diff options
| author | Sylvain Lemieux <slemieux@tycoint.com> | 2015-08-04 17:04:41 -0400 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2015-08-18 13:45:57 -0400 |
| commit | 1933af15e2ce9dfdf64d6c663eb16963ae0341ad (patch) | |
| tree | a889db69a047807a06227463b427f0f63aee6888 /drivers/i2c | |
| parent | 30cb3bf4a961dcd59a8f72f714e900cbfe7991dd (diff) | |
| download | blackbird-obmc-uboot-1933af15e2ce9dfdf64d6c663eb16963ae0341ad.tar.gz blackbird-obmc-uboot-1933af15e2ce9dfdf64d6c663eb16963ae0341ad.zip | |
i2c: lpc32xx: add support for OTG I2C
Updated the LPC32xx I2C driver to support
the OTG I2C that is part of the USB module.
Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
Acked-by: Marek Vasut <marex@denx.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/lpc32xx_i2c.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/i2c/lpc32xx_i2c.c b/drivers/i2c/lpc32xx_i2c.c index 7f4eccdf53..e63260cc9b 100644 --- a/drivers/i2c/lpc32xx_i2c.c +++ b/drivers/i2c/lpc32xx_i2c.c @@ -1,7 +1,7 @@ /* * LPC32xx I2C interface driver * - * (C) Copyright 2014 DENX Software Engineering GmbH + * (C) Copyright 2014-2015 DENX Software Engineering GmbH * Written-by: Albert ARIBAUD - 3ADEV <albert.aribaud@3adev.fr> * * SPDX-License-Identifier: GPL-2.0+ @@ -60,7 +60,8 @@ struct lpc32xx_i2c_registers { static struct lpc32xx_i2c_registers *lpc32xx_i2c[] = { (struct lpc32xx_i2c_registers *)I2C1_BASE, - (struct lpc32xx_i2c_registers *)I2C2_BASE + (struct lpc32xx_i2c_registers *)I2C2_BASE, + (struct lpc32xx_i2c_registers *)(USB_BASE + 0x300) }; /* Set I2C bus speed */ @@ -68,11 +69,17 @@ static unsigned int lpc32xx_i2c_set_bus_speed(struct i2c_adapter *adap, unsigned int speed) { int half_period; + int clk_rate; if (speed == 0) return -EINVAL; - half_period = (get_hclk_clk_rate() / speed) / 2; + if (adap->hwadapnr == 2) + /* OTG I2C clock source is different. */ + clk_rate = get_periph_clk_rate(); + else + clk_rate = get_hclk_clk_rate(); + half_period = (clk_rate / speed) / 2; if ((half_period > 255) || (half_period < 0)) return -EINVAL; @@ -249,3 +256,10 @@ U_BOOT_I2C_ADAP_COMPLETE(lpc32xx_1, _i2c_init, lpc32xx_i2c_probe, CONFIG_SYS_I2C_LPC32XX_SPEED, CONFIG_SYS_I2C_LPC32XX_SLAVE, 1) + +U_BOOT_I2C_ADAP_COMPLETE(lpc32xx_2, _i2c_init, NULL, + lpc32xx_i2c_read, lpc32xx_i2c_write, + lpc32xx_i2c_set_bus_speed, + 100000, + 0, + 2) |
