PCI: spear: Pass device-specific struct to internal functions

Only interfaces used from outside the driver, e.g., those called by the
DesignWare core, need to accept pointers to the generic struct pcie_port.
Internal interfaces can accept pointers to the device-specific struct,
which makes them more straightforward.  No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/drivers/pci/host/pcie-spear13xx.c b/drivers/pci/host/pcie-spear13xx.c
index 73f17dac1364ecd001e56c345ceabdd2c165cc9e..26e905d8922cd14d50dbe9d6996392f19e658ecd 100644 (file)
--- a/drivers/pci/host/pcie-spear13xx.c
+++ b/drivers/pci/host/pcie-spear13xx.c
@@ -72,11 +72,11 @@ struct pcie_app_reg {
 
 #define to_spear13xx_pcie(x)   container_of(x, struct spear13xx_pcie, pp)
 
-static int spear13xx_pcie_establish_link(struct pcie_port *pp)
+static int spear13xx_pcie_establish_link(struct spear13xx_pcie *spear13xx_pcie)
 {
-       u32 val;
-       struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pp);
+       struct pcie_port *pp = &spear13xx_pcie->pp;
        struct pcie_app_reg *app_reg = spear13xx_pcie->app_base;
+       u32 val;
        u32 exp_cap_off = EXP_CAP_ID_OFFSET;
 
        if (dw_pcie_link_up(pp)) {
@@ -133,9 +133,9 @@ static int spear13xx_pcie_establish_link(struct pcie_port *pp)
 
 static irqreturn_t spear13xx_pcie_irq_handler(int irq, void *arg)
 {
-       struct pcie_port *pp = arg;
-       struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pp);
+       struct spear13xx_pcie *spear13xx_pcie = arg;
        struct pcie_app_reg *app_reg = spear13xx_pcie->app_base;
+       struct pcie_port *pp = &spear13xx_pcie->pp;
        unsigned int status;
 
        status = readl(&app_reg->int_sts);
@@ -150,9 +150,9 @@ static irqreturn_t spear13xx_pcie_irq_handler(int irq, void *arg)
        return IRQ_HANDLED;
 }
 
-static void spear13xx_pcie_enable_interrupts(struct pcie_port *pp)
+static void spear13xx_pcie_enable_interrupts(struct spear13xx_pcie *spear13xx_pcie)
 {
-       struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pp);
+       struct pcie_port *pp = &spear13xx_pcie->pp;
        struct pcie_app_reg *app_reg = spear13xx_pcie->app_base;
 
        /* Enable MSI interrupt */
@@ -176,8 +176,10 @@ static int spear13xx_pcie_link_up(struct pcie_port *pp)
 
 static void spear13xx_pcie_host_init(struct pcie_port *pp)
 {
-       spear13xx_pcie_establish_link(pp);
-       spear13xx_pcie_enable_interrupts(pp);
+       struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pp);
+
+       spear13xx_pcie_establish_link(spear13xx_pcie);
+       spear13xx_pcie_enable_interrupts(spear13xx_pcie);
 }
 
 static struct pcie_host_ops spear13xx_pcie_host_ops = {
@@ -185,9 +187,10 @@ static struct pcie_host_ops spear13xx_pcie_host_ops = {
        .host_init = spear13xx_pcie_host_init,
 };
 
-static int spear13xx_add_pcie_port(struct pcie_port *pp,
-                                        struct platform_device *pdev)
+static int spear13xx_add_pcie_port(struct spear13xx_pcie *spear13xx_pcie,
+                                  struct platform_device *pdev)
 {
+       struct pcie_port *pp = &spear13xx_pcie->pp;
        struct device *dev = &pdev->dev;
        int ret;
 
@@ -198,7 +201,7 @@ static int spear13xx_add_pcie_port(struct pcie_port *pp,
        }
        ret = devm_request_irq(dev, pp->irq, spear13xx_pcie_irq_handler,
                               IRQF_SHARED | IRQF_NO_THREAD,
-                              "spear1340-pcie", pp);
+                              "spear1340-pcie", spear13xx_pcie);
        if (ret) {
                dev_err(dev, "failed to request irq %d\n", pp->irq);
                return ret;
@@ -268,7 +271,7 @@ static int spear13xx_pcie_probe(struct platform_device *pdev)
        if (of_property_read_bool(np, "st,pcie-is-gen1"))
                spear13xx_pcie->is_gen1 = true;
 
-       ret = spear13xx_add_pcie_port(pp, pdev);
+       ret = spear13xx_add_pcie_port(spear13xx_pcie, pdev);
        if (ret < 0)
                goto fail_clk;