mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-24 15:56:49 +00:00
afd4bf08bc
Manually merged:
layerscape/808-i2c-0011-i2c-imx-support-slave-mode-for-imx-I2C-driver.patch
layerscape/808-i2c-0012-i2c-imx-correct-code-of-errata-A-010650-for-layersca.patch
Remaining modifications made by update_kernel.sh
Build system: x86_64
Build-tested: ipq806x/R7800, ath79/generic, bcm27xx/bcm2711, x86/64 [*],
ramips/mt7621 [*], ath79/tiny [*], ipq40xx [*], octeon [*],
realtek [*]
Run-tested: ipq806x/R7800, ramips/mt7621 [*], octeon [*], realtek [*]
No dmesg regressions, everything functional
Signed-off-by: John Audia <graysky@archlinux.us>
Tested-by: Stijn Segers <foss@volatilesystems.org> [*]
71 lines
2.1 KiB
Diff
71 lines
2.1 KiB
Diff
From 9de3b340d84b75f93081f871b640a065cba4ded0 Mon Sep 17 00:00:00 2001
|
|
From: Peng Ma <peng.ma@nxp.com>
|
|
Date: Tue, 26 Nov 2019 16:02:00 +0800
|
|
Subject: [PATCH] LF-162: i2c: imx: Defer probing if EDMA not available
|
|
|
|
EDMA may be not available or defered due to dependencies on
|
|
other modules, If these scenarios is encountered, we should
|
|
defer probing.
|
|
|
|
Signed-off-by: Peng Ma <peng.ma@nxp.com>
|
|
---
|
|
drivers/i2c/busses/i2c-imx.c | 16 +++++++++++-----
|
|
1 file changed, 11 insertions(+), 5 deletions(-)
|
|
|
|
--- a/drivers/i2c/busses/i2c-imx.c
|
|
+++ b/drivers/i2c/busses/i2c-imx.c
|
|
@@ -369,8 +369,8 @@ static void i2c_imx_reset_regs(struct im
|
|
}
|
|
|
|
/* 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;
|
|
@@ -379,7 +379,7 @@ 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_chan(dev, "tx");
|
|
if (IS_ERR(dma->chan_tx)) {
|
|
@@ -424,7 +424,7 @@ 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);
|
|
@@ -432,6 +432,8 @@ fail_tx:
|
|
dma_release_channel(dma->chan_tx);
|
|
fail_al:
|
|
devm_kfree(dev, dma);
|
|
+
|
|
+ return ret;
|
|
}
|
|
|
|
static void i2c_imx_dma_callback(void *arg)
|
|
@@ -1633,10 +1635,14 @@ static int i2c_imx_probe(struct platform
|
|
dev_info(&i2c_imx->adapter.dev, "IMX I2C adapter registered\n");
|
|
|
|
/* Init DMA config if supported */
|
|
- i2c_imx_dma_request(i2c_imx, phy_addr);
|
|
+ ret = i2c_imx_dma_request(i2c_imx, phy_addr);
|
|
+ if (ret == -EPROBE_DEFER)
|
|
+ goto i2c_adapter_remove;
|
|
|
|
return 0; /* Return OK */
|
|
|
|
+i2c_adapter_remove:
|
|
+ i2c_del_adapter(&i2c_imx->adapter);
|
|
clk_notifier_unregister:
|
|
clk_notifier_unregister(i2c_imx->clk, &i2c_imx->clk_change_nb);
|
|
free_irq(irq, i2c_imx);
|