diff options
Diffstat (limited to 'drivers/fpga/altera-ps-spi.c')
| -rw-r--r-- | drivers/fpga/altera-ps-spi.c | 86 |
1 files changed, 18 insertions, 68 deletions
diff --git a/drivers/fpga/altera-ps-spi.c b/drivers/fpga/altera-ps-spi.c index 8c18beec6b57..d0ec3539b31f 100644 --- a/drivers/fpga/altera-ps-spi.c +++ b/drivers/fpga/altera-ps-spi.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Altera Passive Serial SPI Driver * @@ -5,10 +6,6 @@ * * Joshua Clayton <stillcompiling@gmail.com> * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * * Manage Altera FPGA firmware that is loaded over SPI using the passive * serial configuration method. * Firmware must be in binary "rbf" format. @@ -21,8 +18,7 @@ #include <linux/fpga/fpga-mgr.h> #include <linux/gpio/consumer.h> #include <linux/module.h> -#include <linux/of_gpio.h> -#include <linux/of_device.h> +#include <linux/of.h> #include <linux/spi/spi.h> #include <linux/sizes.h> @@ -75,12 +71,6 @@ static struct altera_ps_data a10_data = { .t_st2ck_us = 10, /* min(t_ST2CK) */ }; -/* Array index is enum altera_ps_devtype */ -static const struct altera_ps_data *altera_ps_data_map[] = { - &c5_data, - &a10_data, -}; - static const struct of_device_id of_ef_match[] = { { .compatible = "altr,fpga-passive-serial", .data = &c5_data }, { .compatible = "altr,fpga-arria10-passive-serial", .data = &a10_data }, @@ -205,7 +195,7 @@ static int altera_ps_write_complete(struct fpga_manager *mgr, struct fpga_image_info *info) { struct altera_ps_conf *conf = mgr->priv; - const char dummy[] = {0}; + static const char dummy[] = {0}; int ret; if (gpiod_get_value_cansleep(conf->status)) { @@ -213,7 +203,7 @@ static int altera_ps_write_complete(struct fpga_manager *mgr, return -EIO; } - if (!IS_ERR(conf->confd)) { + if (conf->confd) { if (!gpiod_get_raw_value_cansleep(conf->confd)) { dev_err(&mgr->dev, "CONF_DONE is inactive!\n"); return -EIO; @@ -240,43 +230,16 @@ static const struct fpga_manager_ops altera_ps_ops = { .write_complete = altera_ps_write_complete, }; -static const struct altera_ps_data *id_to_data(const struct spi_device_id *id) -{ - kernel_ulong_t devtype = id->driver_data; - const struct altera_ps_data *data; - - /* someone added a altera_ps_devtype without adding to the map array */ - if (devtype >= ARRAY_SIZE(altera_ps_data_map)) - return NULL; - - data = altera_ps_data_map[devtype]; - if (!data || data->devtype != devtype) - return NULL; - - return data; -} - static int altera_ps_probe(struct spi_device *spi) { struct altera_ps_conf *conf; - const struct of_device_id *of_id; struct fpga_manager *mgr; conf = devm_kzalloc(&spi->dev, sizeof(*conf), GFP_KERNEL); if (!conf) return -ENOMEM; - if (spi->dev.of_node) { - of_id = of_match_device(of_ef_match, &spi->dev); - if (!of_id) - return -ENODEV; - conf->data = of_id->data; - } else { - conf->data = id_to_data(spi_get_device_id(spi)); - if (!conf->data) - return -ENODEV; - } - + conf->data = spi_get_device_match_data(spi); conf->spi = spi; conf->config = devm_gpiod_get(&spi->dev, "nconfig", GPIOD_OUT_LOW); if (IS_ERR(conf->config)) { @@ -292,39 +255,28 @@ static int altera_ps_probe(struct spi_device *spi) return PTR_ERR(conf->status); } - conf->confd = devm_gpiod_get(&spi->dev, "confd", GPIOD_IN); + conf->confd = devm_gpiod_get_optional(&spi->dev, "confd", GPIOD_IN); if (IS_ERR(conf->confd)) { - dev_warn(&spi->dev, "Not using confd gpio: %ld\n", - PTR_ERR(conf->confd)); + dev_err(&spi->dev, "Failed to get confd gpio: %ld\n", + PTR_ERR(conf->confd)); + return PTR_ERR(conf->confd); + } else if (!conf->confd) { + dev_warn(&spi->dev, "Not using confd gpio"); } /* Register manager with unique name */ snprintf(conf->mgr_name, sizeof(conf->mgr_name), "%s %s", dev_driver_string(&spi->dev), dev_name(&spi->dev)); - mgr = devm_fpga_mgr_create(&spi->dev, conf->mgr_name, - &altera_ps_ops, conf); - if (!mgr) - return -ENOMEM; - - spi_set_drvdata(spi, mgr); - - return fpga_mgr_register(mgr); -} - -static int altera_ps_remove(struct spi_device *spi) -{ - struct fpga_manager *mgr = spi_get_drvdata(spi); - - fpga_mgr_unregister(mgr); - - return 0; + mgr = devm_fpga_mgr_register(&spi->dev, conf->mgr_name, + &altera_ps_ops, conf); + return PTR_ERR_OR_ZERO(mgr); } static const struct spi_device_id altera_ps_spi_ids[] = { - { "cyclone-ps-spi", CYCLONE5 }, - { "fpga-passive-serial", CYCLONE5 }, - { "fpga-arria10-passive-serial", ARRIA10 }, + { "cyclone-ps-spi", (uintptr_t)&c5_data }, + { "fpga-passive-serial", (uintptr_t)&c5_data }, + { "fpga-arria10-passive-serial", (uintptr_t)&a10_data }, {} }; MODULE_DEVICE_TABLE(spi, altera_ps_spi_ids); @@ -332,12 +284,10 @@ MODULE_DEVICE_TABLE(spi, altera_ps_spi_ids); static struct spi_driver altera_ps_driver = { .driver = { .name = "altera-ps-spi", - .owner = THIS_MODULE, - .of_match_table = of_match_ptr(of_ef_match), + .of_match_table = of_ef_match, }, .id_table = altera_ps_spi_ids, .probe = altera_ps_probe, - .remove = altera_ps_remove, }; module_spi_driver(altera_ps_driver) |