diff options
Diffstat (limited to 'drivers/net/can/c_can/c_can_platform.c')
| -rw-r--r-- | drivers/net/can/c_can/c_can_platform.c | 36 |
1 files changed, 32 insertions, 4 deletions
diff --git a/drivers/net/can/c_can/c_can_platform.c b/drivers/net/can/c_can/c_can_platform.c index ee1416132aba..d63b91904f82 100644 --- a/drivers/net/can/c_can/c_can_platform.c +++ b/drivers/net/can/c_can/c_can_platform.c @@ -38,6 +38,8 @@ #include "c_can.h" +#define CAN_RAMINIT_START_MASK(i) (1 << (i)) + /* * 16-bit c_can registers can be arranged differently in the memory * architecture of different implementations. For example: 16-bit @@ -68,6 +70,18 @@ static void c_can_plat_write_reg_aligned_to_32bit(struct c_can_priv *priv, writew(val, priv->base + 2 * priv->regs[index]); } +static void c_can_hw_raminit(const struct c_can_priv *priv, bool enable) +{ + u32 val; + + val = readl(priv->raminit_ctrlreg); + if (enable) + val |= CAN_RAMINIT_START_MASK(priv->instance); + else + val &= ~CAN_RAMINIT_START_MASK(priv->instance); + writel(val, priv->raminit_ctrlreg); +} + static struct platform_device_id c_can_id_table[] = { [BOSCH_C_CAN_PLATFORM] = { .name = KBUILD_MODNAME, @@ -83,14 +97,16 @@ static struct platform_device_id c_can_id_table[] = { }, { } }; +MODULE_DEVICE_TABLE(platform, c_can_id_table); static const struct of_device_id c_can_of_table[] = { { .compatible = "bosch,c_can", .data = &c_can_id_table[BOSCH_C_CAN] }, { .compatible = "bosch,d_can", .data = &c_can_id_table[BOSCH_D_CAN] }, { /* sentinel */ }, }; +MODULE_DEVICE_TABLE(of, c_can_of_table); -static int __devinit c_can_plat_probe(struct platform_device *pdev) +static int c_can_plat_probe(struct platform_device *pdev) { int ret; void __iomem *addr; @@ -99,7 +115,7 @@ static int __devinit c_can_plat_probe(struct platform_device *pdev) const struct of_device_id *match; const struct platform_device_id *id; struct pinctrl *pinctrl; - struct resource *mem; + struct resource *mem, *res; int irq; struct clk *clk; @@ -178,6 +194,18 @@ static int __devinit c_can_plat_probe(struct platform_device *pdev) priv->can.ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES; priv->read_reg = c_can_plat_read_reg_aligned_to_16bit; priv->write_reg = c_can_plat_write_reg_aligned_to_16bit; + + if (pdev->dev.of_node) + priv->instance = of_alias_get_id(pdev->dev.of_node, "d_can"); + else + priv->instance = pdev->id; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + priv->raminit_ctrlreg = devm_request_and_ioremap(&pdev->dev, res); + if (!priv->raminit_ctrlreg || priv->instance < 0) + dev_info(&pdev->dev, "control memory is not used for raminit\n"); + else + priv->raminit = c_can_hw_raminit; break; default: ret = -EINVAL; @@ -220,7 +248,7 @@ exit: return ret; } -static int __devexit c_can_plat_remove(struct platform_device *pdev) +static int c_can_plat_remove(struct platform_device *pdev) { struct net_device *dev = platform_get_drvdata(pdev); struct c_can_priv *priv = netdev_priv(dev); @@ -306,7 +334,7 @@ static struct platform_driver c_can_plat_driver = { .of_match_table = of_match_ptr(c_can_of_table), }, .probe = c_can_plat_probe, - .remove = __devexit_p(c_can_plat_remove), + .remove = c_can_plat_remove, .suspend = c_can_suspend, .resume = c_can_resume, .id_table = c_can_id_table, |