Peripherals like I2C and SPI needs to be taken out of reset during
board init for functioning properly. Hence, add `hi6220_periph_reset`
function for doing the same. For instance without this function, I2C
will fail like below while booting linux:
[ 0.608033] i2c_designware f7100000.i2c: Unknown Synopsys component type:
0x00000000
[ 0.621378] i2c_designware f7101000.i2c: Unknown Synopsys component type:
0x00000000
[ 0.633818] i2c_designware f7102000.i2c: Unknown Synopsys component type:
0x00000000
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasi...@linaro.org>
---
board/hisilicon/hikey/hikey.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/board/hisilicon/hikey/hikey.c b/board/hisilicon/hikey/hikey.c
index 940ae82c45b..f8b8c372bfd 100644
--- a/board/hisilicon/hikey/hikey.c
+++ b/board/hisilicon/hikey/hikey.c
@@ -364,6 +364,20 @@ static void hi6220_pmussi_init(void)
gpio_direction_output(0, 1);
}
+static void hi6220_periph_reset(void)
+{
+ u32 data, bits;
+
+ /* Bring I2C0/I2C1/I2C2/SPI0 out of reset */
+ bits = PERI_RST3_I2C0 | PERI_RST3_I2C1 | PERI_RST3_I2C2 | PERI_RST3_SSP;
+ writel(bits, &peri_sc->rst3_dis);
+
+ /* Wait until the peripherals are out of reset */
+ do {
+ data = readl(&peri_sc->rst3_dis);
+ } while (data & bits);
+}
+
int misc_init_r(void)
{
return 0;
@@ -371,6 +385,8 @@ int misc_init_r(void)
int board_init(void)
{
+ hi6220_periph_reset();
+
return 0;
}
--
2.17.1
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