From: Dmitry Guzman <Dmitry.Guzman@mobileye.com>
To: Andi Shyti <andi.shyti@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Linus Walleij <linusw@kernel.org>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-trace-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
"Benoît Monin" <benoit.monin@bootlin.com>,
"Dmitry Guzman" <Dmitry.Guzman@mobileye.com>
Subject: [PATCH v2 02/12] i2c: nomadik: optimize struct layout, change unsigned char into u8
Date: Thu, 03 Sep 2026 08:38:09 +0300 [thread overview]
Message-ID: <20260903-i2c-fault-reporting-v2-2-fedeb91792e6@mobileye.com> (raw)
In-Reply-To: <20260903-i2c-fault-reporting-v2-0-fedeb91792e6@mobileye.com>
Change type of `tft` and `rft` fields of `nmk_i2c_dev` structure from
`unsigned char` to `u8` and `buffer` field of `i2c_nmk_client` structure
from `unsigned char *` to `u8 *`.
Put two bool variables `xfer_done` and `has_32b_bus` and two u8 variables
`tft` and `rft` together in order to reduce struct size wasted for padding.
Signed-off-by: Dmitry Guzman <Dmitry.Guzman@mobileye.com>
---
drivers/i2c/busses/i2c-nomadik.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
index c3878670da9cfa462b66919ddc58b55cc78db6e5..45b4815b094524d9a8de69376e2933171541611a 100644
--- a/drivers/i2c/busses/i2c-nomadik.c
+++ b/drivers/i2c/busses/i2c-nomadik.c
@@ -170,7 +170,7 @@ enum i2c_operating_mode {
struct i2c_nmk_client {
unsigned short slave_adr;
unsigned long count;
- unsigned char *buffer;
+ u8 *buffer;
unsigned long xfer_bytes;
enum i2c_operation operation;
};
@@ -187,13 +187,13 @@ struct i2c_nmk_client {
* @clk_freq: clock frequency for the operation mode
* @tft: Tx FIFO Threshold in bytes
* @rft: Rx FIFO Threshold in bytes
+ * @xfer_done: xfer done boolean.
+ * @has_32b_bus: controller is on a bus that only supports 32-bit accesses.
* @timeout_usecs: Slave response timeout
* @sm: speed mode
* @stop: stop condition.
* @xfer_wq: xfer done wait queue.
- * @xfer_done: xfer done boolean.
* @result: controller propogated result.
- * @has_32b_bus: controller is on a bus that only supports 32-bit accesses.
*/
struct nmk_i2c_dev {
struct i2c_vendor_data *vendor;
@@ -204,15 +204,15 @@ struct nmk_i2c_dev {
struct clk *clk;
struct i2c_nmk_client cli;
u32 clk_freq;
- unsigned char tft;
- unsigned char rft;
+ u8 tft;
+ u8 rft;
+ bool xfer_done;
+ bool has_32b_bus;
u32 timeout_usecs;
enum i2c_freq_mode sm;
int stop;
struct wait_queue_head xfer_wq;
- bool xfer_done;
int result;
- bool has_32b_bus;
};
/* controller's abort causes */
--
2.43.0
next prev parent reply other threads:[~2026-09-03 5:39 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-03 5:38 [PATCH v2 00/12] I2C - detailed transfer reporting in case of a fault Dmitry Guzman
2026-09-03 5:38 ` [PATCH v2 01/12] i2c: core: add I2C_XFER_V2 - support for detailed transfer reporting Dmitry Guzman
2026-09-03 7:21 ` Andy Shevchenko
2026-09-03 5:38 ` Dmitry Guzman [this message]
2026-09-03 5:38 ` [PATCH v2 03/12] i2c: nomadik: do not try to retransmit I2C message series on errors Dmitry Guzman
2026-09-03 5:38 ` [PATCH v2 04/12] i2c: nomadik: return proper fault codes Dmitry Guzman
2026-09-03 5:38 ` [PATCH v2 05/12] i2c: nomadik: change print level for fault messages to debug Dmitry Guzman
2026-09-03 5:38 ` [PATCH v2 06/12] i2c: nomadik: add quirks max_len=2047 and no_zero_len_read Dmitry Guzman
2026-09-03 5:38 ` [PATCH v2 07/12] i2c: nomadik: add support for I2C_XFER_V2 - detailed fault reporting Dmitry Guzman
2026-09-03 5:38 ` [PATCH v2 08/12] i2c: designware: return proper fault codes Dmitry Guzman
2026-09-03 5:38 ` [PATCH v2 09/12] i2c: designware: no SMBUS_READ_BLOCK_DATA without EMPTYFIFO_HOLD_MASTER Dmitry Guzman
2026-09-03 7:39 ` Andy Shevchenko
2026-09-03 5:38 ` [PATCH v2 10/12] i2c: designware: stop transfer if spurious STOP is detected Dmitry Guzman
2026-09-03 5:38 ` [PATCH v2 11/12] i2c: designware: use separate `i2c_algorithm` for AMD_NAVI_GPU Dmitry Guzman
2026-09-03 5:38 ` [PATCH v2 12/12] i2c: designware: add support for I2C_XFER_V2 - detailed fault reporting Dmitry Guzman
2026-09-03 7:47 ` Andy Shevchenko
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