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-rw-r--r--arch/powerpc/cpu/mpc85xx/cmd_errata.c5
-rw-r--r--arch/powerpc/include/asm/config_mpc85xx.h16
-rw-r--r--arch/powerpc/include/asm/fsl_i2c.h1
-rw-r--r--arch/powerpc/include/asm/processor.h5
-rw-r--r--drivers/i2c/fsl_i2c.c14
5 files changed, 34 insertions, 7 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
index cbb443fd2..05436f994 100644
--- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c
+++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
@@ -248,6 +248,11 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
#ifdef CONFIG_SYS_FSL_ERRATUM_A005812
puts("Work-around for Erratum A-005812 enabled\n");
#endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_I2C_A004447
+ if ((SVR_SOC_VER(svr) == SVR_8548 && IS_SVR_REV(svr, 3, 1)) ||
+ (SVR_REV(svr) <= CONFIG_SYS_FSL_A004447_SVR_REV))
+ puts("Work-around for Erratum I2C-A004447 enabled\n");
+#endif
return 0;
}
diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h
index e1fc0f72c..cf1bb0279 100644
--- a/arch/powerpc/include/asm/config_mpc85xx.h
+++ b/arch/powerpc/include/asm/config_mpc85xx.h
@@ -67,6 +67,8 @@
#define CONFIG_SYS_FSL_SRIO_IB_WIN_NUM 5
#define CONFIG_SYS_FSL_RMU
#define CONFIG_SYS_FSL_SRIO_MSG_UNIT_NUM 2
+#define CONFIG_SYS_FSL_ERRATUM_I2C_A004447
+#define CONFIG_SYS_FSL_A004447_SVR_REV 0x00
#elif defined(CONFIG_MPC8555)
#define CONFIG_MAX_CPUS 1
@@ -132,6 +134,8 @@
#define CONFIG_SYS_FSL_ERRATUM_IFC_A002769
#define CONFIG_SYS_FSL_ERRATUM_P1010_A003549
#define CONFIG_SYS_FSL_ERRATUM_IFC_A003399
+#define CONFIG_SYS_FSL_ERRATUM_I2C_A004447
+#define CONFIG_SYS_FSL_A004447_SVR_REV 0x10
/* P1011 is single core version of P1020 */
#elif defined(CONFIG_P1011)
@@ -249,6 +253,8 @@
#define CONFIG_SYS_FM_MURAM_SIZE 0x10000
#define CONFIG_SYS_FSL_PCIE_COMPAT "fsl,qoriq-pcie-v2.2"
#define CONFIG_SYS_CCSRBAR_DEFAULT 0xff600000
+#define CONFIG_SYS_FSL_ERRATUM_I2C_A004447
+#define CONFIG_SYS_FSL_A004447_SVR_REV 0x11
/* P1024 is lower end variant of P1020 */
#elif defined(CONFIG_P1024)
@@ -334,6 +340,8 @@
#define CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 0xf0000000
#define CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
#define CONFIG_SYS_FSL_ERRATUM_A004849
+#define CONFIG_SYS_FSL_ERRATUM_I2C_A004447
+#define CONFIG_SYS_FSL_A004447_SVR_REV 0x11
#elif defined(CONFIG_PPC_P3041)
#define CONFIG_SYS_FSL_QORIQ_CHASSIS1
@@ -369,6 +377,8 @@
#define CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
#define CONFIG_SYS_FSL_ERRATUM_A004849
#define CONFIG_SYS_FSL_ERRATUM_A005812
+#define CONFIG_SYS_FSL_ERRATUM_I2C_A004447
+#define CONFIG_SYS_FSL_A004447_SVR_REV 0x20
#elif defined(CONFIG_PPC_P4080) /* also supports P4040 */
#define CONFIG_SYS_FSL_QORIQ_CHASSIS1
@@ -415,6 +425,8 @@
#define CONFIG_SYS_FSL_ERRATUM_A004580
#define CONFIG_SYS_P4080_ERRATUM_PCIE_A003
#define CONFIG_SYS_FSL_ERRATUM_A005812
+#define CONFIG_SYS_FSL_ERRATUM_I2C_A004447
+#define CONFIG_SYS_FSL_A004447_SVR_REV 0x20
#elif defined(CONFIG_PPC_P5020) /* also supports P5010 */
#define CONFIG_SYS_PPC64 /* 64-bit core */
@@ -446,6 +458,8 @@
#define CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 0x10
