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Message-Id: <20230417-ux500-dma40-cleanup-v1-4-b26324956e47@linaro.org>
Date: Mon, 17 Apr 2023 09:55:49 +0200
From: Linus Walleij <linus.walleij@...aro.org>
To: Vinod Koul <vkoul@...nel.org>, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc: dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 4/7] dmaengine: ste_dma40: Remove platform data
The Ux500 is device tree-only since ages. Delete the
platform data header and push it into or next to the driver
instead.
Drop the non-DT probe path since this will not happen.
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
drivers/dma/ste_dma40.c | 56 ++++++++----
.../dma-ste-dma40.h => drivers/dma/ste_dma40.h | 101 +--------------------
drivers/dma/ste_dma40_ll.c | 3 +-
3 files changed, 41 insertions(+), 119 deletions(-)
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index ef2a2fdaa82e..e5df28cdc4c8 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -23,11 +23,39 @@
#include <linux/of_dma.h>
#include <linux/amba/bus.h>
#include <linux/regulator/consumer.h>
-#include <linux/platform_data/dma-ste-dma40.h>
#include "dmaengine.h"
+#include "ste_dma40.h"
#include "ste_dma40_ll.h"
+/**
+ * struct stedma40_platform_data - Configuration struct for the dma device.
+ *
+ * @dev_tx: mapping between destination event line and io address
+ * @dev_rx: mapping between source event line and io address
+ * @disabled_channels: A vector, ending with -1, that marks physical channels
+ * that are for different reasons not available for the driver.
+ * @soft_lli_chans: A vector, that marks physical channels will use LLI by SW
+ * which avoids HW bug that exists in some versions of the controller.
+ * SoftLLI introduces relink overhead that could impact performace for
+ * certain use cases.
+ * @num_of_soft_lli_chans: The number of channels that needs to be configured
+ * to use SoftLLI.
+ * @use_esram_lcla: flag for mapping the lcla into esram region
+ * @num_of_memcpy_chans: The number of channels reserved for memcpy.
+ * @num_of_phy_chans: The number of physical channels implemented in HW.
+ * 0 means reading the number of channels from DMA HW but this is only valid
+ * for 'multiple of 4' channels, like 8.
+ */
+struct stedma40_platform_data {
+ int disabled_channels[STEDMA40_MAX_PHYS];
+ int *soft_lli_chans;
+ int num_of_soft_lli_chans;
+ bool use_esram_lcla;
+ int num_of_memcpy_chans;
+ int num_of_phy_chans;
+};
+
#define D40_NAME "dma40"
#define D40_PHY_CHAN -1
@@ -2269,7 +2297,7 @@ d40_prep_sg(struct dma_chan *dchan, struct scatterlist *sg_src,
return NULL;
}
-bool stedma40_filter(struct dma_chan *chan, void *data)
+static bool stedma40_filter(struct dma_chan *chan, void *data)
{
struct stedma40_chan_cfg *info = data;
struct d40_chan *d40c =
@@ -2288,7 +2316,6 @@ bool stedma40_filter(struct dma_chan *chan, void *data)
return err == 0;
}
-EXPORT_SYMBOL(stedma40_filter);
static void __d40_set_prio_rt(struct d40_chan *d40c, int dev_type, bool src)
{
@@ -3517,16 +3544,9 @@ static int __init d40_probe(struct platform_device *pdev)
int num_reserved_chans;
u32 val;
- if (!plat_data) {
- if (np) {
- if (d40_of_probe(pdev, np)) {
- ret = -ENOMEM;
- goto report_failure;
- }
- } else {
- d40_err(dev, "No pdata or Device Tree provided\n");
- goto report_failure;
- }
+ if (d40_of_probe(pdev, np)) {
+ ret = -ENOMEM;
+ goto report_failure;
}
base = d40_hw_detect_init(pdev);
@@ -3650,11 +3670,11 @@ static int __init d40_probe(struct platform_device *pdev)
d40_hw_init(base);
- if (np) {
- ret = of_dma_controller_register(np, d40_xlate, NULL);
- if (ret)
- dev_err(dev,
- "could not register of_dma_controller\n");
+ ret = of_dma_controller_register(np, d40_xlate, NULL);
+ if (ret) {
+ dev_err(dev,
+ "could not register of_dma_controller\n");
+ goto destroy_cache;
}
dev_info(base->dev, "initialized\n");
diff --git a/include/linux/platform_data/dma-ste-dma40.h b/drivers/dma/ste_dma40.h
similarity index 51%
rename from include/linux/platform_data/dma-ste-dma40.h
rename to drivers/dma/ste_dma40.h
index 10641633facc..c697bfe16a01 100644
--- a/include/linux/platform_data/dma-ste-dma40.h
+++ b/drivers/dma/ste_dma40.h
@@ -1,19 +1,8 @@
/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (C) ST-Ericsson SA 2007-2010
- * Author: Per Forlin <per.forlin@...ricsson.com> for ST-Ericsson
- * Author: Jonas Aaberg <jonas.aberg@...ricsson.com> for ST-Ericsson
- */
-
#ifndef STE_DMA40_H
#define STE_DMA40_H
-#include <linux/dmaengine.h>
-#include <linux/scatterlist.h>
-#include <linux/workqueue.h>
-#include <linux/interrupt.h>
-
/*
* Maxium size for a single dma descriptor
* Size is limited to 16 bits.
