From 8f0ab72d6f4bcc20ab0c6b47ece9c1c872f6ca09 Mon Sep 17 00:00:00 2001 From: Andy Green Date: Thu, 3 Mar 2011 13:50:44 +0000 Subject: OMAP3 and 4 I2C use cpu type consistently for new register availability The driver makes the choice about which register layout to use based on cpu, however it then tries to use the probed peripheral unit version register to decide whether to access registers that only exist in the 4430 unit. Unfortunately, the unit with the smaller register map on the OMAP3530 has the same peripheral unit version number, leading the OMAP3530 to dereference the register map beyond the bounds of its array, and then to access a 'random' register offset taken from whatever happens to be sitting beyond the register map array, as reported here https://bugs.launchpad.net/linux-linaro/+bug/645324 This patch makes both the choice of register map and the decision to use a register only present in the larger map both do so based on cpu type, which correctly reflects register availability. Cc: patches@linaro.org Reported-by: Peter Maydell Signed-off-by: Andy Green Signed-off-by: Nicolas Pitre --- drivers/i2c/busses/i2c-omap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/i2c/busses/i2c-omap.c') diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index 843fccc703d..c82db907744 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -309,7 +309,7 @@ static void omap_i2c_idle(struct omap_i2c_dev *dev) pdata = pdev->dev.platform_data; dev->iestate = omap_i2c_read_reg(dev, OMAP_I2C_IE_REG); - if (dev->rev >= OMAP_I2C_REV_ON_4430) + if (cpu_is_omap44xx()) omap_i2c_write_reg(dev, OMAP_I2C_OMAP4430_IRQENABLE_CLR, 1); else omap_i2c_write_reg(dev, OMAP_I2C_IE_REG, 0); -- cgit v1.2.3