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Subject[PATCH 1/2] clk: qcom: clear hardware clock control bit of RCG
Date
For upcoming targets, the hardware clock control bit is set for most of
root clocks which needs to be cleared for software to be able to control
those root clocks. 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>
---
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 1a0985a..ac9ce61 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, 2017, 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))
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
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