Instead of type-casting the {tx,rx}.buf all over the place while accessing them to read/write __le{32,64} from/to the firmware, let's use the existing {get,put}_unaligned_le{32,64} accessors to hide all the type cast ugliness.
Suggested-by: Philipp Zabel <p.za...@pengutronix.de> Signed-off-by: Sudeep Holla <sudeep.ho...@arm.com> --- drivers/firmware/arm_scmi/base.c | 2 +- drivers/firmware/arm_scmi/clock.c | 12 ++++-------- drivers/firmware/arm_scmi/common.h | 2 ++ drivers/firmware/arm_scmi/perf.c | 8 ++++---- drivers/firmware/arm_scmi/power.c | 6 +++--- drivers/firmware/arm_scmi/reset.c | 2 +- drivers/firmware/arm_scmi/sensors.c | 17 ++++++----------- 7 files changed, 21 insertions(+), 28 deletions(-) v1->v2: - Dropped incorrect void ptr arithmetic and used unaligned_le64 accessors instead diff --git a/drivers/firmware/arm_scmi/base.c b/drivers/firmware/arm_scmi/base.c index 204390297f4b..f804e8af6521 100644 --- a/drivers/firmware/arm_scmi/base.c +++ b/drivers/firmware/arm_scmi/base.c @@ -204,7 +204,7 @@ static int scmi_base_discover_agent_get(const struct scmi_handle *handle, if (ret) return ret; - *(__le32 *)t->tx.buf = cpu_to_le32(id); + put_unaligned_le32(id, t->tx.buf); ret = scmi_do_xfer(handle, t); if (!ret) diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c index 4a32ae1822a3..32526a793f3a 100644 --- a/drivers/firmware/arm_scmi/clock.c +++ b/drivers/firmware/arm_scmi/clock.c @@ -107,7 +107,7 @@ static int scmi_clock_attributes_get(const struct scmi_handle *handle, if (ret) return ret; - *(__le32 *)t->tx.buf = cpu_to_le32(clk_id); + put_unaligned_le32(clk_id, t->tx.buf); attr = t->rx.buf; ret = scmi_do_xfer(handle, t); @@ -204,15 +204,11 @@ scmi_clock_rate_get(const struct scmi_handle *handle, u32 clk_id, u64 *value) if (ret) return ret; - *(__le32 *)t->tx.buf = cpu_to_le32(clk_id); + put_unaligned_le32(clk_id, t->tx.buf); ret = scmi_do_xfer(handle, t); - if (!ret) { - __le32 *pval = t->rx.buf; - - *value = le32_to_cpu(*pval); - *value |= (u64)le32_to_cpu(*(pval + 1)) << 32; - } + if (!ret) + *value = get_unaligned_le64(t->rx.buf); scmi_xfer_put(handle, t); return ret; diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h index 43884e4ceac5..5237c2ff79fe 100644 --- a/drivers/firmware/arm_scmi/common.h +++ b/drivers/firmware/arm_scmi/common.h @@ -15,6 +15,8 @@ #include <linux/scmi_protocol.h> #include <linux/types.h> +#include <asm/unaligned.h> + #define PROTOCOL_REV_MINOR_MASK GENMASK(15, 0) #define PROTOCOL_REV_MAJOR_MASK GENMASK(31, 16) #define PROTOCOL_REV_MAJOR(x) (u16)(FIELD_GET(PROTOCOL_REV_MAJOR_MASK, (x))) diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c index fb7f6cab2c11..9b338e66a24e 100644 --- a/drivers/firmware/arm_scmi/perf.c +++ b/drivers/firmware/arm_scmi/perf.c @@ -195,7 +195,7 @@ scmi_perf_domain_attributes_get(const struct scmi_handle *handle, u32 domain, if (ret) return ret; - *(__le32 *)t->tx.buf = cpu_to_le32(domain); + put_unaligned_le32(domain, t->tx.buf); attr = t->rx.buf; ret = scmi_do_xfer(handle, t); @@ -380,7 +380,7 @@ static int scmi_perf_mb_limits_get(const struct scmi_handle *handle, u32 domain, if (ret) return ret; - *(__le32 *)t->tx.buf = cpu_to_le32(domain); + put_unaligned_le32(domain, t->tx.buf); ret = scmi_do_xfer(handle, t); if (!ret) { @@ -459,11 +459,11 @@ static int scmi_perf_mb_level_get(const struct scmi_handle *handle, u32 domain, return ret; t->hdr.poll_completion = poll; - *(__le32 *)t->tx.buf = cpu_to_le32(domain); + put_unaligned_le32(domain, t->tx.buf); ret = scmi_do_xfer(handle, t); if (!ret) - *level = le32_to_cpu(*(__le32 *)t->rx.buf); + *level = get_unaligned_le32(t->rx.buf); scmi_xfer_put(handle, t); return ret; diff --git a/drivers/firmware/arm_scmi/power.c b/drivers/firmware/arm_scmi/power.c index 62f3401a1f01..5abef7079c0a 100644 --- a/drivers/firmware/arm_scmi/power.c +++ b/drivers/firmware/arm_scmi/power.c @@ -96,7 +96,7 @@ scmi_power_domain_attributes_get(const struct scmi_handle *handle, u32 domain, if (ret) return ret; - *(__le32 *)t->tx.buf = cpu_to_le32(domain); + put_unaligned_le32(domain, t->tx.buf); attr = t->rx.buf; ret = scmi_do_xfer(handle, t); @@ -147,11 +147,11 @@ scmi_power_state_get(const struct scmi_handle *handle, u32 domain, u32 *state) if (ret) return ret; - *(__le32 *)t->tx.buf = cpu_to_le32(domain); + put_unaligned_le32(domain, t->tx.buf); ret = scmi_do_xfer(handle, t); if (!ret) - *state = le32_to_cpu(*(__le32 *)t->rx.buf); + *state = get_unaligned_le32(t->rx.buf); scmi_xfer_put(handle, t); return ret; diff --git a/drivers/firmware/arm_scmi/reset.c b/drivers/firmware/arm_scmi/reset.c index 11cb8b5ccf34..c1d67a2af12f 100644 --- a/drivers/firmware/arm_scmi/reset.c +++ b/drivers/firmware/arm_scmi/reset.c @@ -88,7 +88,7 @@ scmi_reset_domain_attributes_get(const struct scmi_handle *handle, u32 domain, if (ret) return ret; - *(__le32 *)t->tx.buf = cpu_to_le32(domain); + put_unaligned_le32(domain, t->tx.buf); attr = t->rx.buf; ret = scmi_do_xfer(handle, t); diff --git a/drivers/firmware/arm_scmi/sensors.c b/drivers/firmware/arm_scmi/sensors.c index 7570308a16a0..a400ea805fc2 100644 --- a/drivers/firmware/arm_scmi/sensors.c +++ b/drivers/firmware/arm_scmi/sensors.c @@ -120,7 +120,7 @@ static int scmi_sensor_description_get(const struct scmi_handle *handle, do { /* Set the number of sensors to be skipped/already read */ - *(__le32 *)t->tx.buf = cpu_to_le32(desc_index); + put_unaligned_le32(desc_index, t->tx.buf); ret = scmi_do_xfer(handle, t); if (ret) @@ -217,7 +217,6 @@ static int scmi_sensor_reading_get(const struct scmi_handle *handle, u32 sensor_id, u64 *value) { int ret; - __le32 *pval; struct scmi_xfer *t; struct scmi_msg_sensor_reading_get *sensor; struct sensors_info *si = handle->sensor_priv; @@ -229,24 +228,20 @@ static int scmi_sensor_reading_get(const struct scmi_handle *handle, if (ret) return ret; - pval = t->rx.buf; sensor = t->tx.buf; sensor->id = cpu_to_le32(sensor_id); if (s->async) { sensor->flags = cpu_to_le32(SENSOR_READ_ASYNC); ret = scmi_do_xfer_with_response(handle, t); - if (!ret) { - *value = le32_to_cpu(*(pval + 1)); - *value |= (u64)le32_to_cpu(*(pval + 2)) << 32; - } + if (!ret) + *value = get_unaligned_le64((void *) + ((__le32 *)t->rx.buf + 1)); } else { sensor->flags = cpu_to_le32(0); ret = scmi_do_xfer(handle, t); - if (!ret) { - *value = le32_to_cpu(*pval); - *value |= (u64)le32_to_cpu(*(pval + 1)) << 32; - } + if (!ret) + *value = get_unaligned_le64(t->rx.buf); } scmi_xfer_put(handle, t); -- 2.17.1