2018-06-14 09:56:06 +08:00
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// SPDX-License-Identifier: GPL-2.0
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ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
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/*
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* R-Car Generation 2 da9063/da9210 regulator quirk
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*
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2018-02-15 19:33:50 +08:00
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* Certain Gen2 development boards have an da9063 and one or more da9210
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* regulators. All of these regulators have their interrupt request lines
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* tied to the same interrupt pin (IRQ2) on the SoC.
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ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
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*
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* After cold boot or da9063-induced restart, both the da9063 and da9210 seem
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* to assert their interrupt request lines. Hence as soon as one driver
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* requests this irq, it gets stuck in an interrupt storm, as it only manages
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* to deassert its own interrupt request line, and the other driver hasn't
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* installed an interrupt handler yet.
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*
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* To handle this, install a quirk that masks the interrupts in both the
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* da9063 and da9210. This quirk has to run after the i2c master driver has
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* been initialized, but before the i2c slave drivers are initialized.
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*
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* Copyright (C) 2015 Glider bvba
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*/
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#include <linux/device.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/io.h>
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2018-09-18 20:23:40 +08:00
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#include <linux/list.h>
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ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
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#include <linux/notifier.h>
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#include <linux/of.h>
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2018-09-18 20:23:40 +08:00
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#include <linux/of_irq.h>
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ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
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#include <linux/mfd/da9063/registers.h>
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#define IRQC_BASE 0xe61c0000
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#define IRQC_MONITOR 0x104 /* IRQn Signal Level Monitor Register */
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#define REGULATOR_IRQ_MASK BIT(2) /* IRQ2, active low */
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2016-08-31 03:50:22 +08:00
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/* start of DA9210 System Control and Event Registers */
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ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
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#define DA9210_REG_MASK_A 0x54
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2018-09-18 20:23:40 +08:00
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struct regulator_quirk {
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struct list_head list;
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const struct of_device_id *id;
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struct of_phandle_args irq_args;
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struct i2c_msg i2c_msg;
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bool shared; /* IRQ line is shared */
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};
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static LIST_HEAD(quirk_list);
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2016-08-31 03:50:22 +08:00
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static void __iomem *irqc;
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ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
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2016-08-31 03:50:22 +08:00
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/* first byte sets the memory pointer, following are consecutive reg values */
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static u8 da9063_irq_clr[] = { DA9063_REG_IRQ_MASK_A, 0xff, 0xff, 0xff, 0xff };
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static u8 da9210_irq_clr[] = { DA9210_REG_MASK_A, 0xff, 0xff };
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2018-09-18 20:23:40 +08:00
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static struct i2c_msg da9063_msg = {
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.len = ARRAY_SIZE(da9063_irq_clr),
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.buf = da9063_irq_clr,
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};
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static struct i2c_msg da9210_msg = {
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.len = ARRAY_SIZE(da9210_irq_clr),
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.buf = da9210_irq_clr,
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};
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static const struct of_device_id rcar_gen2_quirk_match[] = {
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{ .compatible = "dlg,da9063", .data = &da9063_msg },
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{ .compatible = "dlg,da9210", .data = &da9210_msg },
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{},
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2016-08-31 03:50:22 +08:00
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};
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ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
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static int regulator_quirk_notify(struct notifier_block *nb,
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unsigned long action, void *data)
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{
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2018-09-18 20:23:40 +08:00
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struct regulator_quirk *pos, *tmp;
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ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
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struct device *dev = data;
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struct i2c_client *client;
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2017-07-12 22:45:20 +08:00
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static bool done;
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2018-09-18 20:23:40 +08:00
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int ret;
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ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
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u32 mon;
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2017-07-12 22:45:20 +08:00
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if (done)
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return 0;
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ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
|
|
|
mon = ioread32(irqc + IRQC_MONITOR);
|
|
|
|
dev_dbg(dev, "%s: %ld, IRQC_MONITOR = 0x%x\n", __func__, action, mon);
|
|
|
|
if (mon & REGULATOR_IRQ_MASK)
|
|
|
|
goto remove;
|
|
|
|
|
|
|
|
if (action != BUS_NOTIFY_ADD_DEVICE || dev->type == &i2c_adapter_type)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
client = to_i2c_client(dev);
|
|
|
|
dev_dbg(dev, "Detected %s\n", client->name);
|
|
|
|
|
2018-09-18 20:23:40 +08:00
|
|
|
/*
|
|
|
|
* Send message to all PMICs that share an IRQ line to deassert it.
