From: Tudor Ambarus <tudor.ambarus@linaro.org>
To: "Rafael J. Wysocki" <rafael@kernel.org>,
"Zhang Rui" <rui.zhang@intel.com>,
"Lukasz Luba" <lukasz.luba@arm.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Krzysztof Kozlowski" <krzk@kernel.org>,
"Alim Akhtar" <alim.akhtar@samsung.com>,
"Bartlomiej Zolnierkiewicz" <bzolnier@gmail.com>,
"Kees Cook" <kees@kernel.org>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
"Peter Griffin" <peter.griffin@linaro.org>,
"André Draszik" <andre.draszik@linaro.org>,
"Daniel Lezcano" <daniel.lezcano@kernel.org>,
"Sylwester Nawrocki" <s.nawrocki@samsung.com>,
"Chanwoo Choi" <cw00.choi@samsung.com>,
"Michael Turquette" <mturquette@baylibre.com>,
"Stephen Boyd" <sboyd@kernel.org>, "Lee Jones" <lee@kernel.org>
Cc: willmcvicker@google.com, jyescas@google.com,
shin.son@samsung.com, linux-samsung-soc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-hardening@vger.kernel.org, linux-clk@vger.kernel.org,
Tudor Ambarus <tudor.ambarus@linaro.org>
Subject: [PATCH v4 02/11] firmware: samsung: acpm: Consolidate transfer initialization helper
Date: Thu, 23 Apr 2026 15:22:50 +0000 [thread overview]
Message-ID: <20260423-acpm-tmu-v4-2-8b59f8548634@linaro.org> (raw)
In-Reply-To: <20260423-acpm-tmu-v4-0-8b59f8548634@linaro.org>
Both the DVFS and PMIC ACPM sub-drivers implement their own identical
local helper functions (acpm_dvfs_set_xfer and acpm_pmic_set_xfer) to
initialize the acpm_xfer structure before sending an IPC message.
Move this logic into a single centralized helper, acpm_set_xfer(),
in the core ACPM driver to reduce boilerplate and code duplication.
In addition to cleaning up the DVFS and PMIC implementations, this
centralized method will also be utilized by the upcoming Exynos ACPM
Thermal Management Unit (TMU) driver.
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
---
drivers/firmware/samsung/exynos-acpm-dvfs.c | 20 ++------------------
drivers/firmware/samsung/exynos-acpm-pmic.c | 20 +++++---------------
drivers/firmware/samsung/exynos-acpm.c | 26 ++++++++++++++++++++++++++
drivers/firmware/samsung/exynos-acpm.h | 2 ++
4 files changed, 35 insertions(+), 33 deletions(-)
diff --git a/drivers/firmware/samsung/exynos-acpm-dvfs.c b/drivers/firmware/samsung/exynos-acpm-dvfs.c
index fdea7aa24ca0..7266312ef5a6 100644
--- a/drivers/firmware/samsung/exynos-acpm-dvfs.c
+++ b/drivers/firmware/samsung/exynos-acpm-dvfs.c
@@ -21,22 +21,6 @@
#define ACPM_DVFS_FREQ_REQ 0
#define ACPM_DVFS_FREQ_GET 1
-static void acpm_dvfs_set_xfer(struct acpm_xfer *xfer, u32 *cmd, size_t cmdlen,
- unsigned int acpm_chan_id, bool response)
-{
- xfer->acpm_chan_id = acpm_chan_id;
- xfer->txcnt = cmdlen;
- xfer->txd = cmd;
-
- if (response) {
- xfer->rxcnt = cmdlen;
- xfer->rxd = cmd;
- } else {
- xfer->rxcnt = 0;
- xfer->rxd = NULL;
- }
-}
-
static void acpm_dvfs_init_set_rate_cmd(u32 cmd[4], unsigned int clk_id,
unsigned long rate)
{
@@ -54,7 +38,7 @@ int acpm_dvfs_set_rate(struct acpm_handle *handle,
u32 cmd[4];
acpm_dvfs_init_set_rate_cmd(cmd, clk_id, rate);
- acpm_dvfs_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id, false);
+ acpm_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id, false);
return acpm_do_xfer(handle, &xfer);
}
@@ -74,7 +58,7 @@ unsigned long acpm_dvfs_get_rate(struct acpm_handle *handle,
int ret;
acpm_dvfs_init_get_rate_cmd(cmd, clk_id);
- acpm_dvfs_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id, true);