@@ -118,92 +107,4 @@ struct stedma40_chan_cfg {
int phy_channel;
};
-/**
- * struct stedma40_platform_data - Configuration struct for the dma device.
- *
- * @dev_tx: mapping between destination event line and io address
- * @dev_rx: mapping between source event line and io address
- * @disabled_channels: A vector, ending with -1, that marks physical channels
- * that are for different reasons not available for the driver.
- * @soft_lli_chans: A vector, that marks physical channels will use LLI by SW
- * which avoids HW bug that exists in some versions of the controller.
- * SoftLLI introduces relink overhead that could impact performace for
- * certain use cases.
- * @num_of_soft_lli_chans: The number of channels that needs to be configured
- * to use SoftLLI.
- * @use_esram_lcla: flag for mapping the lcla into esram region
- * @num_of_memcpy_chans: The number of channels reserved for memcpy.
- * @num_of_phy_chans: The number of physical channels implemented in HW.
- * 0 means reading the number of channels from DMA HW but this is only valid
- * for 'multiple of 4' channels, like 8.
- */
-struct stedma40_platform_data {
- int disabled_channels[STEDMA40_MAX_PHYS];
- int *soft_lli_chans;
- int num_of_soft_lli_chans;
- bool use_esram_lcla;
- int num_of_memcpy_chans;
- int num_of_phy_chans;
-};
-
-#ifdef CONFIG_STE_DMA40
-
-/**
- * stedma40_filter() - Provides stedma40_chan_cfg to the
- * ste_dma40 dma driver via the dmaengine framework.
- * does some checking of what's provided.
- *
- * Never directly called by client. It used by dmaengine.
- * @chan: dmaengine handle.
- * @data: Must be of type: struct stedma40_chan_cfg and is
- * the configuration of the framework.
- *
- *
- */
-
-bool stedma40_filter(struct dma_chan *chan, void *data);
-
-/**
- * stedma40_slave_mem() - Transfers a raw data buffer to or from a slave
- * (=device)
- *
- * @chan: dmaengine handle
- * @addr: source or destination physicall address.
- * @size: bytes to transfer
- * @direction: direction of transfer
- * @flags: is actually enum dma_ctrl_flags. See dmaengine.h
- */
-
-static inline struct
-dma_async_tx_descriptor *stedma40_slave_mem(struct dma_chan *chan,
- dma_addr_t addr,
- unsigned int size,
- enum dma_transfer_direction direction,
- unsigned long flags)
-{
- struct scatterlist sg;
- sg_init_table(&sg, 1);
- sg.dma_address = addr;
- sg.length = size;
-
- return dmaengine_prep_slave_sg(chan, &sg, 1, direction, flags);
-}
-
-#else
-static inline bool stedma40_filter(struct dma_chan *chan, void *data)
-{
- return false;
-}
-
-static inline struct
-dma_async_tx_descriptor *stedma40_slave_mem(struct dma_chan *chan,
- dma_addr_t addr,
- unsigned int size,
- enum dma_transfer_direction direction,
- unsigned long flags)
-{
- return NULL;
-}
-#endif
-
-#endif
+#endif /* STE_DMA40_H */
diff --git a/drivers/dma/ste_dma40_ll.c b/drivers/dma/ste_dma40_ll.c
index b5287c661eb7..4c489b126cb2 100644
--- a/drivers/dma/ste_dma40_ll.c
+++ b/drivers/dma/ste_dma40_ll.c
@@ -6,8 +6,9 @@
*/
#include <linux/kernel.h>
-#include <linux/platform_data/dma-ste-dma40.h>
+#include <linux/dmaengine.h>
+#include "ste_dma40.h"
#include "ste_dma40_ll.h"
static u8 d40_width_to_bits(enum dma_slave_buswidth width)
--
2.39.2
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