPCB;
+        lpr0 |= AT91_DDRSDRC_LPCB_SELF_REFRESH;
+
+        /* self-refresh mode now */
+        at91_ramc_write(0, AT91_DDRSDRC_LPR, lpr0);
+        at91_ramc_write(1, AT91_DDRSDRC_LPR, lpr1);
+
+        return saved_lpr0;
+}
+
+#define sdram_selfrefresh_disable(saved_lpr0)   \
+        do { \
+                at91_ramc_write(0, AT91_DDRSDRC_LPR, saved_lpr0); \
+                at91_ramc_write(1, AT91_DDRSDRC_LPR, saved_lpr1); \
+        } while (0)
 
 #else
 #include <mach/at91sam9_sdramc.h>
@@ -47,7 +83,6 @@ static inline u32 sdram_selfrefresh_enable(void)
  * FIXME either or both the SDRAM controllers (EB0, EB1) might be in use;
  * handle those cases both here and in the Suspend-To-RAM support.
  */
-#define AT91_SDRAMC     AT91_SDRAMC0
 #warning Assuming EB1 SDRAM controller is *NOT* used
 #endif
 
@@ -55,13 +90,13 @@ static inline u32 sdram_selfrefresh_enable(void)
 {
         u32 saved_lpr, lpr;
 
-        saved_lpr = at91_sys_read(AT91_SDRAMC_LPR);
+        saved_lpr = at91_ramc_read(0, AT91_SDRAMC_LPR);
 
         lpr = saved_lpr & ~AT91_SDRAMC_LPCB;
-        at91_sys_write(AT91_SDRAMC_LPR, lpr | AT91_SDRAMC_LPCB_SELF_REFRESH);
+        at91_ramc_write(0, AT91_SDRAMC_LPR, lpr | AT91_SDRAMC_LPCB_SELF_REFRESH);
         return saved_lpr;
 }
 
-#define sdram_selfrefresh_disable(saved_lpr)    at91_sys_write(AT91_SDRAMC_LPR, saved_lpr)
+#define sdram_selfrefresh_disable(saved_lpr)    at91_ramc_write(0, AT91_SDRAMC_LPR, saved_lpr)
 
 #endif
diff --git a/arch/arm/mach-at91/pm_slowclock.S b/arch/arm/mach-at91/pm_slowclock.S
index 9c5b48e68a71..b6b00a1f6125 100644
--- a/arch/arm/mach-at91/pm_slowclock.S
+++ b/arch/arm/mach-at91/pm_slowclock.S
@@ -16,10 +16,12 @@
 #include <mach/hardware.h>
 #include <mach/at91_pmc.h>
 
-#ifdef CONFIG_ARCH_AT91RM9200
+#if defined(CONFIG_ARCH_AT91RM9200)
 #include <mach/at91rm9200_mc.h>
 #elif defined(CONFIG_ARCH_AT91CAP9)
 #include <mach/at91cap9_ddrsdr.h>
+#elif defined(CONFIG_ARCH_AT91SAM9G45)
+#include <mach/at91sam9_ddrsdr.h>
 #else
 #include <mach/at91sam9_sdramc.h>
 #endif
@@ -30,7 +32,6 @@
  * FIXME either or both the SDRAM controllers (EB0, EB1) might be in use;
  * handle those cases both here and in the Suspend-To-RAM support.
  */
-#define AT91_SDRAMC     AT91_SDRAMC0
 #warning Assuming EB1 SDRAM controller is *NOT* used
 #endif
 
@@ -113,12 +114,14 @@ ENTRY(at91_slow_clock)
         /*
          * Register usage:
          *  R1 = Base address of AT91_PMC
-         *  R2 = Base address of AT91_SDRAMC (or AT91_SYS on AT91RM9200)
+         *  R2 = Base address of RAM Controller (SDRAM, DDRSDR, or AT91_SYS)
          *  R3 = temporary register
          *  R4 = temporary register
+         *  R5 = Base address of second RAM Controller or 0 if not present
          */
         ldr     r1, .at91_va_base_pmc
         ldr     r2, .at91_va_base_sdramc
+        ldr     r5, .at91_va_base_ramc1
 
         /* Drain write buffer */
         mcr     p15, 0, r0, c7, c10, 4
@@ -127,20 +130,33 @@ ENTRY(at91_slow_clock)
         /* Put SDRAM in self-refresh mode */
         mov     r3, #1
         str     r3, [r2, #AT91_SDRAMC_SRR]
-#elif defined(CONFIG_ARCH_AT91CAP9)
-        /* Enable SDRAM self-refresh mode */
-        ldr     r3, [r2, #AT91_DDRSDRC_LPR - AT91_DDRSDRC]
-        str     r3, .saved_sam9_lpr
+#elif defined(CONFIG_ARCH_AT91CAP9) \
+        || defined(CONFIG_ARCH_AT91SAM9G45)
 
