Rather than hard-coding the quirk topology, which stopped scaling,
parse the information from DT. The code looks for all compatible
PMICs -- da9036 and da9210 -- and checks if their IRQ line is tied
to the same pin. If so, the code sends a matching sequence to the
PMIC to deassert the IRQ.
Signed-off-by: Marek Vasut <marek.vasut+renesas@xxxxxxxxx>
Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
Cc: Simon Horman <horms+renesas@xxxxxxxxxxxx>
Cc: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
Cc: linux-renesas-soc@xxxxxxxxxxxxxxx
---
V2: - Replace the DT shared IRQ check loop with memcmp()
- Send the I2C message to deassert the IRQ line to all PMICs
in the list with shared IRQ line instead of just one
- Add comment that this works only in case all the PMICs are
on the same I2C bus
V3: - Drop the addr = 0x00 init
- Drop reinit of argsa in rcar_gen2_regulator_quirk
---
arch/arm/mach-shmobile/regulator-quirk-rcar-gen2.c | 114 ++++++++++++++++-----
1 file changed, 90 insertions(+), 24 deletions(-)
diff --git a/arch/arm/mach-shmobile/regulator-quirk-rcar-gen2.c b/arch/arm/mach-shmobile/regulator-quirk-rcar-gen2.c
index 93f628acfd94..b919073aa27e 100644
--- a/arch/arm/mach-shmobile/regulator-quirk-rcar-gen2.c
+++ b/arch/arm/mach-shmobile/regulator-quirk-rcar-gen2.c
@@ -31,8 +31,10 @@
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/io.h>
+#include <linux/list.h>
#include <linux/notifier.h>
#include <linux/of.h>
+#include <linux/of_irq.h>
#include <linux/mfd/da9063/registers.h>
@@ -44,34 +46,45 @@
/* start of DA9210 System Control and Event Registers */
#define DA9210_REG_MASK_A 0x54
+struct regulator_quirk {
+ struct list_head list;
+ const struct of_device_id *id;
+ struct of_phandle_args irq_args;
+ struct i2c_msg i2c_msg;
+ bool shared; /* IRQ line is shared */
+};
+
+static LIST_HEAD(quirk_list);
static void __iomem *irqc;
/* first byte sets the memory pointer, following are consecutive reg values */
static u8 da9063_irq_clr[] = { DA9063_REG_IRQ_MASK_A, 0xff, 0xff, 0xff, 0xff };
static u8 da9210_irq_clr[] = { DA9210_REG_MASK_A, 0xff, 0xff };
-static struct i2c_msg da9xxx_msgs[3] = {
- {
- .addr = 0x58,
- .len = ARRAY_SIZE(da9063_irq_clr),
- .buf = da9063_irq_clr,
- }, {
- .addr = 0x68,
- .len = ARRAY_SIZE(da9210_irq_clr),
- .buf = da9210_irq_clr,
- }, {
- .addr = 0x70,
- .len = ARRAY_SIZE(da9210_irq_clr),
- .buf = da9210_irq_clr,
- },
+static struct i2c_msg da9063_msgs = {
+ .len = ARRAY_SIZE(da9063_irq_clr),
+ .buf = da9063_irq_clr,
+};
+
+static struct i2c_msg da9210_msgs = {
+ .len = ARRAY_SIZE(da9210_irq_clr),
+ .buf = da9210_irq_clr,
+};
+
+static const struct of_device_id rcar_gen2_quirk_match[] = {
+ { .compatible = "dlg,da9063", .data = &da9063_msgs },
+ { .compatible = "dlg,da9210", .data = &da9210_msgs },
+ {},
};
static int regulator_quirk_notify(struct notifier_block *nb,
unsigned long action, void *data)
{
+ struct regulator_quirk *pos, *tmp;
struct device *dev = data;
struct i2c_client *client;
static bool done;
+ int ret;
u32 mon;
if (done)
@@ -88,17 +101,20 @@ static int regulator_quirk_notify(struct notifier_block *nb,
client = to_i2c_client(dev);
dev_dbg(dev, "Detected %s\n", client->name);
- if ((client->addr == 0x58 && !strcmp(client->name, "da9063")) ||
- (client->addr == 0x68 && !strcmp(client->name, "da9210")) ||
- (client->addr == 0x70 && !strcmp(client->name, "da9210"))) {
- int ret, len;
+ /*
+ * Send message to all PMICs that share an IRQ line to deassert it.
