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author | Yegor Yefremov <yegorslists@googlemail.com> | 2017-02-17 16:52:33 +0100 |
---|---|---|
committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2017-04-04 16:55:26 +0200 |
commit | dabf54dd1c6369160f8d4c793a8613dfb4e7848a (patch) | |
tree | 86872117e13cd04e58abc74d4796213737c291cc /drivers/net/can/ti_hecc.c | |
parent | 869a78a2be13055173dc1fbe87f49e338e59f7ef (diff) | |
download | linux-dabf54dd1c6369160f8d4c793a8613dfb4e7848a.tar.gz linux-dabf54dd1c6369160f8d4c793a8613dfb4e7848a.tar.bz2 linux-dabf54dd1c6369160f8d4c793a8613dfb4e7848a.zip |
can: ti_hecc: Convert TI HECC driver to DT only driver
This patch converts TI HECC driver to DT only driver. This results in
removing ti_hecc.h containing now obsolete platform data.
Former transceiver_switch callback function will be now modelled via
regulator API.
Signed-off-by: Anton Glukhov <anton.a.glukhov@gmail.com>
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can/ti_hecc.c')
-rw-r--r-- | drivers/net/can/ti_hecc.c | 170 |
1 files changed, 88 insertions, 82 deletions
diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c index 6749b1829469..b8aac538275c 100644 --- a/drivers/net/can/ti_hecc.c +++ b/drivers/net/can/ti_hecc.c @@ -17,25 +17,6 @@ * */ -/* - * Your platform definitions should specify module ram offsets and interrupt - * number to use as follows: - * - * static struct ti_hecc_platform_data am3517_evm_hecc_pdata = { - * .scc_hecc_offset = 0, - * .scc_ram_offset = 0x3000, - * .hecc_ram_offset = 0x3000, - * .mbx_offset = 0x2000, - * .int_line = 0, - * .revision = 1, - * .transceiver_switch = hecc_phy_control, - * }; - * - * Please see include/linux/can/platform/ti_hecc.h for description of - * above fields. - * - */ - #include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> @@ -46,11 +27,13 @@ #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/io.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/regulator/consumer.h> #include <linux/can/dev.h> #include <linux/can/error.h> #include <linux/can/led.h> -#include <linux/can/platform/ti_hecc.h> #define DRV_NAME "ti_hecc" #define HECC_MODULE_VERSION "0.7" @@ -214,15 +197,14 @@ struct ti_hecc_priv { struct net_device *ndev; struct clk *clk; void __iomem *base; - u32 scc_ram_offset; - u32 hecc_ram_offset; - u32 mbx_offset; - u32 int_line; + void __iomem *hecc_ram; + void __iomem *mbx; + bool use_hecc1int; spinlock_t mbx_lock; /* CANME register needs protection */ u32 tx_head; u32 tx_tail; u32 rx_next; - void (*transceiver_switch)(int); + struct regulator *reg_xceiver; }; static inline int get_tx_head_mb(struct ti_hecc_priv *priv) @@ -242,20 +224,18 @@ static inline int get_tx_head_prio(struct ti_hecc_priv *priv) static inline void hecc_write_lam(struct ti_hecc_priv *priv, u32 mbxno, u32 val) { - __raw_writel(val, priv->base + priv->hecc_ram_offset + mbxno * 4); + __raw_writel(val, priv->hecc_ram + mbxno * 4); } static inline void hecc_write_mbx(struct ti_hecc_priv *priv, u32 mbxno, u32 reg, u32 val) { - __raw_writel(val, priv->base + priv->mbx_offset + mbxno * 0x10 + - reg); + __raw_writel(val, priv->mbx + mbxno * 0x10 + reg); } static inline u32 hecc_read_mbx(struct ti_hecc_priv *priv, u32 mbxno, u32 reg) { - return __raw_readl(priv->base + priv->mbx_offset + mbxno * 0x10 + - reg); + return __raw_readl(priv->mbx + mbxno * 0x10 + reg); } static inline void hecc_write(struct ti_hecc_priv *priv, u32 reg, u32 val) @@ -311,11 +291,16 @@ static int ti_hecc_set_btc(struct ti_hecc_priv *priv) return 0; } -static void ti_hecc_transceiver_switch(const struct ti_hecc_priv *priv, - int on) +static int ti_hecc_transceiver_switch(const struct ti_hecc_priv *priv, + int on) { - if (priv->transceiver_switch) - priv->transceiver_switch(on); + if (!priv->reg_xceiver) + return 0; + + if (on) + return regulator_enable(priv->reg_xceiver); + else + return regulator_disable(priv->reg_xceiver); } static void ti_hecc_reset(struct net_device *ndev) @@ -409,7 +394,7 @@ static void ti_hecc_start(struct net_device *ndev) /* Prevent message over-write & Enable interrupts */ hecc_write(priv, HECC_CANOPC, HECC_SET_REG); - if (priv->int_line) { + if (priv->use_hecc1int) { hecc_write(priv, HECC_CANMIL, HECC_SET_REG); hecc_write(priv, HECC_CANGIM, HECC_CANGIM_DEF_MASK | HECC_CANGIM_I1EN | HECC_CANGIM_SIL); @@ -760,7 +745,7 @@ static irqreturn_t ti_hecc_interrupt(int irq, void *dev_id) unsigned long ack, flags; int_status = hecc_read(priv, - (priv->int_line) ? HECC_CANGIF1 : HECC_CANGIF0); + (priv->use_hecc1int) ? HECC_CANGIF1 : HECC_CANGIF0); if (!int_status) return IRQ_NONE; @@ -806,7 +791,7 @@ static irqreturn_t ti_hecc_interrupt(int irq, void *dev_id) } /* clear all interrupt conditions - read back to