diff options
Diffstat (limited to 'target/linux/layerscape/patches-4.14/804-i2c-support-layerscape.patch')
| -rw-r--r-- | target/linux/layerscape/patches-4.14/804-i2c-support-layerscape.patch | 151 |
1 files changed, 140 insertions, 11 deletions
diff --git a/target/linux/layerscape/patches-4.14/804-i2c-support-layerscape.patch b/target/linux/layerscape/patches-4.14/804-i2c-support-layerscape.patch index 820f384af4..e0dbffe303 100644 --- a/target/linux/layerscape/patches-4.14/804-i2c-support-layerscape.patch +++ b/target/linux/layerscape/patches-4.14/804-i2c-support-layerscape.patch @@ -1,15 +1,19 @@ -From 4f22b58a2f809aff55aa9321c9100b0caf3b6694 Mon Sep 17 00:00:00 2001 +From 3f7d59061c38287bdc2fec2e94b4df9e6e62dbc6 Mon Sep 17 00:00:00 2001 From: Biwen Li <biwen.li@nxp.com> -Date: Tue, 30 Oct 2018 18:26:36 +0800 -Subject: [PATCH 21/40] i2c: support layerscape +Date: Wed, 17 Apr 2019 18:58:39 +0800 +Subject: [PATCH] i2c: support layerscape + This is an integrated patch of i2c for layerscape -Signed-off-by: Zhang Ying-22455 <ying.zhang22455@nxp.com> Signed-off-by: Biwen Li <biwen.li@nxp.com> +Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> +Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> +Signed-off-by: Wolfram Sang <wsa@the-dreams.de> +Signed-off-by: Zhang Ying-22455 <ying.zhang22455@nxp.com> --- - drivers/i2c/busses/i2c-imx.c | 193 ++++++++++++++++++++++++++++ - drivers/i2c/muxes/i2c-mux-pca954x.c | 44 ++++++- - 2 files changed, 236 insertions(+), 1 deletion(-) + drivers/i2c/busses/i2c-imx.c | 245 +++++++++++++++++++++++++--- + drivers/i2c/muxes/i2c-mux-pca954x.c | 44 ++++- + 2 files changed, 268 insertions(+), 21 deletions(-) --- a/drivers/i2c/busses/i2c-imx.c +++ b/drivers/i2c/busses/i2c-imx.c @@ -93,7 +97,84 @@ Signed-off-by: Biwen Li <biwen.li@nxp.com> }; static const struct imx_i2c_hwdata imx1_i2c_hwdata = { -@@ -878,6 +937,78 @@ static int i2c_imx_read(struct imx_i2c_s +@@ -281,8 +340,8 @@ static inline unsigned char imx_i2c_read + } + + /* Functions for DMA support */ +-static void i2c_imx_dma_request(struct imx_i2c_struct *i2c_imx, +- dma_addr_t phy_addr) ++static int i2c_imx_dma_request(struct imx_i2c_struct *i2c_imx, ++ dma_addr_t phy_addr) + { + struct imx_i2c_dma *dma; + struct dma_slave_config dma_sconfig; +@@ -291,11 +350,13 @@ static void i2c_imx_dma_request(struct i + + dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL); + if (!dma) +- return; ++ return -ENOMEM; + +- dma->chan_tx = dma_request_slave_channel(dev, "tx"); +- if (!dma->chan_tx) { +- dev_dbg(dev, "can't request DMA tx channel\n"); ++ dma->chan_tx = dma_request_chan(dev, "tx"); ++ if (IS_ERR(dma->chan_tx)) { ++ ret = PTR_ERR(dma->chan_tx); ++ if (ret != -ENODEV && ret != -EPROBE_DEFER) ++ dev_err(dev, "can't request DMA tx channel (%d)\n", ret); + goto fail_al; + } + +@@ -306,13 +367,15 @@ static void i2c_imx_dma_request(struct i + dma_sconfig.direction = DMA_MEM_TO_DEV; + ret = dmaengine_slave_config(dma->chan_tx, &dma_sconfig); + if (ret < 0) { +- dev_dbg(dev, "can't configure tx channel\n"); ++ dev_err(dev, "can't configure tx channel (%d)\n", ret); + goto fail_tx; + } + +- dma->chan_rx = dma_request_slave_channel(dev, "rx"); +- if (!dma->chan_rx) { +- dev_dbg(dev, "can't request DMA rx channel\n"); ++ dma->chan_rx = dma_request_chan(dev, "rx"); ++ if (IS_ERR(dma->chan_rx)) { ++ ret = PTR_ERR(dma->chan_rx); ++ if (ret != -ENODEV && ret != -EPROBE_DEFER) ++ dev_err(dev, "can't request DMA rx channel (%d)\n", ret); + goto fail_tx; + } + +@@ -323,7 +386,7 @@ static void i2c_imx_dma_request(struct i + dma_sconfig.direction = DMA_DEV_TO_MEM; + ret = dmaengine_slave_config(dma->chan_rx, &dma_sconfig); + if (ret < 0) { +- dev_dbg(dev, "can't configure rx channel\n"); ++ dev_err(dev, "can't configure rx channel (%d)\n", ret); + goto fail_rx; + } + +@@ -332,7 +395,7 @@ static void i2c_imx_dma_request(struct i + dev_info(dev, "using %s (tx) and %s (rx) for DMA transfers\n", + dma_chan_name(dma->chan_tx), dma_chan_name(dma->chan_rx)); + +- return; ++ return 0; + + fail_rx: + dma_release_channel(dma->chan_rx); +@@ -340,7 +403,8 @@ fail_tx: + dma_release_channel(dma->chan_tx); + fail_al: + devm_kfree(dev, dma); +- dev_info(dev, "can't use DMA, using PIO instead.\n"); ++ /* return successfully if there is no dma support */ ++ return ret == -ENODEV ? 0 : ret; + } + + static void i2c_imx_dma_callback(void *arg) +@@ -878,6 +942,78 @@ static int i2c_imx_read(struct imx_i2c_s return 0; } @@ -172,7 +253,7 @@ Signed-off-by: Biwen Li <biwen.li@nxp.com> static int i2c_imx_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, int num) { -@@ -888,6 +1019,19 @@ static int i2c_imx_xfer(struct i2c_adapt +@@ -888,6 +1024,19 @@ static int i2c_imx_xfer(struct i2c_adapt dev_dbg(&i2c_imx->adapter.dev, "<%s>\n", __func__); @@ -192,7 +273,7 @@ Signed-off-by: Biwen Li <biwen.li@nxp.com> result = pm_runtime_get_sync(i2c_imx->adapter.dev.parent); if (result < 0) goto out; -@@ -1030,6 +1174,50 @@ static int i2c_imx_init_recovery_info(st +@@ -1030,6 +1179,50 @@ static int i2c_imx_init_recovery_info(st return 0; } @@ -243,7 +324,7 @@ Signed-off-by: Biwen Li <biwen.li@nxp.com> static u32 i2c_imx_func(struct i2c_adapter *adapter) { return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL -@@ -1085,6 +1273,11 @@ static int i2c_imx_probe(struct platform +@@ -1085,6 +1278,11 @@ static int i2c_imx_probe(struct platform i2c_imx->adapter.dev.of_node = pdev->dev.of_node; i2c_imx->base = base; @@ -255,6 +336,54 @@ Signed-off-by: Biwen Li <biwen.li@nxp.com> /* Get I2C clock */ i2c_imx->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(i2c_imx->clk)) { +@@ -1103,7 +1301,8 @@ static int i2c_imx_probe(struct platform + pdev->name, i2c_imx); + if (ret) { + dev_err(&pdev->dev, "can't claim irq %d\n", irq); +- goto clk_disable; ++ clk_disable_unprepare(i2c_imx->clk); ++ return ret; + } + + /* Init queue */ +@@ -1150,25 +1349,31 @@ static int i2c_imx_probe(struct platform + pm_runtime_mark_last_busy(&pdev->dev); + pm_runtime_put_autosuspend(&pdev->dev); + ++ /* Init DMA config if supported */ ++ ret = i2c_imx_dma_request(i2c_imx, phy_addr); ++ if (ret) { ++ if (ret != -EPROBE_DEFER) ++ dev_info(&pdev->dev, "can't use DMA, using PIO instead.\n"); ++ else ++ goto del_adapter; ++ } ++ + dev_dbg(&i2c_imx->adapter.dev, "claimed irq %d\n", irq); + dev_dbg(&i2c_imx->adapter.dev, "device resources: %pR\n", res); + dev_dbg(&i2c_imx->adapter.dev, "adapter name: \"%s\"\n", + i2c_imx->adapter.name); +- dev_info(&i2c_imx->adapter.dev, "IMX I2C adapter registered\n"); +- +- /* Init DMA config if supported */ +- i2c_imx_dma_request(i2c_imx, phy_addr); + ++ dev_info(&i2c_imx->adapter.dev, "IMX I2C adapter registered\n"); + return 0; /* Return OK */ + ++del_adapter: ++ i2c_del_adapter(&i2c_imx->adapter); + rpm_disable: + pm_runtime_put_noidle(&pdev->dev); + pm_runtime_disable(&pdev->dev); + pm_runtime_set_suspended(&pdev->dev); + pm_runtime_dont_use_autosuspend(&pdev->dev); + +-clk_disable: +- clk_disable_unprepare(i2c_imx->clk); + return ret; + } + --- a/drivers/i2c/muxes/i2c-mux-pca954x.c +++ b/drivers/i2c/muxes/i2c-mux-pca954x.c @@ -85,6 +85,7 @@ struct pca954x { |