On Wed, Feb 26, 2014 at 10:27:18AM +0000, Lucas Stach wrote:
> From: Juergen Beisert <jbe@xxxxxxxxxxxxxx>
>
> This patch adds support for Message Signaled Interrupt in the
> imx6q-pcie driver. It is done in a similar way as for the Exynos
> PCIe driver (commit f342d940ee0e3a2b5197fd4fbade1cb6bbc960b7),
> which is also using the Synopsys designware PCIe IP core.
>
> Signed-off-by: Harro Haan <hrhaan@xxxxxxxxx>
> Signed-off-by: Juergen Beisert <jbe@xxxxxxxxxxxxxx>
> Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> ---
> v2: fix typo MCI->MSI
> ---
> drivers/pci/host/pci-imx6.c | 29 +++++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
> index ee082509b0ba..344a72184307 100644
> --- a/drivers/pci/host/pci-imx6.c
> +++ b/drivers/pci/host/pci-imx6.c
> @@ -25,6 +25,7 @@
> #include <linux/resource.h>
> #include <linux/signal.h>
> #include <linux/types.h>
> +#include <linux/interrupt.h>
>
> #include "pcie-designware.h"
>
> @@ -329,6 +330,17 @@ static int imx6_pcie_wait_for_link(struct pcie_port *pp)
> return 0;
> }
>
> +/* legacy IRQD/MSI interrupt */
> +static irqreturn_t imx6_pcie_irqd_msi_handler(int irq, void *arg)
> +{
> + struct pcie_port *pp = arg;
> +
> + if (IS_ENABLED(CONFIG_PCI_MSI))
> + dw_handle_msi_irq(pp);
> +
> + return IRQ_HANDLED;
> +}
> +
> static int imx6_pcie_start_link(struct pcie_port *pp)
> {
> struct imx6_pcie *imx6_pcie = to_imx6_pcie(pp);
> @@ -403,6 +415,9 @@ static void imx6_pcie_host_init(struct pcie_port *pp)
> dw_pcie_setup_rc(pp);
>
> imx6_pcie_start_link(pp);
> +
> + if (IS_ENABLED(CONFIG_PCI_MSI))
> + dw_pcie_msi_init(pp);
> }
>
> static void imx6_pcie_reset_phy(struct pcie_port *pp)
> @@ -498,6 +513,20 @@ static int imx6_add_pcie_port(struct pcie_port *pp,
> return -ENODEV;
> }
>
> + if (IS_ENABLED(CONFIG_PCI_MSI)) {
> + pp->msi_irq = platform_get_irq(pdev, 3);
> + if (!pp->msi_irq) {
> + dev_err(&pdev->dev, "failed to get INTD/MSI\n");
> + return -ENODEV;
> + }
Doesn't this break existing DTBs?
Cheers,
Mark.
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