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Tue, 12 Aug 2025 10:09:52 -0700 (PDT) Received: from [127.0.1.1] ([185.177.137.147]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-615a911451csm20060302a12.60.2025.08.12.10.09.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Aug 2025 10:09:51 -0700 (PDT) From: Yusuf Alper Bilgin Date: Tue, 12 Aug 2025 19:04:11 +0200 Subject: [PATCH 2/3] iio: adc: ltc2497: add support for LTC2495 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250812-ltc2495-v1-2-7bf4c6feec2e@gmail.com> References: <20250812-ltc2495-v1-0-7bf4c6feec2e@gmail.com> In-Reply-To: <20250812-ltc2495-v1-0-7bf4c6feec2e@gmail.com> To: Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , David Lechner , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Liam Beguin Cc: Michael Hennerich , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Yusuf Alper Bilgin X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1755018589; l=3693; i=y.alperbilgin@gmail.com; s=20250811; h=from:subject:message-id; bh=IqcVlKobCq588xENs4uppJQybncqhnqWvF/okPMFi9Q=; b=KIX6i3ugIuT8joLUld2oEZkkMM9KrjCJWhezNctQLLeR2KHki4TtxAOef/tBch6Cu+9utw+mh NFiarAIBkNQAeknK+jXobaGm3qXIBGlbnKv5+nHmTWv8YDPSKbEYgJY X-Developer-Key: i=y.alperbilgin@gmail.com; a=ed25519; pk=FtW2oyQ0+xlYU0XmhYiJYC3lNPtPrgeE6i4WXPwaFnY= This updates the LTC2497 driver to also support the LTC2495. Signed-off-by: Yusuf Alper Bilgin --- drivers/iio/adc/ltc2497-core.c | 20 +++++++++----------- drivers/iio/adc/ltc2497.c | 7 +++++++ drivers/iio/adc/ltc2497.h | 4 +--- 3 files changed, 17 insertions(+), 14 deletions(-) diff --git a/drivers/iio/adc/ltc2497-core.c b/drivers/iio/adc/ltc2497-core.c index 2dc5c704426949a4ec62c42591d6c2c40ffb79cc..400f4fe5af30e8e16b75506726235f10f2a4237f 100644 --- a/drivers/iio/adc/ltc2497-core.c +++ b/drivers/iio/adc/ltc2497-core.c @@ -15,9 +15,12 @@ #include "ltc2497.h" -#define LTC2497_SGL BIT(4) -#define LTC2497_DIFF 0 -#define LTC2497_SIGN BIT(3) +#define LTC2497_CONFIG_DEFAULT LTC2497_ENABLE +#define LTC2497_CONVERSION_TIME_MS 150ULL + +#define LTC2497_SGL BIT(4) +#define LTC2497_DIFF 0 +#define LTC2497_SIGN BIT(3) static int ltc2497core_wait_conv(struct ltc2497core_driverdata *ddata) { @@ -26,20 +29,15 @@ static int ltc2497core_wait_conv(struct ltc2497core_driverdata *ddata) time_elapsed = ktime_ms_delta(ktime_get(), ddata->time_prev); if (time_elapsed < LTC2497_CONVERSION_TIME_MS) { - /* delay if conversion time not passed - * since last read or write - */ - if (msleep_interruptible( - LTC2497_CONVERSION_TIME_MS - time_elapsed)) + /* delay if conversion time not passed since last read or write */ + if (msleep_interruptible(LTC2497_CONVERSION_TIME_MS - time_elapsed)) return -ERESTARTSYS; return 0; } if (time_elapsed - LTC2497_CONVERSION_TIME_MS <= 0) { - /* We're in automatic mode - - * so the last reading is still not outdated - */ + /* We're in automatic mode - so the last reading is still not outdated */ return 0; } diff --git a/drivers/iio/adc/ltc2497.c b/drivers/iio/adc/ltc2497.c index eb9d521e86e54def0493ea0e81f63b37900c56a5..8f4665547b5b0d32084599f8557c40102c37a4ce 100644 --- a/drivers/iio/adc/ltc2497.c +++ b/drivers/iio/adc/ltc2497.c @@ -19,6 +19,7 @@ #include "ltc2497.h" enum ltc2497_chip_type { + TYPE_LTC2495, TYPE_LTC2497, TYPE_LTC2499, }; @@ -131,6 +132,10 @@ static void ltc2497_remove(struct i2c_client *client) } static const struct ltc2497_chip_info ltc2497_info[] = { + [TYPE_LTC2495] = { + .resolution = 16, + .name = "ltc2495", + }, [TYPE_LTC2497] = { .resolution = 16, .name = NULL, @@ -142,6 +147,7 @@ static const struct ltc2497_chip_info ltc2497_info[] = { }; static const struct i2c_device_id ltc2497_id[] = { + { "ltc2495", (kernel_ulong_t)<c2497_info[TYPE_LTC2495] }, { "ltc2497", (kernel_ulong_t)<c2497_info[TYPE_LTC2497] }, { "ltc2499", (kernel_ulong_t)<c2497_info[TYPE_LTC2499] }, { } @@ -149,6 +155,7 @@ static const struct i2c_device_id ltc2497_id[] = { MODULE_DEVICE_TABLE(i2c, ltc2497_id); static const struct of_device_id ltc2497_of_match[] = { + { .compatible = "lltc,ltc2495", .data = <c2497_info[TYPE_LTC2495] }, { .compatible = "lltc,ltc2497", .data = <c2497_info[TYPE_LTC2497] }, { .compatible = "lltc,ltc2499", .data = <c2497_info[TYPE_LTC2499] }, { } diff --git a/drivers/iio/adc/ltc2497.h b/drivers/iio/adc/ltc2497.h index 64e81c95a3dd05911b6717c09ac0560c9f47f304..f2139f260c3fe4e8772c6db9c46331de775dcd5c 100644 --- a/drivers/iio/adc/ltc2497.h +++ b/drivers/iio/adc/ltc2497.h @@ -1,8 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0-only */ -#define LTC2497_ENABLE 0xA0 -#define LTC2497_CONFIG_DEFAULT LTC2497_ENABLE -#define LTC2497_CONVERSION_TIME_MS 150ULL +#define LTC2497_ENABLE 0xA0 struct ltc2497_chip_info { u32 resolution; -- 2.43.0