This patch adds devicetree support for the clps711x-spi driver and completely removes the non-DT support. This change is safe, because the current kernel code does not have a users of this driver.
Signed-off-by: Alexander Shiyan <[email protected]> --- drivers/spi/spi-clps711x.c | 61 ++++++++++-------------------- include/linux/platform_data/spi-clps711x.h | 21 ---------- 2 files changed, 20 insertions(+), 62 deletions(-) delete mode 100644 include/linux/platform_data/spi-clps711x.h diff --git a/drivers/spi/spi-clps711x.c b/drivers/spi/spi-clps711x.c index 181cf22..355a6cc 100644 --- a/drivers/spi/spi-clps711x.c +++ b/drivers/spi/spi-clps711x.c @@ -12,7 +12,6 @@ #include <linux/io.h> #include <linux/clk.h> #include <linux/gpio.h> -#include <linux/delay.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/platform_device.h> @@ -20,9 +19,8 @@ #include <linux/mfd/syscon.h> #include <linux/mfd/syscon/clps711x.h> #include <linux/spi/spi.h> -#include <linux/platform_data/spi-clps711x.h> -#define DRIVER_NAME "spi-clps711x" +#define DRIVER_NAME "clps711x-spi" #define SYNCIO_FRMLEN(x) ((x) << 8) #define SYNCIO_TXFRMEN (1 << 14) @@ -104,21 +102,10 @@ static irqreturn_t spi_clps711x_isr(int irq, void *dev_id) static int spi_clps711x_probe(struct platform_device *pdev) { struct spi_clps711x_data *hw; - struct spi_clps711x_pdata *pdata = dev_get_platdata(&pdev->dev); struct spi_master *master; struct resource *res; int i, irq, ret; - if (!pdata) { - dev_err(&pdev->dev, "No platform data supplied\n"); - return -EINVAL; - } - - if (pdata->num_chipselect < 1) { - dev_err(&pdev->dev, "At least one CS must be defined\n"); - return -EINVAL; - } - irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; @@ -127,40 +114,24 @@ static int spi_clps711x_probe(struct platform_device *pdev) if (!master) return -ENOMEM; - master->cs_gpios = devm_kzalloc(&pdev->dev, sizeof(int) * - pdata->num_chipselect, GFP_KERNEL); - if (!master->cs_gpios) { - ret = -ENOMEM; - goto err_out; - } - - master->bus_num = pdev->id; + master->bus_num = -1; master->mode_bits = SPI_CPHA | SPI_CS_HIGH; master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 8); - master->num_chipselect = pdata->num_chipselect; + master->dev.of_node = pdev->dev.of_node; master->setup = spi_clps711x_setup; master->prepare_message = spi_clps711x_prepare_message; master->transfer_one = spi_clps711x_transfer_one; hw = spi_master_get_devdata(master); - for (i = 0; i < master->num_chipselect; i++) { - master->cs_gpios[i] = pdata->chipselect[i]; - ret = devm_gpio_request(&pdev->dev, master->cs_gpios[i], - DRIVER_NAME); - if (ret) { - dev_err(&pdev->dev, "Can't get CS GPIO %i\n", i); - goto err_out; - } - } - hw->spi_clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(hw->spi_clk)) { ret = PTR_ERR(hw->spi_clk); goto err_out; } - hw->syscon = syscon_regmap_lookup_by_pdevname("syscon.3"); + hw->syscon = + syscon_regmap_lookup_by_compatible("cirrus,clps711x-syscon3"); if (IS_ERR(hw->syscon)) { ret = PTR_ERR(hw->syscon); goto err_out; @@ -185,14 +156,15 @@ static int spi_clps711x_probe(struct platform_device *pdev) goto err_out; ret = devm_spi_register_master(&pdev->dev, master); - if (!ret) { - dev_info(&pdev->dev, - "SPI bus driver initialized. Master clock %u Hz\n", - master->max_speed_hz); - return 0; - } + if (ret) + goto err_out; - dev_err(&pdev->dev, "Failed to register master\n"); + for (i = 0; i < master->num_chipselect; i++) { + ret = devm_gpio_request(&pdev->dev, master->cs_gpios[i], + dev_name(&pdev->dev)); + if (ret) + goto err_out; + } err_out: spi_master_put(master); @@ -200,10 +172,17 @@ err_out: return ret; } +static const struct of_device_id clps711x_spi_dt_ids[] = { + { .compatible = "cirrus,clps711x-spi", }, + { } +}; +MODULE_DEVICE_TABLE(of, clps711x_spi_dt_ids); + static struct platform_driver clps711x_spi_driver = { .driver = { .name = DRIVER_NAME, .owner = THIS_MODULE, + .of_match_table = clps711x_spi_dt_ids, }, .probe = spi_clps711x_probe, }; diff --git a/include/linux/platform_data/spi-clps711x.h b/include/linux/platform_data/spi-clps711x.h deleted file mode 100644 index 301956e..0000000 --- a/include/linux/platform_data/spi-clps711x.h +++ /dev/null @@ -1,21 +0,0 @@ -/* - * CLPS711X SPI bus driver definitions - * - * Copyright (C) 2012 Alexander Shiyan <[email protected]> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#ifndef ____LINUX_PLATFORM_DATA_SPI_CLPS711X_H -#define ____LINUX_PLATFORM_DATA_SPI_CLPS711X_H - -/* Board specific platform_data */ -struct spi_clps711x_pdata { - int *chipselect; /* Array of GPIO-numbers */ - int num_chipselect; /* Total count of GPIOs */ -}; - -#endif -- 1.8.5.5 -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
