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Commit 6e4ad1b4 authored by Purna Chandra Mandal's avatar Purna Chandra Mandal Committed by Ralf Baechle
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MIPS: pic32mzda: fix getting timer clock rate. 



PIC32 clock driver is now implemented as platform driver instead of
as part of of_clk_init(). It meants all the clock modules are available
quite late in the boot sequence. So request for CPU clock by clk_get_sys()
and clk_get_rate() to find c0_timer rate fails.

To fix this use PIC32 specific early clock functions implemented for early
console support.

Signed-off-by: default avatarPurna Chandra Mandal <purna.mandal@microchip.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: Joshua Henderson <digitalpeer@digitalpeer.com>
Patchwork: https://patchwork.linux-mips.org/patch/13262/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 9184dc8f

arch/mips/pic32/pic32mzda/time.c

+4 −9
Original line number Diff line number Diff line
@@ -11,13 +11,12 @@ 
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 *  for more details.

 */

#include <linux/clk.h>

#include <linux/clk-provider.h>

#include <linux/clocksource.h>

#include <linux/init.h>

#include <linux/irqdomain.h>

#include <linux/of.h>

#include <linux/of_irq.h>

#include <linux/irqdomain.h>



#include <asm/time.h>
@@ -58,16 +57,12 @@ unsigned int get_c0_compare_int(void) 


void __init plat_time_init(void)

{

	struct clk *clk;

	unsigned long rate = pic32_get_pbclk(7);



	of_clk_init(NULL);

	clk = clk_get_sys("cpu_clk", NULL);

	if (IS_ERR(clk))

		panic("unable to get CPU clock, err=%ld", PTR_ERR(clk));



	clk_prepare_enable(clk);

	pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000);

	mips_hpt_frequency = clk_get_rate(clk) / 2;

	pr_info("CPU Clock: %ldMHz\n", rate / 1000000);

	mips_hpt_frequency = rate / 2;



	clocksource_probe();

}