+ acpm_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id, true);
ret = acpm_do_xfer(handle, &xfer);
if (ret)
diff --git a/drivers/firmware/samsung/exynos-acpm-pmic.c b/drivers/firmware/samsung/exynos-acpm-pmic.c
index 0c50993cc9a8..f032f2c69685 100644
--- a/drivers/firmware/samsung/exynos-acpm-pmic.c
+++ b/drivers/firmware/samsung/exynos-acpm-pmic.c
@@ -58,16 +58,6 @@ static inline u32 acpm_pmic_get_bulk(u32 data, unsigned int i)
return (data >> (ACPM_PMIC_BULK_SHIFT * i)) & ACPM_PMIC_BULK_MASK;
}
-static void acpm_pmic_set_xfer(struct acpm_xfer *xfer, u32 *cmd, size_t cmdlen,
- unsigned int acpm_chan_id)
-{
- xfer->txd = cmd;
- xfer->rxd = cmd;
- xfer->txcnt = cmdlen;
- xfer->rxcnt = cmdlen;
- xfer->acpm_chan_id = acpm_chan_id;
-}
-
static void acpm_pmic_init_read_cmd(u32 cmd[4], u8 type, u8 reg, u8 chan)
{
cmd[0] = FIELD_PREP(ACPM_PMIC_TYPE, type) |
@@ -86,7 +76,7 @@ int acpm_pmic_read_reg(struct acpm_handle *handle,
int ret;
acpm_pmic_init_read_cmd(cmd, type, reg, chan);
- acpm_pmic_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id);
+ acpm_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id, true);
ret = acpm_do_xfer(handle, &xfer);
if (ret)
@@ -119,7 +109,7 @@ int acpm_pmic_bulk_read(struct acpm_handle *handle,
return -EINVAL;
acpm_pmic_init_bulk_read_cmd(cmd, type, reg, chan, count);
- acpm_pmic_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id);
+ acpm_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id, true);
ret = acpm_do_xfer(handle, &xfer);
if (ret)
@@ -159,7 +149,7 @@ int acpm_pmic_write_reg(struct acpm_handle *handle,
int ret;
acpm_pmic_init_write_cmd(cmd, type, reg, chan, value);
- acpm_pmic_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id);
+ acpm_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id, true);
ret = acpm_do_xfer(handle, &xfer);
if (ret)
@@ -199,7 +189,7 @@ int acpm_pmic_bulk_write(struct acpm_handle *handle,
return -EINVAL;
acpm_pmic_init_bulk_write_cmd(cmd, type, reg, chan, count, buf);
- acpm_pmic_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id);
+ acpm_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id, true);
ret = acpm_do_xfer(handle, &xfer);
if (ret)
@@ -229,7 +219,7 @@ int acpm_pmic_update_reg(struct acpm_handle *handle,
int ret;
acpm_pmic_init_update_cmd(cmd, type, reg, chan, value, mask);
- acpm_pmic_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id);
+ acpm_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id, true);
ret = acpm_do_xfer(handle, &xfer);
if (ret)
diff --git a/drivers/firmware/samsung/exynos-acpm.c b/drivers/firmware/samsung/exynos-acpm.c
index 896fbdc2700e..c4aca61a63e4 100644
--- a/drivers/firmware/samsung/exynos-acpm.c
+++ b/drivers/firmware/samsung/exynos-acpm.c
@@ -470,6 +470,32 @@ int acpm_do_xfer(struct acpm_handle *handle, const struct acpm_xfer *xfer)
return acpm_wait_for_message_response(achan, xfer);
}
+/**
+ * acpm_set_xfer() - initialize an ACPM IPC transfer structure.
+ * @xfer: pointer to the ACPM transfer structure that is being initialized.
+ * @cmd: pointer to the buffer containing the command to be transmitted
+ * to the ACPM firmware.
+ * @cmdcnt: length of the command in 32-bit words.
+ * @acpm_chan_id: mailbox channel identifier.
+ * @response: boolean flag indicating whether the kernel expects the ACPM
+ * firmware to send a reply to this specific command.
