272 lines
8.7 KiB
Diff
272 lines
8.7 KiB
Diff
From 5f6f6af41e39677c9b722376a4088d10732cdd44 Mon Sep 17 00:00:00 2001
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From: Chen-Yu Tsai <wens@csie.org>
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Date: Fri, 17 Jan 2014 14:47:26 +0800
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Subject: [PATCH] net: rfkill: gpio: fix gpio name buffer size off by 1
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snprintf should be passed the complete size of the buffer, including
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the space for '\0'. The previous code resulted in the *_reset and
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*_shutdown strings being truncated.
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Signed-off-by: Chen-Yu Tsai <wens@csie.org>
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---
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net/rfkill/rfkill-gpio.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c
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index bd2a5b9..97ec12a 100644
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--- a/net/rfkill/rfkill-gpio.c
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+++ b/net/rfkill/rfkill-gpio.c
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@@ -117,8 +117,8 @@ static int rfkill_gpio_probe(struct platform_device *pdev)
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if (!rfkill->shutdown_name)
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return -ENOMEM;
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- snprintf(rfkill->reset_name, len + 6 , "%s_reset", rfkill->name);
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- snprintf(rfkill->shutdown_name, len + 9, "%s_shutdown", rfkill->name);
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+ snprintf(rfkill->reset_name, len + 7 , "%s_reset", rfkill->name);
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+ snprintf(rfkill->shutdown_name, len + 10, "%s_shutdown", rfkill->name);
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rfkill->clk = devm_clk_get(&pdev->dev, clk_name);
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--
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2.0.3
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From d91c313c08167978c3fb20b327b6a7abb7b00ffd Mon Sep 17 00:00:00 2001
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From: Chen-Yu Tsai <wens@csie.org>
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Date: Fri, 17 Jan 2014 14:47:27 +0800
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Subject: [PATCH] net: rfkill: gpio: use
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clk_prepare_enable/clk_disable_unprepare
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rfkill-gpio calls clk_enable() without first calling clk_prepare(),
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resulting in a warning and no effect. Switch to clk_prepare_enable()
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and clk_disable_unprepare.
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Signed-off-by: Chen-Yu Tsai <wens@csie.org>
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---
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net/rfkill/rfkill-gpio.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c
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index 97ec12a..c7081b7 100644
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--- a/net/rfkill/rfkill-gpio.c
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+++ b/net/rfkill/rfkill-gpio.c
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@@ -51,10 +51,10 @@ static int rfkill_gpio_set_power(void *data, bool blocked)
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gpiod_set_value(rfkill->shutdown_gpio, 0);
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gpiod_set_value(rfkill->reset_gpio, 0);
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if (!IS_ERR(rfkill->clk) && rfkill->clk_enabled)
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- clk_disable(rfkill->clk);
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+ clk_disable_unprepare(rfkill->clk);
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} else {
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if (!IS_ERR(rfkill->clk) && !rfkill->clk_enabled)
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- clk_enable(rfkill->clk);
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+ clk_prepare_enable(rfkill->clk);
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gpiod_set_value(rfkill->reset_gpio, 1);
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gpiod_set_value(rfkill->shutdown_gpio, 1);
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}
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--
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2.0.3
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From f6dc85e22d3215a26f509fb5b34ca34c56a0d8b4 Mon Sep 17 00:00:00 2001
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From: Chen-Yu Tsai <wens@csie.org>
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Date: Fri, 17 Jan 2014 14:47:28 +0800
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Subject: [PATCH] net: rfkill: gpio: fix reversed clock enable state
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rfkill-gpio has clk_enabled = blocked, which is true when rfkill
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blocks the device. This results in calling clock enable/disable at
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the wrong time. Reversing the value fixes this.
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Signed-off-by: Chen-Yu Tsai <wens@csie.org>
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---
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net/rfkill/rfkill-gpio.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c
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index c7081b7..3084fa3 100644
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--- a/net/rfkill/rfkill-gpio.c
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+++ b/net/rfkill/rfkill-gpio.c
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@@ -59,7 +59,7 @@ static int rfkill_gpio_set_power(void *data, bool blocked)
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gpiod_set_value(rfkill->shutdown_gpio, 1);
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}
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- rfkill->clk_enabled = blocked;
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+ rfkill->clk_enabled = !blocked;
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return 0;
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}
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--
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2.0.3
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From 57301a41d4a82902e967f6bd9f09ba6ca31fcbed Mon Sep 17 00:00:00 2001
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From: Chen-Yu Tsai <wens@csie.org>
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Date: Fri, 17 Jan 2014 14:47:29 +0800
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Subject: [PATCH] net: rfkill: gpio: add device tree support
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Signed-off-by: Chen-Yu Tsai <wens@csie.org>
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---
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.../devicetree/bindings/rfkill/rfkill-gpio.txt | 26 ++++++++++++++++++++++
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net/rfkill/rfkill-gpio.c | 23 +++++++++++++++++++
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2 files changed, 49 insertions(+)
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create mode 100644 Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt
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diff --git a/Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt b/Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt
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new file mode 100644
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index 0000000..8a07ea4
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--- /dev/null
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+++ b/Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt
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@@ -0,0 +1,26 @@
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+GPIO controlled RFKILL devices
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+
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+Required properties:
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+- compatible : Must be "rfkill-gpio".
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+- rfkill-name : Name of RFKILL device
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+- rfkill-type : Type of RFKILL device: 1 for WiFi, 2 for BlueTooth
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+- NAME_shutdown-gpios : GPIO phandle to shutdown control
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+ (phandle must be the second)
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+- NAME_reset-gpios : GPIO phandle to reset control
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+
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+NAME must match the rfkill-name property. NAME_shutdown-gpios or
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+NAME_reset-gpios, or both, must be defined.
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+
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+Optional properties:
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+- clocks : phandle to clock to enable/disable
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+
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+Example:
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+
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+ rfkill_bt: rfkill@0 {
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+ compatible = "rfkill-gpio";
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+ rfkill-name = "bluetooth";
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+ rfkill-type = <2>;
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+ bluetooth_shutdown-gpios = <0>, <&pio 7 18 0>;
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+ bluetooth_reset-gpios = <&pio 7 24 0>;
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+ clocks = <&clk_out_a>;
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+ };
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diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c
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index 3084fa3..48381a8 100644
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--- a/net/rfkill/rfkill-gpio.c
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+++ b/net/rfkill/rfkill-gpio.c
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@@ -26,6 +26,7 @@
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#include <linux/slab.h>
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#include <linux/acpi.h>
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#include <linux/gpio/consumer.h>
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+#include <linux/of_gpio.h>
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#include <linux/rfkill-gpio.h>
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@@ -83,6 +84,18 @@ static int rfkill_gpio_acpi_probe(struct device *dev,
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return 0;
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}
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+static int rfkill_gpio_dt_probe(struct device *dev,
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+ struct rfkill_gpio_data *rfkill)
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+{
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+ struct device_node * np = dev->of_node;
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+
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+ rfkill->name = np->name;
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+ of_property_read_string(np, "rfkill-name", &rfkill->name);
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+ of_property_read_u32(np, "rfkill-type", &rfkill->type);
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+
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+ return 0;
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+}
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+
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static int rfkill_gpio_probe(struct platform_device *pdev)
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{
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struct rfkill_gpio_platform_data *pdata = pdev->dev.platform_data;
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@@ -100,6 +113,10 @@ static int rfkill_gpio_probe(struct platform_device *pdev)
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ret = rfkill_gpio_acpi_probe(&pdev->dev, rfkill);
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if (ret)
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return ret;
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+ } else if (&pdev->dev.of_node) {
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+ ret = rfkill_gpio_dt_probe(&pdev->dev, rfkill);
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+ if (ret)
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+ return ret;
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} else if (pdata) {
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clk_name = pdata->power_clk_name;
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rfkill->name = pdata->name;
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@@ -189,6 +206,11 @@ static const struct acpi_device_id rfkill_acpi_match[] = {
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{ },
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};
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+static const struct of_device_id rfkill_of_match[] = {
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+ { .compatible = "rfkill-gpio", },
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+ {},
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+};
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+
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static struct platform_driver rfkill_gpio_driver = {
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.probe = rfkill_gpio_probe,
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.remove = rfkill_gpio_remove,
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@@ -196,6 +218,7 @@ static struct platform_driver rfkill_gpio_driver = {
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.name = "rfkill_gpio",
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.owner = THIS_MODULE,
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.acpi_match_table = ACPI_PTR(rfkill_acpi_match),
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+ .of_match_table = of_match_ptr(rfkill_of_match),
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},
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};
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--
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2.0.3
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From 83c43937ee8c5fcb38241a8e89c2b93e5b0f9526 Mon Sep 17 00:00:00 2001
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From: Chen-Yu Tsai <wens@csie.org>
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Date: Fri, 17 Jan 2014 14:47:30 +0800
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Subject: [PATCH] net: rfkill: gpio: add clock-frequency device tree property
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Some devices, such as Broadcom Bluetooth devices, require a specific
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clock rate for the clock tied to the rfkill device. Add clock-frequency
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property so we can specify this from the device tree.
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Signed-off-by: Chen-Yu Tsai <wens@csie.org>
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---
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Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt | 2 ++
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net/rfkill/rfkill-gpio.c | 4 ++++
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2 files changed, 6 insertions(+)
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diff --git a/Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt b/Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt
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index 8a07ea4..8b8db0a 100644
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--- a/Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt
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+++ b/Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt
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@@ -13,6 +13,7 @@ NAME_reset-gpios, or both, must be defined.
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Optional properties:
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- clocks : phandle to clock to enable/disable
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+- clock-frequency : clock rate to set for the given clock
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Example:
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@@ -23,4 +24,5 @@ Example:
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bluetooth_shutdown-gpios = <0>, <&pio 7 18 0>;
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bluetooth_reset-gpios = <&pio 7 24 0>;
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clocks = <&clk_out_a>;
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+ clock-frequency = <32678>;
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};
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diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c
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index 48381a8..3092681 100644
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--- a/net/rfkill/rfkill-gpio.c
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+++ b/net/rfkill/rfkill-gpio.c
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@@ -40,6 +40,7 @@ struct rfkill_gpio_data {
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char *reset_name;
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char *shutdown_name;
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struct clk *clk;
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+ int clk_frequency;
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bool clk_enabled;
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};
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@@ -92,6 +93,7 @@ static int rfkill_gpio_dt_probe(struct device *dev,
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rfkill->name = np->name;
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of_property_read_string(np, "rfkill-name", &rfkill->name);
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of_property_read_u32(np, "rfkill-type", &rfkill->type);
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+ of_property_read_u32(np, "clock-frequency", &rfkill->clk_frequency);
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return 0;
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}
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@@ -138,6 +140,8 @@ static int rfkill_gpio_probe(struct platform_device *pdev)
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snprintf(rfkill->shutdown_name, len + 10, "%s_shutdown", rfkill->name);
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rfkill->clk = devm_clk_get(&pdev->dev, clk_name);
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+ if (!IS_ERR(rfkill->clk) && rfkill->clk_frequency > 0)
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+ clk_set_rate(rfkill->clk, rfkill->clk_frequency);
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gpio = devm_gpiod_get_index(&pdev->dev, rfkill->reset_name, 0);
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if (!IS_ERR(gpio)) {
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--
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2.0.3
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