linux-kernel - [PATCH v4] mips: bcm63xx: add support for clk_get

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Message-Id: <20211115004218.13034-1-rdunlap@infradead.org>
Date:   Sun, 14 Nov 2021 16:42:18 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        kernel test robot <lkp@...el.com>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Artur Rojek <contact@...ur-rojek.eu>,
        Paul Cercueil <paul@...pouillou.net>,
        linux-mips@...r.kernel.org, Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        linux-iio@...r.kernel.org, Florian Fainelli <f.fainelli@...il.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Russell King <linux@...linux.org.uk>,
        bcm-kernel-feedback-list@...adcom.com,
        Jonas Gorski <jonas.gorski@...il.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: [PATCH v4] mips: bcm63xx: add support for clk_get_parent()

BCM63XX selects HAVE_LEGACY_CLK but does not provide/support
clk_get_parent(), so add a simple implementation of that
function so that callers of it will build without errors.

Fixes these build errors:

mips-linux-ld: drivers/iio/adc/ingenic-adc.o: in function `jz4770_adc_init_clk_div':
ingenic-adc.c:(.text+0xe4): undefined reference to `clk_get_parent'
mips-linux-ld: drivers/iio/adc/ingenic-adc.o: in function `jz4725b_adc_init_clk_div':
ingenic-adc.c:(.text+0x1b8): undefined reference to `clk_get_parent'

Fixes: e7300d04bd08 ("MIPS: BCM63xx: Add support for the Broadcom BCM63xx family of SOCs." )
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Reported-by: kernel test robot <lkp@...el.com>
Suggested-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
Cc: Artur Rojek <contact@...ur-rojek.eu>
Cc: Paul Cercueil <paul@...pouillou.net>
Cc: linux-mips@...r.kernel.org
Cc: Jonathan Cameron <jic23@...nel.org>
Cc: Lars-Peter Clausen <lars@...afoo.de>
Cc: linux-iio@...r.kernel.org
Cc: Florian Fainelli <f.fainelli@...il.com>
Cc: Andy Shevchenko <andy.shevchenko@...il.com>
Cc: Russell King <linux@...linux.org.uk>
Cc: bcm-kernel-feedback-list@...adcom.com
Cc: Jonas Gorski <jonas.gorski@...il.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Acked-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
v1 and v2 were:
[PATCH] iio/adc: ingenic: fix (MIPS) ingenic-adc build errors
  (limiting this driver to MACH_INGENIC in Kconfig)
v3: add clk_get_parent() to arch/mips/bcm63xx/clk.c
v4:
  add Fixes:, Suggested-by:, Reviewed-by: Acked-by:
  drop blank line between function and EXPORT_SYMBOL(); (Andy)

 arch/mips/bcm63xx/clk.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- linux-next-20211112.orig/arch/mips/bcm63xx/clk.c
+++ linux-next-20211112/arch/mips/bcm63xx/clk.c
@@ -381,6 +381,12 @@ void clk_disable(struct clk *clk)
 
 EXPORT_SYMBOL(clk_disable);
 
+struct clk *clk_get_parent(struct clk *clk)
+{
+	return NULL;
+}
+EXPORT_SYMBOL(clk_get_parent);
+
 unsigned long clk_get_rate(struct clk *clk)
 {
 	if (!clk)