From: Peng Fan <peng.fan@nxp.com> To: "sboyd@kernel.org" <sboyd@kernel.org>, "shawnguo@kernel.org" <shawnguo@kernel.org>, "s.hauer@pengutronix.de" <s.hauer@pengutronix.de>, "festevam@gmail.com" <festevam@gmail.com>, Abel Vesa <abel.vesa@nxp.com> Cc: "kernel@pengutronix.de" <kernel@pengutronix.de>, dl-linux-imx <linux-imx@nxp.com>, Aisheng Dong <aisheng.dong@nxp.com>, "linux-clk@vger.kernel.org" <linux-clk@vger.kernel.org>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Leonard Crestez <leonard.crestez@nxp.com>, Alice Guo <alice.guo@nxp.com>, Peng Fan <peng.fan@nxp.com> Subject: [PATCH 2/2] clk: imx: composite-8m: use relaxed io api Date: Wed, 13 Nov 2019 10:02:09 +0000 [thread overview] Message-ID: <1573638817-4363-2-git-send-email-peng.fan@nxp.com> (raw) In-Reply-To: <1573638817-4363-1-git-send-email-peng.fan@nxp.com> From: Peng Fan <peng.fan@nxp.com> It is ok to use relaxed api here, no need to use stronger readl/writel Signed-off-by: Peng Fan <peng.fan@nxp.com> --- drivers/clk/imx/clk-composite-8m.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/clk/imx/clk-composite-8m.c b/drivers/clk/imx/clk-composite-8m.c index 20f7c91c03d2..513dc57483d0 100644 --- a/drivers/clk/imx/clk-composite-8m.c +++ b/drivers/clk/imx/clk-composite-8m.c @@ -31,14 +31,14 @@ static unsigned long imx8m_clk_composite_divider_recalc_rate(struct clk_hw *hw, unsigned int prediv_value; unsigned int div_value; - prediv_value = readl(divider->reg) >> divider->shift; + prediv_value = readl_relaxed(divider->reg) >> divider->shift; prediv_value &= clk_div_mask(divider->width); prediv_rate = divider_recalc_rate(hw, parent_rate, prediv_value, NULL, divider->flags, divider->width); - div_value = readl(divider->reg) >> PCG_DIV_SHIFT; + div_value = readl_relaxed(divider->reg) >> PCG_DIV_SHIFT; div_value &= clk_div_mask(PCG_DIV_WIDTH); return divider_recalc_rate(hw, prediv_rate, div_value, NULL, @@ -104,13 +104,13 @@ static int imx8m_clk_composite_divider_set_rate(struct clk_hw *hw, spin_lock_irqsave(divider->lock, flags); - val = readl(divider->reg); + val = readl_relaxed(divider->reg); val &= ~((clk_div_mask(divider->width) << divider->shift) | (clk_div_mask(PCG_DIV_WIDTH) << PCG_DIV_SHIFT)); val |= (u32)(prediv_value - 1) << divider->shift; val |= (u32)(div_value - 1) << PCG_DIV_SHIFT; - writel(val, divider->reg); + writel_relaxed(val, divider->reg); spin_unlock_irqrestore(divider->lock, flags); -- 2.16.4
WARNING: multiple messages have this Message-ID (diff)
From: Peng Fan <peng.fan@nxp.com> To: "sboyd@kernel.org" <sboyd@kernel.org>, "shawnguo@kernel.org" <shawnguo@kernel.org>, "s.hauer@pengutronix.de" <s.hauer@pengutronix.de>, "festevam@gmail.com" <festevam@gmail.com>, Abel Vesa <abel.vesa@nxp.com> Cc: Aisheng Dong <aisheng.dong@nxp.com>, Peng Fan <peng.fan@nxp.com>, Alice Guo <alice.guo@nxp.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, dl-linux-imx <linux-imx@nxp.com>, "kernel@pengutronix.de" <kernel@pengutronix.de>, Leonard Crestez <leonard.crestez@nxp.com>, "linux-clk@vger.kernel.org" <linux-clk@vger.kernel.org>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org> Subject: [PATCH 2/2] clk: imx: composite-8m: use relaxed io api Date: Wed, 13 Nov 2019 10:02:09 +0000 [thread overview] Message-ID: <1573638817-4363-2-git-send-email-peng.fan@nxp.com> (raw) In-Reply-To: <1573638817-4363-1-git-send-email-peng.fan@nxp.com> From: Peng Fan <peng.fan@nxp.com> It is ok to use relaxed api here, no need to use stronger readl/writel Signed-off-by: Peng Fan <peng.fan@nxp.com> --- drivers/clk/imx/clk-composite-8m.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/clk/imx/clk-composite-8m.c b/drivers/clk/imx/clk-composite-8m.c index 20f7c91c03d2..513dc57483d0 100644 --- a/drivers/clk/imx/clk-composite-8m.c +++ b/drivers/clk/imx/clk-composite-8m.c @@ -31,14 +31,14 @@ static unsigned long imx8m_clk_composite_divider_recalc_rate(struct clk_hw *hw, unsigned int prediv_value; unsigned int div_value; - prediv_value = readl(divider->reg) >> divider->shift; + prediv_value = readl_relaxed(divider->reg) >> divider->shift; prediv_value &= clk_div_mask(divider->width); prediv_rate = divider_recalc_rate(hw, parent_rate, prediv_value, NULL, divider->flags, divider->width); - div_value = readl(divider->reg) >> PCG_DIV_SHIFT; + div_value = readl_relaxed(divider->reg) >> PCG_DIV_SHIFT; div_value &= clk_div_mask(PCG_DIV_WIDTH); return divider_recalc_rate(hw, prediv_rate, div_value, NULL, @@ -104,13 +104,13 @@ static int imx8m_clk_composite_divider_set_rate(struct clk_hw *hw, spin_lock_irqsave(divider->lock, flags); - val = readl(divider->reg); + val = readl_relaxed(divider->reg); val &= ~((clk_div_mask(divider->width) << divider->shift) | (clk_div_mask(PCG_DIV_WIDTH) << PCG_DIV_SHIFT)); val |= (u32)(prediv_value - 1) << divider->shift; val |= (u32)(div_value - 1) << PCG_DIV_SHIFT; - writel(val, divider->reg); + writel_relaxed(val, divider->reg); spin_unlock_irqrestore(divider->lock, flags); -- 2.16.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-11-13 10:02 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-11-13 10:02 [PATCH 1/2] clk: imx: sccg: use relaxed io api Peng Fan 2019-11-13 10:02 ` Peng Fan 2019-11-13 10:02 ` Peng Fan [this message] 2019-11-13 10:02 ` [PATCH 2/2] clk: imx: composite-8m: " Peng Fan
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