[U-Boot] [PATCH 28/28] armv8/fsl-lsch3: Implement workaround for I2C issue

[York Sun]

This erratum requires setting GLITCH_EN bit in debug register.

Signed-off-by: York Sun <yorksun at freescale.com>
---
 arch/arm/cpu/armv8/fsl-lsch3/soc.c |   30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm/cpu/armv8/fsl-lsch3/soc.c b/arch/arm/cpu/armv8/fsl-lsch3/soc.c
index ca00108..4d9df20 100644
--- a/arch/arm/cpu/armv8/fsl-lsch3/soc.c
+++ b/arch/arm/cpu/armv8/fsl-lsch3/soc.c
@@ -37,11 +37,41 @@ static void erratum_rcw_src(void)
 #endif
 }
 
+#define I2C_DEBUG_REG 0x6
+#define I2C_GLITCH_EN 0x8
+static void erratum_i2c(void)
+{
+	u8 __iomem *ptr;
+#ifdef CONFIG_SYS_I2C
+#ifdef I2C1_BASE_ADDR
+	ptr = (u8 __iomem *)(I2C1_BASE_ADDR + I2C_DEBUG_REG);
+
+	writeb(I2C_GLITCH_EN, ptr);
+#endif
+#ifdef I2C2_BASE_ADDR
+	ptr = (u8 __iomem *)(I2C2_BASE_ADDR + I2C_DEBUG_REG);
+
+	writeb(I2C_GLITCH_EN, ptr);
+#endif
+#ifdef I2C3_BASE_ADDR
+	ptr = (u8 __iomem *)(I2C3_BASE_ADDR + I2C_DEBUG_REG);
+
+	writeb(I2C_GLITCH_EN, ptr);
+#endif
+#ifdef I2C4_BASE_ADDR
+	ptr = (u8 __iomem *)(I2C4_BASE_ADDR + I2C_DEBUG_REG);
+
+	writeb(I2C_GLITCH_EN, ptr);
+#endif
+#endif
+}
+
 void fsl_lsch3_early_init_f(void)
 {
 	erratum_a008751();
 	erratum_rcw_src();
 	init_early_memctl_regs();	/* tighten IFC timing */
+	erratum_i2c();
 }
 
 #ifdef CONFIG_SPL_BUILD
-- 
1.7.9.5