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path: root/drivers/hsi/controllers/omap_ssi_port.c
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Diffstat (limited to 'drivers/hsi/controllers/omap_ssi_port.c')
-rw-r--r--drivers/hsi/controllers/omap_ssi_port.c64
1 files changed, 13 insertions, 51 deletions
diff --git a/drivers/hsi/controllers/omap_ssi_port.c b/drivers/hsi/controllers/omap_ssi_port.c
index b2b3989ccfd2..50dde968febe 100644
--- a/drivers/hsi/controllers/omap_ssi_port.c
+++ b/drivers/hsi/controllers/omap_ssi_port.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/* OMAP SSI port driver.
*
* Copyright (C) 2010 Nokia Corporation. All rights reserved.
* Copyright (C) 2014 Sebastian Reichel <sre@kernel.org>
*
* Contact: Carlos Chinea <carlos.chinea@nokia.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
*/
#include <linux/mod_devicetable.h>
@@ -162,25 +149,19 @@ static int ssi_div_set(void *data, u64 val)
return 0;
}
-DEFINE_SIMPLE_ATTRIBUTE(ssi_sst_div_fops, ssi_div_get, ssi_div_set, "%llu\n");
+DEFINE_DEBUGFS_ATTRIBUTE(ssi_sst_div_fops, ssi_div_get, ssi_div_set, "%llu\n");
-static int ssi_debug_add_port(struct omap_ssi_port *omap_port,
+static void ssi_debug_add_port(struct omap_ssi_port *omap_port,
struct dentry *dir)
{
struct hsi_port *port = to_hsi_port(omap_port->dev);
dir = debugfs_create_dir(dev_name(omap_port->dev), dir);
- if (!dir)
- return -ENOMEM;
omap_port->dir = dir;
debugfs_create_file("regs", S_IRUGO, dir, port, &ssi_port_regs_fops);
dir = debugfs_create_dir("sst", dir);
- if (!dir)
- return -ENOMEM;
- debugfs_create_file("divisor", S_IRUGO | S_IWUSR, dir, port,
- &ssi_sst_div_fops);
-
- return 0;
+ debugfs_create_file_unsafe("divisor", 0644, dir, port,
+ &ssi_sst_div_fops);
}
#endif
@@ -243,10 +224,10 @@ static int ssi_start_dma(struct hsi_msg *msg, int lch)
if (msg->ttype == HSI_MSG_READ) {
err = dma_map_sg(&ssi->device, msg->sgt.sgl, msg->sgt.nents,
DMA_FROM_DEVICE);
- if (err < 0) {
+ if (!err) {
dev_dbg(&ssi->device, "DMA map SG failed !\n");
pm_runtime_put_autosuspend(omap_port->pdev);
- return err;
+ return -EIO;
}
csdp = SSI_DST_BURST_4x32_BIT | SSI_DST_MEMORY_PORT |
SSI_SRC_SINGLE_ACCESS0 | SSI_SRC_PERIPHERAL_PORT |
@@ -260,10 +241,10 @@ static int ssi_start_dma(struct hsi_msg *msg, int lch)
} else {
err = dma_map_sg(&ssi->device, msg->sgt.sgl, msg->sgt.nents,
DMA_TO_DEVICE);
- if (err < 0) {
+ if (!err) {
dev_dbg(&ssi->device, "DMA map SG failed !\n");
pm_runtime_put_autosuspend(omap_port->pdev);
- return err;
+ return -EIO;
}
csdp = SSI_SRC_BURST_4x32_BIT | SSI_SRC_MEMORY_PORT |
SSI_DST_SINGLE_ACCESS0 | SSI_DST_PERIPHERAL_PORT |
@@ -381,7 +362,6 @@ static int ssi_async_break(struct hsi_msg *msg)
spin_unlock_bh(&omap_port->lock);
}
out:
- pm_runtime_mark_last_busy(omap_port->pdev);
pm_runtime_put_autosuspend(omap_port->pdev);
return err;
@@ -420,7 +400,6 @@ static int ssi_async(struct hsi_msg *msg)
msg->status = HSI_STATUS_ERROR;
}
spin_unlock_bh(&omap_port->lock);
- pm_runtime_mark_last_busy(omap_port->pdev);
pm_runtime_put_autosuspend(omap_port->pdev);
dev_dbg(&port->device, "msg status %d ttype %d ch %d\n",
msg->status, msg->ttype, msg->channel);
@@ -523,7 +502,6 @@ static int ssi_setup(struct hsi_client *cl)
omap_port->ssr.mode = cl->rx_cfg.mode;
out:
spin_unlock_bh(&omap_port->lock);
- pm_runtime_mark_last_busy(omap_port->pdev);
pm_runtime_put_autosuspend(omap_port->pdev);
return err;
@@ -589,7 +567,6 @@ static int ssi_flush(struct hsi_client *cl)
pinctrl_pm_select_default_state(omap_port->pdev);
spin_unlock_bh(&omap_port->lock);
- pm_runtime_mark_last_busy(omap_port->pdev);
pm_runtime_put_autosuspend(omap_port->pdev);
return 0;
@@ -644,7 +621,6 @@ static int ssi_stop_tx(struct hsi_client *cl)
writel(SSI_WAKE(0), omap_ssi->sys + SSI_CLEAR_WAKE_REG(port->num));
spin_unlock_bh(&omap_port->wk_lock);
- pm_runtime_mark_last_busy(omap_port->pdev);
pm_runtime_put_autosuspend(omap_port->pdev); /* Release clocks */
@@ -672,7 +648,6 @@ static void ssi_transfer(struct omap_ssi_port *omap_port,
}
}
spin_unlock_bh(&omap_port->lock);
- pm_runtime_mark_last_busy(omap_port->pdev);
pm_runtime_put_autosuspend(omap_port->pdev);
}
@@ -702,7 +677,6 @@ static void ssi_cleanup_queues(struct hsi_client *cl)
txbufstate |= (1 << i);
status |= SSI_DATAACCEPT(i);
/* Release the clocks writes, also GDD ones */
- pm_runtime_mark_last_busy(omap_port->pdev);
pm_runtime_put_autosuspend(omap_port->pdev);
}
ssi_flush_queue(&omap_port->txqueue[i], cl);
@@ -758,7 +732,6 @@ static void ssi_cleanup_gdd(struct hsi_controller *ssi, struct hsi_client *cl)
* ssi_cleanup_queues
*/
if (msg->ttype == HSI_MSG_READ) {
- pm_runtime_mark_last_busy(omap_port->pdev);
pm_runtime_put_autosuspend(omap_port->pdev);
}
omap_ssi->gdd_trn[i].msg = NULL;
@@ -955,7 +928,6 @@ static void ssi_pio_complete(struct hsi_port *port, struct list_head *queue)
reg = readl(omap_ssi->sys + SSI_MPU_ENABLE_REG(port->num, 0));
if (msg->ttype == HSI_MSG_WRITE) {
/* Release clocks for write transfer */
- pm_runtime_mark_last_busy(omap_port->pdev);
pm_runtime_put_autosuspend(omap_port->pdev);
}
reg &= ~val;
@@ -1000,7 +972,6 @@ static irqreturn_t ssi_pio_thread(int irq, void *ssi_port)
/* TODO: sleep if we retry? */
} while (status_reg);
- pm_runtime_mark_last_busy(omap_port->pdev);
pm_runtime_put_autosuspend(omap_port->pdev);
return IRQ_HANDLED;
@@ -1037,7 +1008,6 @@ static irqreturn_t ssi_wake_thread(int irq __maybe_unused, void *ssi_port)
}
hsi_event(port, HSI_EVENT_STOP_RX);
if (test_and_clear_bit(SSI_WAKE_EN, &omap_port->flags)) {
- pm_runtime_mark_last_busy(omap_port->pdev);
pm_runtime_put_autosuspend(omap_port->pdev);
}
}
@@ -1051,10 +1021,8 @@ static int ssi_port_irq(struct hsi_port *port, struct platform_device *pd)
int err;
err = platform_get_irq(pd, 0);
- if (err < 0) {
- dev_err(&port->device, "Port IRQ resource missing\n");
+ if (err < 0)
return err;
- }
omap_port->irq = err;
err = devm_request_threaded_irq(&port->device, omap_port->irq, NULL,
ssi_pio_thread, IRQF_ONESHOT, "SSI PORT", port);
@@ -1232,11 +1200,7 @@ static int ssi_port_probe(struct platform_device *pd)
pm_runtime_enable(omap_port->pdev);
#ifdef CONFIG_DEBUG_FS
- err = ssi_debug_add_port(omap_port, omap_ssi->dir);
- if (err < 0) {
- pm_runtime_disable(omap_port->pdev);
- goto error;
- }
+ ssi_debug_add_port(omap_port, omap_ssi->dir);
#endif
hsi_add_clients_from_dt(port, np);
@@ -1249,7 +1213,7 @@ error:
return err;
}
-static int ssi_port_remove(struct platform_device *pd)
+static void ssi_port_remove(struct platform_device *pd)
{
struct hsi_port *port = platform_get_drvdata(pd);
struct omap_ssi_port *omap_port = hsi_port_drvdata(port);
@@ -1276,8 +1240,6 @@ static int ssi_port_remove(struct platform_device *pd)
pm_runtime_dont_use_autosuspend(&pd->dev);
pm_runtime_disable(&pd->dev);
-
- return 0;
}
static int ssi_restore_divisor(struct omap_ssi_port *omap_port)
@@ -1412,7 +1374,7 @@ MODULE_DEVICE_TABLE(of, omap_ssi_port_of_match);
struct platform_driver ssi_port_pdriver = {
.probe = ssi_port_probe,
- .remove = ssi_port_remove,
+ .remove = ssi_port_remove,
.driver = {
.name = "omap_ssi_port",
.of_match_table = omap_ssi_port_of_match,
generated by cgit (git 2.34.1) at 2025-12-25 17:28:51 +0000