From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B048218C03E; Tue, 10 Sep 2024 10:20:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725963620; cv=none; b=urzo/XbI/IPeY/DhVR759B8SddG8/YKZak1+GtqEA4ypcuoNcn192HXZ/yVuoY71L9MgXMkBYWlwbxSmY705FF2e10yuzzOtx/y7a44pSM4cVHDKoWLAhY+2O4MFJ9KKVt/QSKADV8m1Lu2v+R6Kz6jdSDS4TaoU2n+JeWJEYiQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725963620; c=relaxed/simple; bh=fCYacT93f/SZoGv9SgJZ5V8MSpN3Y4hgOkegiH5VCaA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XpYYX97IHiPfgsgrFHAkNwEHVzLqyyEefhJA+oZfyvJ2p+CWprIJDc+Fi4q30L93v5Ty0AzS+KJDYO7Kon3SCVKvPbCDaMiYZ6D+/czYfHY/WMyf+OmWcHtykaAT6gApcM0pSDy+CuoXeJA3PD58nNFatdrNsE3bOpGJihqPnW0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ZP7/7OCe; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ZP7/7OCe" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DFD58C4CEC3; Tue, 10 Sep 2024 10:20:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1725963620; bh=fCYacT93f/SZoGv9SgJZ5V8MSpN3Y4hgOkegiH5VCaA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZP7/7OCeU5fvZGT56TqRsFdKhJccDfST4QCe7wLlto8gpxhqzOC7yAxU5B8nT5qzs Zs0b4KNbonT+k6mJay7wwftFJxeZ9izHSUpefYZqArushtHcTK2S2v38nCMqgRGMLU GqnOLSgqlyfcK9eqrdM2UlUv7q2vdGOni45F5UXw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Satya Priya Kakitapalli , Dmitry Baryshkov , Bjorn Andersson Subject: [PATCH 5.15 083/214] clk: qcom: clk-alpha-pll: Update set_rate for Zonda PLL Date: Tue, 10 Sep 2024 11:31:45 +0200 Message-ID: <20240910092602.128357067@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240910092558.714365667@linuxfoundation.org> References: <20240910092558.714365667@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Satya Priya Kakitapalli commit f4973130d255dd4811006f5822d4fa4d0de9d712 upstream. The Zonda PLL has a 16 bit signed alpha and in the cases where the alpha value is greater than 0.5, the L value needs to be adjusted accordingly. Thus update the logic to handle the signed alpha val. Fixes: f21b6bfecc27 ("clk: qcom: clk-alpha-pll: add support for zonda pll") Cc: stable@vger.kernel.org Signed-off-by: Satya Priya Kakitapalli Reviewed-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20240731062916.2680823-5-quic_skakitap@quicinc.com Signed-off-by: Bjorn Andersson Signed-off-by: Greg Kroah-Hartman --- drivers/clk/qcom/clk-alpha-pll.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) --- a/drivers/clk/qcom/clk-alpha-pll.c +++ b/drivers/clk/qcom/clk-alpha-pll.c @@ -39,6 +39,7 @@ #define PLL_USER_CTL(p) ((p)->offset + (p)->regs[PLL_OFF_USER_CTL]) # define PLL_POST_DIV_SHIFT 8 # define PLL_POST_DIV_MASK(p) GENMASK((p)->width - 1, 0) +# define PLL_ALPHA_MSB BIT(15) # define PLL_ALPHA_EN BIT(24) # define PLL_ALPHA_MODE BIT(25) # define PLL_VCO_SHIFT 20 @@ -1913,6 +1914,18 @@ static void clk_zonda_pll_disable(struct regmap_write(regmap, PLL_OPMODE(pll), 0x0); } +static void zonda_pll_adjust_l_val(unsigned long rate, unsigned long prate, u32 *l) +{ + u64 remainder, quotient; + + quotient = rate; + remainder = do_div(quotient, prate); + *l = quotient; + + if ((remainder * 2) / prate) + *l = *l + 1; +} + static int clk_zonda_pll_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long prate) { @@ -1929,6 +1942,9 @@ static int clk_zonda_pll_set_rate(struct if (ret < 0) return ret; + if (a & PLL_ALPHA_MSB) + zonda_pll_adjust_l_val(rate, prate, &l); + regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL(pll), a); regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l);