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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 <anischal@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
hifive-unleashed-5.1
Amit Nischal 2018-03-08 12:48:12 +05:30 committed by Stephen Boyd
parent 7928b2cbe5
commit bdc3bbdd40
1 changed files with 3 additions and 2 deletions
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5
drivers/clk/qcom/clk-rcg2.c
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@ -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))