[PATCH v2 31/46] mfd: ti_am335x_tscadc: Add a boolean to clarify the presence of a touchscreen
STALE1839d
From: Miquel Raynal <miquel.raynal@bootlin.com>
Date: 2021-09-02 21:52:57
Also in:
linux-devicetree, linux-iio, linux-omap
Subsystem:
multifunction devices (mfd), the rest · Maintainers:
Lee Jones, Linus Torvalds
Revision v2 of 5 in this series.
Revisions (5)
Just checking the number of wires will soon not be enough, add a boolean to indicated the actual use or not of the touchscreen. Certain checks only make sense when there is a touchscreen wired. Make this checks explicitly depend on the presence of the touchscreen. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> --- drivers/mfd/ti_am335x_tscadc.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c
index f30bcdf600fb..cfdef833dffb 100644
--- a/drivers/mfd/ti_am335x_tscadc.c
+++ b/drivers/mfd/ti_am335x_tscadc.c@@ -120,6 +120,7 @@ static int ti_tscadc_probe(struct platform_device *pdev) struct mfd_cell *cell; struct property *prop; const __be32 *cur; + bool use_tsc = false; u32 val; int err; int tscmag_wires = 0, adc_channels = 0, cell_idx = 0, total_channels;
@@ -143,6 +144,8 @@ static int ti_tscadc_probe(struct platform_device *pdev) of_property_read_u32(node, "ti,wires", &tscmag_wires); of_property_read_u32(node, "ti,coordiante-readouts", &readouts); of_node_put(node); + if (tscmag_wires) + use_tsc = true; node = of_get_child_by_name(pdev->dev.of_node, "adc"); of_property_for_each_u32(node, "ti,adc-channels", prop, cur, val) {
@@ -168,7 +171,7 @@ static int ti_tscadc_probe(struct platform_device *pdev) return -EINVAL; } - if (readouts * 2 + 2 + adc_channels > 16) { + if (use_tsc && (readouts * 2 + 2 + adc_channels > 16)) { dev_err(&pdev->dev, "Too many step configurations requested\n"); return -EINVAL; }
@@ -221,7 +224,7 @@ static int ti_tscadc_probe(struct platform_device *pdev) /* Set the control register bits */ tscadc->ctrl = CNTRLREG_TSC_STEPCONFIGWRT | CNTRLREG_STEPID; - if (tscmag_wires > 0) { + if (use_tsc) { tscadc->ctrl |= CNTRLREG_TSC_ENB; if (tscmag_wires == 5) tscadc->ctrl |= CNTRLREG_TSC_5WIRE;
--
2.27.0