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clear i2c ints before the transfer starts

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If transfer is restarted in irq handler the interrupts shall be
cleared before the start bit is set in control register. This is
to avoid ints being accidentally cleared before they are handled leading
to timeout error.
This commit is contained in:
Jari Nippula
2023-03-02 22:25:56 +08:00
committed by Xiang Xiao
parent da76aa71aa
commit aeddec2ec5
1 changed files with 9 additions and 0 deletions
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arch/risc-v/src/mpfs/mpfs_i2c.c
+9
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@@ -396,6 +396,11 @@ static int mpfs_i2c_irq(int cpuint, void *context, void *arg)
break;
case MPFS_I2C_ST_LOST_ARB:
/* Clear interrupt. */
modifyreg32(MPFS_I2C_CTRL, MPFS_I2C_CTRL_SI_MASK, 0);
clear_irq = 0u;
modifyreg32(MPFS_I2C_CTRL, MPFS_I2C_CTRL_STA_MASK,
MPFS_I2C_CTRL_STA_MASK);
break;
@@ -416,6 +421,10 @@ static int mpfs_i2c_irq(int cpuint, void *context, void *arg)
}
else if (msg->flags & I2C_M_NOSTOP)
{
/* Clear interrupt. */
modifyreg32(MPFS_I2C_CTRL, MPFS_I2C_CTRL_SI_MASK, 0);
clear_irq = 0u;
modifyreg32(MPFS_I2C_CTRL, MPFS_I2C_CTRL_STA_MASK,
MPFS_I2C_CTRL_STA_MASK);