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spi: spi-nxp-fspi: Add ACPI support 

Currently NXP fspi  driver has support of DT only. Adding ACPI
support to the driver so that it can be used by UEFI firmware
booting in ACPI mode. This driver will be probed if any firmware
will expose HID "NXP0009" in DSDT table.

Signed-off-by: kuldip dwivedi <kuldip.dwivedi@puresoftware.com>
Reviewed-by: Ashish Kumar <Ashish.Kumar@nxp.com>
Link: https://lore.kernel.org/r/20200911130331.6313-1-kuldip.dwivedi@puresoftware.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
kuldip dwivedi 2020-09-11 18:33:31 +05:30 committed by Mark Brown
parent 7349201d9d
commit 55ab8487e0
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 50 additions and 19 deletions
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69
drivers/spi/spi-nxp-fspi.c
View File

@ -3,7 +3,8 @@
/*
* NXP FlexSPI(FSPI) controller driver.
*
* Copyright 2019 NXP.
* Copyright 2019-2020 NXP
* Copyright 2020 Puresoftware Ltd.
*
* FlexSPI is a flexsible SPI host controller which supports two SPI
* channels and up to 4 external devices. Each channel supports
@ -30,6 +31,7 @@
* Frieder Schrempf <frieder.schrempf@kontron.de>
*/
#include <linux/acpi.h>
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/completion.h>
@ -563,6 +565,9 @@ static int nxp_fspi_clk_prep_enable(struct nxp_fspi *f)
{
int ret;
if (is_acpi_node(f->dev->fwnode))
return 0;
ret = clk_prepare_enable(f->clk_en);
if (ret)
return ret;
@ -576,10 +581,15 @@ static int nxp_fspi_clk_prep_enable(struct nxp_fspi *f)
return 0;
}
static void nxp_fspi_clk_disable_unprep(struct nxp_fspi *f)
static int nxp_fspi_clk_disable_unprep(struct nxp_fspi *f)
{
if (is_acpi_node(f->dev->fwnode))
return 0;
clk_disable_unprepare(f->clk);
clk_disable_unprepare(f->clk_en);
return 0;
}
/*
@ -1001,7 +1011,7 @@ static int nxp_fspi_probe(struct platform_device *pdev)
f = spi_controller_get_devdata(ctlr);
f->dev = dev;
f->devtype_data = of_device_get_match_data(dev);
f->devtype_data = device_get_match_data(dev);
if (!f->devtype_data) {
ret = -ENODEV;
goto err_put_ctrl;
@ -1010,7 +1020,12 @@ static int nxp_fspi_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, f);
/* find the resources - configuration register address space */
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fspi_base");
if (is_acpi_node(f->dev->fwnode))
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
else
res = platform_get_resource_byname(pdev,
IORESOURCE_MEM, "fspi_base");
f->iobase = devm_ioremap_resource(dev, res);
if (IS_ERR(f->iobase)) {
ret = PTR_ERR(f->iobase);
@ -1018,7 +1033,12 @@ static int nxp_fspi_probe(struct platform_device *pdev)
}
/* find the resources - controller memory mapped space */
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fspi_mmap");
if (is_acpi_node(f->dev->fwnode))
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
else
res = platform_get_resource_byname(pdev,
IORESOURCE_MEM, "fspi_mmap");
if (!res) {
ret = -ENODEV;
goto err_put_ctrl;
@ -1029,22 +1049,24 @@ static int nxp_fspi_probe(struct platform_device *pdev)
f->memmap_phy_size = resource_size(res);
/* find the clocks */
f->clk_en = devm_clk_get(dev, "fspi_en");
if (IS_ERR(f->clk_en)) {
ret = PTR_ERR(f->clk_en);
goto err_put_ctrl;
}
if (dev_of_node(&pdev->dev)) {
f->clk_en = devm_clk_get(dev, "fspi_en");
if (IS_ERR(f->clk_en)) {
ret = PTR_ERR(f->clk_en);
goto err_put_ctrl;
}
f->clk = devm_clk_get(dev, "fspi");
if (IS_ERR(f->clk)) {
ret = PTR_ERR(f->clk);
goto err_put_ctrl;
}
f->clk = devm_clk_get(dev, "fspi");
if (IS_ERR(f->clk)) {
ret = PTR_ERR(f->clk);
goto err_put_ctrl;
}
ret = nxp_fspi_clk_prep_enable(f);
if (ret) {
dev_err(dev, "can not enable the clock\n");
goto err_put_ctrl;
ret = nxp_fspi_clk_prep_enable(f);
if (ret) {
dev_err(dev, "can not enable the clock\n");
goto err_put_ctrl;
}
}
/* find the irq */
@ -1127,6 +1149,14 @@ static const struct of_device_id nxp_fspi_dt_ids[] = {
};
MODULE_DEVICE_TABLE(of, nxp_fspi_dt_ids);
#ifdef CONFIG_ACPI
static const struct acpi_device_id nxp_fspi_acpi_ids[] = {
{ "NXP0009", .driver_data = (kernel_ulong_t)&lx2160a_data, },
{}
};
MODULE_DEVICE_TABLE(acpi, nxp_fspi_acpi_ids);
#endif
static const struct dev_pm_ops nxp_fspi_pm_ops = {
.suspend = nxp_fspi_suspend,
.resume = nxp_fspi_resume,
@ -1136,6 +1166,7 @@ static struct platform_driver nxp_fspi_driver = {
.driver = {
.name = "nxp-fspi",
.of_match_table = nxp_fspi_dt_ids,
.acpi_match_table = ACPI_PTR(nxp_fspi_acpi_ids),
.pm = &nxp_fspi_pm_ops,
},
.probe = nxp_fspi_probe,