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authorTetsuyuki Kobayashi2012-11-20 16:29:16 +0000
committerAlbert ARIBAUD2013-02-02 23:45:28 +0100
commitf68847fa2ffe323addd57fafe5cd59e2d8d21b49 (patch)
treedd6261a434c11e3b623d00cb59920fb2ac223e88 /board/kmc/kzm9g
parente5f5c4a977c411c0cd3899a4f9487eea77a0e150 (diff)
arm: rmobile: kzm9g: Adjust SDRAM setting
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>
Diffstat (limited to 'board/kmc/kzm9g')
-rw-r--r--board/kmc/kzm9g/kzm9g.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/board/kmc/kzm9g/kzm9g.c b/board/kmc/kzm9g/kzm9g.c
index 54f25e097cb..1aeb5fe0b7d 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 */