From 879a52379704e479237d0b97822fd9302fed0675 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Wed, 2 Mar 2022 18:00:25 +0200 Subject: [PATCH] iio: multiplexer: Make use of device properties Convert the module to be property provider agnostic and allow it to be used on non-OF platforms. Signed-off-by: Andy Shevchenko Acked-by: Peter Rosin Link: https://lore.kernel.org/r/20220302160025.54348-1-andriy.shevchenko@linux.intel.com Signed-off-by: Jonathan Cameron --- drivers/iio/multiplexer/Kconfig | 1 - drivers/iio/multiplexer/iio-mux.c | 49 ++++++++++++++++++--------------------- 2 files changed, 23 insertions(+), 27 deletions(-) diff --git a/drivers/iio/multiplexer/Kconfig b/drivers/iio/multiplexer/Kconfig index a1e1332..928f424 100644 --- a/drivers/iio/multiplexer/Kconfig +++ b/drivers/iio/multiplexer/Kconfig @@ -9,7 +9,6 @@ menu "Multiplexers" config IIO_MUX tristate "IIO multiplexer driver" select MULTIPLEXER - depends on OF || COMPILE_TEST help Say yes here to build support for the IIO multiplexer. diff --git a/drivers/iio/multiplexer/iio-mux.c b/drivers/iio/multiplexer/iio-mux.c index f422d44..93558fd 100644 --- a/drivers/iio/multiplexer/iio-mux.c +++ b/drivers/iio/multiplexer/iio-mux.c @@ -10,11 +10,12 @@ #include #include #include +#include #include #include #include -#include #include +#include struct mux_ext_info_cache { char *data; @@ -324,37 +325,21 @@ static int mux_configure_channel(struct device *dev, struct mux *mux, return 0; } -/* - * Same as of_property_for_each_string(), but also keeps track of the - * index of each string. - */ -#define of_property_for_each_string_index(np, propname, prop, s, i) \ - for (prop = of_find_property(np, propname, NULL), \ - s = of_prop_next_string(prop, NULL), \ - i = 0; \ - s; \ - s = of_prop_next_string(prop, s), \ - i++) - static int mux_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - struct device_node *np = pdev->dev.of_node; struct iio_dev *indio_dev; struct iio_channel *parent; struct mux *mux; - struct property *prop; - const char *label; + const char **labels; + int all_children; + int children; u32 state; int sizeof_ext_info; - int children; int sizeof_priv; int i; int ret; - if (!np) - return -ENODEV; - parent = devm_iio_channel_get(dev, "parent"); if (IS_ERR(parent)) return dev_err_probe(dev, PTR_ERR(parent), @@ -366,9 +351,21 @@ static int mux_probe(struct platform_device *pdev) sizeof_ext_info *= sizeof(*mux->ext_info); } + all_children = device_property_string_array_count(dev, "channels"); + if (all_children < 0) + return all_children; + + labels = devm_kmalloc_array(dev, all_children, sizeof(*labels), GFP_KERNEL); + if (!labels) + return -ENOMEM; + + ret = device_property_read_string_array(dev, "channels", labels, all_children); + if (ret < 0) + return ret; + children = 0; - of_property_for_each_string(np, "channels", prop, label) { - if (*label) + for (state = 0; state < all_children; state++) { + if (*labels[state]) children++; } if (children <= 0) { @@ -395,7 +392,7 @@ static int mux_probe(struct platform_device *pdev) mux->cached_state = -1; mux->delay_us = 0; - of_property_read_u32(np, "settle-time-us", &mux->delay_us); + device_property_read_u32(dev, "settle-time-us", &mux->delay_us); indio_dev->name = dev_name(dev); indio_dev->info = &mux_info; @@ -426,11 +423,11 @@ static int mux_probe(struct platform_device *pdev) } i = 0; - of_property_for_each_string_index(np, "channels", prop, label, state) { - if (!*label) + for (state = 0; state < all_children; state++) { + if (!*labels[state]) continue; - ret = mux_configure_channel(dev, mux, state, label, i++); + ret = mux_configure_channel(dev, mux, state, labels[state], i++); if (ret < 0) return ret; } -- 2.7.4