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authorkuldip dwivedi <kuldip.dwivedi@puresoftware.com>2020-09-11 16:03:31 +0300
committerMark Brown <broonie@kernel.org>2020-09-17 21:56:03 +0300
commit55ab8487e01d18466ddf596acc7a11e8c53b2812 (patch)
tree14e6feb3d3d2de3913254fab0d7538bc1d7c2dfc /drivers/spi/spi-nxp-fspi.c
parent7349201d9dfe0420489aa551c2dcc80fd6364799 (diff)
downloadlinux-55ab8487e01d18466ddf596acc7a11e8c53b2812.tar.xz
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>
Diffstat (limited to 'drivers/spi/spi-nxp-fspi.c')
-rw-r--r--drivers/spi/spi-nxp-fspi.c69
1 files changed, 50 insertions, 19 deletions
diff --git a/drivers/spi/spi-nxp-fspi.c b/drivers/spi/spi-nxp-fspi.c
index 1ccda82da206..0d41406c036d 100644
--- a/drivers/spi/spi-nxp-fspi.c
+++ b/drivers/spi/spi-nxp-fspi.c
@@ -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,