From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/drivers/fpga/altera-ps-spi.c | 58 ++++++++++++++++++++++++++++++++++++++++------------------
1 files changed, 40 insertions(+), 18 deletions(-)
diff --git a/kernel/drivers/fpga/altera-ps-spi.c b/kernel/drivers/fpga/altera-ps-spi.c
index 4925cae..0221dee 100644
--- a/kernel/drivers/fpga/altera-ps-spi.c
+++ b/kernel/drivers/fpga/altera-ps-spi.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Altera Passive Serial SPI Driver
*
* Copyright (c) 2017 United Western Technologies, Corporation
*
* 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.
@@ -73,6 +70,12 @@
.status_wait_max_us = 3000, /* max(t_CF2ST1) */
.t_cfg_us = 2, /* max { min(t_CFG), max(tCF2ST0) } */
.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[] = {
@@ -199,7 +202,7 @@
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)) {
@@ -234,22 +237,43 @@
.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;
- int ret;
conf = devm_kzalloc(&spi->dev, sizeof(*conf), GFP_KERNEL);
if (!conf)
return -ENOMEM;
- of_id = of_match_device(of_ef_match, &spi->dev);
- if (!of_id)
- return -ENODEV;
+ 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 = of_id->data;
conf->spi = spi;
conf->config = devm_gpiod_get(&spi->dev, "nconfig", GPIOD_OUT_LOW);
if (IS_ERR(conf->config)) {
@@ -278,18 +302,14 @@
snprintf(conf->mgr_name, sizeof(conf->mgr_name), "%s %s",
dev_driver_string(&spi->dev), dev_name(&spi->dev));
- mgr = fpga_mgr_create(&spi->dev, conf->mgr_name,
- &altera_ps_ops, conf);
+ mgr = devm_fpga_mgr_create(&spi->dev, conf->mgr_name,
+ &altera_ps_ops, conf);
if (!mgr)
return -ENOMEM;
spi_set_drvdata(spi, mgr);
- ret = fpga_mgr_register(mgr);
- if (ret)
- fpga_mgr_free(mgr);
-
- return ret;
+ return fpga_mgr_register(mgr);
}
static int altera_ps_remove(struct spi_device *spi)
@@ -302,7 +322,9 @@
}
static const struct spi_device_id altera_ps_spi_ids[] = {
- {"cyclone-ps-spi", 0},
+ { "cyclone-ps-spi", CYCLONE5 },
+ { "fpga-passive-serial", CYCLONE5 },
+ { "fpga-arria10-passive-serial", ARRIA10 },
{}
};
MODULE_DEVICE_TABLE(spi, altera_ps_spi_ids);
--
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