diff options
| -rw-r--r-- | drivers/mfd/atmel-hlcdc.c | 51 |
1 files changed, 45 insertions, 6 deletions
diff --git a/drivers/mfd/atmel-hlcdc.c b/drivers/mfd/atmel-hlcdc.c index cfd58f4..d1d6e8f 100644 --- a/drivers/mfd/atmel-hlcdc.c +++ b/drivers/mfd/atmel-hlcdc.c @@ -18,6 +18,7 @@ */ #include <linux/clk.h> +#include <linux/iopoll.h> #include <linux/mfd/atmel-hlcdc.h> #include <linux/mfd/core.h> #include <linux/module.h> @@ -26,6 +27,10 @@ #define ATMEL_HLCDC_REG_MAX (0x4000 - 0x4) +struct atmel_hlcdc_regmap { + void __iomem *regs; +}; + static const struct mfd_cell atmel_hlcdc_cells[] = { { .name = "atmel-hlcdc-pwm", @@ -37,28 +42,62 @@ static const struct mfd_cell atmel_hlcdc_cells[] = { }, }; +static int regmap_atmel_hlcdc_reg_write(void *context, unsigned int reg, + unsigned int val) +{ + struct atmel_hlcdc_regmap *hregmap = context; + + if (reg <= ATMEL_HLCDC_DIS) { + u32 status; + + readl_poll_timeout(hregmap->regs + ATMEL_HLCDC_SR, status, + !(status & ATMEL_HLCDC_SIP), 1, 100); + } + + writel(val, hregmap->regs + reg); + + return 0; +} + +static int regmap_atmel_hlcdc_reg_read(void *context, unsigned int reg, + unsigned int *val) +{ + struct atmel_hlcdc_regmap *hregmap = context; + + *val = readl(hregmap->regs + reg); + + return 0; +} + static const struct regmap_config atmel_hlcdc_regmap_config = { .reg_bits = 32, .val_bits = 32, .reg_stride = 4, .max_register = ATMEL_HLCDC_REG_MAX, + .reg_write = regmap_atmel_hlcdc_reg_write, + .reg_read = regmap_atmel_hlcdc_reg_read, + .fast_io = true, }; static int atmel_hlcdc_probe(struct platform_device *pdev) { + struct atmel_hlcdc_regmap *hregmap; struct device *dev = &pdev->dev; struct atmel_hlcdc *hlcdc; struct resource *res; - void __iomem *regs; + + hregmap = devm_kzalloc(dev, sizeof(*hregmap), GFP_KERNEL); + if (!hregmap) + return -ENOMEM; hlcdc = devm_kzalloc(dev, sizeof(*hlcdc), GFP_KERNEL); if (!hlcdc) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - regs = devm_ioremap_resource(dev, res); - if (IS_ERR(regs)) - return PTR_ERR(regs); + hregmap->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(hregmap->regs)) + return PTR_ERR(hregmap->regs); hlcdc->irq = platform_get_irq(pdev, 0); if (hlcdc->irq < 0) @@ -82,8 +121,8 @@ static int atmel_hlcdc_probe(struct platform_device *pdev) return PTR_ERR(hlcdc->slow_clk); } - hlcdc->regmap = devm_regmap_init_mmio(dev, regs, - &atmel_hlcdc_regmap_config); + hlcdc->regmap = devm_regmap_init(dev, NULL, hregmap, + &atmel_hlcdc_regmap_config); if (IS_ERR(hlcdc->regmap)) return PTR_ERR(hlcdc->regmap); |