+ *
+ * WARNING: This works only if all the PMICs are on the same I2C bus.
+ */
+ list_for_each_entry(pos, &quirk_list, list) {
+ if (!pos->shared)
+ continue;
- /* There are two DA9210 on Stout, one on the other boards. */
- len = of_machine_is_compatible("renesas,stout") ? 3 : 2;
+ dev_info(&client->dev, "clearing %s@0x%02x interrupts\n",
+ pos->id->compatible, pos->i2c_msg.addr);
- dev_info(&client->dev, "clearing da9063/da9210 interrupts\n");
- ret = i2c_transfer(client->adapter, da9xxx_msgs, len);
- if (ret != len)
+ ret = i2c_transfer(client->adapter, &pos->i2c_msg, 1);
+ if (ret != 1)
dev_err(&client->dev, "i2c error %d\n", ret);
}
@@ -111,6 +127,11 @@ static int regulator_quirk_notify(struct notifier_block *nb,
remove:
dev_info(dev, "IRQ2 is not asserted, removing quirk\n");
+ list_for_each_entry_safe(pos, tmp, &quirk_list, list) {
+ list_del(&pos->list);
+ kfree(pos);
+ }
+
done = true;
iounmap(irqc);
return 0;
@@ -122,7 +143,13 @@ static struct notifier_block regulator_quirk_nb = {
static int __init rcar_gen2_regulator_quirk(void)
{
- u32 mon;
+ struct device_node *np;
+ const struct of_device_id *id;
+ struct regulator_quirk *quirk;
+ struct regulator_quirk *pos;
+ struct of_phandle_args *argsa, *argsb;
+ u32 mon, addr;
+ int ret;
if (!of_machine_is_compatible("renesas,koelsch") &&
!of_machine_is_compatible("renesas,lager") &&
@@ -130,6 +157,45 @@ static int __init rcar_gen2_regulator_quirk(void)
!of_machine_is_compatible("renesas,gose"))
return -ENODEV;
+ for_each_matching_node_and_match(np, rcar_gen2_quirk_match, &id) {
+ if (!np || !of_device_is_available(np))
+ break;
+
+ quirk = kzalloc(sizeof(*quirk), GFP_KERNEL);
+
+ argsa = &quirk->irq_args;
+ memcpy(&quirk->i2c_msg, id->data, sizeof(quirk->i2c_msg));
+
+ ret = of_property_read_u32(np, "reg", &addr);
+ if (ret)
+ return ret;
+
+ quirk->id = id;
+ quirk->i2c_msg.addr = addr;
+ quirk->shared = false;
+
+ ret = of_irq_parse_one(np, 0, &quirk->irq_args);
+ if (ret)
+ return ret;
+
+ list_for_each_entry(pos, &quirk_list, list) {
+ argsb = &pos->irq_args;
+
+ if (argsa->args_count != argsb->args_count)
+ continue;
+
+ ret = memcmp(argsa->args, argsb->args,
+ argsa->args_count *
+ sizeof(argsa->args[0]));
+ if (!ret) {
+ pos->shared = true;
+ quirk->shared = true;
+ }
+ }
+
+ list_add_tail(&quirk->list, &quirk_list);
+ }
+
irqc = ioremap(IRQC_BASE, PAGE_SIZE);
if (!irqc)
return -ENOMEM;
--
2.16.2
