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This commit adds emulation of sandbox PMIC device, which includes: - PMIC I2C emulation driver - PMIC I/O driver (UCLASS_PMIC) - PMIC regulator driver (UCLASS_REGULATOR) The sandbox PMIC has 12 significant registers and 4 as padding to 16 bytes, which allows using 'i2c md' command with the default count (16). The sandbox PMIC provides regulators: - 2x BUCK - 2x LDO Each, with adjustable output: - Enable state - Voltage - Current limit (LDO1/BUCK1 only) - Operation mode (different for BUCK and LDO) Each attribute has it's own register, beside the enable state, which depends on operation mode. The header file: sandbox_pmic.h includes PMIC's default register values, which are set on i2c pmic emul driver's probe() method. Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Tested on sandbox: Tested-by: Simon Glass <sjg@chromium.org>
46 lines
1.3 KiB
Plaintext
46 lines
1.3 KiB
Plaintext
Sandbox, PMIC regulators
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This device uses two drivers:
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- drivers/power/pmic/sandbox.c (as parent I/O device)
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- drivers/power/regulator/sandbox.c (for child regulators)
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This file describes the binding info for the REGULATOR driver.
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First, please read the binding info for the PMIC:
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- doc/device-tree-bindings/pmic/sandbox.txt
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Required subnodes:
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- ldoN { };
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- buckN { };
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The sandbox PMIC can support: ldo1, ldo2, buck1, buck2.
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For each PMIC's regulator subnode, there is one required property:
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- regulator-name: used for regulator uclass platform data '.name'
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Optional:
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- regulator-min-microvolt: minimum allowed Voltage to set
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- regulator-max-microvolt: minimum allowed Voltage to set
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- regulator-min-microamps: minimum allowed Current limit to set (LDO1/BUCK1)
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- regulator-max-microamps: minimum allowed Current limit to set (LDO1/BUCK1)
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- regulator-always-on: regulator should be never disabled
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- regulator-boot-on: regulator should be enabled by the bootloader
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Example PMIC's regulator subnodes:
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ldo1 {
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regulator-name = "VDD_1.0V";
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regulator-min-microvolt = <1000000>;
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regulator-max-microvolt = <1200000>;
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regulator-min-microamps = <100000>;
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regulator-max-microamps = <400000>;
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regulator-always-on;
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};
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buck2 {
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regulator-name = "VDD_1.8V";
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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regulator-boot-on;
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};
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