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drivers/misc: (aspeed-lpc-snoop): Add ast2400 to compat 

This driver can be used on the aspeed ast2400 with minor
modifications.

Tested: ast2400 on quanta-q71l

Signed-off-by: Patrick Venture <venture@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Patrick Venture 2017-07-06 10:03:46 -07:00 committed by Greg Kroah-Hartman
parent dd018597a0
commit 2dee584bc9
1 changed files with 29 additions and 5 deletions
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32
drivers/misc/aspeed-lpc-snoop.c
View File

@ -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,
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 },
{ },
};