[ARM] pxa: Add multi-io support for e-series

    This patchset provides support for the TMIO based IO controller used in the
    Toshiba e-series PDAs.

    Signed-off-by: Ian Molton <spyro@f2s.com>
    Acked-by: Samuel Ortiz <sameo@openedhand.com>
    Acked-by: Eric Miao <eric.y.miao@gmail.com>

1 files changed, 81 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/eseries.c b/arch/arm/mach-pxa/eseries.c
index ee79e33b1748..dfce7d5b659e 100644
--- a/arch/arm/mach-pxa/eseries.c
+++ b/arch/arm/mach-pxa/eseries.c
@@ -13,6 +13,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/gpio.h>
+#include <linux/delay.h>
 #include <linux/platform_device.h>
 
 #include <asm/setup.h>
@@ -26,6 +27,7 @@
 #include <mach/irda.h>
 
 #include "generic.h"
+#include "clock.h"
 
 /* Only e800 has 128MB RAM */
 void __init eseries_fixup(struct machine_desc *desc,
@@ -86,3 +88,82 @@ struct pxaficp_platform_data e7xx_ficp_platform_data = {
         .shutdown = e7xx_irda_shutdown,
 };
 
+int eseries_tmio_enable(struct platform_device *dev)
+{
+        /* Reset - bring SUSPEND high before PCLR */
+        gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 0);
+        gpio_set_value(GPIO_ESERIES_TMIO_PCLR, 0);
+        msleep(1);
+        gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 1);
+        msleep(1);
+        gpio_set_value(GPIO_ESERIES_TMIO_PCLR, 1);
+        msleep(1);
+        return 0;
+}
+
+int eseries_tmio_disable(struct platform_device *dev)
+{
+        gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 0);
+        gpio_set_value(GPIO_ESERIES_TMIO_PCLR, 0);
+        return 0;
+}
+
+int eseries_tmio_suspend(struct platform_device *dev)
+{
+        gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 0);
+        return 0;
+}
+
+int eseries_tmio_resume(struct platform_device *dev)
+{
+        gpio_set_value(GPIO_ESERIES_TMIO_SUSPEND, 1);
+        msleep(1);
+        return 0;
+}
+
+void eseries_get_tmio_gpios(void)
+{
+        gpio_request(GPIO_ESERIES_TMIO_SUSPEND, NULL);
+        gpio_request(GPIO_ESERIES_TMIO_PCLR, NULL);
+        gpio_direction_output(GPIO_ESERIES_TMIO_SUSPEND, 0);
+        gpio_direction_output(GPIO_ESERIES_TMIO_PCLR, 0);
+}
+
+/* TMIO controller uses the same resources on all e-series machines. */
+struct resource eseries_tmio_resources[] = {
+        [0] = {
+                .start  = PXA_CS4_PHYS,
+                .end    = PXA_CS4_PHYS + 0x1fffff,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = IRQ_GPIO(GPIO_ESERIES_TMIO_IRQ),
+                .end    = IRQ_GPIO(GPIO_ESERIES_TMIO_IRQ),
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+/* Some e-series hardware cannot control the 32K clock */
+static void clk_32k_dummy(struct clk *clk)
+{
+}
+
+static const struct clkops clk_32k_dummy_ops = {
+        .enable         = clk_32k_dummy,
+        .disable        = clk_32k_dummy,
+};
+
+static struct clk tmio_dummy_clk = {
+        .ops    = &clk_32k_dummy_ops,
+        .rate   = 32768,
+};
+
+static struct clk_lookup eseries_clkregs[] = {
+        INIT_CLKREG(&tmio_dummy_clk, NULL, "CLK_CK32K"),
+};
+
+void eseries_register_clks(void)
+{
+        clks_register(eseries_clkregs, ARRAY_SIZE(eseries_clkregs));
+}
+