|
|
|
|
*
|
|
|
|
* WARNING: This works only if all the PMICs are on the same I2C bus.
|
|
|
|
*/
|
|
|
|
list_for_each_entry(pos, &quirk_list, list) {
|
|
|
|
if (!pos->shared)
|
|
|
|
continue;
|
2018-02-15 19:33:50 +08:00
|
|
|
|
2018-09-18 20:23:40 +08:00
|
|
|
dev_info(&client->dev, "clearing %s@0x%02x interrupts\n",
|
|
|
|
pos->id->compatible, pos->i2c_msg.addr);
|
2016-08-31 03:50:22 +08:00
|
|
|
|
2018-09-18 20:23:40 +08:00
|
|
|
ret = i2c_transfer(client->adapter, &pos->i2c_msg, 1);
|
|
|
|
if (ret != 1)
|
2016-08-31 03:50:22 +08:00
|
|
|
dev_err(&client->dev, "i2c error %d\n", ret);
|
|
|
|
}
|
ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
|
|
|
|
|
|
|
mon = ioread32(irqc + IRQC_MONITOR);
|
|
|
|
if (mon & REGULATOR_IRQ_MASK)
|
|
|
|
goto remove;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
remove:
|
|
|
|
dev_info(dev, "IRQ2 is not asserted, removing quirk\n");
|
|
|
|
|
2018-09-18 20:23:40 +08:00
|
|
|
list_for_each_entry_safe(pos, tmp, &quirk_list, list) {
|
|
|
|
list_del(&pos->list);
|
|
|
|
kfree(pos);
|
|
|
|
}
|
|
|
|
|
2017-07-12 22:45:20 +08:00
|
|
|
done = true;
|
ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
|
|
|
iounmap(irqc);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct notifier_block regulator_quirk_nb = {
|
|
|
|
.notifier_call = regulator_quirk_notify
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init rcar_gen2_regulator_quirk(void)
|
|
|
|
{
|
2018-09-18 20:23:40 +08:00
|
|
|
struct regulator_quirk *quirk, *pos, *tmp;
|
|
|
|
struct of_phandle_args *argsa, *argsb;
|
|
|
|
const struct of_device_id *id;
|
|
|
|
struct device_node *np;
|
|
|
|
u32 mon, addr;
|
|
|
|
int ret;
|
ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
|
|
|
|
|
|
|
if (!of_machine_is_compatible("renesas,koelsch") &&
|
2015-06-01 22:22:57 +08:00
|
|
|
!of_machine_is_compatible("renesas,lager") &&
|
2018-02-15 19:33:50 +08:00
|
|
|
!of_machine_is_compatible("renesas,stout") &&
|
2015-06-01 22:22:57 +08:00
|
|
|
!of_machine_is_compatible("renesas,gose"))
|
ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
|
|
|
return -ENODEV;
|
|
|
|
|
2018-09-18 20:23:40 +08:00
|
|
|
for_each_matching_node_and_match(np, rcar_gen2_quirk_match, &id) {
|
|
|
|
if (!of_device_is_available(np))
|
|
|
|
break;
|
|
|
|
|
|
|
|
ret = of_property_read_u32(np, "reg", &addr);
|
|
|
|
if (ret) /* Skip invalid entry and continue */
|
|
|
|
continue;
|
|
|
|
|
|
|
|
quirk = kzalloc(sizeof(*quirk), GFP_KERNEL);
|
|
|
|
if (!quirk) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto err_mem;
|
|
|
|
}
|
|
|
|
|
|
|
|
argsa = &quirk->irq_args;
|
|
|
|
memcpy(&quirk->i2c_msg, id->data, sizeof(quirk->i2c_msg));
|
|
|
|
|
|
|
|
quirk->id = id;
|
|
|
|
quirk->i2c_msg.addr = addr;
|
|
|
|
|
|
|
|
ret = of_irq_parse_one(np, 0, argsa);
|
|
|
|
if (ret) { /* Skip invalid entry and continue */
|
|
|
|
kfree(quirk);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
list_for_each_entry(pos, &quirk_list, list) {
|
|
|
|
argsb = &pos->irq_args;
|
|
|
|
|
|
|
|
