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authorJohn Crispin <john@phrozen.org>2018-07-25 09:52:09 (GMT)
committerThierry Reding <thierry.reding@gmail.com>2018-08-20 09:36:07 (GMT)
commit8cdc43afbb2cb58692c49fab0b13e2d9439c0642 (patch)
treeffdf3335ba19d2f12ba5f404d6117f82dd7ce612 /drivers/pwm
parent935be8e08a73e090ee8a9e252242c089f81a4ce4 (diff)
pwm: mediatek: Add MT7628 support
Add support for MT7628. The SoC is legacy MIPS and hence has no complex clock tree. This patch add an extra flag to the SoC specific data indicating, that no clocks are present. Signed-off-by: John Crispin <john@phrozen.org> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm')
-rw-r--r--drivers/pwm/Kconfig2
-rw-r--r--drivers/pwm/pwm-mediatek.c19
2 files changed, 19 insertions, 2 deletions
diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index a4d262d..504d252 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -286,7 +286,7 @@ config PWM_MTK_DISP
config PWM_MEDIATEK
tristate "MediaTek PWM support"
- depends on ARCH_MEDIATEK || COMPILE_TEST
+ depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST
help
Generic PWM framework driver for Mediatek ARM SoC.
diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-mediatek.c
index 328c1247..eb6674c 100644
--- a/drivers/pwm/pwm-mediatek.c
+++ b/drivers/pwm/pwm-mediatek.c
@@ -57,6 +57,7 @@ static const char * const mtk_pwm_clk_name[MTK_CLK_MAX] = {
struct mtk_pwm_platform_data {
unsigned int num_pwms;
bool pwm45_fixup;
+ bool has_clks;
};
/**
@@ -86,6 +87,9 @@ static int mtk_pwm_clk_enable(struct pwm_chip *chip, struct pwm_device *pwm)
struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip);
int ret;
+ if (!pc->soc->has_clks)
+ return 0;
+
ret = clk_prepare_enable(pc->clks[MTK_CLK_TOP]);
if (ret < 0)
return ret;
@@ -112,6 +116,9 @@ static void mtk_pwm_clk_disable(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip);
+ if (!pc->soc->has_clks)
+ return;
+
clk_disable_unprepare(pc->clks[MTK_CLK_PWM1 + pwm->hwpwm]);
clk_disable_unprepare(pc->clks[MTK_CLK_MAIN]);
clk_disable_unprepare(pc->clks[MTK_CLK_TOP]);
@@ -239,7 +246,7 @@ static int mtk_pwm_probe(struct platform_device *pdev)
if (IS_ERR(pc->regs))
return PTR_ERR(pc->regs);
- for (i = 0; i < data->num_pwms + 2; i++) {
+ for (i = 0; i < data->num_pwms + 2 && pc->soc->has_clks; i++) {
pc->clks[i] = devm_clk_get(&pdev->dev, mtk_pwm_clk_name[i]);
if (IS_ERR(pc->clks[i])) {
dev_err(&pdev->dev, "clock: %s fail: %ld\n",
@@ -274,22 +281,32 @@ static int mtk_pwm_remove(struct platform_device *pdev)
static const struct mtk_pwm_platform_data mt2712_pwm_data = {
.num_pwms = 8,
.pwm45_fixup = false,
+ .has_clks = true,
};
static const struct mtk_pwm_platform_data mt7622_pwm_data = {
.num_pwms = 6,
.pwm45_fixup = false,
+ .has_clks = true,
};
static const struct mtk_pwm_platform_data mt7623_pwm_data = {
.num_pwms = 5,
.pwm45_fixup = true,
+ .has_clks = true,
+};
+
+static const struct mtk_pwm_platform_data mt7628_pwm_data = {
+ .num_pwms = 4,
+ .pwm45_fixup = true,
+ .has_clks = false,
};
static const struct of_device_id mtk_pwm_of_match[] = {
{ .compatible = "mediatek,mt2712-pwm", .data = &mt2712_pwm_data },
{ .compatible = "mediatek,mt7622-pwm", .data = &mt7622_pwm_data },
{ .compatible = "mediatek,mt7623-pwm", .data = &mt7623_pwm_data },
+ { .compatible = "mediatek,mt7628-pwm", .data = &mt7628_pwm_data },
{ },
};
MODULE_DEVICE_TABLE(of, mtk_pwm_of_match);

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