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Subject[PATCH RFC 2/8] soc: samsung: Exynos chipid driver update
Date
This patch adds definition of selected CHIP ID register offsets
and register bit field definitions for Exynos5422 SoC.

exynos_chipid_read() helper function is added to allow reading
the CHIP ID block registers.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
---
drivers/soc/samsung/exynos-chipid.c | 16 +++++-----
drivers/soc/samsung/exynos-chipid.h | 48 +++++++++++++++++++++++++++++
2 files changed, 57 insertions(+), 7 deletions(-)
create mode 100644 drivers/soc/samsung/exynos-chipid.h

diff --git a/drivers/soc/samsung/exynos-chipid.c b/drivers/soc/samsung/exynos-chipid.c
index 5cb018807817..4920f0ef2c55 100644
--- a/drivers/soc/samsung/exynos-chipid.c
+++ b/drivers/soc/samsung/exynos-chipid.c
@@ -16,10 +16,7 @@
#include <linux/slab.h>
#include <linux/sys_soc.h>

-#define EXYNOS_SUBREV_MASK (0xF << 4)
-#define EXYNOS_MAINREV_MASK (0xF << 0)
-#define EXYNOS_REV_MASK (EXYNOS_SUBREV_MASK | EXYNOS_MAINREV_MASK)
-#define EXYNOS_MASK 0xFFFFF000
+#include "exynos-chipid.h"

static const struct exynos_soc_id {
const char *name;
@@ -40,6 +37,13 @@ static const struct exynos_soc_id {
{ "EXYNOS5433", 0xE5433000 },
};

+static void __iomem *exynos_chipid_base;
+
+unsigned int exynos_chipid_read(unsigned int offset)
+{
+ return readl_relaxed(exynos_chipid_base + offset);
+}
+
static const char * __init product_id_to_soc_id(unsigned int product_id)
{
int i;
@@ -53,7 +57,6 @@ static const char * __init product_id_to_soc_id(unsigned int product_id)
int __init exynos_chipid_early_init(void)
{
struct soc_device_attribute *soc_dev_attr;
- void __iomem *exynos_chipid_base;
struct soc_device *soc_dev;
struct device_node *root;
struct device_node *np;
@@ -73,9 +76,8 @@ int __init exynos_chipid_early_init(void)
return -ENXIO;
}

- product_id = readl_relaxed(exynos_chipid_base);
+ product_id = exynos_chipid_read(EXYNOS_CHIPID_REG_PRO_ID);
revision = product_id & EXYNOS_REV_MASK;
- iounmap(exynos_chipid_base);

soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
if (!soc_dev_attr)
diff --git a/drivers/soc/samsung/exynos-chipid.h b/drivers/soc/samsung/exynos-chipid.h
new file mode 100644
index 000000000000..826a12c25fa2
--- /dev/null
+++ b/drivers/soc/samsung/exynos-chipid.h
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * EXYNOS - CHIP ID support
+ */
+
+#define EXYNOS_CHIPID_REG_PRO_ID 0x00
+ #define EXYNOS_SUBREV_MASK (0xf << 4)
+ #define EXYNOS_MAINREV_MASK (0xf << 0)
+ #define EXYNOS_REV_MASK (EXYNOS_SUBREV_MASK | \
+ EXYNOS_MAINREV_MASK)
+ #define EXYNOS_MASK 0xfffff000
+
+#define EXYNOS_CHIPID_REG_PKG_ID 0x04
+ #define EXYNOS5422_IDS_OFFSET 24
+ #define EXYNOS5422_IDS_MASK 0xff
+ #define EXYNOS5422_USESG_OFFSET 3
+ #define EXYNOS5422_USESG_MASK 0x01
+ #define EXYNOS5422_SG_OFFSET 0
+ #define EXYNOS5422_SG_MASK 0x07
+ #define EXYNOS5422_TABLE_OFFSET 8
+ #define EXYNOS5422_TABLE_MASK 0x03
+ #define EXYNOS5422_SG_A_OFFSET 17
+ #define EXYNOS5422_SG_A_MASK 0x0f
+ #define EXYNOS5422_SG_B_OFFSET 21
+ #define EXYNOS5422_SG_B_MASK 0x03
+ #define EXYNOS5422_SG_BSIGN_OFFSET 23
+ #define EXYNOS5422_SG_BSIGN_MASK 0x01
+ #define EXYNOS5422_BIN2_OFFSET 12
+ #define EXYNOS5422_BIN2_MASK 0x01
+
+#define EXYNOS_CHIPID_REG_LOT_ID 0x14
+
+#define EXYNOS_CHIPID_AUX_INFO 0x1c
+ #define EXYNOS5422_TMCB_OFFSET 0
+ #define EXYNOS5422_TMCB_MASK 0x7f
+ #define EXYNOS5422_ARM_UP_OFFSET 8
+ #define EXYNOS5422_ARM_UP_MASK 0x03
+ #define EXYNOS5422_ARM_DN_OFFSET 10
+ #define EXYNOS5422_ARM_DN_MASK 0x03
+ #define EXYNOS5422_KFC_UP_OFFSET 12
+ #define EXYNOS5422_KFC_UP_MASK 0x03
+ #define EXYNOS5422_KFC_DN_OFFSET 14
+ #define EXYNOS5422_KFC_DN_MASK 0x03
+
+unsigned int exynos_chipid_read(unsigned int offset);
--
2.17.1
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