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modules/mqnic: Assert reset during probe of platform device, if connected

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
This commit is contained in:
Alex Forencich 2023-06-01 23:17:54 -07:00
parent 64cdae1ccf
commit f553be3b65
1 changed files with 13 additions and 0 deletions
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13
modules/mqnic/mqnic_main.c
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@ -37,6 +37,7 @@
#include <linux/module.h>
#include <linux/version.h>
#include <linux/delay.h>
#include <linux/reset.h>
#include <linux/rtc.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 4, 0)
@ -747,6 +748,7 @@ static int mqnic_platform_probe(struct platform_device *pdev)
struct mqnic_dev *mqnic;
struct device *dev = &pdev->dev;
struct resource *res;
struct reset_control *rst;
dev_info(dev, DRIVER_NAME " platform probe");
@ -770,6 +772,17 @@ static int mqnic_platform_probe(struct platform_device *pdev)
if (ret)
goto fail;
// Reset device
rst = devm_reset_control_get(dev, NULL);
if (IS_ERR(rst)) {
dev_warn(dev, "Cannot control device reset");
} else {
dev_info(dev, "Resetting device");
reset_control_assert(rst);
udelay(2);
reset_control_deassert(rst);
}
// Reserve and map regions
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mqnic->hw_regs_size = resource_size(res);