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Message-Id: <20240617-ep93xx-v10-38-662e640ed811@maquefel.me>
Date: Mon, 17 Jun 2024 12:37:12 +0300
From: Nikita Shubin via B4 Relay <devnull+nikita.shubin.maquefel.me@...nel.org>
To: Vinod Koul <vkoul@...nel.org>,
Nikita Shubin <nikita.shubin@...uefel.me>,
Alexander Sverdlin <alexander.sverdlin@...il.com>
Cc: linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org,
Arnd Bergmann <arnd@...db.de>
Subject: [PATCH v10 38/38] dmaengine: cirrus: remove platform code
From: Nikita Shubin <nikita.shubin@...uefel.me>
Remove DMA platform header, from now on we use device tree for DMA
clients.
Signed-off-by: Nikita Shubin <nikita.shubin@...uefel.me>
---
drivers/dma/ep93xx_dma.c | 48 ++++++++++++++-
include/linux/platform_data/dma-ep93xx.h | 100 -------------------------------
2 files changed, 46 insertions(+), 102 deletions(-)
diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c
index 17c8e2badee2..43c4241af7f5 100644
--- a/drivers/dma/ep93xx_dma.c
+++ b/drivers/dma/ep93xx_dma.c
@@ -17,6 +17,7 @@
#include <linux/clk.h>
#include <linux/init.h>
#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
@@ -25,8 +26,6 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
-#include <linux/platform_data/dma-ep93xx.h>
-
#include "dmaengine.h"
/* M2P registers */
@@ -106,6 +105,26 @@
#define DMA_MAX_CHAN_BYTES 0xffff
#define DMA_MAX_CHAN_DESCRIPTORS 32
+/*
+ * M2P channels.
+ *
+ * Note that these values are also directly used for setting the PPALLOC
+ * register.
+ */
+#define EP93XX_DMA_I2S1 0
+#define EP93XX_DMA_I2S2 1
+#define EP93XX_DMA_AAC1 2
+#define EP93XX_DMA_AAC2 3
+#define EP93XX_DMA_AAC3 4
+#define EP93XX_DMA_I2S3 5
+#define EP93XX_DMA_UART1 6
+#define EP93XX_DMA_UART2 7
+#define EP93XX_DMA_UART3 8
+#define EP93XX_DMA_IRDA 9
+/* M2M channels */
+#define EP93XX_DMA_SSP 10
+#define EP93XX_DMA_IDE 11
+
enum ep93xx_dma_type {
M2P_DMA,
M2M_DMA,
@@ -242,6 +261,31 @@ static struct ep93xx_dma_chan *to_ep93xx_dma_chan(struct dma_chan *chan)
return container_of(chan, struct ep93xx_dma_chan, chan);
}
+static inline bool ep93xx_dma_chan_is_m2p(struct dma_chan *chan)
+{
+ if (device_is_compatible(chan->device->dev, "cirrus,ep9301-dma-m2p"))
+ return true;
+
+ return !strcmp(dev_name(chan->device->dev), "ep93xx-dma-m2p");
+}
+
+/*
+ * ep93xx_dma_chan_direction - returns direction the channel can be used
+ *
+ * This function can be used in filter functions to find out whether the
+ * channel supports given DMA direction. Only M2P channels have such
+ * limitation, for M2M channels the direction is configurable.
+ */
+static inline enum dma_transfer_direction
+ep93xx_dma_chan_direction(struct dma_chan *chan)
+{
+ if (!ep93xx_dma_chan_is_m2p(chan))
+ return DMA_TRANS_NONE;
+
+ /* even channels are for TX, odd for RX */
+ return (chan->chan_id % 2 == 0) ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
+}
+
/**
* ep93xx_dma_set_active - set new active descriptor chain
* @edmac: channel
diff --git a/include/linux/platform_data/dma-ep93xx.h b/include/linux/platform_data/dma-ep93xx.h
deleted file mode 100644
index 9ec5cdd5a1eb..000000000000
--- a/include/linux/platform_data/dma-ep93xx.h
+++ /dev/null
@@ -1,100 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ASM_ARCH_DMA_H
-#define __ASM_ARCH_DMA_H
-
-#include <linux/types.h>
-#include <linux/device.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-mapping.h>
-#include <linux/property.h>
-#include <linux/string.h>
-
-/*
- * M2P channels.
- *
- * Note that these values are also directly used for setting the PPALLOC
- * register.
- */
-#define EP93XX_DMA_I2S1 0
-#define EP93XX_DMA_I2S2 1
-#define EP93XX_DMA_AAC1 2
-#define EP93XX_DMA_AAC2 3
-#define EP93XX_DMA_AAC3 4
-#define EP93XX_DMA_I2S3 5
-#define EP93XX_DMA_UART1 6
-#define EP93XX_DMA_UART2 7
-#define EP93XX_DMA_UART3 8
-#define EP93XX_DMA_IRDA 9
-/* M2M channels */
-#define EP93XX_DMA_SSP 10
-#define EP93XX_DMA_IDE 11
-
-/**
- * struct ep93xx_dma_data - configuration data for the EP93xx dmaengine
- * @port: peripheral which is requesting the channel
- * @direction: TX/RX channel
- * @name: optional name for the channel, this is displayed in /proc/interrupts
- *
- * This information is passed as private channel parameter in a filter
- * function. Note that this is only needed for slave/cyclic channels. For
- * memcpy channels %NULL data should be passed.
- */
-struct ep93xx_dma_data {
- int port;
- enum dma_transfer_direction direction;
- const char *name;
-};
-
-/**
- * struct ep93xx_dma_chan_data - platform specific data for a DMA channel
- * @name: name of the channel, used for getting the right clock for the channel
- * @base: mapped registers
- * @irq: interrupt number used by this channel
- */
-struct ep93xx_dma_chan_data {
- const char *name;
- void __iomem *base;
- int irq;
-};
-
-/**
- * struct ep93xx_dma_platform_data - platform data for the dmaengine driver
- * @channels: array of channels which are passed to the driver
- * @num_channels: number of channels in the array
- *
- * This structure is passed to the DMA engine driver via platform data. For
- * M2P channels, contract is that even channels are for TX and odd for RX.
- * There is no requirement for the M2M channels.
- */
-struct ep93xx_dma_platform_data {
- struct ep93xx_dma_chan_data *channels;
- size_t num_channels;
-};
-
-static inline bool ep93xx_dma_chan_is_m2p(struct dma_chan *chan)
-{
- if (device_is_compatible(chan->device->dev, "cirrus,ep9301-dma-m2p"))
- return true;
-
- return !strcmp(dev_name(chan->device->dev), "ep93xx-dma-m2p");
-}
-
-/**
- * ep93xx_dma_chan_direction - returns direction the channel can be used
- * @chan: channel
- *
- * This function can be used in filter functions to find out whether the
- * channel supports given DMA direction. Only M2P channels have such
- * limitation, for M2M channels the direction is configurable.
- */
-static inline enum dma_transfer_direction
-ep93xx_dma_chan_direction(struct dma_chan *chan)
-{
- if (!ep93xx_dma_chan_is_m2p(chan))
- return DMA_TRANS_NONE;
-
- /* even channels are for TX, odd for RX */
- return (chan->chan_id % 2 == 0) ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
-}
-
-#endif /* __ASM_ARCH_DMA_H */
--
2.43.2
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