From b8f4f1e8a1b1c43f430561ac5a93a2fb9cbbc8ca Mon Sep 17 00:00:00 2001
From: zhaoyifeng <zyf@rock-chips.com>
Date: Tue, 28 Jun 2011 20:54:52 +0800
Subject: [PATCH] add emmc clk power save config.

---
 drivers/mtd/rknand/Kconfig          | 6 ++++++
 drivers/mtd/rknand/nand_config.h    | 3 +++
 drivers/mtd/rknand/rknand_base.h    | 2 ++
 drivers/mtd/rknand/rknand_base_ko.c | 6 +++++-
 4 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/rknand/Kconfig b/drivers/mtd/rknand/Kconfig
index a3a99d9e956a..58e91664a6e6 100755
--- a/drivers/mtd/rknand/Kconfig
+++ b/drivers/mtd/rknand/Kconfig
@@ -22,6 +22,12 @@ config MTD_RKNAND_BUFFER
 	depends on MTD_RKNAND 
     default y 
 	help 
+	
+config MTD_EMMC_CLK_POWER_SAVE 
+	tristate "RK29 emmc clock power save" 
+	depends on MTD_RKNAND 
+    default n
+	help 
  
 config MTD_NAND_RK29XX_DEBUG 
 	tristate "RK29 Nand driver debug enables" 
diff --git a/drivers/mtd/rknand/nand_config.h b/drivers/mtd/rknand/nand_config.h
index ab19472d40e3..ecdb030d97b0 100755
--- a/drivers/mtd/rknand/nand_config.h
+++ b/drivers/mtd/rknand/nand_config.h
@@ -62,6 +62,9 @@ extern void rkNand_cond_resched(void);
 
 #define COND_RESCHED() rkNand_cond_resched()//cond_resched()
 
+extern unsigned long rk_dma_mem_alloc(int size);
+extern unsigned long rk_dma_mem_free(unsigned long buf);
+
 #define PRINTF RKNAND_DEBUG
 #endif
 
diff --git a/drivers/mtd/rknand/rknand_base.h b/drivers/mtd/rknand/rknand_base.h
index 2bc4f7aa32b6..a22d22df3330 100755
--- a/drivers/mtd/rknand/rknand_base.h
+++ b/drivers/mtd/rknand/rknand_base.h
@@ -66,6 +66,8 @@ struct rknand_info {
     int (*GetIdBlockSysData)(char * buf, int Sector);
     char (*GetSNSectorInfo)(char * pbuf);
     char (*GetChipSectorInfo)(char * pbuf);
+    int emmc_clk_power_save_en;
+    int reserved[20];
 };
 
 extern int rknand_queue_read(int Index, int nSec, void *buf);
diff --git a/drivers/mtd/rknand/rknand_base_ko.c b/drivers/mtd/rknand/rknand_base_ko.c
index 7ee13b22fa93..74d486e31e2c 100755
--- a/drivers/mtd/rknand/rknand_base_ko.c
+++ b/drivers/mtd/rknand/rknand_base_ko.c
@@ -334,7 +334,11 @@ static int rknand_probe(struct platform_device *pdev)
 
     gpNandInfo->bufSize = MAX_BUFFER_SIZE * 512;
     gpNandInfo->pbuf = grknand_buf;
-   
+
+#ifdef CONFIG_MTD_EMMC_CLK_POWER_SAVE
+    gpNandInfo->emmc_clk_power_save_en = 1;
+#endif
+
 	rknand_mtd.name = dev_name(&pdev->dev);
 	rknand_mtd.priv = &nand_info->rknand;
 	rknand_mtd.owner = THIS_MODULE;
-- 
2.34.1