+ */
+static void acpm_set_xfer(struct acpm_xfer *xfer, u32 *cmd, size_t cmdcnt,
+ unsigned int acpm_chan_id, bool response)
+{
+ xfer->acpm_chan_id = acpm_chan_id;
+ xfer->txcnt = cmdcnt;
+ xfer->txd = cmd;
+
+ if (response) {
+ xfer->rxcnt = cmdcnt;
+ xfer->rxd = cmd;
+ } else {
+ xfer->rxcnt = 0;
+ xfer->rxd = NULL;
+ }
+}
+
/**
* acpm_chan_shmem_get_params() - get channel parameters and addresses of the
* TX/RX queues.
diff --git a/drivers/firmware/samsung/exynos-acpm.h b/drivers/firmware/samsung/exynos-acpm.h
index 5df8354dc96c..708f6b0102ac 100644
--- a/drivers/firmware/samsung/exynos-acpm.h
+++ b/drivers/firmware/samsung/exynos-acpm.h
@@ -17,6 +17,8 @@ struct acpm_xfer {
struct acpm_handle;
+void acpm_set_xfer(struct acpm_xfer *xfer, u32 *cmd, size_t cmdcnt,
+ unsigned int acpm_chan_id, bool response);
int acpm_do_xfer(struct acpm_handle *handle,
const struct acpm_xfer *xfer);
--
2.54.0.545.g6539524ca2-goog
next prev parent reply other threads:[~2026-04-23 15:23 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-23 15:22 [PATCH v4 00/11] thermal: samsung: Add support for Google GS101 TMU Tudor Ambarus
2026-04-23 15:22 ` [PATCH v4 01/11] dt-bindings: thermal: Add " Tudor Ambarus
2026-04-23 15:22 ` Tudor Ambarus [this message]
2026-04-28 9:25 ` [PATCH v4 02/11] firmware: samsung: acpm: Consolidate transfer initialization helper Krzysztof Kozlowski
2026-04-29 17:02 ` Tudor Ambarus
2026-04-23 15:22 ` [PATCH v4 03/11] firmware: samsung: acpm: Annotate rx_data->cmd with __counted_by_ptr Tudor Ambarus
2026-04-23 15:22 ` [PATCH v4 04/11] firmware: samsung: acpm: Drop redundant _ops suffix in acpm_ops members Tudor Ambarus
2026-04-23 15:22 ` [PATCH v4 05/11] firmware: samsung: acpm: Make acpm_ops const and access via pointer Tudor Ambarus
2026-04-23 15:22 ` [PATCH v4 06/11] firmware: samsung: acpm: Add TMU protocol support Tudor Ambarus
2026-04-23 15:22 ` [PATCH v4 07/11] firmware: samsung: acpm: Add devm_acpm_get_by_phandle helper Tudor Ambarus
2026-04-23 15:22 ` [PATCH v4 08/11] thermal: samsung: Add Exynos ACPM TMU driver GS101 Tudor Ambarus
2026-04-30 13:07 ` Alexey Klimov
2026-04-30 13:40 ` Tudor Ambarus
2026-04-23 15:22 ` [PATCH v4 09/11] MAINTAINERS: Add entry for Samsung Exynos ACPM thermal driver Tudor Ambarus
2026-04-23 15:22 ` [PATCH v4 10/11] arm64: dts: exynos: gs101: Add thermal management unit Tudor Ambarus
2026-04-23 15:22 ` [PATCH v4 11/11] arm64: defconfig: enable Exynos ACPM thermal support Tudor Ambarus
2026-04-28 9:24 ` [PATCH v4 00/11] thermal: samsung: Add support for Google GS101 TMU Krzysztof Kozlowski
2026-04-29 15:20 ` Tudor Ambarus
2026-05-01 13:13 ` Alexey Klimov
2026-05-01 14:33 ` Tudor Ambarus
2026-05-01 15:32 ` Alexey Klimov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260423-acpm-tmu-v4-2-8b59f8548634@linaro.org \
--to=tudor.ambarus@linaro.org \
--cc=alim.akhtar@samsung.com \
--cc=andre.draszik@linaro.org \
--cc=bzolnier@gmail.com \
--cc=conor+dt@kernel.org \
--cc=cw00.choi@samsung.com \
--cc=daniel.lezcano@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=gustavoars@kernel.org \
--cc=jyescas@google.com \
--cc=kees@kernel.org \
--cc=krzk+dt@kernel.org \
--cc=krzk@kernel.org \
--cc=lee@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-clk@vger.kernel.org \
--cc=linux-hardening@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=linux-samsung-soc@vger.kernel.org \
--cc=lukasz.luba@arm.com \
--cc=mturquette@baylibre.com \
--cc=peter.griffin@linaro.org \
--cc=rafael@kernel.org \
--cc=robh@kernel.org \
--cc=rui.zhang@intel.com \
--cc=s.nawrocki@samsung.com \
--cc=sboyd@kernel.org \
--cc=shin.son@samsung.com \
--cc=willmcvicker@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox