Commit ca85e248 authored by Shubhrajyoti D's avatar Shubhrajyoti D Committed by Wolfram Sang

i2c: omap: cleanup the sysc write

Currently after the reset the sysc is written with hardcoded values.
The patch reads the sysc register and writes back the same value
after reset.

- Some unnecessary rev checks can be optimised.
- Also due to whatever reason the hwmod flags are changed
we will not reset the values.
- In some of the cases the minor values of the 2430 register
is different(0x37) in that case the autoidle setting may be missed.
Signed-off-by: default avatarShubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: default avatarWolfram Sang <w.sang@pengutronix.de>
parent 554c9674
......@@ -305,7 +305,11 @@ static void __omap_i2c_init(struct omap_i2c_dev *dev)
static int omap_i2c_reset(struct omap_i2c_dev *dev)
{
unsigned long timeout;
u16 sysc;
if (dev->rev >= OMAP_I2C_OMAP1_REV_2) {
sysc = omap_i2c_read_reg(dev, OMAP_I2C_SYSC_REG);
/* Disable I2C controller before soft reset */
omap_i2c_write_reg(dev, OMAP_I2C_CON_REG,
omap_i2c_read_reg(dev, OMAP_I2C_CON_REG) &
......@@ -327,22 +331,8 @@ static int omap_i2c_reset(struct omap_i2c_dev *dev)
}
/* SYSC register is cleared by the reset; rewrite it */
if (dev->rev == OMAP_I2C_REV_ON_2430) {
omap_i2c_write_reg(dev, OMAP_I2C_SYSC_REG,
SYSC_AUTOIDLE_MASK);
omap_i2c_write_reg(dev, OMAP_I2C_SYSC_REG, sysc);
} else if (dev->rev >= OMAP_I2C_REV_ON_3430_3530) {
dev->syscstate = SYSC_AUTOIDLE_MASK;
dev->syscstate |= SYSC_ENAWAKEUP_MASK;
dev->syscstate |= (SYSC_IDLEMODE_SMART <<
__ffs(SYSC_SIDLEMODE_MASK));
dev->syscstate |= (SYSC_CLOCKACTIVITY_FCLK <<
__ffs(SYSC_CLOCKACTIVITY_MASK));
omap_i2c_write_reg(dev, OMAP_I2C_SYSC_REG,
dev->syscstate);
}
}
return 0;
}
......
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