This patch adds PWM support for MediaTek MT7981 SoC. MT7981 uses a different register offset so we have to add a version field to indicate the IP core version.
Reviewed-by: Simon Glass sjg@chromium.org Signed-off-by: Weijie Gao weijie.gao@mediatek.com --- v3 changes: none v2 changes: none --- drivers/pwm/pwm-mtk.c | 34 ++++++++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-)
diff --git a/drivers/pwm/pwm-mtk.c b/drivers/pwm/pwm-mtk.c index 3100b5caaf..605142eab0 100644 --- a/drivers/pwm/pwm-mtk.c +++ b/drivers/pwm/pwm-mtk.c @@ -29,13 +29,23 @@
#define NSEC_PER_SEC 1000000000L
-static const unsigned int mtk_pwm_reg_offset[] = { +enum mtk_pwm_reg_ver { + PWM_REG_V1, + PWM_REG_V2, +}; + +static const unsigned int mtk_pwm_reg_offset_v1[] = { 0x0010, 0x0050, 0x0090, 0x00d0, 0x0110, 0x0150, 0x0190, 0x0220 };
+static const unsigned int mtk_pwm_reg_offset_v2[] = { + 0x0080, 0x00c0, 0x0100, 0x0140, 0x0180, 0x01c0, 0x0200, 0x0240 +}; + struct mtk_pwm_soc { unsigned int num_pwms; bool pwm45_fixup; + enum mtk_pwm_reg_ver reg_ver; };
struct mtk_pwm_priv { @@ -49,7 +59,16 @@ struct mtk_pwm_priv { static void mtk_pwm_w32(struct udevice *dev, uint channel, uint reg, uint val) { struct mtk_pwm_priv *priv = dev_get_priv(dev); - u32 offset = mtk_pwm_reg_offset[channel]; + u32 offset; + + switch (priv->soc->reg_ver) { + case PWM_REG_V2: + offset = mtk_pwm_reg_offset_v2[channel]; + break; + + default: + offset = mtk_pwm_reg_offset_v1[channel]; + }
writel(val, priv->base + offset + reg); } @@ -159,27 +178,38 @@ static const struct pwm_ops mtk_pwm_ops = { static const struct mtk_pwm_soc mt7622_data = { .num_pwms = 6, .pwm45_fixup = false, + .reg_ver = PWM_REG_V1, };
static const struct mtk_pwm_soc mt7623_data = { .num_pwms = 5, .pwm45_fixup = true, + .reg_ver = PWM_REG_V1, };
static const struct mtk_pwm_soc mt7629_data = { .num_pwms = 1, .pwm45_fixup = false, + .reg_ver = PWM_REG_V1, +}; + +static const struct mtk_pwm_soc mt7981_data = { + .num_pwms = 2, + .pwm45_fixup = false, + .reg_ver = PWM_REG_V2, };
static const struct mtk_pwm_soc mt7986_data = { .num_pwms = 2, .pwm45_fixup = false, + .reg_ver = PWM_REG_V1, };
static const struct udevice_id mtk_pwm_ids[] = { { .compatible = "mediatek,mt7622-pwm", .data = (ulong)&mt7622_data }, { .compatible = "mediatek,mt7623-pwm", .data = (ulong)&mt7623_data }, { .compatible = "mediatek,mt7629-pwm", .data = (ulong)&mt7629_data }, + { .compatible = "mediatek,mt7981-pwm", .data = (ulong)&mt7981_data }, { .compatible = "mediatek,mt7986-pwm", .data = (ulong)&mt7986_data }, { } };