[S] Change in coreboot[main]: [WIP] soc/amd/genoa: add I2C pad control support

[Felix Held (Code Review)]

Felix Held has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/79177?usp=email )

Change subject: [WIP] soc/amd/genoa: add I2C pad control support
......................................................................

[WIP] soc/amd/genoa: add I2C pad control support

Still need to find out for sure which type of pad control register is
used for I2C4 and I2C5.

Signed-off-by: Felix Held 
Change-Id: Ibc14a6de60be84460418703472293814e9a51379
---
M src/soc/amd/genoa/Kconfig
M src/soc/amd/genoa/chip.h
M src/soc/amd/genoa/i2c.c
3 files changed, 14 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/77/79177/1

diff --git a/src/soc/amd/genoa/Kconfig b/src/soc/amd/genoa/Kconfig
index cbf0ddd..bca6ed4 100644
--- a/src/soc/amd/genoa/Kconfig
+++ b/src/soc/amd/genoa/Kconfig
@@ -21,6 +21,8 @@
    select SOC_AMD_COMMON_BLOCK_DATA_FABRIC_EXTENDED_MMIO
    select SOC_AMD_COMMON_BLOCK_HAS_ESPI
    select SOC_AMD_COMMON_BLOCK_I2C
+	select SOC_AMD_COMMON_BLOCK_I2C_PAD_CTRL
+	select SOC_AMD_COMMON_BLOCK_I23C_PAD_CTRL
    select SOC_AMD_COMMON_BLOCK_IOMMU
    select SOC_AMD_COMMON_BLOCK_LPC
    select SOC_AMD_COMMON_BLOCK_MCAX
diff --git a/src/soc/amd/genoa/chip.h b/src/soc/amd/genoa/chip.h
index bca40af..5713a72 100644
--- a/src/soc/amd/genoa/chip.h
+++ b/src/soc/amd/genoa/chip.h
@@ -14,6 +14,7 @@

u8 i2c_scl_reset;
    struct dw_i2c_bus_config i2c[I2C_CTRLR_COUNT];
+	struct i2c_pad_control i2c_pad[I2C_CTRLR_COUNT];
 };

#endif
diff --git a/src/soc/amd/genoa/i2c.c b/src/soc/amd/genoa/i2c.c
index 76c1049..0a1f4fb 100644
--- a/src/soc/amd/genoa/i2c.c
+++ b/src/soc/amd/genoa/i2c.c
@@ -38,7 +38,17 @@

void soc_i2c_misc_init(unsigned int bus, const struct dw_i2c_bus_config *cfg)
 {
-	/* TODO: write I2C pad control registers */
+	const struct soc_amd_genoa_config *config = config_of_soc();
+
+	if (bus >= ARRAY_SIZE(config->i2c_pad))
+		return;
+
+	/* The I/O pads of I2C0..3 are the new I23C pads and the I/O pads of I2C4..5 still are
+	   the same I2C pads as in Picasso and Cezanne. TODO: verify if this is true */
+	if (bus <= 3)
+		fch_i23c_pad_init(bus, cfg->speed, &config->i2c_pad[bus]);
+	else
+		fch_i2c_pad_init(bus, cfg->speed, &config->i2c_pad[bus]);
 }

const struct soc_i2c_ctrlr_info *soc_get_i2c_ctrlr_info(size_t *num_ctrlrs)