diff options
Diffstat (limited to 'drivers/char/ipmi/bt-bmc.c')
| -rw-r--r-- | drivers/char/ipmi/bt-bmc.c | 69 |
1 files changed, 17 insertions, 52 deletions
diff --git a/drivers/char/ipmi/bt-bmc.c b/drivers/char/ipmi/bt-bmc.c index 6e3d247b55d1..7450904e330a 100644 --- a/drivers/char/ipmi/bt-bmc.c +++ b/drivers/char/ipmi/bt-bmc.c @@ -8,13 +8,11 @@ #include <linux/errno.h> #include <linux/interrupt.h> #include <linux/io.h> -#include <linux/mfd/syscon.h> #include <linux/miscdevice.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/poll.h> -#include <linux/regmap.h> #include <linux/sched.h> #include <linux/timer.h> @@ -59,8 +57,7 @@ struct bt_bmc { struct device dev; struct miscdevice miscdev; - struct regmap *map; - int offset; + void __iomem *base; int irq; wait_queue_head_t queue; struct timer_list poll_timer; @@ -69,29 +66,14 @@ struct bt_bmc { static atomic_t open_count = ATOMIC_INIT(0); -static const struct regmap_config bt_regmap_cfg = { - .reg_bits = 32, - .val_bits = 32, - .reg_stride = 4, -}; - static u8 bt_inb(struct bt_bmc *bt_bmc, int reg) { - uint32_t val = 0; - int rc; - - rc = regmap_read(bt_bmc->map, bt_bmc->offset + reg, &val); - WARN(rc != 0, "regmap_read() failed: %d\n", rc); - - return rc == 0 ? (u8) val : 0; + return readb(bt_bmc->base + reg); } static void bt_outb(struct bt_bmc *bt_bmc, u8 data, int reg) { - int rc; - - rc = regmap_write(bt_bmc->map, bt_bmc->offset + reg, data); - WARN(rc != 0, "regmap_write() failed: %d\n", rc); + writeb(data, bt_bmc->base + reg); } static void clr_rd_ptr(struct bt_bmc *bt_bmc) @@ -376,18 +358,15 @@ static irqreturn_t bt_bmc_irq(int irq, void *arg) { struct bt_bmc *bt_bmc = arg; u32 reg; - int rc; - rc = regmap_read(bt_bmc->map, bt_bmc->offset + BT_CR2, ®); - if (rc) - return IRQ_NONE; + reg = readl(bt_bmc->base + BT_CR2); reg &= BT_CR2_IRQ_H2B | BT_CR2_IRQ_HBUSY; if (!reg) return IRQ_NONE; /* ack pending IRQs */ - regmap_write(bt_bmc->map, bt_bmc->offset + BT_CR2, reg); + writel(reg, bt_bmc->base + BT_CR2); wake_up(&bt_bmc->queue); return IRQ_HANDLED; @@ -398,6 +377,7 @@ static int bt_bmc_config_irq(struct bt_bmc *bt_bmc, { struct device *dev = &pdev->dev; int rc; + u32 reg; bt_bmc->irq = platform_get_irq_optional(pdev, 0); if (bt_bmc->irq < 0) @@ -417,11 +397,11 @@ static int bt_bmc_config_irq(struct bt_bmc *bt_bmc, * will be cleared (along with B2H) when we can write the next * message to the BT buffer */ - rc = regmap_update_bits(bt_bmc->map, bt_bmc->offset + BT_CR1, - (BT_CR1_IRQ_H2B | BT_CR1_IRQ_HBUSY), - (BT_CR1_IRQ_H2B | BT_CR1_IRQ_HBUSY)); + reg = readl(bt_bmc->base + BT_CR1); + reg |= BT_CR1_IRQ_H2B | BT_CR1_IRQ_HBUSY; + writel(reg, bt_bmc->base + BT_CR1); - return rc; + return 0; } static int bt_bmc_probe(struct platform_device *pdev) @@ -439,25 +419,9 @@ static int bt_bmc_probe(struct platform_device *pdev) dev_set_drvdata(&pdev->dev, bt_bmc); - bt_bmc->map = syscon_node_to_regmap(pdev->dev.parent->of_node); - if (IS_ERR(bt_bmc->map)) { - void __iomem *base; - - /* - * Assume it's not the MFD-based devicetree description, in - * which case generate a regmap ourselves - */ - base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(base)) - return PTR_ERR(base); - - bt_bmc->map = devm_regmap_init_mmio(dev, base, &bt_regmap_cfg); - bt_bmc->offset = 0; - } else { - rc = of_property_read_u32(dev->of_node, "reg", &bt_bmc->offset); - if (rc) - return rc; - } + bt_bmc->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(bt_bmc->base)) + return PTR_ERR(bt_bmc->base); mutex_init(&bt_bmc->mutex); init_waitqueue_head(&bt_bmc->queue); @@ -483,12 +447,12 @@ static int bt_bmc_probe(struct platform_device *pdev) add_timer(&bt_bmc->poll_timer); } - regmap_write(bt_bmc->map, bt_bmc->offset + BT_CR0, - (BT_IO_BASE << BT_CR0_IO_BASE) | + writel((BT_IO_BASE << BT_CR0_IO_BASE) | (BT_IRQ << BT_CR0_IRQ) | BT_CR0_EN_CLR_SLV_RDP | BT_CR0_EN_CLR_SLV_WRP | - BT_CR0_ENABLE_IBT); + BT_CR0_ENABLE_IBT, + bt_bmc->base + BT_CR0); clr_b_busy(bt_bmc); @@ -508,6 +472,7 @@ static int bt_bmc_remove(struct platform_device *pdev) static const struct of_device_id bt_bmc_match[] = { { .compatible = "aspeed,ast2400-ibt-bmc" }, { .compatible = "aspeed,ast2500-ibt-bmc" }, + { .compatible = "aspeed,ast2600-ibt-bmc" }, { }, }; |