Hello,
This is a short series reworking the devicetree binding and driver for the
ASPEED BMC KCS devices. With the number of supported ASPEED BMC devicetrees the
changes enable removal of more than 100 lines of warning output from dtc.
These changes are extracted from an RFC series posted previously, which can be
found here:
https://lore.kernel.org/lkml/[email protected]/
Haiyue has already reviewed the driver patches in that thread so the re-posting
carries his tags. Since the original series the patches have been rebased on
top of char-misc/master with no further changes. However, please take a look to
make sure the patches are still sane.
Cheers,
Andrew
Andrew Jeffery (3):
dt-bindings: ipmi: aspeed: Introduce a v2 binding for KCS
ipmi: kcs: Finish configuring ASPEED KCS device before enable
ipmi: kcs: aspeed: Implement v2 bindings
Documentation/devicetree/bindings/ipmi/aspeed-kcs-bmc.txt | 20 +-
drivers/char/ipmi/kcs_bmc_aspeed.c | 151 +++++--
2 files changed, 139 insertions(+), 32 deletions(-)
base-commit: 937d6eefc716a9071f0e3bada19200de1bb9d048
--
git-series 0.9.1
The currently interrupts are configured after the channel was enabled.
Signed-off-by: Andrew Jeffery <[email protected]>
Reviewed-by: Joel Stanley <[email protected]>
Reviewed-by: Haiyue Wang <[email protected]>
---
drivers/char/ipmi/kcs_bmc_aspeed.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/char/ipmi/kcs_bmc_aspeed.c b/drivers/char/ipmi/kcs_bmc_aspeed.c
index 3c955946e647..e3dd09022589 100644
--- a/drivers/char/ipmi/kcs_bmc_aspeed.c
+++ b/drivers/char/ipmi/kcs_bmc_aspeed.c
@@ -268,13 +268,14 @@ static int aspeed_kcs_probe(struct platform_device *pdev)
kcs_bmc->io_inputb = aspeed_kcs_inb;
kcs_bmc->io_outputb = aspeed_kcs_outb;
+ rc = aspeed_kcs_config_irq(kcs_bmc, pdev);
+ if (rc)
+ return rc;
+
dev_set_drvdata(dev, kcs_bmc);
aspeed_kcs_set_address(kcs_bmc, addr);
aspeed_kcs_enable_channel(kcs_bmc, true);
- rc = aspeed_kcs_config_irq(kcs_bmc, pdev);
- if (rc)
- return rc;
rc = misc_register(&kcs_bmc->miscdev);
if (rc) {
--
git-series 0.9.1
The v2 bindings allow us to extract the resources from the devicetree.
The table in the driver is retained to derive the channel index, which
removes the need for kcs_chan property from the v1 bindings. The v2
bindings allow us to reduce the number of warnings generated by the
existing devicetree nodes.
Signed-off-by: Andrew Jeffery <[email protected]>
Reviewed-by: Joel Stanley <[email protected]>
Reviewed-by: Haiyue Wang <[email protected]>
---
drivers/char/ipmi/kcs_bmc_aspeed.c | 144 +++++++++++++++++++++++++-----
1 file changed, 121 insertions(+), 23 deletions(-)
diff --git a/drivers/char/ipmi/kcs_bmc_aspeed.c b/drivers/char/ipmi/kcs_bmc_aspeed.c
index e3dd09022589..509e0d3c6eb1 100644
--- a/drivers/char/ipmi/kcs_bmc_aspeed.c
+++ b/drivers/char/ipmi/kcs_bmc_aspeed.c
@@ -12,6 +12,7 @@
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/poll.h>
#include <linux/regmap.h>
@@ -233,38 +234,133 @@ static const struct kcs_ioreg ast_kcs_bmc_ioregs[KCS_CHANNEL_MAX] = {
{ .idr = LPC_IDR4, .odr = LPC_ODR4, .str = LPC_STR4 },
};
-static int aspeed_kcs_probe(struct platform_device *pdev)
+static struct kcs_bmc *aspeed_kcs_probe_of_v1(struct platform_device *pdev)
