Lines Matching +full:primary +full:- +full:pmic
4 * Author: Chen-Yu Tsai <wens@csie.org>
13 * - it uses addresses set at runtime to address slaves. Runtime addresses
16 * - it adds a parity bit every 8bits of data and address for read and
18 * - only one read access is required to read a byte (instead of a write
20 * - there's no Ack bit after each read access
24 * AXP809, and AXP806 PMICs, and the AC100 audio codec, all from X-Powers.
29 * https://github.com/allwinner-zh/documents/tree/master/A80
33 * This driver is based on i2c-sun6i-p2wi.c, the P2WI bus driver.
38 #include <linux/clk/clk-conf.h>
51 #include <linux/sunxi-rsb.h>
114 #define RSB_CTRL_NAME "sunxi-rsb"
141 const struct sunxi_rsb_driver *drv = to_sunxi_rsb_driver(dev->driver); in sunxi_rsb_device_probe()
145 if (!drv->probe) in sunxi_rsb_device_probe()
146 return -ENODEV; in sunxi_rsb_device_probe()
148 if (!rdev->irq) { in sunxi_rsb_device_probe()
149 int irq = -ENOENT; in sunxi_rsb_device_probe()
151 if (dev->of_node) in sunxi_rsb_device_probe()
152 irq = of_irq_get(dev->of_node, 0); in sunxi_rsb_device_probe()
154 if (irq == -EPROBE_DEFER) in sunxi_rsb_device_probe()
159 rdev->irq = irq; in sunxi_rsb_device_probe()
162 ret = of_clk_set_defaults(dev->of_node, false); in sunxi_rsb_device_probe()
166 return drv->probe(rdev); in sunxi_rsb_device_probe()
171 const struct sunxi_rsb_driver *drv = to_sunxi_rsb_driver(dev->driver); in sunxi_rsb_device_remove()
173 return drv->remove(to_sunxi_rsb_device(dev)); in sunxi_rsb_device_remove()
192 * sunxi_rsb_device_create() - allocate and add an RSB device
206 return ERR_PTR(-ENOMEM); in sunxi_rsb_device_create()
208 rdev->rsb = rsb; in sunxi_rsb_device_create()
209 rdev->hwaddr = hwaddr; in sunxi_rsb_device_create()
210 rdev->rtaddr = rtaddr; in sunxi_rsb_device_create()
211 rdev->dev.bus = &sunxi_rsb_bus; in sunxi_rsb_device_create()
212 rdev->dev.parent = rsb->dev; in sunxi_rsb_device_create()
213 rdev->dev.of_node = node; in sunxi_rsb_device_create()
214 rdev->dev.release = sunxi_rsb_dev_release; in sunxi_rsb_device_create()
216 dev_set_name(&rdev->dev, "%s-%x", RSB_CTRL_NAME, hwaddr); in sunxi_rsb_device_create()
218 err = device_register(&rdev->dev); in sunxi_rsb_device_create()
220 dev_err(&rdev->dev, "Can't add %s, status %d\n", in sunxi_rsb_device_create()
221 dev_name(&rdev->dev), err); in sunxi_rsb_device_create()
225 dev_dbg(&rdev->dev, "device %s registered\n", dev_name(&rdev->dev)); in sunxi_rsb_device_create()
230 put_device(&rdev->dev); in sunxi_rsb_device_create()
241 device_unregister(&rdev->dev); in sunxi_rsb_device_unregister()
248 if (dev->bus == &sunxi_rsb_bus) in sunxi_rsb_remove_devices()
255 * sunxi_rsb_driver_register() - Register device driver with RSB core
256 * @rdrv: device driver to be associated with slave-device.
259 * It is typically called from the driver's module-init function.
