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 --- 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 */