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spi: meson-spicc: Use GPIO descriptors

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Instead of grabbing GPIOs using the legacy interface and
handling them in the setup callback, just let the core
grab and use the GPIOs using descriptors.

Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Sunny Luo <sunny.luo@amlogic.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20191205083915.27650-1-linus.walleij@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Linus Walleij 2019-12-05 09:39:15 +01:00 committed by Mark Brown
parent 0a454258fe
commit cd8fb859a8
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GPG Key ID: 24D68B725D5487D0
1 changed files with 2 additions and 23 deletions
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25
drivers/spi/spi-meson-spicc.c
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@ -19,7 +19,6 @@
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/reset.h>
#include <linux/gpio.h>
/*
* The Meson SPICC controller could support DMA based transfers, but is not
@ -467,35 +466,14 @@ static int meson_spicc_unprepare_transfer(struct spi_master *master)
static int meson_spicc_setup(struct spi_device *spi)
{
int ret = 0;
if (!spi->controller_state)
spi->controller_state = spi_master_get_devdata(spi->master);
else if (gpio_is_valid(spi->cs_gpio))
goto out_gpio;
else if (spi->cs_gpio == -ENOENT)
return 0;
if (gpio_is_valid(spi->cs_gpio)) {
ret = gpio_request(spi->cs_gpio, dev_name(&spi->dev));
if (ret) {
dev_err(&spi->dev, "failed to request cs gpio\n");
return ret;
}
}
out_gpio:
ret = gpio_direction_output(spi->cs_gpio,
!(spi->mode & SPI_CS_HIGH));
return ret;
return 0;
}
static void meson_spicc_cleanup(struct spi_device *spi)
{
if (gpio_is_valid(spi->cs_gpio))
gpio_free(spi->cs_gpio);
spi->controller_state = NULL;
}
@ -564,6 +542,7 @@ static int meson_spicc_probe(struct platform_device *pdev)
master->prepare_message = meson_spicc_prepare_message;
master->unprepare_transfer_hardware = meson_spicc_unprepare_transfer;
master->transfer_one = meson_spicc_transfer_one;
master->use_gpio_descriptors = true;
/* Setup max rate according to the Meson GX datasheet */
if ((rate >> 2) > SPICC_MAX_FREQ)