diff options
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/aspeed-lpc-snoop.c | 34 |
1 files changed, 29 insertions, 5 deletions
diff --git a/drivers/misc/aspeed-lpc-snoop.c b/drivers/misc/aspeed-lpc-snoop.c index 593905565b74..cb78c98bc78d 100644 --- a/drivers/misc/aspeed-lpc-snoop.c +++ b/drivers/misc/aspeed-lpc-snoop.c @@ -20,6 +20,7 @@ #include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/of.h> +#include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/regmap.h> @@ -51,6 +52,13 @@ #define HICRB_ENSNP0D BIT(14) #define HICRB_ENSNP1D BIT(15) +struct aspeed_lpc_snoop_model_data { + /* The ast2400 has bits 14 and 15 as reserved, whereas the ast2500 + * can use them. + */ + unsigned int has_hicrb_ensnp; +}; + struct aspeed_lpc_snoop { struct regmap *regmap; int irq; @@ -123,10 +131,13 @@ static int aspeed_lpc_snoop_config_irq(struct aspeed_lpc_snoop *lpc_snoop, } static int aspeed_lpc_enable_snoop(struct aspeed_lpc_snoop *lpc_snoop, - int channel, u16 lpc_port) + struct device *dev, + int channel, u16 lpc_port) { int rc = 0; u32 hicr5_en, snpwadr_mask, snpwadr_shift, hicrb_en; + const struct aspeed_lpc_snoop_model_data *model_data = + of_device_get_match_data(dev); /* Create FIFO datastructure */ rc = kfifo_alloc(&lpc_snoop->snoop_fifo[channel], @@ -155,7 +166,9 @@ static int aspeed_lpc_enable_snoop(struct aspeed_lpc_snoop *lpc_snoop, regmap_update_bits(lpc_snoop->regmap, HICR5, hicr5_en, hicr5_en); regmap_update_bits(lpc_snoop->regmap, SNPWADR, snpwadr_mask, lpc_port << snpwadr_shift); - regmap_update_bits(lpc_snoop->regmap, HICRB, hicrb_en, hicrb_en); + if (model_data->has_hicrb_ensnp) + regmap_update_bits(lpc_snoop->regmap, HICRB, + hicrb_en, hicrb_en); return rc; } @@ -213,14 +226,14 @@ static int aspeed_lpc_snoop_probe(struct platform_device *pdev) if (rc) return rc; - rc = aspeed_lpc_enable_snoop(lpc_snoop, 0, port); + rc = aspeed_lpc_enable_snoop(lpc_snoop, dev, 0, port); if (rc) return rc; /* Configuration of 2nd snoop channel port is optional */ if (of_property_read_u32_index(dev->of_node, "snoop-ports", 1, &port) == 0) { - rc = aspeed_lpc_enable_snoop(lpc_snoop, 1, port); + rc = aspeed_lpc_enable_snoop(lpc_snoop, dev, 1, port); if (rc) aspeed_lpc_disable_snoop(lpc_snoop, 0); } @@ -239,8 +252,19 @@ static int aspeed_lpc_snoop_remove(struct platform_device *pdev) return 0; } +static const struct aspeed_lpc_snoop_model_data ast2400_model_data = { + .has_hicrb_ensnp = 0, +}; + +static const struct aspeed_lpc_snoop_model_data ast2500_model_data = { + .has_hicrb_ensnp = 1, +}; + static const struct of_device_id aspeed_lpc_snoop_match[] = { - { .compatible = "aspeed,ast2500-lpc-snoop" }, + { .compatible = "aspeed,ast2400-lpc-snoop", + .data = &ast2400_model_data }, + { .compatible = "aspeed,ast2500-lpc-snoop", + .data = &ast2500_model_data }, { }, }; |