{
- struct device *dev = &pdev->dev;
struct aspeed_kcs_bmc *priv;
- struct kcs_bmc *kcs_bmc;
- u32 chan, addr;
+ struct device_node *np;
+ struct kcs_bmc *kcs;
+ u32 channel;
+ u32 slave;
int rc;
- rc = of_property_read_u32(dev->of_node, "kcs_chan", &chan);
- if ((rc != 0) || (chan == 0 || chan > KCS_CHANNEL_MAX)) {
- dev_err(dev, "no valid 'kcs_chan' configured\n");
- return -ENODEV;
+ np = pdev->dev.of_node;
+
+ rc = of_property_read_u32(np, "kcs_chan", &channel);
+ if ((rc != 0) || (channel == 0 || channel > KCS_CHANNEL_MAX)) {
+ dev_err(&pdev->dev, "no valid 'kcs_chan' configured\n");
+ return ERR_PTR(-EINVAL);
}
- rc = of_property_read_u32(dev->of_node, "kcs_addr", &addr);
+ kcs = kcs_bmc_alloc(&pdev->dev, sizeof(struct aspeed_kcs_bmc), channel);
+ if (!kcs)
+ return ERR_PTR(-ENOMEM);
+
+ priv = kcs_bmc_priv(kcs);
+ priv->map = syscon_node_to_regmap(pdev->dev.parent->of_node);
+ if (IS_ERR(priv->map)) {
+ dev_err(&pdev->dev, "Couldn't get regmap\n");
+ return ERR_PTR(-ENODEV);
+ }
+
+ rc = of_property_read_u32(np, "kcs_addr", &slave);
if (rc) {
- dev_err(dev, "no valid 'kcs_addr' configured\n");
- return -ENODEV;
+ dev_err(&pdev->dev, "no valid 'kcs_addr' configured\n");
+ return ERR_PTR(-EINVAL);
}
- kcs_bmc = kcs_bmc_alloc(dev, sizeof(*priv), chan);
- if (!kcs_bmc)
- return -ENOMEM;
+ kcs->ioreg = ast_kcs_bmc_ioregs[channel - 1];
+ aspeed_kcs_set_address(kcs, slave);
+
+ return 0;
+}
+
+static int aspeed_kcs_calculate_channel(const struct kcs_ioreg *regs)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ast_kcs_bmc_ioregs); i++) {
+ if (!memcmp(&ast_kcs_bmc_ioregs[i], regs, sizeof(*regs)))
+ return i + 1;
+ }
+
+ return -EINVAL;
+}
+
+static struct kcs_bmc *aspeed_kcs_probe_of_v2(struct platform_device *pdev)
+{
+ struct aspeed_kcs_bmc *priv;
+ struct device_node *np;
+ struct kcs_ioreg ioreg;
+ struct kcs_bmc *kcs;
+ const __be32 *reg;
+ int channel;
+ u32 slave;
+ int rc;
- priv = kcs_bmc_priv(kcs_bmc);
- priv->map = syscon_node_to_regmap(dev->parent->of_node);
+ np = pdev->dev.of_node;
+
+ /* Don't translate addresses, we want offsets for the regmaps */
+ reg = of_get_address(np, 0, NULL, NULL);
+ if (!reg)
+ return ERR_PTR(-EINVAL);
+ ioreg.idr = be32_to_cpup(reg);
+
+ reg = of_get_address(np, 1, NULL, NULL);
+ if (!reg)
+ return ERR_PTR(-EINVAL);
+ ioreg.odr = be32_to_cpup(reg);
+
+ reg = of_get_address(np, 2, NULL, NULL);
+ if (!reg)
+ return ERR_PTR(-EINVAL);
+ ioreg.str = be32_to_cpup(reg);
+
+ channel = aspeed_kcs_calculate_channel(&ioreg);
+ if (channel < 0)
+ return ERR_PTR(channel);
+
+ kcs = kcs_bmc_alloc(&pdev->dev, sizeof(struct aspeed_kcs_bmc), channel);
+ if (!kcs)
+ return ERR_PTR(-ENOMEM);
+
+ kcs->ioreg = ioreg;
+
+ priv = kcs_bmc_priv(kcs);
+ priv->map = syscon_node_to_regmap(pdev->dev.parent->of_node);
if (IS_ERR(priv->map)) {
- dev_err(dev, "Couldn't get regmap\n");
- return -ENODEV;
+ dev_err(&pdev->dev, "Couldn't get regmap\n");
+ return ERR_PTR(-ENODEV);
}
- kcs_bmc->ioreg = ast_kcs_bmc_ioregs[chan - 1];
+ rc = of_property_read_u32(np, "slave-reg", &slave);
+ if (rc)
+ return ERR_PTR(rc);
+
+ aspeed_kcs_set_address(kcs, slave);
+
+ return kcs;
+}
+
+static int aspeed_kcs_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct kcs_bmc *kcs_bmc;
