[ARM] 4529/1: [HP Jornada 7XX] - Fix jornada720.c to use SSP driver

This fixes the jornada720.c file :

* ifdef for CONFIG_SA1100_JORNADA720_SSP since we dont want to include anything not selected in menyconfig.
* add documentation for init for future reference
* change platform driver name from jornada720_mcu ->
jornada_ssp.
* change maintainer in file.

Signed-off-by: Kristoffer Ericson <Kristoffer.Ericson@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 15 insertions, 12 deletions

diff --git a/arch/arm/mach-sa1100/jornada720.c b/arch/arm/mach-sa1100/jornada720.c
index 64067cd58d3..52ac37d1e23 100644
--- a/arch/arm/mach-sa1100/jornada720.c
+++ b/arch/arm/mach-sa1100/jornada720.c
@@ -3,6 +3,7 @@
  *
  * HP Jornada720 init code
  *
+ * Copyright (C) 2007 Kristoffer Ericson <Kristoffer.Ericson@gmail.com>
  * Copyright (C) 2006 Filip Zyzniewski <filip.zyzniewski@tefnet.pl>
  *  Copyright (C) 2005 Michael Gernoth <michael@gernoth.net>
  *
@@ -220,14 +221,16 @@ static struct platform_device sa1111_device = {
         .resource       = sa1111_resources,
 };
 
-static struct platform_device jornada720_mcu_device = {
-        .name           = "jornada720_mcu",
-        .id             = -1,
+static struct platform_device jornada_ssp_device = {
+        .name           = "jornada_ssp",
+        .id             = -1,
 };
 
 static struct platform_device *devices[] __initdata = {
         &sa1111_device,
-        &jornada720_mcu_device,
+#ifdef CONFIG_SA1100_JORNADA720_SSP
+        &jornada_ssp_device,
+#endif
         &s1d13xxxfb_device,
 };
 
@@ -236,19 +239,19 @@ static int __init jornada720_init(void)
         int ret = -ENODEV;
 
         if (machine_is_jornada720()) {
-                GPDR |= GPIO_GPIO20;
-                /* oscillator setup (line 116 of HP's doc) */
+                /* we want to use gpio20 as input to drive the clock of our uart 3 */
+                GPDR |= GPIO_GPIO20;    /* Clear gpio20 pin as input */
                 TUCR = TUCR_VAL;
-                /* resetting SA1111 (line 118 of HP's doc) */
-                GPSR = GPIO_GPIO20;
+                GPSR = GPIO_GPIO20;     /* start gpio20 pin */
                 udelay(1);
-                GPCR = GPIO_GPIO20;
+                GPCR = GPIO_GPIO20;     /* stop gpio20 */
                 udelay(1);
-                GPSR = GPIO_GPIO20;
-                udelay(20);
+                GPSR = GPIO_GPIO20;     /* restart gpio20 */
+                udelay(20);             /* give it some time to restart */
 
                 ret = platform_add_devices(devices, ARRAY_SIZE(devices));
         }
+
         return ret;
 }
 
@@ -345,7 +348,7 @@ static void __init jornada720_mach_init(void)
 }
 
 MACHINE_START(JORNADA720, "HP Jornada 720")
-        /* Maintainer: Michael Gernoth <michael@gernoth.net> */
+        /* Maintainer: Kristoffer Ericson <Kristoffer.Ericson@gmail.com> */
         .phys_io        = 0x80000000,
         .io_pg_offst    = ((0xf8000000) >> 18) & 0xfffc,
         .boot_params    = 0xc0000100,