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Message-Id: <1408517756-9412-3-git-send-email-LW@KARO-electronics.de>
Date: Wed, 20 Aug 2014 08:55:54 +0200
From: Lothar Waßmann <LW@...O-electronics.de>
To: Thierry Reding <thierry.reding@...il.com>,
linux-kernel@...r.kernel.org, linux-pwm@...r.kernel.org,
Lothar Waßmann <LW@...O-electronics.de>,
Shawn Guo <shawn.guo@...aro.org>,
Sascha Hauer <kernel@...gutronix.de>,
Arnd Bergmann <arnd@...db.de>,
Tony Prisk <linux@...sktech.co.nz>,
linux-arm-kernel@...ts.infradead.org
Subject: [PATCHv4 2/4] pwm: make the PWM_POLARITY flag in DTB optional
Change the pwm chip driver registration, so that a chip driver that
supports polarity inversion can still be used with DTBs that don't
provide the 'PWM_POLARITY' flag.
This is done to provide polarity inversion support for the pwm-imx
driver without having to modify all existing DTS files.
Signed-off-by: Lothar Waßmann <LW@...O-electronics.de>
---
drivers/pwm/core.c | 18 ++++++------------
drivers/pwm/pwm-atmel-tcb.c | 1 -
drivers/pwm/pwm-atmel.c | 4 +---
drivers/pwm/pwm-pxa.c | 5 ++---
drivers/pwm/pwm-renesas-tpu.c | 1 -
drivers/pwm/pwm-samsung.c | 1 -
drivers/pwm/pwm-tiecap.c | 1 -
drivers/pwm/pwm-tiehrpwm.c | 1 -
drivers/pwm/pwm-vt8500.c | 1 -
include/linux/pwm.h | 1 -
10 files changed, 9 insertions(+), 25 deletions(-)
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 7af0043..ab0fc5a 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -136,7 +136,7 @@ of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args)
{
struct pwm_device *pwm;
- if (pc->of_pwm_n_cells < 3)
+ if (args->args_count != 3)
return ERR_PTR(-EINVAL);
if (args->args[0] >= pc->npwm)
@@ -162,12 +162,15 @@ of_pwm_simple_xlate(struct pwm_chip *pc, const struct of_phandle_args *args)
{
struct pwm_device *pwm;
- if (pc->of_pwm_n_cells < 2)
+ if (args->args_count < 2)
return ERR_PTR(-EINVAL);
if (args->args[0] >= pc->npwm)
return ERR_PTR(-EINVAL);
+ if (args->args_count > 2)
+ return of_pwm_xlate_with_flags(pc, args);
+
pwm = pwm_request_from_chip(pc, args->args[0], NULL);
if (IS_ERR(pwm))
return pwm;
@@ -182,10 +185,8 @@ static void of_pwmchip_add(struct pwm_chip *chip)
if (!chip->dev || !chip->dev->of_node)
return;
- if (!chip->of_xlate) {
+ if (!chip->of_xlate)
chip->of_xlate = of_pwm_simple_xlate;
- chip->of_pwm_n_cells = 2;
- }
of_node_get(chip->dev->of_node);
}
@@ -536,13 +537,6 @@ struct pwm_device *of_pwm_get(struct device_node *np, const char *con_id)
goto put;
}
- if (args.args_count != pc->of_pwm_n_cells) {
- pr_debug("%s: wrong #pwm-cells for %s\n", np->full_name,
- args.np->full_name);
- pwm = ERR_PTR(-EINVAL);
- goto put;
- }
-
pwm = pc->of_xlate(pc, &args);
if (IS_ERR(pwm))
goto put;
diff --git a/drivers/pwm/pwm-atmel-tcb.c b/drivers/pwm/pwm-atmel-tcb.c
index f3dcd02..55fabf8 100644
--- a/drivers/pwm/pwm-atmel-tcb.c
+++ b/drivers/pwm/pwm-atmel-tcb.c
@@ -395,7 +395,6 @@ static int atmel_tcb_pwm_probe(struct platform_device *pdev)
tcbpwm->chip.dev = &pdev->dev;
tcbpwm->chip.ops = &atmel_tcb_pwm_ops;
tcbpwm->chip.of_xlate = of_pwm_xlate_with_flags;
- tcbpwm->chip.of_pwm_n_cells = 3;
tcbpwm->chip.base = -1;
tcbpwm->chip.npwm = NPWM;
tcbpwm->tc = tc;
diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c
index 6e700a5..ae7c946 100644
--- a/drivers/pwm/pwm-atmel.c
+++ b/drivers/pwm/pwm-atmel.c
