From: Sylwester Nawrocki <s.nawrocki@samsung.com>
Date: Wed, 30 Jan 2019 14:57:56 +0000 (+0100)
Subject: soc: samsung: chipid: Add exynos_chipid_read_bits() function
X-Git-Tag: submit/tizen/20190329.020226~9
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=refs%2Fchanges%2F42%2F200142%2F4;p=platform%2Fkernel%2Flinux-exynos.git

soc: samsung: chipid: Add exynos_chipid_read_bits() function

Add register read helper function needed by the ASV driver.

Change-Id: I90ec78cff58ac7ff424a50309e83d37605e7cbc7
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
---

diff --git a/drivers/soc/samsung/exynos-chipid.c b/drivers/soc/samsung/exynos-chipid.c
index 4920f0ef2c55..17d06d21bc6f 100644
--- a/drivers/soc/samsung/exynos-chipid.c
+++ b/drivers/soc/samsung/exynos-chipid.c
@@ -44,6 +44,12 @@ unsigned int exynos_chipid_read(unsigned int offset)
 	return readl_relaxed(exynos_chipid_base + offset);
 }
 
+unsigned int exynos_chipid_read_bits(unsigned int offset, unsigned int shift,
+				     unsigned int mask)
+{
+	return (readl_relaxed(exynos_chipid_base + offset) >> shift) & mask;
+}
+
 static const char * __init product_id_to_soc_id(unsigned int product_id)
 {
 	int i;
diff --git a/drivers/soc/samsung/exynos-chipid.h b/drivers/soc/samsung/exynos-chipid.h
index 826a12c25fa2..754528120522 100644
--- a/drivers/soc/samsung/exynos-chipid.h
+++ b/drivers/soc/samsung/exynos-chipid.h
@@ -46,3 +46,5 @@
  #define EXYNOS5422_KFC_DN_MASK		0x03
 
 unsigned int exynos_chipid_read(unsigned int offset);
+unsigned int exynos_chipid_read_bits(unsigned int offset, unsigned int shift,
+					unsigned int mask);