263 rdrv->driver.bus = &sunxi_rsb_bus; in sunxi_rsb_driver_register()
264 return driver_register(&rdrv->driver); in sunxi_rsb_driver_register()
274 if (readl(rsb->regs + RSB_CTRL) & RSB_CTRL_START_TRANS) { in _sunxi_rsb_run_xfer()
275 dev_dbg(rsb->dev, "RSB transfer still in progress\n"); in _sunxi_rsb_run_xfer()
276 return -EBUSY; in _sunxi_rsb_run_xfer()
279 reinit_completion(&rsb->complete); in _sunxi_rsb_run_xfer()
282 writel(int_mask, rsb->regs + RSB_INTE); in _sunxi_rsb_run_xfer()
284 rsb->regs + RSB_CTRL); in _sunxi_rsb_run_xfer()
287 timeout = readl_poll_timeout_atomic(rsb->regs + RSB_INTS, in _sunxi_rsb_run_xfer()
290 writel(status, rsb->regs + RSB_INTS); in _sunxi_rsb_run_xfer()
292 timeout = !wait_for_completion_io_timeout(&rsb->complete, in _sunxi_rsb_run_xfer()
294 status = rsb->status; in _sunxi_rsb_run_xfer()
298 dev_dbg(rsb->dev, "RSB timeout\n"); in _sunxi_rsb_run_xfer()
301 writel(RSB_CTRL_ABORT_TRANS, rsb->regs + RSB_CTRL); in _sunxi_rsb_run_xfer()
304 writel(readl(rsb->regs + RSB_INTS), rsb->regs + RSB_INTS); in _sunxi_rsb_run_xfer()
306 return -ETIMEDOUT; in _sunxi_rsb_run_xfer()
310 dev_dbg(rsb->dev, "RSB busy\n"); in _sunxi_rsb_run_xfer()
311 return -EBUSY; in _sunxi_rsb_run_xfer()
316 dev_dbg(rsb->dev, "RSB slave nack\n"); in _sunxi_rsb_run_xfer()
317 return -EINVAL; in _sunxi_rsb_run_xfer()
321 dev_dbg(rsb->dev, "RSB transfer data error\n"); in _sunxi_rsb_run_xfer()
322 return -EIO; in _sunxi_rsb_run_xfer()
336 return -EINVAL; in sunxi_rsb_read()
349 dev_err(rsb->dev, "Invalid access width: %zd\n", len); in sunxi_rsb_read()
350 return -EINVAL; in sunxi_rsb_read()
353 mutex_lock(&rsb->lock); in sunxi_rsb_read()
355 writel(addr, rsb->regs + RSB_ADDR); in sunxi_rsb_read()
356 writel(RSB_DAR_RTA(rtaddr), rsb->regs + RSB_DAR); in sunxi_rsb_read()
357 writel(cmd, rsb->regs + RSB_CMD); in sunxi_rsb_read()
363 *buf = readl(rsb->regs + RSB_DATA) & GENMASK(len * 8 - 1, 0); in sunxi_rsb_read()
366 mutex_unlock(&rsb->lock); in sunxi_rsb_read()
378 return -EINVAL; in sunxi_rsb_write()
391 dev_err(rsb->dev, "Invalid access width: %zd\n", len); in sunxi_rsb_write()
392 return -EINVAL; in sunxi_rsb_write()
395 mutex_lock(&rsb->lock); in sunxi_rsb_write()
397 writel(addr, rsb->regs + RSB_ADDR); in sunxi_rsb_write()
398 writel(RSB_DAR_RTA(rtaddr), rsb->regs + RSB_DAR); in sunxi_rsb_write()
399 writel(*buf, rsb->regs + RSB_DATA); in sunxi_rsb_write()
400 writel(cmd, rsb->regs + RSB_CMD); in sunxi_rsb_write()
403 mutex_unlock(&rsb->lock); in sunxi_rsb_write()
418 struct sunxi_rsb_device *rdev = ctx->rdev; in regmap_sunxi_rsb_reg_read()
421 return -EINVAL; in regmap_sunxi_rsb_reg_read()
423 return sunxi_rsb_read(rdev->rsb, rdev->rtaddr, reg, val, ctx->size); in regmap_sunxi_rsb_reg_read()
430 struct sunxi_rsb_device *rdev = ctx->rdev; in regmap_sunxi_rsb_reg_write()
432 return sunxi_rsb_write(rdev->rsb, rdev->rtaddr, reg, &val, ctx->size); in regmap_sunxi_rsb_reg_write()
455 switch (config->val_bits) { in regmap_sunxi_rsb_init_ctx()
461 return ERR_PTR(-EINVAL); in regmap_sunxi_rsb_init_ctx()
466 return ERR_PTR(-ENOMEM); in regmap_sunxi_rsb_init_ctx()
468 ctx->rdev = rdev; in regmap_sunxi_rsb_init_ctx()
469 ctx->size = config->val_bits / 8; in regmap_sunxi_rsb_init_ctx()
484 return __devm_regmap_init(&rdev->dev, ®map_sunxi_rsb, ctx, config, in __devm_regmap_init_sunxi_rsb()
495 status = readl(rsb->regs + RSB_INTS); in sunxi_rsb_irq()
496 rsb->status = status; in sunxi_rsb_irq()
501 writel(status, rsb->regs + RSB_INTS); in sunxi_rsb_irq()
503 complete(&rsb->complete); in sunxi_rsb_irq()
515 RSB_DMCR_MODE_REG | RSB_DMCR_DEV_ADDR, rsb->regs + RSB_DMCR); in sunxi_rsb_init_device_mode()
517 readl_poll_timeout(rsb->regs + RSB_DMCR, reg, in sunxi_rsb_init_device_mode()
520 ret = -ETIMEDOUT; in sunxi_rsb_init_device_mode()
523 writel(readl(rsb->regs + RSB_INTS), rsb->regs + RSB_INTS); in sunxi_rsb_init_device_mode()
537 * use 0x2d for the primary PMIC, 0x3a for the secondary PMIC if
540 * The hardware does not seem to support re-setting runtime addresses.
