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011f2c26f1
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
94 lines
2.5 KiB
Diff
94 lines
2.5 KiB
Diff
From c78b3b917d305e617ad11d147c9668b1df338208 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Tue, 8 Nov 2016 21:35:38 +0000
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Subject: [PATCH] spi-bcm2835: Remove unused code
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---
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drivers/spi/spi-bcm2835.c | 66 -----------------------------------------------
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1 file changed, 66 deletions(-)
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--- a/drivers/spi/spi-bcm2835.c
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+++ b/drivers/spi/spi-bcm2835.c
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@@ -679,17 +679,8 @@ static void bcm2835_spi_set_cs(struct sp
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bcm2835_wr(bs, BCM2835_SPI_CS, cs);
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}
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-static int chip_match_name(struct gpio_chip *chip, void *data)
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-{
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- return !strcmp(chip->label, data);
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-}
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-
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static int bcm2835_spi_setup(struct spi_device *spi)
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{
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- int err;
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- struct gpio_chip *chip;
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- struct device_node *pins;
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- u32 pingroup_index;
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/*
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* sanity checking the native-chipselects
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*/
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@@ -707,63 +698,6 @@ static int bcm2835_spi_setup(struct spi_
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return -EINVAL;
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}
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-#if 0
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- /* now translate native cs to GPIO */
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- /* first look for chip select pins in the devices pin groups */
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- for (pingroup_index = 0;
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- (pins = of_parse_phandle(spi->master->dev.of_node,
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- "pinctrl-0",
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- pingroup_index)) != 0;
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- pingroup_index++) {
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- u32 pin;
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- u32 pin_index;
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- for (pin_index = 0;
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- of_property_read_u32_index(pins,
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- "brcm,pins",
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- pin_index,
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- &pin) == 0;
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- pin_index++) {
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- if (((spi->chip_select == 0) &&
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- ((pin == 8) || (pin == 36) || (pin == 46))) ||
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- ((spi->chip_select == 1) &&
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- ((pin == 7) || (pin == 35)))) {
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- spi->cs_gpio = pin;
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- break;
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- }
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- }
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- of_node_put(pins);
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- }
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- /* if that fails, assume GPIOs 7-11 are used */
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- if (!gpio_is_valid(spi->cs_gpio) ) {
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- /* get the gpio chip for the base */
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- chip = gpiochip_find("pinctrl-bcm2835", chip_match_name);
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- if (!chip)
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- return 0;
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-
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- /* and calculate the real CS */
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- spi->cs_gpio = chip->base + 8 - spi->chip_select;
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- }
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-
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- /* and set up the "mode" and level */
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- dev_info(&spi->dev, "setting up native-CS%i as GPIO %i\n",
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- spi->chip_select, spi->cs_gpio);
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-
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- /* set up GPIO as output and pull to the correct level */
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- err = gpio_direction_output(spi->cs_gpio,
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- (spi->mode & SPI_CS_HIGH) ? 0 : 1);
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- if (err) {
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- dev_err(&spi->dev,
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- "could not set CS%i gpio %i as output: %i",
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- spi->chip_select, spi->cs_gpio, err);
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- return err;
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- }
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- /* the implementation of pinctrl-bcm2835 currently does not
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- * set the GPIO value when using gpio_direction_output
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- * so we are setting it here explicitly
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- */
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- gpio_set_value(spi->cs_gpio, (spi->mode & SPI_CS_HIGH) ? 0 : 1);
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-#endif
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-
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return 0;
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}
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