[U-Boot] [PATCH 7/9] mxs: spl_mem_init: Remove unneeded DRAM configurations

Fabio Estevam
2013-05-01T21:44:47Z

From: Fabio Estevam <fabio.estevam@freescale.com>

There is no need to write to DRAM_CTL8 register prior to nitialize_dram_values().

Fix a comment related to writing to DRAM_CTL8.

Also, DRAM_CTL18 register on mx23 does not contain DRAM init complete bit, so
remove this setting as this is also not done by FSL bootlets code.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
index 1c509d6..cde883d 100644
--- a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
+++ b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
@@ -262,12 +262,9 @@ static void mx23_mem_init(void)
* Configure the DRAM registers
*/

- /* Clear START and SREFRESH bit from DRAM_CTL8 */
- clrbits_le32(MXS_DRAM_BASE + 0x20, (1 << 16) | (1 << 8));
-
initialize_dram_values();

- /* Set START bit in DRAM_CTL16 */
+ /* Set START bit in DRAM_CTL8 */
setbits_le32(MXS_DRAM_BASE + 0x20, 1 << 16);

clrbits_le32(MXS_DRAM_BASE + 0x40, 1 << 17);
@@ -279,10 +276,6 @@ static void mx23_mem_init(void)

setbits_le32(MXS_DRAM_BASE + 0x40, 1 << 19);
setbits_le32(MXS_DRAM_BASE + 0x40, 1 << 11);
-
- /* Wait for bit 10 (DRAM init complete) in DRAM_CTL18 */
- while (!(readl(MXS_DRAM_BASE + 0x48) & (1 << 10)))
- ;
}
#endif

--
1.7.9.5