+ struct device_node *np;
+ int rc;
+
+ np = pdev->dev.of_node;
+ if (of_device_is_compatible(np, "aspeed,ast2400-kcs-bmc") ||
+ of_device_is_compatible(np, "aspeed,ast2500-kcs-bmc"))
+ kcs_bmc = aspeed_kcs_probe_of_v1(pdev);
+ else if (of_device_is_compatible(np, "aspeed,ast2400-kcs-bmc-v2") ||
+ of_device_is_compatible(np, "aspeed,ast2500-kcs-bmc-v2"))
+ kcs_bmc = aspeed_kcs_probe_of_v2(pdev);
+ else
+ return -EINVAL;
+
+ if (IS_ERR(kcs_bmc))
+ return PTR_ERR(kcs_bmc);
+
kcs_bmc->io_inputb = aspeed_kcs_inb;
kcs_bmc->io_outputb = aspeed_kcs_outb;
@@ -274,7 +370,6 @@ static int aspeed_kcs_probe(struct platform_device *pdev)
dev_set_drvdata(dev, kcs_bmc);
- aspeed_kcs_set_address(kcs_bmc, addr);
aspeed_kcs_enable_channel(kcs_bmc, true);
rc = misc_register(&kcs_bmc->miscdev);
@@ -283,9 +378,10 @@ static int aspeed_kcs_probe(struct platform_device *pdev)
return rc;
}
- pr_info("channel=%u addr=0x%x idr=0x%x odr=0x%x str=0x%x\n",
- chan, addr,
- kcs_bmc->ioreg.idr, kcs_bmc->ioreg.odr, kcs_bmc->ioreg.str);
+ dev_dbg(&pdev->dev,
+ "Probed KCS device %d (IDR=0x%x, ODR=0x%x, STR=0x%x)\n",
+ kcs_bmc->channel, kcs_bmc->ioreg.idr, kcs_bmc->ioreg.odr,
+ kcs_bmc->ioreg.str);
return 0;
}
@@ -302,6 +398,8 @@ static int aspeed_kcs_remove(struct platform_device *pdev)
static const struct of_device_id ast_kcs_bmc_match[] = {
{ .compatible = "aspeed,ast2400-kcs-bmc" },
{ .compatible = "aspeed,ast2500-kcs-bmc" },
+ { .compatible = "aspeed,ast2400-kcs-bmc-v2" },
+ { .compatible = "aspeed,ast2500-kcs-bmc-v2" },
{ }
};
MODULE_DEVICE_TABLE(of, ast_kcs_bmc_match);
--
git-series 0.9.1
On Tue, Dec 03, 2019 at 11:08:24PM +1030, Andrew Jeffery wrote:
> The currently interrupts are configured after the channel was enabled.
How about:
The interrupts were configured after the channel was enabled, configure
them before so they will work.
-corey
>
> Signed-off-by: Andrew Jeffery <[email protected]>
> Reviewed-by: Joel Stanley <[email protected]>
> Reviewed-by: Haiyue Wang <[email protected]>
> ---
> drivers/char/ipmi/kcs_bmc_aspeed.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/char/ipmi/kcs_bmc_aspeed.c b/drivers/char/ipmi/kcs_bmc_aspeed.c
> index 3c955946e647..e3dd09022589 100644
> --- a/drivers/char/ipmi/kcs_bmc_aspeed.c
> +++ b/drivers/char/ipmi/kcs_bmc_aspeed.c
> @@ -268,13 +268,14 @@ static int aspeed_kcs_probe(struct platform_device *pdev)
> kcs_bmc->io_inputb = aspeed_kcs_inb;
> kcs_bmc->io_outputb = aspeed_kcs_outb;
>
> + rc = aspeed_kcs_config_irq(kcs_bmc, pdev);
> + if (rc)
> + return rc;
> +
> dev_set_drvdata(dev, kcs_bmc);
>
> aspeed_kcs_set_address(kcs_bmc, addr);
> aspeed_kcs_enable_channel(kcs_bmc, true);
> - rc = aspeed_kcs_config_irq(kcs_bmc, pdev);
> - if (rc)
> - return rc;
>
> rc = misc_register(&kcs_bmc->miscdev);
> if (rc) {
> --
> git-series 0.9.1
On Wed, 4 Dec 2019, at 00:10, Corey Minyard wrote:
> On Tue, Dec 03, 2019 at 11:08:24PM +1030, Andrew Jeffery wrote:
> > The currently interrupts are configured after the channel was enabled.
>
> How about:
>
> The interrupts were configured after the channel was enabled, configure
> them before so they will work.
Hah, yes, that commit message did get a bit mangled. I'll update it.
Thanks,
Andrew