+++ /dev/null
-From 1f58a1e1402d42eb2cb5790ce0bfb5f9f73daa42 Mon Sep 17 00:00:00 2001
-From: Walker Chen <walker.chen@starfivetech.com>
-Date: Wed, 22 Mar 2023 17:48:18 +0800
-Subject: [PATCH 108/111] dmaengine: dw-axi-dmac: Add support for StarFive
- JH7110 DMA
-
-Add DMA reset operation in device probe and use different configuration
-on CH_CFG registers according to match data. Update all uses of
-of_device_is_compatible with of_device_get_match_data.
-
-Signed-off-by: Walker Chen <walker.chen@starfivetech.com>
-Reviewed-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
----
- .../dma/dw-axi-dmac/dw-axi-dmac-platform.c | 38 ++++++++++++++++---
- drivers/dma/dw-axi-dmac/dw-axi-dmac.h | 1 +
- 2 files changed, 34 insertions(+), 5 deletions(-)
-
-diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
-index 4169e1d7d5ca..6cfcb541d8c3 100644
---- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
-+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
-@@ -21,10 +21,12 @@
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/of.h>
-+#include <linux/of_device.h>
- #include <linux/of_dma.h>
- #include <linux/platform_device.h>
- #include <linux/pm_runtime.h>
- #include <linux/property.h>
-+#include <linux/reset.h>
- #include <linux/slab.h>
- #include <linux/types.h>
-
-@@ -46,6 +48,10 @@
- DMA_SLAVE_BUSWIDTH_32_BYTES | \
- DMA_SLAVE_BUSWIDTH_64_BYTES)
-
-+#define AXI_DMA_FLAG_HAS_APB_REGS BIT(0)
-+#define AXI_DMA_FLAG_HAS_RESETS BIT(1)
-+#define AXI_DMA_FLAG_USE_CFG2 BIT(2)
-+
- static inline void
- axi_dma_iowrite32(struct axi_dma_chip *chip, u32 reg, u32 val)
- {
-@@ -86,7 +92,8 @@ static inline void axi_chan_config_write(struct axi_dma_chan *chan,
-
- cfg_lo = (config->dst_multblk_type << CH_CFG_L_DST_MULTBLK_TYPE_POS |
- config->src_multblk_type << CH_CFG_L_SRC_MULTBLK_TYPE_POS);
-- if (chan->chip->dw->hdata->reg_map_8_channels) {
-+ if (chan->chip->dw->hdata->reg_map_8_channels &&
-+ !chan->chip->dw->hdata->use_cfg2) {
- cfg_hi = config->tt_fc << CH_CFG_H_TT_FC_POS |
- config->hs_sel_src << CH_CFG_H_HS_SEL_SRC_POS |
- config->hs_sel_dst << CH_CFG_H_HS_SEL_DST_POS |
-@@ -1367,10 +1374,11 @@ static int parse_device_properties(struct axi_dma_chip *chip)
-
- static int dw_probe(struct platform_device *pdev)
- {
-- struct device_node *node = pdev->dev.of_node;
- struct axi_dma_chip *chip;
- struct dw_axi_dma *dw;
- struct dw_axi_dma_hcfg *hdata;
-+ struct reset_control *resets;
-+ unsigned int flags;
- u32 i;
- int ret;
-
-@@ -1398,12 +1406,25 @@ static int dw_probe(struct platform_device *pdev)
- if (IS_ERR(chip->regs))
- return PTR_ERR(chip->regs);
-
-- if (of_device_is_compatible(node, "intel,kmb-axi-dma")) {
-+ flags = (uintptr_t)of_device_get_match_data(&pdev->dev);
-+ if (flags & AXI_DMA_FLAG_HAS_APB_REGS) {
- chip->apb_regs = devm_platform_ioremap_resource(pdev, 1);
- if (IS_ERR(chip->apb_regs))
- return PTR_ERR(chip->apb_regs);
- }
-
-+ if (flags & AXI_DMA_FLAG_HAS_RESETS) {
-+ resets = devm_reset_control_array_get_exclusive(&pdev->dev);
-+ if (IS_ERR(resets))
-+ return PTR_ERR(resets);
-+
-+ ret = reset_control_deassert(resets);
-+ if (ret)
-+ return ret;
-+ }
-+
-+ chip->dw->hdata->use_cfg2 = !!(flags & AXI_DMA_FLAG_USE_CFG2);
-+
- chip->core_clk = devm_clk_get(chip->dev, "core-clk");
- if (IS_ERR(chip->core_clk))
- return PTR_ERR(chip->core_clk);
-@@ -1554,8 +1575,15 @@ static const struct dev_pm_ops dw_axi_dma_pm_ops = {
- };
-
- static const struct of_device_id dw_dma_of_id_table[] = {
-- { .compatible = "snps,axi-dma-1.01a" },
-- { .compatible = "intel,kmb-axi-dma" },
-+ {
-+ .compatible = "snps,axi-dma-1.01a"
-+ }, {
-+ .compatible = "intel,kmb-axi-dma",
-+ .data = (void *)AXI_DMA_FLAG_HAS_APB_REGS,
-+ }, {
-+ .compatible = "starfive,jh7110-axi-dma",
-+ .data = (void *)(AXI_DMA_FLAG_HAS_RESETS | AXI_DMA_FLAG_USE_CFG2),
-+ },
- {}
- };
- MODULE_DEVICE_TABLE(of, dw_dma_of_id_table);
-diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
-index e9d5eb0fd594..eb267cb24f67 100644
---- a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
-+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
-@@ -33,6 +33,7 @@ struct dw_axi_dma_hcfg {
- /* Register map for DMAX_NUM_CHANNELS <= 8 */
- bool reg_map_8_channels;
- bool restrict_axi_burst_len;
-+ bool use_cfg2;
- };
-
- struct axi_dma_chan {
---
-2.20.1
-