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authorStephen Warren <swarren@nvidia.com>2012-05-02 15:47:12 -0600
committerStephen Warren <swarren@nvidia.com>2012-06-20 12:37:42 -0600
commita12c0efc7a3f433377add0fa1fd0ed4836cc595e (patch)
tree5dd8af8833d4dc4361a118da90324f86e26b407e /arch/arm/mach-tegra
parentc554dee35c3e6b0c19db5fb75193d4cd99736c6b (diff)
ARM: tegra: harmony: init regulators, PCIe when booting from DT
There currently aren't bindings for the Tegra PCIe controller. Work on this is in progress, but not yet complete. Manually initialize PCIe when booting from device tree, in order to bring DT support to the same feature level as board files, which will in turn allow board files to be deprecated. PCIe on Harmony requires various regulators to be registered and enabled before initializing the PCIe controller. Note that since the I2C controllers are instantiated from DT, we must use i2c_new_device() to register the PMU rather than i2c_register_board_info(). Signed-off-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra')
-rw-r--r--arch/arm/mach-tegra/board-dt-tegra20.c20
-rw-r--r--arch/arm/mach-tegra/board-harmony-pcie.c15
-rw-r--r--arch/arm/mach-tegra/board-harmony-power.c25
-rw-r--r--arch/arm/mach-tegra/board.h7
4 files changed, 61 insertions, 6 deletions
diff --git a/arch/arm/mach-tegra/board-dt-tegra20.c b/arch/arm/mach-tegra/board-dt-tegra20.c
index 9537f20384fc..777138611c77 100644
--- a/arch/arm/mach-tegra/board-dt-tegra20.c
+++ b/arch/arm/mach-tegra/board-dt-tegra20.c
@@ -109,6 +109,23 @@ static void __init trimslice_init(void)
}
#endif
+#ifdef CONFIG_MACH_HARMONY
+static void __init harmony_init(void)
+{
+ int ret;
+
+ ret = harmony_regulator_init();
+ if (ret) {
+ pr_err("harmony_regulator_init() failed: %d\n", ret);
+ return;
+ }
+
+ ret = harmony_pcie_init();
+ if (ret)
+ pr_err("harmony_pcie_init() failed: %d\n", ret);
+}
+#endif
+
static struct {
char *machine;
void (*init)(void);
@@ -116,6 +133,9 @@ static struct {
#ifdef CONFIG_MACH_TRIMSLICE
{ "compulab,trimslice", trimslice_init },
#endif
+#ifdef CONFIG_MACH_HARMONY
+ { "nvidia,harmony", harmony_init },
+#endif
};
static void __init tegra_dt_init_late(void)
diff --git a/arch/arm/mach-tegra/board-harmony-pcie.c b/arch/arm/mach-tegra/board-harmony-pcie.c
index 33c4fedab840..e8c3fda9bec2 100644
--- a/arch/arm/mach-tegra/board-harmony-pcie.c
+++ b/arch/arm/mach-tegra/board-harmony-pcie.c
@@ -27,14 +27,11 @@
#ifdef CONFIG_TEGRA_PCI
-static int __init harmony_pcie_init(void)
+int __init harmony_pcie_init(void)
{
struct regulator *regulator = NULL;
int err;
- if (!machine_is_harmony())
- return 0;
-
err = gpio_request(TEGRA_GPIO_EN_VDD_1V05_GPIO, "EN_VDD_1V05");
if (err)
return err;
@@ -62,7 +59,15 @@ err_reg:
return err;
}
+static int __init harmony_pcie_initcall(void)
+{
+ if (!machine_is_harmony())
+ return 0;
+
+ return harmony_pcie_init();
+}
+
/* PCI should be initialized after I2C, mfd and regulators */
-subsys_initcall_sync(harmony_pcie_init);
+subsys_initcall_sync(harmony_pcie_initcall);
#endif
diff --git a/arch/arm/mach-tegra/board-harmony-power.c b/arch/arm/mach-tegra/board-harmony-power.c
index 82f32300796c..44dcb2e869b5 100644
--- a/arch/arm/mach-tegra/board-harmony-power.c
+++ b/arch/arm/mach-tegra/board-harmony-power.c
@@ -20,6 +20,10 @@
#include <linux/gpio.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/tps6586x.h>
+#include <linux/of.h>
+#include <linux/of_i2c.h>
+
+#include <asm/mach-types.h>
#include <mach/irqs.h>
@@ -110,7 +114,26 @@ static struct i2c_board_info __initdata harmony_regulators[] = {
int __init harmony_regulator_init(void)
{
- i2c_register_board_info(3, harmony_regulators, 1);
+ if (machine_is_harmony()) {
+ i2c_register_board_info(3, harmony_regulators, 1);
+ } else { /* Harmony, booted using device tree */
+ struct device_node *np;
+ struct i2c_adapter *adapter;
+
+ np = of_find_node_by_path("/i2c@7000d000");
+ if (np == NULL) {
+ pr_err("Could not find device_node for DVC I2C\n");
+ return -ENODEV;
+ }
+
+ adapter = of_find_i2c_adapter_by_node(np);
+ if (!adapter) {
+ pr_err("Could not find i2c_adapter for DVC I2C\n");
+ return -ENODEV;
+ }
+
+ i2c_new_device(adapter, harmony_regulators);
+ }
return 0;
}
diff --git a/arch/arm/mach-tegra/board.h b/arch/arm/mach-tegra/board.h
index 65014968fc6c..097e0e16eacd 100644
--- a/arch/arm/mach-tegra/board.h
+++ b/arch/arm/mach-tegra/board.h
@@ -46,5 +46,12 @@ int __init tegra_powergate_debugfs_init(void);
static inline int tegra_powergate_debugfs_init(void) { return 0; }
#endif
+int __init harmony_regulator_init(void);
+#ifdef CONFIG_TEGRA_PCI
+int __init harmony_pcie_init(void);
+#else
+static inline int harmony_pcie_init(void) { return 0; }
+#endif
+
extern struct sys_timer tegra_timer;
#endif