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authorHeikki Krogerus <heikki.krogerus@linux.intel.com>2014-05-09 11:35:21 +0300
committerThierry Reding <thierry.reding@gmail.com>2014-08-07 13:18:03 +0200
commit65accd87381ed96bf8893124b149bae08edd2740 (patch)
treeeede25d9b3766884e78fd130ee0a9a393aafdba5 /drivers/pwm/pwm-lpss.c
parented1a819a3fdbde279f3ca18e2268cc12666e9bf1 (diff)
downloadlinux-stericsson-65accd87381ed96bf8893124b149bae08edd2740.tar.gz
pwm: lpss: remove dependency on clk framework
Unlike other Intel LPSS devices, the PWM does not have the clock dividers or the gate. All we get from the clock is the rate. Since PCI case uses the driver data to get the rate, we can drop the clk and use the same data also in case of ACPI. The frequency is the same. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Chew, Chiau Ee <chiau.ee.chew@intel.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm/pwm-lpss.c')
-rw-r--r--drivers/pwm/pwm-lpss.c32
1 files changed, 10 insertions, 22 deletions
diff --git a/drivers/pwm/pwm-lpss.c b/drivers/pwm/pwm-lpss.c
index 44ce6c6103ae..4df994f72d96 100644
--- a/drivers/pwm/pwm-lpss.c
+++ b/drivers/pwm/pwm-lpss.c
@@ -14,7 +14,6 @@
*/
#include <linux/acpi.h>
-#include <linux/clk.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/module.h>
@@ -37,7 +36,6 @@ static int pci_drv, plat_drv; /* So we know which drivers registered */
struct pwm_lpss_chip {
struct pwm_chip chip;
void __iomem *regs;
- struct clk *clk;
unsigned long clk_rate;
};
@@ -97,11 +95,6 @@ static int pwm_lpss_enable(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct pwm_lpss_chip *lpwm = to_lpwm(chip);
u32 ctrl;
- int ret;
-
- ret = clk_prepare_enable(lpwm->clk);
- if (ret)
- return ret;
ctrl = readl(lpwm->regs + PWM);
writel(ctrl | PWM_ENABLE, lpwm->regs + PWM);
@@ -116,8 +109,6 @@ static void pwm_lpss_disable(struct pwm_chip *chip, struct pwm_device *pwm)
ctrl = readl(lpwm->regs + PWM);
writel(ctrl & ~PWM_ENABLE, lpwm->regs + PWM);
-
- clk_disable_unprepare(lpwm->clk);
}
static const struct pwm_ops pwm_lpss_ops = {
@@ -142,17 +133,7 @@ static struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev,
if (IS_ERR(lpwm->regs))
return ERR_CAST(lpwm->regs);
- if (info) {
- lpwm->clk_rate = info->clk_rate;
- } else {
- lpwm->clk = devm_clk_get(dev, NULL);
- if (IS_ERR(lpwm->clk)) {
- dev_err(dev, "failed to get PWM clock\n");
- return ERR_CAST(lpwm->clk);
- }
- lpwm->clk_rate = clk_get_rate(lpwm->clk);
- }
-
+ lpwm->clk_rate = info->clk_rate;
lpwm->chip.dev = dev;
lpwm->chip.ops = &pwm_lpss_ops;
lpwm->chip.base = -1;
@@ -221,12 +202,19 @@ static struct pci_driver pwm_lpss_driver_pci = {
static int pwm_lpss_probe_platform(struct platform_device *pdev)
{
+ const struct pwm_lpss_boardinfo *info;
+ const struct acpi_device_id *id;
struct pwm_lpss_chip *lpwm;
struct resource *r;
+ id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
+ if (!id)
+ return -ENODEV;
+
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- lpwm = pwm_lpss_probe(&pdev->dev, r, NULL);
+ info = (struct pwm_lpss_boardinfo *)id->driver_data;
+ lpwm = pwm_lpss_probe(&pdev->dev, r, info);
if (IS_ERR(lpwm))
return PTR_ERR(lpwm);
@@ -242,7 +230,7 @@ static int pwm_lpss_remove_platform(struct platform_device *pdev)
}
static const struct acpi_device_id pwm_lpss_acpi_match[] = {
- { "80860F09", 0 },
+ { "80860F09", (unsigned long)&byt_info },
{ },
};
MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match);