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Date: Thu, 8 Dec 2011 15:13:10 -0700
From: Stephen Warren <swarren@...dia.com>
To: Linus Walleij <linus.walleij@...aro.org>
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-tegra@...r.kernel.org, Stephen Warren <swarren@...dia.com>
Subject: [RFC 3/3] New pinmux testing hacks
Signed-off-by: Stephen Warren <swarren@...dia.com>
---
DO NOT MERGE this: This is a local hack I use for testing, never to be
accepted upstream. I include it only as an FYI to anyone interested in
testing this.
arch/arm/boot/dts/tegra20.dtsi | 8 +++++
arch/arm/mach-tegra/pinmux.c | 2 +
drivers/pinctrl/pinctrl-tegra.c | 57 +++++++++++++++++++++++++++++++++++++++
3 files changed, 67 insertions(+), 0 deletions(-)
diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
index 4af5cd2..557d3d1 100644
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@@ -108,6 +108,14 @@
0x70000868 0xa8 >; /* Pad control registers */
};
+ pinmux2: pinmux2@...00000 {
+ compatible = "nvidia,tegra20-pinmux-new";
+ reg = < 0x70000014 0x10 /* Tri-state registers */
+ 0x70000080 0x20 /* Mux registers */
+ 0x700000a0 0x14 /* Pull-up/down registers */
+ 0x70000868 0xa8 >; /* Pad control registers */
+ };
+
serial@...06000 {
compatible = "nvidia,tegra20-uart";
reg = <0x70006000 0x40>;
diff --git a/arch/arm/mach-tegra/pinmux.c b/arch/arm/mach-tegra/pinmux.c
index 1d20165..453dce5 100644
--- a/arch/arm/mach-tegra/pinmux.c
+++ b/arch/arm/mach-tegra/pinmux.c
@@ -722,6 +722,7 @@ static int __devinit tegra_pinmux_probe(struct platform_device *pdev)
return -ENODEV;
}
+#if 0
if (!devm_request_mem_region(&pdev->dev, res->start,
resource_size(res),
dev_name(&pdev->dev))) {
@@ -729,6 +730,7 @@ static int __devinit tegra_pinmux_probe(struct platform_device *pdev)
"Couldn't request MEM resource %d\n", i);
return -ENODEV;
}
+#endif
regs[i] = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
diff --git a/drivers/pinctrl/pinctrl-tegra.c b/drivers/pinctrl/pinctrl-tegra.c
index 988be8f..fc2aa7e 100644
--- a/drivers/pinctrl/pinctrl-tegra.c
+++ b/drivers/pinctrl/pinctrl-tegra.c
@@ -428,6 +428,59 @@ static struct of_device_id tegra_pinctrl_of_match[] __devinitdata = {
{},
};
+#include <linux/pinctrl/machine.h>
+static void pmx_test_pre(void)
+{
+ static struct pinmux_map map[] = {
+ {
+ .name = "hack",
+ .ctrl_dev_name = "pinctrl.0",
+ .function = "pllm_out1",
+ .group = "cdev1",
+ .hog_on_boot = true,
+ },
+ };
+
+ pinmux_register_mappings(map, ARRAY_SIZE(map));
+}
+
+static void pmx_test_post(struct pinctrl_dev *pctl)
+{
+ unsigned long config;
+ int ret;
+
+ config = TEGRA_PINCONF_PACK(TEGRA_PINCONF_PARAM_TRISTATE, 0);
+ ret = pin_config_group_get(pctl, "atc", &config);
+ if (ret)
+ printk("ATC TRISTATE: COULD NOT RETRIEVE: %d\n", ret);
+ else
+ printk("ATC TRISTATE IS %d\n", (int)TEGRA_PINCONF_UNPACK_ARG(config));
+
+ config = TEGRA_PINCONF_PACK(TEGRA_PINCONF_PARAM_TRISTATE, 1);
+ ret = pin_config_group_set(pctl, "atc", config);
+ if (ret)
+ printk("ATC TRISTATE: COULD NOT SET: %d\n", ret);
+
+ config = TEGRA_PINCONF_PACK(TEGRA_PINCONF_PARAM_TRISTATE, 0);
+ ret = pin_config_group_get(pctl, "atc", &config);
+ if (ret)
+ printk("ATC TRISTATE: COULD NOT RETRIEVE: %d\n", ret);
+ else
+ printk("ATC TRISTATE IS NOW %d\n", (int)TEGRA_PINCONF_UNPACK_ARG(config));
+
+ config = TEGRA_PINCONF_PACK(TEGRA_PINCONF_PARAM_TRISTATE, 0);
+ ret = pin_config_group_set(pctl, "atc", config);
+ if (ret)
+ printk("ATC TRISTATE: COULD NOT SET: %d\n", ret);
+
+ config = TEGRA_PINCONF_PACK(TEGRA_PINCONF_PARAM_TRISTATE, 0);
+ ret = pin_config_group_get(pctl, "atc", &config);
+ if (ret)
+ printk("ATC TRISTATE: COULD NOT RETRIEVE: %d\n", ret);
+ else
+ printk("ATC TRISTATE IS NOW %d\n", (int)TEGRA_PINCONF_UNPACK_ARG(config));
+}
+
static int __devinit tegra_pinctrl_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
@@ -494,6 +547,8 @@ static int __devinit tegra_pinctrl_probe(struct platform_device *pdev)
}
}
+ pmx_test_pre();
+
pmx->pctl = pinctrl_register(&tegra_pinctrl_desc, &pdev->dev, pmx);
if (IS_ERR(pmx->pctl)) {
dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
@@ -502,6 +557,8 @@ static int __devinit tegra_pinctrl_probe(struct platform_device *pdev)
pinctrl_add_gpio_range(pmx->pctl, &tegra_pinctrl_gpio_range);
+ pmx_test_post(pmx->pctl);
+
platform_set_drvdata(pdev, pmx);
dev_dbg(&pdev->dev, "Probed Tegra pinctrl driver\n");
--
1.7.0.4
--
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