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firmware: exynos-acpm: Count number of commands in acpm_xfer

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Struct acpm_xfer holds two buffers with u32 commands - rxd and txd - and
counts their size by rxlen and txlen.  "len" suffix is here ambiguous,
so could mean length of the buffer or length of commands, and these are
not the same since each command is u32.  Rename these to rxcnt and
txcnt, and change their usage to count the number of commands in each
buffer.

This will have a benefit of allowing to use __counted_by_ptr later.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://patch.msgid.link/20260219-firmare-acpm-counted-v2-2-e1f7389237d3@oss.qualcomm.com
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
This commit is contained in:
Krzysztof Kozlowski
2026-02-19 12:27:11 +01:00
committed by Krzysztof Kozlowski
parent 910e91a649
commit 00808ae2e6
4 changed files with 21 additions and 20 deletions
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9
drivers/firmware/samsung/exynos-acpm-dvfs.c
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@@ -5,6 +5,7 @@
* Copyright 2025 Linaro Ltd.
*/
#include <linux/array_size.h>
#include <linux/bitfield.h>
#include <linux/firmware/samsung/exynos-acpm-protocol.h>
#include <linux/ktime.h>
@@ -25,11 +26,11 @@ static void acpm_dvfs_set_xfer(struct acpm_xfer *xfer, u32 *cmd, size_t cmdlen,
{
xfer->acpm_chan_id = acpm_chan_id;
xfer->txd = cmd;
xfer->txlen = cmdlen;
xfer->txcnt = cmdlen;
if (response) {
xfer->rxd = cmd;
xfer->rxlen = cmdlen;
xfer->rxcnt = cmdlen;
}
}
@@ -50,7 +51,7 @@ int acpm_dvfs_set_rate(const struct acpm_handle *handle,
u32 cmd[4];
acpm_dvfs_init_set_rate_cmd(cmd, clk_id, rate);
acpm_dvfs_set_xfer(&xfer, cmd, sizeof(cmd), acpm_chan_id, false);
acpm_dvfs_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id, false);
return acpm_do_xfer(handle, &xfer);
}
@@ -70,7 +71,7 @@ unsigned long acpm_dvfs_get_rate(const struct acpm_handle *handle,
int ret;
acpm_dvfs_init_get_rate_cmd(cmd, clk_id);
acpm_dvfs_set_xfer(&xfer, cmd, sizeof(cmd), acpm_chan_id, true);
acpm_dvfs_set_xfer(&xfer, cmd, ARRAY_SIZE(cmd), acpm_chan_id, true);
ret = acpm_do_xfer(handle, &xfer);
if (ret)