From b6a77b0ce8ac21c154f02907c364b6d3e3c8af5e Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Wed, 27 Apr 2016 09:02:12 +0200 Subject: [PATCH] i2c: designware_i2c: Optionally check enable status register Some platforms don't implement the enable status register at offset 0x9c. The SPEAr600 platform is one of them. The recently added check to this status register can't be performend on these platforms. This patch introduces a new config option that can be enabled on such platforms not supporting this register. Signed-off-by: Stefan Roese Cc: Heiko Schocher Reviewed-by: Heiko Schocher --- drivers/i2c/designware_i2c.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/i2c/designware_i2c.c b/drivers/i2c/designware_i2c.c index 0c7cd0b..e60fd0a 100644 --- a/drivers/i2c/designware_i2c.c +++ b/drivers/i2c/designware_i2c.c @@ -36,6 +36,14 @@ struct dw_i2c { struct dw_scl_sda_cfg *scl_sda_cfg; }; +#ifdef CONFIG_SYS_I2C_DW_ENABLE_STATUS_UNSUPPORTED +static void dw_i2c_enable(struct i2c_regs *i2c_base, bool enable) +{ + u32 ena = enable ? IC_ENABLE_0B : 0; + + writel(ena, &i2c_base->ic_enable); +} +#else static void dw_i2c_enable(struct i2c_regs *i2c_base, bool enable) { u32 ena = enable ? IC_ENABLE_0B : 0; @@ -56,6 +64,7 @@ static void dw_i2c_enable(struct i2c_regs *i2c_base, bool enable) printf("timeout in %sabling I2C adapter\n", enable ? "en" : "dis"); } +#endif /* * i2c_set_bus_speed - Set the i2c speed