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| author | Lin, Meng-Bo <linmengbo0689@protonmail.com> | 2023-10-28 01:56:33 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-10-28 02:20:38 +0300 |
| commit | 2f06996d72df779a47852bcf059fc04a555fe342 (patch) | |
| tree | a7c80318b07e7fe07272eb5839edfee048b9a9cb /drivers/input | |
| parent | fade5a92931c241be5b7e185d946205cfdfcb26f (diff) | |
| download | linux-2f06996d72df779a47852bcf059fc04a555fe342.tar.xz | |
Input: cyttsp5 - add handling for vddio regulator
The Cypress touchscreen controllers are often used with external pull-up
for the interrupt line and the I2C lines, so we might need to enable
a regulator to bring the lines into usable state. Otherwise, this might
cause spurious interrupts and reading from I2C will fail.
Implement support for a "vddio-supply" that is enabled by the cyttsp5
driver so that the regulator gets enabled when needed.
Signed-off-by: Lin, Meng-Bo <linmengbo0689@protonmail.com>
Acked-by: Alistair Francis <alistair@alistair23.me>
Link: https://lore.kernel.org/r/20221117190507.87535-3-linmengbo0689@protonmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/touchscreen/cyttsp5.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/input/touchscreen/cyttsp5.c b/drivers/input/touchscreen/cyttsp5.c index db5a885ecd72..68527ede5c0e 100644 --- a/drivers/input/touchscreen/cyttsp5.c +++ b/drivers/input/touchscreen/cyttsp5.c @@ -207,7 +207,7 @@ struct cyttsp5 { int num_prv_rec; struct regmap *regmap; struct touchscreen_properties prop; - struct regulator *vdd; + struct regulator_bulk_data supplies[2]; }; /* @@ -817,7 +817,7 @@ static void cyttsp5_cleanup(void *data) { struct cyttsp5 *ts = data; - regulator_disable(ts->vdd); + regulator_bulk_disable(ARRAY_SIZE(ts->supplies), ts->supplies); } static int cyttsp5_probe(struct device *dev, struct regmap *regmap, int irq, @@ -840,9 +840,12 @@ static int cyttsp5_probe(struct device *dev, struct regmap *regmap, int irq, init_completion(&ts->cmd_done); /* Power up the device */ - ts->vdd = devm_regulator_get(dev, "vdd"); - if (IS_ERR(ts->vdd)) { - error = PTR_ERR(ts->vdd); + ts->supplies[0].supply = "vdd"; + ts->supplies[1].supply = "vddio"; + error = devm_regulator_bulk_get(dev, ARRAY_SIZE(ts->supplies), + ts->supplies); + if (error) { + dev_err(ts->dev, "Failed to get regulators, error %d\n", error); return error; } @@ -850,9 +853,11 @@ static int cyttsp5_probe(struct device *dev, struct regmap *regmap, int irq, if (error) return error; - error = regulator_enable(ts->vdd); - if (error) + error = regulator_bulk_enable(ARRAY_SIZE(ts->supplies), ts->supplies); + if (error) { + dev_err(ts->dev, "Failed to enable regulators, error %d\n", error); return error; + } ts->input = devm_input_allocate_device(dev); if (!ts->input) { |