diff options
| -rw-r--r-- | src/soc/samsung/exynos5420/i2c.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/src/soc/samsung/exynos5420/i2c.c b/src/soc/samsung/exynos5420/i2c.c index 226862802a..6ca0087e5b 100644 --- a/src/soc/samsung/exynos5420/i2c.c +++ b/src/soc/samsung/exynos5420/i2c.c @@ -210,7 +210,7 @@ static int WaitForXfer(struct s3c24x0_i2c *i2c) static void ReadWriteByte(struct s3c24x0_i2c *i2c) { - writel(read32(&i2c->iiccon) & ~I2CCON_IRPND, &i2c->iiccon); + write32(read32(&i2c->iiccon) & ~I2CCON_IRPND, &i2c->iiccon); } static void i2c_ch_init(struct s3c24x0_i2c_bus *bus, int speed, int slaveadd) @@ -318,7 +318,7 @@ static void hsi2c_ch_init(struct s3c24x0_i2c_bus *i2c_bus, write32(HSI2C_RXFIFO_EN | HSI2C_TXFIFO_EN, &hsregs->usi_fifo_ctl); /* i2c_conf configure */ - write32(readl(&hsregs->usi_conf) | HSI2C_AUTO_MODE, &hsregs->usi_conf); + write32(read32(&hsregs->usi_conf) | HSI2C_AUTO_MODE, &hsregs->usi_conf); } /* SW reset for the high speed bus */ @@ -484,17 +484,19 @@ static int hsi2c_read(struct exynos5_hsi2c *i2c, /* chip address */ write32(HSI2C_SLV_ADDR_MAS(chip), &i2c->i2c_addr); - /* usi_ctl enable i2c func, master write configure */ - write32((HSI2C_TXCHON | HSI2C_FUNC_MODE_I2C | HSI2C_MASTER), - &i2c->usi_ctl); + if (alen) { + /* usi_ctl enable i2c func, master write configure */ + write32(HSI2C_TXCHON | HSI2C_FUNC_MODE_I2C | HSI2C_MASTER, + &i2c->usi_ctl); - /* auto_conf */ - write32(alen | HSI2C_MASTER_RUN | HSI2C_STOP_AFTER_TRANS, - &i2c->usi_auto_conf); + /* auto_conf */ + write32(alen | HSI2C_MASTER_RUN | HSI2C_STOP_AFTER_TRANS, + &i2c->usi_auto_conf); - if (hsi2c_senddata(i2c, addr, alen) || - hsi2c_wait_for_transfer(i2c) != 1) { - return -1; + if (hsi2c_senddata(i2c, addr, alen) || + hsi2c_wait_for_transfer(i2c) != 1) { + return -1; + } } /* usi_ctl enable i2c func, master WRITE configure */ @@ -542,7 +544,7 @@ static int i2c_transfer(struct s3c24x0_i2c *i2c, timer_monotonic_get(¤t); end = current; mono_time_add_usecs(&end, I2C_TIMEOUT_MS * 1000); - while (readl(&i2c->iicstat) & I2CSTAT_BSY) { + while (read32(&i2c->iicstat) & I2CSTAT_BSY) { if (!mono_time_before(¤t, &end)){ printk(BIOS_ERR, "%s timed out\n", __func__); return I2C_NOK_TOUT; @@ -607,7 +609,7 @@ static int i2c_transfer(struct s3c24x0_i2c *i2c, while ((i < data_len) && (result == I2C_OK)) { /* disable ACK for final READ */ if (i == data_len - 1) - write32(readl(&i2c->iiccon) + write32(read32(&i2c->iiccon) & ~I2CCON_ACKGEN, &i2c->iiccon); ReadWriteByte(i2c); |