Re: [U-Boot] [PATCH 1/2] arm: rmobile: kzm9g: Adjust SDRAM setting

21 Nov 2012

On Wed, Nov 21, 2012 at 11:29 AM, Tetsuyuki Kobayashi koba@kmckk.co.jp wrote:
...
After stress test, I found some of kzm9g board occures memory failure.
This patch adust SDRAM setting.

Enlarge drivability on both SDRAM controller and SDRAM itself
Raise core voltage

Signed-off-by: Tetsuyuki Kobayashi koba@kmckk.co.jp
Acked-by: Nobuhiro Iwamatsu nobuhiro.iwamatsu.yj@renesas.com
...

board/kmc/kzm9g/kzm9g.c |   17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/board/kmc/kzm9g/kzm9g.c b/board/kmc/kzm9g/kzm9g.c
index 54f25e0..1aeb5fe 100644
--- a/board/kmc/kzm9g/kzm9g.c
+++ b/board/kmc/kzm9g/kzm9g.c
@@ -84,7 +84,7 @@ static void sbsc_init(struct sh73a0_sbsc *sbsc)
        writel(0x0017040a, &sbsc->sdwcr01);
        writel(0x31020707, &sbsc->sdwcr10);
        writel(0x0017040a, &sbsc->sdwcr11);

  writel(0x05555555, &sbsc->sddrvcr0);




  writel(0x055557ff, &sbsc->sddrvcr0); /* Enlarge drivability of LPDQS0-3, LPCLK */
  writel(0x30000000, &sbsc->sdwcr2);

  writel(readl(&sbsc->sdpcr) | 0x80, &sbsc->sdpcr);



@@ -112,7 +112,7 @@ static void sbsc_init(struct sh73a0_sbsc *sbsc)
                writel(0x0, SDMRA1A);
                writel(0x00000402, &sbsc->sdmracr0);
                writel(0x0, SDMRA1A);

          writel(0x00000403, &sbsc->sdmracr0);




          writel(0x00000203, &sbsc->sdmracr0); /* MR3 register DS=2 */
          writel(0x0, SDMRA1A);
          writel(0x0, SDMRA2A);
  } else {



@@ -120,7 +120,7 @@ static void sbsc_init(struct sh73a0_sbsc *sbsc)
                writel(0x0, SDMRA1B);
                writel(0x00000402, &sbsc->sdmracr0);
                writel(0x0, SDMRA1B);

          writel(0x00000403, &sbsc->sdmracr0);




          writel(0x00000203, &sbsc->sdmracr0); /* MR3 register DS=2 */
          writel(0x0, SDMRA1B);
          writel(0x0, SDMRA2B);
  }



@@ -301,8 +301,19 @@ int board_early_init_f(void)
        return 0;
 }
+void adjust_core_voltage(void)
+{

  u8 data;



  i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);


  data = 0x35;


  i2c_set_bus_num(0);


  i2c_write(0x40, 3, 1, &data, 1);



+}



int board_init(void)
 {

  adjust_core_voltage();
  sh73a0_pinmux_init();


/* SCIFA 4 */


--
1.7.9.5

U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
-- 
Nobuhiro Iwamatsu

    