avoid spurious ints */ - if (priv->int_line) { + if (priv->use_hecc1int) { hecc_write(priv, HECC_CANGIF1, HECC_SET_REG); int_status = hecc_read(priv, HECC_CANGIF1); } else { @@ -872,58 +857,87 @@ static const struct net_device_ops ti_hecc_netdev_ops = { .ndo_change_mtu = can_change_mtu, }; +static const struct of_device_id ti_hecc_dt_ids[] = { + { + .compatible = "ti,am3517-hecc", + }, + { } +}; +MODULE_DEVICE_TABLE(of, ti_hecc_dt_ids); + static int ti_hecc_probe(struct platform_device *pdev) { struct net_device *ndev = (struct net_device *)0; struct ti_hecc_priv *priv; - struct ti_hecc_platform_data *pdata; - struct resource *mem, *irq; - void __iomem *addr; + struct device_node *np = pdev->dev.of_node; + struct resource *res, *irq; + struct regulator *reg_xceiver; int err = -ENODEV; - pdata = dev_get_platdata(&pdev->dev); - if (!pdata) { - dev_err(&pdev->dev, "No platform data\n"); - goto probe_exit; + if (!IS_ENABLED(CONFIG_OF) || !np) + return -EINVAL; + + reg_xceiver = devm_regulator_get(&pdev->dev, "xceiver"); + if (PTR_ERR(reg_xceiver) == -EPROBE_DEFER) + return -EPROBE_DEFER; + else if (IS_ERR(reg_xceiver)) + reg_xceiver = NULL; + + ndev = alloc_candev(sizeof(struct ti_hecc_priv), HECC_MAX_TX_MBOX); + if (!ndev) { + dev_err(&pdev->dev, "alloc_candev failed\n"); + return -ENOMEM; } + priv = netdev_priv(ndev); - mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!mem) { - dev_err(&pdev->dev, "No mem resources\n"); - goto probe_exit; + /* handle hecc memory */ + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hecc"); + if (!res) { + dev_err(&pdev->dev, "can't get IORESOURCE_MEM hecc\n"); + return -EINVAL; } - irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!irq) { - dev_err(&pdev->dev, "No irq resource\n"); - goto probe_exit; + + priv->base = devm_ioremap_resource(&pdev->dev, res); + if (!priv->base) { + dev_err(&pdev->dev, "hecc ioremap failed\n"); + return -ENOMEM; } - if (!request_mem_region(mem->start, resource_size(mem), pdev->name)) { - dev_err(&pdev->dev, "HECC region already claimed\n"); - err = -EBUSY; - goto probe_exit; + + /* handle hecc-ram memory */ + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hecc-ram"); + if (!res) { + dev_err(&pdev->dev, "can't get IORESOURCE_MEM hecc-ram\n"); + return -EINVAL; } - addr = ioremap(mem->start, resource_size(mem)); - if (!addr) { - dev_err(&pdev->dev, "ioremap failed\n"); - err = -ENOMEM; - goto probe_exit_free_region; + + priv->hecc_ram = devm_ioremap_resource(&pdev->dev, res); + if (!priv->hecc_ram) { + dev_err(&pdev->dev, "hecc-ram ioremap failed\n"); + return -ENOMEM; } - ndev = alloc_candev(sizeof(struct ti_hecc_priv), HECC_MAX_TX_MBOX); - if (!ndev) { - dev_err(&pdev->dev, "alloc_candev failed\n"); - err = -ENOMEM; - goto probe_exit_iounmap; + /* handle mbx memory */ + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mbx"); + if (!res) { + dev_err(&pdev->dev, "can't get IORESOURCE_MEM mbx\n"); + return -EINVAL; + } + + priv->mbx = devm_ioremap_resource(&pdev->dev, res); + if (!priv->mbx) { + dev_err(&pdev->dev, "mbx ioremap failed\n"); + return -ENOMEM; + } + + irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!irq) { + dev_err(&pdev->dev, "No irq resource\n"); + goto probe_exit; } - priv = netdev_priv(ndev); priv->ndev = ndev; - priv->base = addr; - priv->scc_ram_offset = pdata->scc_ram_offset; - priv->hecc_ram_offset = pdata->hecc_ram_offset; - priv->mbx_offset = pdata->mbx_offset; - priv->int_line = pdata->int_line; - priv->transceiver_switch = pdata->transceiver_switch; + priv->reg_xceiver = reg_xceiver; + priv->use_hecc1int = of_property_read_bool(np, "ti,use-hecc1int"); priv->can.bittiming_const = &ti_hecc_bittiming_const; priv->can.do_set_mode = ti_hecc_do_set_mode; @@ -971,32 +985,23 @@ probe_exit_clk: clk_put(priv->clk); probe_exit_candev: free_candev(ndev); -probe_exit_iounmap: - iounmap(addr); -probe_exit_free_region: - release_mem_region(mem->start, resource_size(mem)); probe_exit: return err; } static int ti_hecc_remove(struct platform_device *pdev) { - struct resource *res; struct net_device *ndev = platform_get_drvdata(pdev); struct ti_hecc_priv *priv = netdev_priv(ndev); unregister_candev(ndev); clk_disable_unprepare(priv->clk); clk_put(priv->clk); - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - iounmap(priv->base); - release_mem_region(res->start, resource_size(res)); free_candev(ndev); return 0; } - #ifdef CONFIG_PM static int ti_hecc_suspend(struct platform_device *pdev, pm_message_t state) { @@ -1045,6 +1050,7 @@ static int ti_hecc_resume(struct platform_device *pdev) static struct platform_driver ti_hecc_driver = { .driver = { .name = DRV_NAME, + .of_match_table = ti_hecc_dt_ids, }, .probe = ti_hecc_probe, .remove = ti_hecc_remove, |