From bdc3bbdd40ba90ce2953af01007036191572720b Mon Sep 17 00:00:00 2001 From: Amit Nischal Date: Thu, 8 Mar 2018 12:48:12 +0530 Subject: [PATCH] clk: qcom: Clear hardware clock control bit of RCG For upcoming targets like sdm845, POR value of the hardware clock control bit is set for most of root clocks which needs to be cleared for software to be able to control. For older targets like MSM8996, this bit is reserved bit and having POR value as 0 so this patch will work for the older targets too. So update the configuration mask to take care of the same to clear hardware clock control bit. Signed-off-by: Amit Nischal Signed-off-by: Stephen Boyd --- drivers/clk/qcom/clk-rcg2.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c index bbeaf9c..e63db10 100644 --- a/drivers/clk/qcom/clk-rcg2.c +++ b/drivers/clk/qcom/clk-rcg2.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2013, The Linux Foundation. All rights reserved. + * Copyright (c) 2013, 2018, The Linux Foundation. All rights reserved. * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and @@ -42,6 +42,7 @@ #define CFG_MODE_SHIFT 12 #define CFG_MODE_MASK (0x3 << CFG_MODE_SHIFT) #define CFG_MODE_DUAL_EDGE (0x2 << CFG_MODE_SHIFT) +#define CFG_HW_CLK_CTRL_MASK BIT(20) #define M_REG 0x8 #define N_REG 0xc @@ -276,7 +277,7 @@ static int clk_rcg2_configure(struct clk_rcg2 *rcg, const struct freq_tbl *f) } mask = BIT(rcg->hid_width) - 1; - mask |= CFG_SRC_SEL_MASK | CFG_MODE_MASK; + mask |= CFG_SRC_SEL_MASK | CFG_MODE_MASK | CFG_HW_CLK_CTRL_MASK; cfg = f->pre_div << CFG_SRC_DIV_SHIFT; cfg |= rcg->parent_map[index].cfg << CFG_SRC_SEL_SHIFT; if (rcg->mnd_width && f->n && (f->m != f->n)) -- 2.7.4