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Tue, 21 Jul 2020 23:00:20 -0800 Received: from MTKMBS02N2.mediatek.inc (172.21.101.101) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 21 Jul 2020 23:50:11 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs02n2.mediatek.inc (172.21.101.101) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 22 Jul 2020 14:50:02 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 22 Jul 2020 14:50:03 +0800 From: Weiyi Lu To: Matthias Brugger , Rob Herring , Stephen Boyd , Nicolas Boichat Subject: [PATCH 3/4] clk: mediatek: Add configurable enable control to mtk_pll_data Date: Wed, 22 Jul 2020 14:50:00 +0800 Message-ID: <1595400601-26220-4-git-send-email-weiyi.lu@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1595400601-26220-1-git-send-email-weiyi.lu@mediatek.com> References: <1595400601-26220-1-git-send-email-weiyi.lu@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 8AB9C873B56F031AD0C2855AC0E93D53A97E5A87F77F9EDAA49315D4E812308E2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200722_030019_874980_548A942A X-CRM114-Status: GOOD ( 15.39 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: James Liao , Weiyi Lu , srv_heupstream@mediatek.com, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, Wendell Lin , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org In all MediaTek PLL design, bit 0 of CON0 register is always the enable bit. However, there's a special case of usbpll on MT8192. The enable bit of usbpll is moved to bit 2 of other register. Add configurable en_reg and base_en_bit for enable control or using the default if without setting in pll data. Signed-off-by: Weiyi Lu --- drivers/clk/mediatek/clk-mtk.h | 2 ++ drivers/clk/mediatek/clk-pll.c | 26 ++++++++++++++++++++++---- 2 files changed, 24 insertions(+), 4 deletions(-) diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h index c3d6756..8bb0b3d 100644 --- a/drivers/clk/mediatek/clk-mtk.h +++ b/drivers/clk/mediatek/clk-mtk.h @@ -233,6 +233,8 @@ struct mtk_pll_data { uint32_t pcw_chg_reg; const struct mtk_pll_div_table *div_table; const char *parent_name; + uint32_t en_reg; + uint8_t base_en_bit; }; void mtk_clk_register_plls(struct device_node *node, diff --git a/drivers/clk/mediatek/clk-pll.c b/drivers/clk/mediatek/clk-pll.c index f440f2cd..b8ccd42 100644 --- a/drivers/clk/mediatek/clk-pll.c +++ b/drivers/clk/mediatek/clk-pll.c @@ -44,6 +44,7 @@ struct mtk_clk_pll { void __iomem *tuner_en_addr; void __iomem *pcw_addr; void __iomem *pcw_chg_addr; + void __iomem *en_addr; const struct mtk_pll_data *data; }; @@ -56,7 +57,10 @@ static int mtk_pll_is_prepared(struct clk_hw *hw) { struct mtk_clk_pll *pll = to_mtk_clk_pll(hw); - return (readl(pll->base_addr + REG_CON0) & CON0_BASE_EN) != 0; + if (pll->en_addr) + return (readl(pll->en_addr) & BIT(pll->data->base_en_bit)) != 0; + else + return (readl(pll->base_addr + REG_CON0) & CON0_BASE_EN) != 0; } static unsigned long __mtk_pll_recalc_rate(struct mtk_clk_pll *pll, u32 fin, @@ -251,6 +255,12 @@ static int mtk_pll_prepare(struct clk_hw *hw) r |= pll->data->en_mask; writel(r, pll->base_addr + REG_CON0); + if (pll->en_addr) { + r = readl(pll->en_addr); + r |= BIT(pll->data->base_en_bit); + writel(r, pll->en_addr); + } + __mtk_pll_tuner_enable(pll); udelay(20); @@ -277,9 +287,15 @@ static void mtk_pll_unprepare(struct clk_hw *hw) __mtk_pll_tuner_disable(pll); - r = readl(pll->base_addr + REG_CON0); - r &= ~CON0_BASE_EN; - writel(r, pll->base_addr + REG_CON0); + if (pll->en_addr) { + r = readl(pll->en_addr); + r &= ~BIT(pll->data->base_en_bit); + writel(r, pll->en_addr); + } else { + r = readl(pll->base_addr + REG_CON0); + r &= ~CON0_BASE_EN; + writel(r, pll->base_addr + REG_CON0); + } r = readl(pll->pwr_addr) | CON0_ISO_EN; writel(r, pll->pwr_addr); @@ -321,6 +337,8 @@ static struct clk *mtk_clk_register_pll(const struct mtk_pll_data *data, pll->tuner_addr = base + data->tuner_reg; if (data->tuner_en_reg) pll->tuner_en_addr = base + data->tuner_en_reg; + if (data->en_reg) + pll->en_addr = base + data->en_reg; pll->hw.init = &init; pll->data = data; -- 1.8.1.1.dirty _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel