AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-25 05:30:54 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

i2c: xlp9xx: add ACPI support for Broadcom Vulcan

Browse Source 
Added ACPI support for the I2C controller present on Broadcom's
Vulcan ARM64 processor. ACPI ID used by the controller is BRCM9007.

Changed the xlp9xx_i2c_get_frequency() function to use
device_property_read_u32() API so that the "clock-frequency" value
can be read from _DSD in ACPI mode.

Signed-off-by: Tanmay Jagdale <tanmay.jagdale@broadcom.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Tanmay Jagdale 2016-06-20 14:56:18 +05:30 committed by Wolfram Sang
parent 914017836a
commit 748c0bbbf1
1 changed files with 11 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/i2c/busses/i2c-xlp9xx.c
View File

@ -6,6 +6,7 @@
* warranty of any kind, whether express or implied. * warranty of any kind, whether express or implied.
*/ */
#include <linux/acpi.h>
#include <linux/completion.h> #include <linux/completion.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <linux/init.h> #include <linux/init.h>
@ -341,11 +342,10 @@ static struct i2c_algorithm xlp9xx_i2c_algo = {
static int xlp9xx_i2c_get_frequency(struct platform_device *pdev, static int xlp9xx_i2c_get_frequency(struct platform_device *pdev,
struct xlp9xx_i2c_dev *priv) struct xlp9xx_i2c_dev *priv)
{ {
struct device_node *np = pdev->dev.of_node;
u32 freq; u32 freq;
int err; int err;
err = of_property_read_u32(np, "clock-frequency", &freq); err = device_property_read_u32(&pdev->dev, "clock-frequency", &freq);
if (err) { if (err) {
freq = XLP9XX_I2C_DEFAULT_FREQ; freq = XLP9XX_I2C_DEFAULT_FREQ;
dev_dbg(&pdev->dev, "using default frequency %u\n", freq); dev_dbg(&pdev->dev, "using default frequency %u\n", freq);
@ -429,12 +429,21 @@ static const struct of_device_id xlp9xx_i2c_of_match[] = {
{ /* sentinel */ }, { /* sentinel */ },
}; };
#ifdef CONFIG_ACPI
static const struct acpi_device_id xlp9xx_i2c_acpi_ids[] = {
{"BRCM9007", 0},
{}
};
MODULE_DEVICE_TABLE(acpi, xlp9xx_i2c_acpi_ids);
#endif
static struct platform_driver xlp9xx_i2c_driver = { static struct platform_driver xlp9xx_i2c_driver = {
.probe = xlp9xx_i2c_probe, .probe = xlp9xx_i2c_probe,
.remove = xlp9xx_i2c_remove, .remove = xlp9xx_i2c_remove,
.driver = { .driver = {
.name = "xlp9xx-i2c", .name = "xlp9xx-i2c",
.of_match_table = xlp9xx_i2c_of_match, .of_match_table = xlp9xx_i2c_of_match,
.acpi_match_table = ACPI_PTR(xlp9xx_i2c_acpi_ids),
}, },
}; };