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c36de2e73a
Backport almost 50 commits from upstream Linux to improve thermal drivers for MediaTek SoCs and add new LVTS driver for MT7988. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
121 lines
4.4 KiB
Diff
121 lines
4.4 KiB
Diff
From 6d827142643ee10c13ff9a1d90f38fb399aa9fff Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?N=C3=ADcolas=20F=2E=20R=2E=20A=2E=20Prado?=
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<nfraprado@collabora.com>
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Date: Thu, 6 Jul 2023 11:37:33 -0400
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Subject: [PATCH 26/42] thermal/drivers/mediatek/lvts_thermal: Honor sensors in
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immediate mode
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Each controller can be configured to operate on immediate or filtered
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mode. On filtered mode, the sensors are enabled by setting the
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corresponding bits in MONCTL0, while on immediate mode, by setting
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MSRCTL1.
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Previously, the code would set MSRCTL1 for all four sensors when
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configured to immediate mode, but given that the controller might not
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have all four sensors connected, this would cause interrupts to trigger
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for non-existent sensors. Fix this by handling the MSRCTL1 register
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analogously to the MONCTL0: only enable the sensors that were declared.
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Fixes: f5f633b18234 ("thermal/drivers/mediatek: Add the Low Voltage Thermal Sensor driver")
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Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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Tested-by: Chen-Yu Tsai <wenst@chromium.org>
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Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
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Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
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Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Link: https://lore.kernel.org/r/20230706153823.201943-3-nfraprado@collabora.com
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---
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drivers/thermal/mediatek/lvts_thermal.c | 57 ++++++++++++++-----------
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1 file changed, 33 insertions(+), 24 deletions(-)
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--- a/drivers/thermal/mediatek/lvts_thermal.c
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+++ b/drivers/thermal/mediatek/lvts_thermal.c
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@@ -897,24 +897,6 @@ static int lvts_ctrl_configure(struct de
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writel(value, LVTS_MSRCTL0(lvts_ctrl->base));
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/*
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- * LVTS_MSRCTL1 : Measurement control
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- *
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- * Bits:
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- *
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- * 9: Ignore MSRCTL0 config and do immediate measurement on sensor3
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- * 6: Ignore MSRCTL0 config and do immediate measurement on sensor2
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- * 5: Ignore MSRCTL0 config and do immediate measurement on sensor1
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- * 4: Ignore MSRCTL0 config and do immediate measurement on sensor0
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- *
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- * That configuration will ignore the filtering and the delays
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- * introduced below in MONCTL1 and MONCTL2
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- */
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- if (lvts_ctrl->mode == LVTS_MSR_IMMEDIATE_MODE) {
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- value = BIT(9) | BIT(6) | BIT(5) | BIT(4);
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- writel(value, LVTS_MSRCTL1(lvts_ctrl->base));
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- }
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-
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- /*
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* LVTS_MONCTL1 : Period unit and group interval configuration
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*
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* The clock source of LVTS thermal controller is 26MHz.
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@@ -979,6 +961,15 @@ static int lvts_ctrl_start(struct device
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struct thermal_zone_device *tz;
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u32 sensor_map = 0;
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int i;
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+ /*
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+ * Bitmaps to enable each sensor on immediate and filtered modes, as
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+ * described in MSRCTL1 and MONCTL0 registers below, respectively.
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+ */
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+ u32 sensor_imm_bitmap[] = { BIT(4), BIT(5), BIT(6), BIT(9) };
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+ u32 sensor_filt_bitmap[] = { BIT(0), BIT(1), BIT(2), BIT(3) };
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+
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+ u32 *sensor_bitmap = lvts_ctrl->mode == LVTS_MSR_IMMEDIATE_MODE ?
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+ sensor_imm_bitmap : sensor_filt_bitmap;
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for (i = 0; i < lvts_ctrl->num_lvts_sensor; i++) {
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@@ -1016,20 +1007,38 @@ static int lvts_ctrl_start(struct device
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* map, so we can enable the temperature monitoring in
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* the hardware thermal controller.
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*/
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- sensor_map |= BIT(i);
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+ sensor_map |= sensor_bitmap[i];
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}
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/*
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- * Bits:
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- * 9: Single point access flow
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- * 0-3: Enable sensing point 0-3
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- *
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* The initialization of the thermal zones give us
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* which sensor point to enable. If any thermal zone
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* was not described in the device tree, it won't be
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* enabled here in the sensor map.
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*/
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- writel(sensor_map | BIT(9), LVTS_MONCTL0(lvts_ctrl->base));
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+ if (lvts_ctrl->mode == LVTS_MSR_IMMEDIATE_MODE) {
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+ /*
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+ * LVTS_MSRCTL1 : Measurement control
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+ *
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+ * Bits:
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+ *
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+ * 9: Ignore MSRCTL0 config and do immediate measurement on sensor3
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+ * 6: Ignore MSRCTL0 config and do immediate measurement on sensor2
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+ * 5: Ignore MSRCTL0 config and do immediate measurement on sensor1
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+ * 4: Ignore MSRCTL0 config and do immediate measurement on sensor0
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+ *
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+ * That configuration will ignore the filtering and the delays
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+ * introduced in MONCTL1 and MONCTL2
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+ */
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+ writel(sensor_map, LVTS_MSRCTL1(lvts_ctrl->base));
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+ } else {
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+ /*
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+ * Bits:
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+ * 9: Single point access flow
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+ * 0-3: Enable sensing point 0-3
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+ */
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+ writel(sensor_map | BIT(9), LVTS_MONCTL0(lvts_ctrl->base));
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+ }
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return 0;
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}
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