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Date: Sat, 18 Jul 2020 07:05:56 +0200
From: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To: unlisted-recipients:; (no To-header on input)
Cc: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-media@...r.kernel.org, devel@...verdev.osuosl.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] media: atomisp: reorganize the code under gmin_subdev_add()
The gmin_subdev_add() currently doesn't use ACPI device
power management. In order to prepare for adding support
for it, let's shift some things, placing the PM-related
stuff at the end of the probing logic.
Let's also store the current gs on a temporary var, in
order to simplify the source code.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
.../media/atomisp/pci/atomisp_gmin_platform.c | 119 +++++++++---------
1 file changed, 60 insertions(+), 59 deletions(-)
diff --git a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
index cb360b8399e5..81d89d8c549a 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
@@ -447,6 +447,7 @@ static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
{
struct i2c_client *power = NULL, *client = v4l2_get_subdevdata(subdev);
struct acpi_device *adev;
+ struct gmin_subdev *gs;
acpi_handle handle;
struct device *dev;
int i, ret, clock_num;
@@ -457,16 +458,39 @@ static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
dev = &client->dev;
handle = ACPI_HANDLE(dev);
-
- // FIXME: may need to release resources allocated by acpi_bus_get_device()
- if (!handle || acpi_bus_get_device(handle, &adev)) {
- dev_err(dev, "Error could not get ACPI device\n");
- return NULL;
- }
+ adev = ACPI_COMPANION(&client->dev);
dev_info(&client->dev, "%s: ACPI detected it on bus ID=%s, HID=%s\n",
__func__, acpi_device_bid(adev), acpi_device_hid(adev));
+ for (i = 0; i < MAX_SUBDEVS && gmin_subdevs[i].subdev; i++)
+ ;
+ if (i >= MAX_SUBDEVS)
+ return NULL;
+
+ gs = &gmin_subdevs[i];
+ gs->subdev = subdev;
+
+ /*WA:CHT requires XTAL clock as PLL is not stable.*/
+ gmin_subdevs[i].clock_src = gmin_get_var_int(dev, false, "ClkSrc",
+ VLV2_CLK_PLL_19P2MHZ);
+
+ gs->csi_port = gmin_get_var_int(dev, false, "CsiPort", 0);
+ gs->csi_lanes = gmin_get_var_int(dev, false, "CsiLanes", 1);
+
+ gs->gpio0 = gpiod_get_index(dev, NULL, 0, GPIOD_OUT_LOW);
+ if (IS_ERR(gs->gpio0))
+ gs->gpio0 = NULL;
+
+ gs->gpio1 = gpiod_get_index(dev, NULL, 1, GPIOD_OUT_LOW);
+ if (IS_ERR(gs->gpio1))
+ gs->gpio1 = NULL;
+
+ /*
+ * FIXME: the code below doesn't rely on ACPI device_pm.c code to
+ * set clocks and do power management.
+ */
+
if (!pmic_id) {
if (gmin_i2c_dev_exists(dev, PMIC_ACPI_TI, &power))
pmic_id = PMIC_TI;
@@ -478,13 +502,8 @@ static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
pmic_id = PMIC_REGULATOR;
}
- for (i = 0; i < MAX_SUBDEVS && gmin_subdevs[i].subdev; i++)
- ;
- if (i >= MAX_SUBDEVS)
- return NULL;
-
if (power) {
- gmin_subdevs[i].pwm_i2c_addr = power->addr;
+ gs->pwm_i2c_addr = power->addr;
dev_info(dev,
"gmin: power management provided via %s (i2c addr 0x%02x)\n",
pmic_name[pmic_id], power->addr);
@@ -493,17 +512,7 @@ static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
pmic_name[pmic_id]);
}
- gmin_subdevs[i].subdev = subdev;
-
- /*WA:CHT requires XTAL clock as PLL is not stable.*/
- gmin_subdevs[i].clock_src = gmin_get_var_int(dev, false, "ClkSrc",
- VLV2_CLK_PLL_19P2MHZ);
- gmin_subdevs[i].csi_port = gmin_get_var_int(dev, false, "CsiPort", 0);
- gmin_subdevs[i].csi_lanes = gmin_get_var_int(dev, false, "CsiLanes", 1);
-
/*
- * FIXME:
- *
* According with :
* https://github.com/projectceladon/hardware-intel-kernelflinger/blob/master/doc/fastboot.md
*
@@ -526,9 +535,9 @@ static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
snprintf(gmin_pmc_clk_name, sizeof(gmin_pmc_clk_name),
"%s_%d", "pmc_plt_clk", clock_num);
- gmin_subdevs[i].pmc_clk = devm_clk_get(dev, gmin_pmc_clk_name);
- if (IS_ERR(gmin_subdevs[i].pmc_clk)) {
- ret = PTR_ERR(gmin_subdevs[i].pmc_clk);
+ gs->pmc_clk = devm_clk_get(dev, gmin_pmc_clk_name);
+ if (IS_ERR(gs->pmc_clk)) {
+ ret = PTR_ERR(gs->pmc_clk);
dev_err(dev,
"Failed to get clk from %s : %d\n",
@@ -549,25 +558,17 @@ static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
* to disable a clock that has not been enabled,
* we need to enable the clock first.
