From 466374924ccfc3c1306ca030b62d1de5ba3a1fba Mon Sep 17 00:00:00 2001
From: Furquan Shaikh <furquan@google.com>
Date: Wed, 3 Jun 2020 16:22:20 -0700
Subject: [PATCH] soc/amd/picasso: Add set_mmio_dev_ops() to set ops for MMIO
 devices

This change adds a helper function set_mmio_dev_ops() in chip.c which
is used for setting the dev->ops for MMIO devices based on the
comparison of MMIO address in device tree to the pre-defined base
addresses in iomap.h.

Call to i2c_acpi_name() is replaced with set_mmio_dev_ops and scope of
i2c_acpi_name is restricted to i2c.c since it is not required to be
exposed out of that file.

Change-Id: I31f96cfe8267b0df37012baeb7cfcaec9c2280f6
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42067
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
---
 src/soc/amd/picasso/chip.c | 16 +++++++++++++---
 src/soc/amd/picasso/i2c.c  |  5 +----
 2 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/src/soc/amd/picasso/chip.c b/src/soc/amd/picasso/chip.c
index dc661d2be3..ed39b53549 100644
--- a/src/soc/amd/picasso/chip.c
+++ b/src/soc/amd/picasso/chip.c
@@ -8,6 +8,7 @@
 #include <soc/acpi.h>
 #include <soc/cpu.h>
 #include <soc/data_fabric.h>
+#include <soc/iomap.h>
 #include <soc/pci_devs.h>
 #include <soc/southbridge.h>
 #include "chip.h"
@@ -15,7 +16,6 @@
 
 /* Supplied by i2c.c */
 extern struct device_operations picasso_i2c_mmio_ops;
-extern const char *i2c_acpi_name(const struct device *dev);
 
 struct device_operations cpu_bus_ops = {
 	.read_resources	  = noop_read_resources,
@@ -119,6 +119,17 @@ static struct device_operations pci_ops_ops_bus_ab = {
 	.acpi_fill_ssdt		= acpi_device_write_pci_dev,
 };
 
+static void set_mmio_dev_ops(struct device *dev)
+{
+	switch (dev->path.mmio.addr) {
+	case APU_I2C2_BASE:
+	case APU_I2C3_BASE:
+	case APU_I2C4_BASE:
+		dev->ops = &picasso_i2c_mmio_ops;
+		break;
+	}
+}
+
 static void enable_dev(struct device *dev)
 {
 	/* Set the operations if it is a special bus type */
@@ -136,8 +147,7 @@ static void enable_dev(struct device *dev)
 		}
 		sb_enable(dev);
 	} else if (dev->path.type == DEVICE_PATH_MMIO) {
-		if (i2c_acpi_name(dev) != NULL)
-			dev->ops = &picasso_i2c_mmio_ops;
+		set_mmio_dev_ops(dev);
 	}
 }
 
diff --git a/src/soc/amd/picasso/i2c.c b/src/soc/amd/picasso/i2c.c
index 4c8c6697af..fa59b994a2 100644
--- a/src/soc/amd/picasso/i2c.c
+++ b/src/soc/amd/picasso/i2c.c
@@ -13,9 +13,6 @@
 #include <soc/southbridge.h>
 #include "chip.h"
 
-/* Global to provide access to chip.c */
-const char *i2c_acpi_name(const struct device *dev);
-
 /*
  * We don't have addresses for I2C0-1.
  */
@@ -48,7 +45,7 @@ const struct dw_i2c_bus_config *dw_i2c_get_soc_cfg(unsigned int bus)
 	return &config->i2c[bus];
 }
 
-const char *i2c_acpi_name(const struct device *dev)
+static const char *i2c_acpi_name(const struct device *dev)
 {
 	switch (dev->path.mmio.addr) {
 	case APU_I2C2_BASE: