ARM: tegra: enterprise: BB pwr ctrl handover to user space

The Icera baseband on Enterprise is powered ON by FIL from user space.
There is no need to power ON the baseband from kernel space and it is
preferable to not do it as FIL initiates a power cycle of the baseband
anyway.

Remove reference to ph450.

bug 875299

Reviewed-on: http://git-master/r/54916
(cherry picked from commit a4bfbcdde94834e39318efe79f952ed077e96f63)

Change-Id: I39789c00fc6994144a89db901e0f2faadff9d330
Reviewed-on: http://git-master/r/60350
Reviewed-by: Sheshagiri Shenoy <sshenoy@nvidia.com>
Reviewed-by: Varun Colbert <vcolbert@nvidia.com>
Tested-by: Varun Colbert <vcolbert@nvidia.com>

Rebase-Id: R027546eb2ca76afdd85486981e5a937611215572

1 files changed, 29 insertions, 18 deletions

diff --git a/arch/arm/mach-tegra/board-enterprise-baseband.c b/arch/arm/mach-tegra/board-enterprise-baseband.c
index 6f2afa113d33..3f1b3cfbfcef 100644
--- a/arch/arm/mach-tegra/board-enterprise-baseband.c
+++ b/arch/arm/mach-tegra/board-enterprise-baseband.c
@@ -40,7 +40,7 @@
 #define MODEM_RESET     TEGRA_GPIO_PE1
 #define BB_RST_OUT      TEGRA_GPIO_PV1
 
-/* Icera 450 GPIO */
+/* Icera BB GPIO */
 #define AP2MDM_ACK      TEGRA_GPIO_PE3
 #define MDM2AP_ACK      TEGRA_GPIO_PU5
 #define AP2MDM_ACK2     TEGRA_GPIO_PE2
@@ -55,15 +55,15 @@ static struct gpio modem_gpios[] = {
 	{AP2MDM_ACK2, GPIOF_OUT_INIT_HIGH, "AP2MDM ACK2"},
 };
 
-static int ph450_phy_on(void);
-static int ph450_phy_off(void);
+static int baseband_phy_on(void);
+static int baseband_phy_off(void);
 
 static struct tegra_ulpi_trimmer e1219_trimmer = { 10, 1, 1, 1 };
 
 static struct tegra_ulpi_config ehci2_null_ulpi_phy_config = {
 	.trimmer = &e1219_trimmer,
-	.post_phy_on = ph450_phy_on,
-	.pre_phy_off = ph450_phy_off,
+	.post_phy_on = baseband_phy_on,
+	.pre_phy_off = baseband_phy_off,
 };
 
 static struct tegra_ehci_platform_data ehci2_null_ulpi_platform_data = {
@@ -93,7 +93,7 @@ static irqreturn_t mdm_start_thread(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static int ph450_phy_on(void)
+static int baseband_phy_on(void)
 {
 	/* set AP2MDM_ACK2 low */
 	gpio_set_value(AP2MDM_ACK2, 0);
@@ -101,7 +101,7 @@ static int ph450_phy_on(void)
 	return 0;
 }
 
-static int ph450_phy_off(void)
+static int baseband_phy_off(void)
 {
 	/* set AP2MDM_ACK2 high */
 	gpio_set_value(AP2MDM_ACK2, 1);
@@ -109,15 +109,26 @@ static int ph450_phy_off(void)
 	return 0;
 }
 
-static void ph450_reset(void)
+static void baseband_start(void)
 {
+	/*
+	 *  Leave baseband powered OFF.
+	 *  User-space daemons will take care of powering it up.
+	 */
+	pr_info("%s\n", __func__);
+	gpio_set_value(MODEM_PWR_ON, 0);
+}
+
+static void baseband_reset(void)
+{
+	/* Initiate power cycle on baseband sub system */
 	pr_info("%s\n", __func__);
 	gpio_set_value(MODEM_PWR_ON, 0);
 	mdelay(200);
 	gpio_set_value(MODEM_PWR_ON, 1);
 }
 
-static int ph450_init(void)
+static int baseband_init(void)
 {
 	int irq;
 	int ret;
@@ -168,28 +179,28 @@ static int ph450_init(void)
 	return 0;
 }
 
-static const struct tegra_modem_operations ph450_operations = {
-	.init = ph450_init,
-	.start = ph450_reset,
-	.reset = ph450_reset,
+static const struct tegra_modem_operations baseband_operations = {
+	.init = baseband_init,
+	.start = baseband_start,
+	.reset = baseband_reset,
 };
 
-static struct tegra_usb_modem_power_platform_data ph450_pdata = {
-	.ops = &ph450_operations,
+static struct tegra_usb_modem_power_platform_data baseband_pdata = {
+	.ops = &baseband_operations,
 	.wake_gpio = MDM2AP_ACK2,
 	.flags = IRQF_TRIGGER_FALLING,
 };
 
-static struct platform_device icera_450_device = {
+static struct platform_device icera_baseband_device = {
 	.name = "tegra_usb_modem_power",
 	.id = -1,
 	.dev = {
-		.platform_data = &ph450_pdata,
+		.platform_data = &baseband_pdata,
 	},
 };
 
 int __init enterprise_modem_init(void)
 {
-	platform_device_register(&icera_450_device);
+	platform_device_register(&icera_baseband_device);
 	return 0;
 }