*/
- ret = clk_prepare_enable(gmin_subdevs[i].pmc_clk);
+ ret = clk_prepare_enable(gs->pmc_clk);
if (!ret)
- clk_disable_unprepare(gmin_subdevs[i].pmc_clk);
-
- gmin_subdevs[i].gpio0 = gpiod_get_index(dev, NULL, 0, GPIOD_OUT_LOW);
- if (IS_ERR(gmin_subdevs[i].gpio0))
- gmin_subdevs[i].gpio0 = NULL;
-
- gmin_subdevs[i].gpio1 = gpiod_get_index(dev, NULL, 1, GPIOD_OUT_LOW);
- if (IS_ERR(gmin_subdevs[i].gpio1))
- gmin_subdevs[i].gpio1 = NULL;
+ clk_disable_unprepare(gs->pmc_clk);
switch (pmic_id) {
case PMIC_REGULATOR:
- gmin_subdevs[i].v1p8_reg = regulator_get(dev, "V1P8SX");
- gmin_subdevs[i].v2p8_reg = regulator_get(dev, "V2P8SX");
+ gs->v1p8_reg = regulator_get(dev, "V1P8SX");
+ gs->v2p8_reg = regulator_get(dev, "V2P8SX");
- gmin_subdevs[i].v1p2_reg = regulator_get(dev, "V1P2A");
- gmin_subdevs[i].v2p8_vcm_reg = regulator_get(dev, "VPROG4B");
+ gs->v1p2_reg = regulator_get(dev, "V1P2A");
+ gs->v2p8_vcm_reg = regulator_get(dev, "VPROG4B");
/* Note: ideally we would initialize v[12]p8_on to the
* output of regulator_is_enabled(), but sadly that
@@ -579,32 +580,32 @@ static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
break;
case PMIC_AXP:
- gmin_subdevs[i].eldo1_1p8v = gmin_get_var_int(dev, false,
- "eldo1_1p8v",
- ELDO1_1P8V);
- gmin_subdevs[i].eldo1_sel_reg = gmin_get_var_int(dev, false,
- "eldo1_sel_reg",
- ELDO1_SEL_REG);
- gmin_subdevs[i].eldo1_ctrl_shift = gmin_get_var_int(dev, false,
- "eldo1_ctrl_shift",
- ELDO1_CTRL_SHIFT);
- gmin_subdevs[i].eldo2_1p8v = gmin_get_var_int(dev, false,
- "eldo2_1p8v",
- ELDO2_1P8V);
- gmin_subdevs[i].eldo2_sel_reg = gmin_get_var_int(dev, false,
- "eldo2_sel_reg",
- ELDO2_SEL_REG);
- gmin_subdevs[i].eldo2_ctrl_shift = gmin_get_var_int(dev, false,
- "eldo2_ctrl_shift",
- ELDO2_CTRL_SHIFT);
- gmin_subdevs[i].pwm_i2c_addr = power->addr;
+ gs->eldo1_1p8v = gmin_get_var_int(dev, false,
+ "eldo1_1p8v",
+ ELDO1_1P8V);
+ gs->eldo1_sel_reg = gmin_get_var_int(dev, false,
+ "eldo1_sel_reg",
+ ELDO1_SEL_REG);
+ gs->eldo1_ctrl_shift = gmin_get_var_int(dev, false,
+ "eldo1_ctrl_shift",
+ ELDO1_CTRL_SHIFT);
+ gs->eldo2_1p8v = gmin_get_var_int(dev, false,
+ "eldo2_1p8v",
+ ELDO2_1P8V);
+ gs->eldo2_sel_reg = gmin_get_var_int(dev, false,
+ "eldo2_sel_reg",
+ ELDO2_SEL_REG);
+ gs->eldo2_ctrl_shift = gmin_get_var_int(dev, false,
+ "eldo2_ctrl_shift",
+ ELDO2_CTRL_SHIFT);
+ gs->pwm_i2c_addr = power->addr;
break;
default:
break;
}
- return &gmin_subdevs[i];
+ return gs;
}
static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev)
--
2.26.2
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