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authorHeiner Kallweit <hkallweit1@gmail.com>2017-10-04 21:56:44 +0300
committerSudeep Holla <sudeep.holla@arm.com>2017-10-05 13:48:27 +0300
commitd9e324ea138b43c2cfb6b01e3ae02a84be55aef4 (patch)
tree421f0ed80bf946a7f20a8f6c912cc7fe772bbfa6 /drivers/firmware/arm_scpi.c
parent95998c7a6cf76a24a553bec7f6fafdef6b4d3374 (diff)
downloadlinux-d9e324ea138b43c2cfb6b01e3ae02a84be55aef4.tar.xz
firmware: arm_scpi: improve struct dvfs_info to make code better readable
Making the header subfields members of struct dvfs_info allows to make the code better readable and avoids some macro magic. In addition remove a useless statement using info->latency. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware/arm_scpi.c')
-rw-r--r--drivers/firmware/arm_scpi.c13
1 files changed, 5 insertions, 8 deletions
diff --git a/drivers/firmware/arm_scpi.c b/drivers/firmware/arm_scpi.c
index f713a64c1052..412f1c4cf616 100644
--- a/drivers/firmware/arm_scpi.c
+++ b/drivers/firmware/arm_scpi.c
@@ -72,8 +72,6 @@
#define MAX_DVFS_DOMAINS 8
#define MAX_DVFS_OPPS 16
-#define DVFS_LATENCY(hdr) (le32_to_cpu(hdr) >> 16)
-#define DVFS_OPP_COUNT(hdr) ((le32_to_cpu(hdr) >> 8) & 0xff)
#define PROTOCOL_REV_MINOR_BITS 16
#define PROTOCOL_REV_MINOR_MASK ((1U << PROTOCOL_REV_MINOR_BITS) - 1)
@@ -328,7 +326,9 @@ struct legacy_clk_set_value {
} __packed;
struct dvfs_info {
- __le32 header;
+ u8 domain;
+ u8 opp_count;
+ __le16 latency;
struct {
__le32 freq;
__le32 m_volt;
@@ -667,8 +667,8 @@ static int scpi_dvfs_populate_info(struct device *dev, u8 domain)
if (!info)
return -ENOMEM;
- info->count = DVFS_OPP_COUNT(buf.header);
- info->latency = DVFS_LATENCY(buf.header) * 1000; /* uS to nS */
+ info->count = buf.opp_count;
+ info->latency = le16_to_cpu(buf.latency) * 1000; /* uS to nS */
info->opps = devm_kcalloc(dev, info->count, sizeof(*opp), GFP_KERNEL);
if (!info->opps)
@@ -721,9 +721,6 @@ static int scpi_dvfs_get_transition_latency(struct device *dev)
if (IS_ERR(info))
return PTR_ERR(info);
- if (!info->latency)
- return 0;
-
return info->latency;
}