546 { 0x3a3, 0x2d }, /* Primary PMIC: AXP223, AXP809, AXP81X, ... */
547 { 0x745, 0x3a }, /* Secondary PMIC: AXP806, ... */
564 struct device *dev = rsb->dev; in of_rsb_register_devices()
565 struct device_node *child, *np = dev->of_node; in of_rsb_register_devices()
571 return -EINVAL; in of_rsb_register_devices()
598 writel(RSB_CMD_STRA, rsb->regs + RSB_CMD); in of_rsb_register_devices()
600 rsb->regs + RSB_DAR); in of_rsb_register_devices()
633 { .compatible = "allwinner,sun8i-a23-rsb" },
640 struct device *dev = &pdev->dev; in sunxi_rsb_probe()
641 struct device_node *np = dev->of_node; in sunxi_rsb_probe()
649 of_property_read_u32(np, "clock-frequency", &clk_freq); in sunxi_rsb_probe()
652 "clock-frequency (%u Hz) is too high (max = 20MHz)\n", in sunxi_rsb_probe()
654 return -EINVAL; in sunxi_rsb_probe()
659 return -ENOMEM; in sunxi_rsb_probe()
661 rsb->dev = dev; in sunxi_rsb_probe()
664 rsb->regs = devm_ioremap_resource(dev, r); in sunxi_rsb_probe()
665 if (IS_ERR(rsb->regs)) in sunxi_rsb_probe()
666 return PTR_ERR(rsb->regs); in sunxi_rsb_probe()
672 rsb->clk = devm_clk_get(dev, NULL); in sunxi_rsb_probe()
673 if (IS_ERR(rsb->clk)) { in sunxi_rsb_probe()
674 ret = PTR_ERR(rsb->clk); in sunxi_rsb_probe()
679 ret = clk_prepare_enable(rsb->clk); in sunxi_rsb_probe()
685 p_clk_freq = clk_get_rate(rsb->clk); in sunxi_rsb_probe()
687 rsb->rstc = devm_reset_control_get(dev, NULL); in sunxi_rsb_probe()
688 if (IS_ERR(rsb->rstc)) { in sunxi_rsb_probe()
689 ret = PTR_ERR(rsb->rstc); in sunxi_rsb_probe()
694 ret = reset_control_deassert(rsb->rstc); in sunxi_rsb_probe()
700 init_completion(&rsb->complete); in sunxi_rsb_probe()
701 mutex_init(&rsb->lock); in sunxi_rsb_probe()
704 writel(RSB_CTRL_SOFT_RST, rsb->regs + RSB_CTRL); in sunxi_rsb_probe()
705 readl_poll_timeout(rsb->regs + RSB_CTRL, reg, in sunxi_rsb_probe()
710 * Allwinner U-boot sources. in sunxi_rsb_probe()
726 writel(RSB_CCR_SDA_OUT_DELAY(clk_delay) | RSB_CCR_CLK_DIV(clk_div - 1), in sunxi_rsb_probe()
727 rsb->regs + RSB_CCR); in sunxi_rsb_probe()
746 reset_control_assert(rsb->rstc); in sunxi_rsb_probe()
749 clk_disable_unprepare(rsb->clk); in sunxi_rsb_probe()
758 device_for_each_child(rsb->dev, NULL, sunxi_rsb_remove_devices); in sunxi_rsb_remove()
759 reset_control_assert(rsb->rstc); in sunxi_rsb_remove()
760 clk_disable_unprepare(rsb->clk); in sunxi_rsb_remove()
801 MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>");