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| author | Tanmay Jagdale <tanmay.jagdale@broadcom.com> | 2016-06-20 11:26:18 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2016-07-08 03:40:55 +0200 |
| commit | 748c0bbbf170700d5c612e09e8d89904ddf7ebc5 (patch) | |
| tree | fd70139d05421f4a0c709b968254d453449c53fc /drivers | |
| parent | i2c: meson: allow build with COMPILE_TEST (diff) | |
| download | linux-748c0bbbf170700d5c612e09e8d89904ddf7ebc5.tar.xz linux-748c0bbbf170700d5c612e09e8d89904ddf7ebc5.zip | |
i2c: xlp9xx: add ACPI support for Broadcom Vulcan
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/busses/i2c-xlp9xx.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-xlp9xx.c b/drivers/i2c/busses/i2c-xlp9xx.c index c941418f06f5..55a7bef1b2e1 100644 --- a/drivers/i2c/busses/i2c-xlp9xx.c +++ b/drivers/i2c/busses/i2c-xlp9xx.c @@ -6,6 +6,7 @@ * warranty of any kind, whether express or implied. */ +#include <linux/acpi.h> #include <linux/completion.h> #include <linux/i2c.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, struct xlp9xx_i2c_dev *priv) { - struct device_node *np = pdev->dev.of_node; u32 freq; int err; - err = of_property_read_u32(np, "clock-frequency", &freq); + err = device_property_read_u32(&pdev->dev, "clock-frequency", &freq); if (err) { freq = XLP9XX_I2C_DEFAULT_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 */ }, }; +#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 = { .probe = xlp9xx_i2c_probe, .remove = xlp9xx_i2c_remove, .driver = { .name = "xlp9xx-i2c", .of_match_table = xlp9xx_i2c_of_match, + .acpi_match_table = ACPI_PTR(xlp9xx_i2c_acpi_ids), }, }; |