summaryrefslogtreecommitdiffstats
path: root/drivers/reset
diff options
context:
space:
mode:
authorAndrey Smirnov <andrew.smirnov@gmail.com>2019-02-05 13:54:05 -0800
committerSascha Hauer <s.hauer@pengutronix.de>2019-02-11 10:37:50 +0100
commit8ec2c5afff50110970aba7a730a1c1f47af64d46 (patch)
treef0e9abed17a8fef56ec3e043373fbb56f23847d4 /drivers/reset
parentc4448d0d3429a53e08e375323988699f6315a789 (diff)
downloadbarebox-8ec2c5afff50110970aba7a730a1c1f47af64d46.tar.gz
reset: imx7: Add plubming to support multiple IP variants
Port of a Linux commit cffaab878178c7842ab38690070d665adb3f41fd In order to enable supporting i.MX8MQ with this driver, convert it to expect variant specific bits to be passed via driver data. Cc: p.zabel@pengutronix.de Cc: Fabio Estevam <fabio.estevam@nxp.com> Cc: cphealy@gmail.com Cc: l.stach@pengutronix.de Cc: Leonard Crestez <leonard.crestez@nxp.com> Cc: "A.s. Dong" <aisheng.dong@nxp.com> Cc: Richard Zhu <hongxing.zhu@nxp.com> Cc: Rob Herring <robh@kernel.org> Cc: devicetree@vger.kernel.org Cc: linux-imx@nxp.com Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/reset')
-rw-r--r--drivers/reset/reset-imx7.c50
1 files changed, 36 insertions, 14 deletions
diff --git a/drivers/reset/reset-imx7.c b/drivers/reset/reset-imx7.c
index 6dc5de1..f723dc2 100644
--- a/drivers/reset/reset-imx7.c
+++ b/drivers/reset/reset-imx7.c
@@ -22,10 +22,22 @@
#include <linux/reset-controller.h>
#include <mfd/syscon.h>
#include <regmap.h>
+#include <of_device.h>
+
+struct imx7_src_signal {
+ unsigned int offset, bit;
+};
+
+struct imx7_src_variant {
+ const struct imx7_src_signal *signals;
+ unsigned int signals_num;
+ struct reset_control_ops ops;
+};
struct imx7_src {
struct reset_controller_dev rcdev;
struct regmap *regmap;
+ const struct imx7_src_signal *signals;
};
enum imx7_src_registers {
@@ -40,9 +52,14 @@ enum imx7_src_registers {
SRC_DDRC_RCR = 0x1000,
};
-struct imx7_src_signal {
- unsigned int offset, bit;
-};
+static int imx7_reset_update(struct imx7_src *imx7src,
+ unsigned long id, unsigned int value)
+{
+ const struct imx7_src_signal *signal = &imx7src->signals[id];
+
+ return regmap_update_bits(imx7src->regmap,
+ signal->offset, signal->bit, value);
+}
static const struct imx7_src_signal imx7_src_signals[IMX7_RESET_NUM] = {
[IMX7_RESET_A7_CORE_POR_RESET0] = { SRC_A7RCR0, BIT(0) },
@@ -81,8 +98,8 @@ static int imx7_reset_set(struct reset_controller_dev *rcdev,
unsigned long id, bool assert)
{
struct imx7_src *imx7src = to_imx7_src(rcdev);
- const struct imx7_src_signal *signal = &imx7_src_signals[id];
- unsigned int value = assert ? signal->bit : 0;;
+ const unsigned int bit = imx7src->signals[id].bit;
+ unsigned int value = assert ? bit : 0;
switch (id) {
case IMX7_RESET_PCIEPHY:
@@ -95,12 +112,11 @@ static int imx7_reset_set(struct reset_controller_dev *rcdev,
break;
case IMX7_RESET_PCIE_CTRL_APPS_EN:
- value = (assert) ? 0 : signal->bit;
+ value = assert ? 0 : bit;
break;
}
- return regmap_update_bits(imx7src->regmap,
- signal->offset, signal->bit, value);
+ return imx7_reset_update(imx7src, id, value);
}
static int imx7_reset_assert(struct reset_controller_dev *rcdev,
@@ -115,31 +131,37 @@ static int imx7_reset_deassert(struct reset_controller_dev *rcdev,
return imx7_reset_set(rcdev, id, false);
}
-static struct reset_control_ops imx7_reset_ops = {
- .assert = imx7_reset_assert,
- .deassert = imx7_reset_deassert,
+static const struct imx7_src_variant variant_imx7 = {
+ .signals = imx7_src_signals,
+ .signals_num = ARRAY_SIZE(imx7_src_signals),
+ .ops = {
+ .assert = imx7_reset_assert,
+ .deassert = imx7_reset_deassert,
+ },
};
static int imx7_reset_probe(struct device_d *dev)
{
struct imx7_src *imx7src;
+ const struct imx7_src_variant *variant = of_device_get_match_data(dev);
imx7src = xzalloc(sizeof(*imx7src));
+ imx7src->signals = variant->signals;
imx7src->regmap = syscon_node_to_regmap(dev->device_node);
if (IS_ERR(imx7src->regmap)) {
dev_err(dev, "Unable to get imx7-src regmap");
return PTR_ERR(imx7src->regmap);
}
- imx7src->rcdev.nr_resets = IMX7_RESET_NUM;
- imx7src->rcdev.ops = &imx7_reset_ops;
+ imx7src->rcdev.nr_resets = variant->signals_num;
+ imx7src->rcdev.ops = &variant->ops;
imx7src->rcdev.of_node = dev->device_node;
return reset_controller_register(&imx7src->rcdev);
}
static const struct of_device_id imx7_reset_dt_ids[] = {
- { .compatible = "fsl,imx7d-src", },
+ { .compatible = "fsl,imx7d-src", .data = &variant_imx7 },
{ /* sentinel */ },
};