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authorEzequiel Garcia <ezequiel.garcia@free-electrons.com>2014-05-06 13:59:50 -0300
committerZhang Rui <rui.zhang@intel.com>2014-05-15 17:12:49 +0800
commite2d5f05b745d19bc889c79977325b14853f3fc38 (patch)
tree1d21e3707e0ffb7ca0ac13ad48b8af19203dfae2 /drivers/thermal/armada_thermal.c
parentfd2c94d5a32297c63b025b54b71aa24ccc0596ed (diff)
downloadblackbird-op-linux-e2d5f05b745d19bc889c79977325b14853f3fc38.tar.gz
blackbird-op-linux-e2d5f05b745d19bc889c79977325b14853f3fc38.zip
thermal: armada: Support Armada 375 SoC
Now that a generic infrastructure is in place, it's possible to support the new Armada 375 SoC thermal sensor. This sensor is similar to the one available in the already supported SoCs, with its specific temperature formula and specific sensor initialization. In addition, we also add support for the Z1 SoC stepping, which needs an initialization-quirk to work properly. Acked-by: Jason Cooper <jason@lakedaemon.net> Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Diffstat (limited to 'drivers/thermal/armada_thermal.c')
-rw-r--r--drivers/thermal/armada_thermal.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c
index f84d9f077fe2..e65c5e442ed5 100644
--- a/drivers/thermal/armada_thermal.c
+++ b/drivers/thermal/armada_thermal.c
@@ -35,6 +35,15 @@
#define PMU_TDC0_OTF_CAL_MASK (0x1 << 30)
#define PMU_TDC0_START_CAL_MASK (0x1 << 25)
+#define A375_Z1_CAL_RESET_LSB 0x8011e214
+#define A375_Z1_CAL_RESET_MSB 0x30a88019
+#define A375_Z1_WORKAROUND_BIT BIT(9)
+
+#define A375_UNIT_CONTROL_SHIFT 27
+#define A375_UNIT_CONTROL_MASK 0x7
+#define A375_READOUT_INVERT BIT(15)
+#define A375_HW_RESETn BIT(8)
+
struct armada_thermal_data;
/* Marvell EBU Thermal Sensor Dev Structure */
@@ -110,6 +119,36 @@ static void armada370_init_sensor(struct platform_device *pdev,
mdelay(10);
}
+static void armada375_init_sensor(struct platform_device *pdev,
+ struct armada_thermal_priv *priv)
+{
+ unsigned long reg;
+ bool quirk_needed =
+ !!of_device_is_compatible(pdev->dev.of_node,
+ "marvell,armada375-z1-thermal");
+
+ if (quirk_needed) {
+ /* Ensure these registers have the default (reset) values */
+ writel(A375_Z1_CAL_RESET_LSB, priv->control);
+ writel(A375_Z1_CAL_RESET_MSB, priv->control + 0x4);
+ }
+
+ reg = readl(priv->control + 4);
+ reg &= ~(A375_UNIT_CONTROL_MASK << A375_UNIT_CONTROL_SHIFT);
+ reg &= ~A375_READOUT_INVERT;
+ reg &= ~A375_HW_RESETn;
+
+ if (quirk_needed)
+ reg |= A375_Z1_WORKAROUND_BIT;
+
+ writel(reg, priv->control + 4);
+ mdelay(20);
+
+ reg |= A375_HW_RESETn;
+ writel(reg, priv->control + 4);
+ mdelay(50);
+}
+
static bool armada_is_valid(struct armada_thermal_priv *priv)
{
unsigned long reg = readl_relaxed(priv->sensor);
@@ -170,6 +209,17 @@ static const struct armada_thermal_data armada370_data = {
.coef_div = 13825,
};
+static const struct armada_thermal_data armada375_data = {
+ .is_valid = armada_is_valid,
+ .init_sensor = armada375_init_sensor,
+ .is_valid_shift = 10,
+ .temp_shift = 0,
+ .temp_mask = 0x1ff,
+ .coef_b = 3171900000UL,
+ .coef_m = 10000000UL,
+ .coef_div = 13616,
+};
+
static const struct of_device_id armada_thermal_id_table[] = {
{
.compatible = "marvell,armadaxp-thermal",
@@ -180,6 +230,14 @@ static const struct of_device_id armada_thermal_id_table[] = {
.data = &armada370_data,
},
{
+ .compatible = "marvell,armada375-thermal",
+ .data = &armada375_data,
+ },
+ {
+ .compatible = "marvell,armada375-z1-thermal",
+ .data = &armada375_data,
+ },
+ {
/* sentinel */
},
};
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