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authorLee Jones <lee.jones@linaro.org>2019-06-12 15:26:49 +0100
committerWolfram Sang <wsa@the-dreams.de>2019-06-14 23:24:34 +0200
commitc9913ac42135cf7f1c8986bcb175c5a7dda126e6 (patch)
treeb2f350cbc509c61038430bddfbb2b46a5c7185da /drivers/i2c
parentc3c2889b8a2c9dfccca5aad647878ae0032dfc69 (diff)
downloadlinux-c9913ac42135cf7f1c8986bcb175c5a7dda126e6.tar.bz2
i2c: qcom-geni: Provide support for ACPI
Add a match table to allow automatic probing of ACPI device QCOM0220. Ignore clock attainment errors. Set default clock frequency value. Signed-off-by: Lee Jones <lee.jones@linaro.org> Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-qcom-geni.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
index eec13c72d644..a89bfce5388e 100644
--- a/drivers/i2c/busses/i2c-qcom-geni.c
+++ b/drivers/i2c/busses/i2c-qcom-geni.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
+#include <linux/acpi.h>
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
@@ -483,6 +484,14 @@ static const struct i2c_algorithm geni_i2c_algo = {
.functionality = geni_i2c_func,
};
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id geni_i2c_acpi_match[] = {
+ { "QCOM0220"},
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, geni_i2c_acpi_match);
+#endif
+
static int geni_i2c_probe(struct platform_device *pdev)
{
struct geni_i2c_dev *gi2c;
@@ -502,7 +511,7 @@ static int geni_i2c_probe(struct platform_device *pdev)
return PTR_ERR(gi2c->se.base);
gi2c->se.clk = devm_clk_get(&pdev->dev, "se");
- if (IS_ERR(gi2c->se.clk)) {
+ if (IS_ERR(gi2c->se.clk) && !has_acpi_companion(&pdev->dev)) {
ret = PTR_ERR(gi2c->se.clk);
dev_err(&pdev->dev, "Err getting SE Core clk %d\n", ret);
return ret;
@@ -516,6 +525,9 @@ static int geni_i2c_probe(struct platform_device *pdev)
gi2c->clk_freq_out = KHZ(100);
}
+ if (has_acpi_companion(&pdev->dev))
+ ACPI_COMPANION_SET(&gi2c->adap.dev, ACPI_COMPANION(&pdev->dev));
+
gi2c->irq = platform_get_irq(pdev, 0);
if (gi2c->irq < 0) {
dev_err(&pdev->dev, "IRQ error for i2c-geni\n");
@@ -662,6 +674,7 @@ static struct platform_driver geni_i2c_driver = {
.name = "geni_i2c",
.pm = &geni_i2c_pm_ops,
.of_match_table = geni_i2c_dt_match,
+ .acpi_match_table = ACPI_PTR(geni_i2c_acpi_match),
},
};