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staging/olpc_dcon: drop pin frobbing code for xo1.5 

This code looks in the PCI config space for pin addresses and sets up some
stuff.  However, Openfirmware has already done this for us, so there's no
need to ever do it in Linux.  According to Mitch Bradley, this OFW has been
doing this for us since at least B3 builds (pre-mass production).

Signed-off-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andres Salomon 2012-10-01 14:46:11 -07:00 committed by Greg Kroah-Hartman
parent 20b27c61b7
commit 6c98274cba
1 changed files with 0 additions and 30 deletions
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30
drivers/staging/olpc_dcon/olpc_dcon_xo_1_5.c
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@ -10,7 +10,6 @@
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/gpio.h>
#include <asm/olpc.h>
@ -62,33 +61,6 @@ static int dcon_was_irq(void)
static int dcon_init_xo_1_5(struct dcon_priv *dcon)
{
unsigned int irq;
u_int8_t tmp;
struct pci_dev *pdev;
pdev = pci_get_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_VX855, NULL);
if (!pdev) {
pr_err("cannot find VX855 PCI ID\n");
return 1;
}
pci_read_config_byte(pdev, 0x95, &tmp);
pci_write_config_byte(pdev, 0x95, tmp|0x0c);
/* Set GPIO8 to GPIO mode, not SSPICLK */
pci_read_config_byte(pdev, 0xe3, &tmp);
pci_write_config_byte(pdev, 0xe3, tmp | 0x04);
/* Set GPI10/GPI11 to GPI mode, not SSPISDI/SSPISS */
pci_read_config_byte(pdev, 0xe4, &tmp);
pci_write_config_byte(pdev, 0xe4, tmp|0x08);
/* clear PMU_RxE1[6] to select SCI on GPIO12 */
/* clear PMU_RxE0[6] to choose falling edge */
pci_read_config_byte(pdev, 0xe1, &tmp);
pci_write_config_byte(pdev, 0xe1, tmp & ~BIT_GPIO12);
pci_read_config_byte(pdev, 0xe0, &tmp);
pci_write_config_byte(pdev, 0xe0, tmp & ~BIT_GPIO12);
dcon_clear_irq();
@ -101,8 +73,6 @@ static int dcon_init_xo_1_5(struct dcon_priv *dcon)
DCON_SOURCE_CPU : DCON_SOURCE_DCON;
dcon->pending_src = dcon->curr_src;
pci_dev_put(pdev);
/* we're sharing the IRQ with ACPI */
irq = acpi_gbl_FADT.sci_interrupt;
if (request_irq(irq, &dcon_interrupt, IRQF_SHARED, "DCON", dcon)) {