linux-kernel - [PATCH 4.19 62/98] clk: socfpga: stratix10: fix rate caclulationg for cnt

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Message-Id: <20190827072721.565982867@linuxfoundation.org>
Date:   Tue, 27 Aug 2019 09:50:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dinh Nguyen <dinguyen@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>
Subject: [PATCH 4.19 62/98] clk: socfpga: stratix10: fix rate caclulationg for cnt_clks

From: Dinh Nguyen <dinguyen@...nel.org>

commit c7ec75ea4d5316518adc87224e3cff47192579e7 upstream.

Checking bypass_reg is incorrect for calculating the cnt_clk rates.
Instead we should be checking that there is a proper hardware register
that holds the clock divider.

Cc: stable@...r.kernel.org
Signed-off-by: Dinh Nguyen <dinguyen@...nel.org>
Link: https://lkml.kernel.org/r/20190814153014.12962-1-dinguyen@kernel.org
Signed-off-by: Stephen Boyd <sboyd@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/clk/socfpga/clk-periph-s10.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/clk/socfpga/clk-periph-s10.c
+++ b/drivers/clk/socfpga/clk-periph-s10.c
@@ -37,7 +37,7 @@ static unsigned long clk_peri_cnt_clk_re
 	if (socfpgaclk->fixed_div) {
 		div = socfpgaclk->fixed_div;
 	} else {
-		if (!socfpgaclk->bypass_reg)
+		if (socfpgaclk->hw.reg)
 			div = ((readl(socfpgaclk->hw.reg) & 0x7ff) + 1);
 	}