-        mov     r3, #AT91_DDRSDRC_LPCB_SELF_REFRESH
-        str     r3, [r2, #AT91_DDRSDRC_LPR - AT91_DDRSDRC]
+        /* prepare for DDRAM self-refresh mode */
+        ldr     r3, [r2, #AT91_DDRSDRC_LPR]
+        str     r3, .saved_sam9_lpr
+        bic     r3, #AT91_DDRSDRC_LPCB
+        orr     r3, #AT91_DDRSDRC_LPCB_SELF_REFRESH
+
+        /* figure out if we use the second ram controller */
+        cmp     r5, #0
+        ldrne   r4, [r5, #AT91_DDRSDRC_LPR]
+        strne   r4, .saved_sam9_lpr1
+        bicne   r4, #AT91_DDRSDRC_LPCB
+        orrne   r4, #AT91_DDRSDRC_LPCB_SELF_REFRESH
+
+        /* Enable DDRAM self-refresh mode */
+        str     r3, [r2, #AT91_DDRSDRC_LPR]
+        strne   r4, [r5, #AT91_DDRSDRC_LPR]
 #else
         /* Enable SDRAM self-refresh mode */
-        ldr     r3, [r2, #AT91_SDRAMC_LPR - AT91_SDRAMC]
+        ldr     r3, [r2, #AT91_SDRAMC_LPR]
         str     r3, .saved_sam9_lpr
 
-        mov     r3, #AT91_SDRAMC_LPCB_SELF_REFRESH
-        str     r3, [r2, #AT91_SDRAMC_LPR - AT91_SDRAMC]
+        bic     r3, #AT91_SDRAMC_LPCB
+        orr     r3, #AT91_SDRAMC_LPCB_SELF_REFRESH
+        str     r3, [r2, #AT91_SDRAMC_LPR]
 #endif
 
         /* Save Master clock setting */
@@ -247,14 +263,21 @@ ENTRY(at91_slow_clock)
 
 #ifdef CONFIG_ARCH_AT91RM9200
         /* Do nothing - self-refresh is automatically disabled. */
-#elif defined(CONFIG_ARCH_AT91CAP9)
-        /* Restore LPR on AT91CAP9 */
+#elif defined(CONFIG_ARCH_AT91CAP9) \
+        || defined(CONFIG_ARCH_AT91SAM9G45)
+        /* Restore LPR on AT91 with DDRAM */
         ldr     r3, .saved_sam9_lpr
-        str     r3, [r2, #AT91_DDRSDRC_LPR - AT91_DDRSDRC]
+        str     r3, [r2, #AT91_DDRSDRC_LPR]
+
+        /* if we use the second ram controller */
+        cmp     r5, #0
+        ldrne   r4, .saved_sam9_lpr1
+        strne   r4, [r5, #AT91_DDRSDRC_LPR]
+
 #else
-        /* Restore LPR on AT91SAM9 */
+        /* Restore LPR on AT91 with SDRAM */
         ldr     r3, .saved_sam9_lpr
-        str     r3, [r2, #AT91_SDRAMC_LPR - AT91_SDRAMC]
+        str     r3, [r2, #AT91_SDRAMC_LPR]
 #endif
 
         /* Restore registers, and return */
@@ -273,18 +296,29 @@ ENTRY(at91_slow_clock)
 .saved_sam9_lpr:
         .word 0
 
+.saved_sam9_lpr1:
+        .word 0
+
 .at91_va_base_pmc:
         .word AT91_VA_BASE_SYS + AT91_PMC
 
 #ifdef CONFIG_ARCH_AT91RM9200
 .at91_va_base_sdramc:
         .word AT91_VA_BASE_SYS
-#elif defined(CONFIG_ARCH_AT91CAP9)
+#elif defined(CONFIG_ARCH_AT91CAP9) \
+        || defined(CONFIG_ARCH_AT91SAM9G45)
 .at91_va_base_sdramc:
-        .word AT91_VA_BASE_SYS + AT91_DDRSDRC
+        .word AT91_VA_BASE_SYS + AT91_DDRSDRC0
 #else
 .at91_va_base_sdramc:
-        .word AT91_VA_BASE_SYS + AT91_SDRAMC
+        .word AT91_VA_BASE_SYS + AT91_SDRAMC0
+#endif
+
+.at91_va_base_ramc1:
+#if defined(CONFIG_ARCH_AT91SAM9G45)
+        .word AT91_VA_BASE_SYS + AT91_DDRSDRC1
+#else
+        .word 0
 #endif
 
 ENTRY(at91_slow_clock_sz)