if (argsa->args_count != argsb->args_count)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
ret = memcmp(argsa->args, argsb->args,
|
|
|
|
argsa->args_count *
|
|
|
|
sizeof(argsa->args[0]));
|
|
|
|
if (!ret) {
|
|
|
|
pos->shared = true;
|
|
|
|
quirk->shared = true;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
list_add_tail(&quirk->list, &quirk_list);
|
|
|
|
}
|
|
|
|
|
ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
|
|
|
irqc = ioremap(IRQC_BASE, PAGE_SIZE);
|
2018-09-18 20:23:40 +08:00
|
|
|
if (!irqc) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto err_mem;
|
|
|
|
}
|
ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
|
|
|
|
|
|
|
mon = ioread32(irqc + IRQC_MONITOR);
|
|
|
|
if (mon & REGULATOR_IRQ_MASK) {
|
|
|
|
pr_debug("%s: IRQ2 is not asserted, not installing quirk\n",
|
|
|
|
__func__);
|
2018-09-18 20:23:40 +08:00
|
|
|
ret = 0;
|
|
|
|
goto err_free;
|
ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
pr_info("IRQ2 is asserted, installing da9063/da9210 regulator quirk\n");
|
|
|
|
|
|
|
|
bus_register_notifier(&i2c_bus_type, ®ulator_quirk_nb);
|
|
|
|
return 0;
|
2018-09-18 20:23:40 +08:00
|
|
|
|
|
|
|
err_free:
|
|
|
|
iounmap(irqc);
|
|
|
|
err_mem:
|
|
|
|
list_for_each_entry_safe(pos, tmp, &quirk_list, list) {
|
|
|
|
list_del(&pos->list);
|
|
|
|
kfree(pos);
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
ARM: shmobile: R-Car Gen2: Add da9063/da9210 regulator quirk
The r8a7790/lager and r8a7791/koelsch development boards have da9063 and
da9210 regulators. Both regulators have their interrupt request lines
tied to the same interrupt pin (IRQ2) on the SoC.
After cold boot or da9063-induced restart, both the da9063 and da9210
seem to assert their interrupt request lines. Hence as soon as one
driver requests this irq, it gets stuck in an interrupt storm, as it
only manages to deassert its own interrupt request line, and the other
driver hasn't installed an interrupt handler yet.
To handle this, install a quirk that masks the interrupts in both the
da9063 and da9210. This quirk has to run after the i2c master driver
has been initialized, but before the i2c slave drivers are initialized.
As it depends on i2c, select I2C if one of the affected platforms is
enabled in the kernel config.
On koelsch, the following happens:
- Cold boot or reboot using the da9063 restart handler:
IRQ2 is asserted, installing da9063/da9210 regulator quirk
...
i2c i2c-6: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0058: Detected da9063
i2c 6-0058: Masking da9063 interrupt sources
i2c 6-0068: regulator_quirk_notify: 1, IRQC_MONITOR = 0x3fb
i2c 6-0068: Detected da9210
i2c 6-0068: Masking da9210 interrupt sources
i2c 6-0068: IRQ2 is not asserted, removing quirk
- Warm boot (reset button):
rcar_gen2_regulator_quirk: IRQ2 is not asserted, not installing quirk
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-03-10 03:50:40 +08:00
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arch_initcall(rcar_gen2_regulator_quirk);
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