@@ -350,10 +350,8 @@ static int atmel_pwm_probe(struct platform_device *pdev)
atmel_pwm->chip.dev = &pdev->dev;
atmel_pwm->chip.ops = &atmel_pwm_ops;
- if (pdev->dev.of_node) {
+ if (pdev->dev.of_node)
atmel_pwm->chip.of_xlate = of_pwm_xlate_with_flags;
- atmel_pwm->chip.of_pwm_n_cells = 3;
- }
atmel_pwm->chip.base = -1;
atmel_pwm->chip.npwm = 4;
diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c
index 0b312ec..5656052 100644
--- a/drivers/pwm/pwm-pxa.c
+++ b/drivers/pwm/pwm-pxa.c
@@ -191,10 +191,9 @@ static int pwm_probe(struct platform_device *pdev)
pwm->chip.base = -1;
pwm->chip.npwm = (id->driver_data & HAS_SECONDARY_PWM) ? 2 : 1;
- if (IS_ENABLED(CONFIG_OF)) {
+ if (IS_ENABLED(CONFIG_OF))
pwm->chip.of_xlate = pxa_pwm_of_xlate;
- pwm->chip.of_pwm_n_cells = 1;
- }
+
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pwm->mmio_base = devm_ioremap_resource(&pdev->dev, r);
diff --git a/drivers/pwm/pwm-renesas-tpu.c b/drivers/pwm/pwm-renesas-tpu.c
index 3b71b42..5271da3 100644
--- a/drivers/pwm/pwm-renesas-tpu.c
+++ b/drivers/pwm/pwm-renesas-tpu.c
@@ -419,7 +419,6 @@ static int tpu_probe(struct platform_device *pdev)
tpu->chip.dev = &pdev->dev;
tpu->chip.ops = &tpu_pwm_ops;
tpu->chip.of_xlate = of_pwm_xlate_with_flags;
- tpu->chip.of_pwm_n_cells = 3;
tpu->chip.base = -1;
tpu->chip.npwm = TPU_CHANNEL_MAX;
diff --git a/drivers/pwm/pwm-samsung.c b/drivers/pwm/pwm-samsung.c
index ba6b650..317d7d1 100644
--- a/drivers/pwm/pwm-samsung.c
+++ b/drivers/pwm/pwm-samsung.c
@@ -484,7 +484,6 @@ static int pwm_samsung_probe(struct platform_device *pdev)
return ret;
chip->chip.of_xlate = of_pwm_xlate_with_flags;
- chip->chip.of_pwm_n_cells = 3;
} else {
if (!pdev->dev.platform_data) {
dev_err(&pdev->dev, "no platform data specified\n");
diff --git a/drivers/pwm/pwm-tiecap.c b/drivers/pwm/pwm-tiecap.c
index 74efbe7..a8e8282 100644
--- a/drivers/pwm/pwm-tiecap.c
+++ b/drivers/pwm/pwm-tiecap.c
@@ -227,7 +227,6 @@ static int ecap_pwm_probe(struct platform_device *pdev)
pc->chip.dev = &pdev->dev;
pc->chip.ops = &ecap_pwm_ops;
pc->chip.of_xlate = of_pwm_xlate_with_flags;
- pc->chip.of_pwm_n_cells = 3;
pc->chip.base = -1;
pc->chip.npwm = 1;
diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c
index cb75133..12a8ae4 100644
--- a/drivers/pwm/pwm-tiehrpwm.c
+++ b/drivers/pwm/pwm-tiehrpwm.c
@@ -458,7 +458,6 @@ static int ehrpwm_pwm_probe(struct platform_device *pdev)
pc->chip.dev = &pdev->dev;
pc->chip.ops = &ehrpwm_pwm_ops;
pc->chip.of_xlate = of_pwm_xlate_with_flags;
- pc->chip.of_pwm_n_cells = 3;
pc->chip.base = -1;
pc->chip.npwm = NUM_PWM_CHANNEL;
diff --git a/drivers/pwm/pwm-vt8500.c b/drivers/pwm/pwm-vt8500.c
index 652e6b5..e04a3c0 100644
--- a/drivers/pwm/pwm-vt8500.c
+++ b/drivers/pwm/pwm-vt8500.c
@@ -217,7 +217,6 @@ static int vt8500_pwm_probe(struct platform_device *pdev)
chip->chip.dev = &pdev->dev;
chip->chip.ops = &vt8500_pwm_ops;
chip->chip.of_xlate = of_pwm_xlate_with_flags;
- chip->chip.of_pwm_n_cells = 3;
chip->chip.base = -1;
chip->chip.npwm = VT8500_NR_PWMS;
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index e90628c..4cf1569 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -174,7 +174,6 @@ struct pwm_chip {
struct pwm_device * (*of_xlate)(struct pwm_chip *pc,
const struct of_phandle_args *args);
- unsigned int of_pwm_n_cells;
bool can_sleep;
};
--
1.7.10.4
--
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