#define CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 0xc0000000
#define CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
+#define CONFIG_SYS_FSL_ERRATUM_I2C_A004447
+#define CONFIG_SYS_FSL_A004447_SVR_REV 0x20
#elif defined(CONFIG_PPC_P5040)
#define CONFIG_SYS_PPC64
@@ -510,6 +524,8 @@
#define CONFIG_SYS_FSL_ERRATUM_ESDHC111
#define CONFIG_SYS_FSL_ESDHC_P1010_BROKEN_SDCLK
#define CONFIG_SYS_FSL_PCIE_COMPAT "fsl,qoriq-pcie-v2.2"
+#define CONFIG_SYS_FSL_ERRATUM_I2C_A004447
+#define CONFIG_SYS_FSL_A004447_SVR_REV 0x11
#elif defined(CONFIG_PPC_T4240) || defined(CONFIG_PPC_T4160)
#define CONFIG_E6500
diff --git a/arch/powerpc/include/asm/fsl_i2c.h b/arch/powerpc/include/asm/fsl_i2c.h
index 4f7134132..d6537fd63 100644
--- a/arch/powerpc/include/asm/fsl_i2c.h
+++ b/arch/powerpc/include/asm/fsl_i2c.h
@@ -54,6 +54,7 @@ typedef struct fsl_i2c {
#define I2C_CR_MTX 0x10
#define I2C_CR_TXAK 0x08
#define I2C_CR_RSTA 0x04
+#define I2C_CR_BIT6 0x02 /* required for workaround A004447 */
#define I2C_CR_BCST 0x01
u8 sr; /* I2C status register */
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index 64a6f9c54..bcf6cfb09 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -847,7 +847,7 @@
/* System-On-Chip Version Register (SVR) field extraction */
#define SVR_VER(svr) (((svr) >> 16) & 0xFFFF) /* Version field */
-#define SVR_REV(svr) (((svr) >> 0) & 0xFFFF) /* Revision field */
+#define SVR_REV(svr) (((svr) >> 0) & 0xFF) /* Revision field */
#define SVR_CID(svr) (((svr) >> 28) & 0x0F) /* Company or manufacturer ID */
#define SVR_SOCOP(svr) (((svr) >> 22) & 0x3F) /* SOC integration options */
@@ -1043,9 +1043,6 @@
/* System Version Register (SVR) field extraction */
-#define SVR_VER(svr) (((svr) >> 16) & 0xFFFF) /* Version field */
-#define SVR_REV(svr) (((svr) >> 0) & 0xFFFF) /* Revison field */
-
#define SVR_SUBVER(svr) (((svr) >> 8) & 0xFF) /* Process/MFG sub-version */
#define SVR_FAM(svr) (((svr) >> 20) & 0xFFF) /* Family field */
diff --git a/drivers/i2c/fsl_i2c.c b/drivers/i2c/fsl_i2c.c
index 44b08f767..291ad946d 100644
--- a/drivers/i2c/fsl_i2c.c
+++ b/drivers/i2c/fsl_i2c.c
@@ -211,6 +211,14 @@ static int fsl_i2c_fixup(const struct fsl_i2c *dev)
const unsigned long long timeout = usec2ticks(CONFIG_I2C_MBB_TIMEOUT);
unsigned long long timeval = 0;
int ret = -1;
+ unsigned int flags = 0;
+
+#ifdef CONFIG_SYS_FSL_ERRATUM_I2C_A004447
+ unsigned int svr = get_svr();
+ if ((SVR_SOC_VER(svr) == SVR_8548 && IS_SVR_REV(svr, 3, 1)) ||
+ (SVR_REV(svr) <= CONFIG_SYS_FSL_A004447_SVR_REV))
+ flags = I2C_CR_BIT6;
+#endif
writeb(I2C_CR_MEN | I2C_CR_MSTA, &dev->cr);
@@ -224,8 +232,8 @@ static int fsl_i2c_fixup(const struct fsl_i2c *dev)
/* SDA is stuck low */
writeb(0, &dev->cr);
udelay(100);
- writeb(I2C_CR_MSTA, &dev->cr);
- writeb(I2C_CR_MEN | I2C_CR_MSTA, &dev->cr);
+ writeb(I2C_CR_MSTA | flags, &dev->cr);
+ writeb(I2C_CR_MEN | I2C_CR_MSTA | flags, &dev->cr);
}
readb(&dev->dr);
@@ -238,7 +246,7 @@ static int fsl_i2c_fixup(const struct fsl_i2c *dev)
ret = 0;
err:
- writeb(I2C_CR_MEN, &dev->cr);
+ writeb(I2C_CR_MEN | flags, &dev->cr);
writeb(0, &dev->sr);
udelay(100);
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 23:25:30 +0000