diff options
| author | Chia-Wei, Wang <chiawei_wang@aspeedtech.com> | 2021-03-19 09:27:36 +0300 |
|---|---|---|
| committer | Joel Stanley <joel@jms.id.au> | 2021-04-09 07:09:22 +0300 |
| commit | 489774ff5db943642751f4f0fdac9033239208c6 (patch) | |
| tree | d9edcc3fbc4a2c47cae47ccfa78c92e347996345 /drivers/soc/aspeed/aspeed-lpc-snoop.c | |
| parent | eaffd32bea0c93226d4701b1736b04827f754ccf (diff) | |
| download | linux-489774ff5db943642751f4f0fdac9033239208c6.tar.xz | |
soc: aspeed: Adapt to new LPC device tree layout
Add check against LPC device v2 compatible string to
ensure that the fixed device tree layout is adopted.
The LPC register offsets are also fixed accordingly.
Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20210319062752.145730-5-andrew@aj.id.au
Signed-off-by: Joel Stanley <joel@jms.id.au>
Diffstat (limited to 'drivers/soc/aspeed/aspeed-lpc-snoop.c')
| -rw-r--r-- | drivers/soc/aspeed/aspeed-lpc-snoop.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/soc/aspeed/aspeed-lpc-snoop.c b/drivers/soc/aspeed/aspeed-lpc-snoop.c index 20acac6342ef..210455efb321 100644 --- a/drivers/soc/aspeed/aspeed-lpc-snoop.c +++ b/drivers/soc/aspeed/aspeed-lpc-snoop.c @@ -29,26 +29,25 @@ #define NUM_SNOOP_CHANNELS 2 #define SNOOP_FIFO_SIZE 2048 -#define HICR5 0x0 +#define HICR5 0x80 #define HICR5_EN_SNP0W BIT(0) #define HICR5_ENINT_SNP0W BIT(1) #define HICR5_EN_SNP1W BIT(2) #define HICR5_ENINT_SNP1W BIT(3) - -#define HICR6 0x4 +#define HICR6 0x84 #define HICR6_STR_SNP0W BIT(0) #define HICR6_STR_SNP1W BIT(1) -#define SNPWADR 0x10 +#define SNPWADR 0x90 #define SNPWADR_CH0_MASK GENMASK(15, 0) #define SNPWADR_CH0_SHIFT 0 #define SNPWADR_CH1_MASK GENMASK(31, 16) #define SNPWADR_CH1_SHIFT 16 -#define SNPWDR 0x14 +#define SNPWDR 0x94 #define SNPWDR_CH0_MASK GENMASK(7, 0) #define SNPWDR_CH0_SHIFT 0 #define SNPWDR_CH1_MASK GENMASK(15, 8) #define SNPWDR_CH1_SHIFT 8 -#define HICRB 0x80 +#define HICRB 0x100 #define HICRB_ENSNP0D BIT(14) #define HICRB_ENSNP1D BIT(15) @@ -260,6 +259,7 @@ static int aspeed_lpc_snoop_probe(struct platform_device *pdev) { struct aspeed_lpc_snoop *lpc_snoop; struct device *dev; + struct device_node *np; u32 port; int rc; @@ -269,8 +269,15 @@ static int aspeed_lpc_snoop_probe(struct platform_device *pdev) if (!lpc_snoop) return -ENOMEM; - lpc_snoop->regmap = syscon_node_to_regmap( - pdev->dev.parent->of_node); + np = pdev->dev.parent->of_node; + if (!of_device_is_compatible(np, "aspeed,ast2400-lpc-v2") && + !of_device_is_compatible(np, "aspeed,ast2500-lpc-v2") && + !of_device_is_compatible(np, "aspeed,ast2600-lpc-v2")) { + dev_err(dev, "unsupported LPC device binding\n"); + return -ENODEV; + } + + lpc_snoop->regmap = syscon_node_to_regmap(np); if (IS_ERR(lpc_snoop->regmap)) { dev_err(dev, "Couldn't get regmap\n"); return -ENODEV; |