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Message-ID: <20130611091008.GA9216@laptop>
Date: Tue, 11 Jun 2013 10:10:08 +0100
From: Lee Jones <lee.jones@...aro.org>
To: Ulf Hansson <ulf.hansson@...aro.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
arnd@...db.de, linus.walleij@...ricsson.com,
srinidhi.kasagar@...ricsson.com,
Mike Turquette <mturquette@...aro.org>
Subject: Re: [PATCH 21/33] clk: ux500: Add Device Tree support for the PRCC
Kernel clock
> > This patch enables clocks to be specified from Device Tree via phandles
> > to the "prcc-kernel-clock" node.
> >
> > Cc: Mike Turquette <mturquette@...aro.org>
> > Cc: Ulf Hansson <ulf.hansson@...aro.org>
> > Signed-off-by: Lee Jones <lee.jones@...aro.org>
>
> Could you please fold this patch into a "common PRCC device tree
> support" patch instead. Thus handling both P and K clocks in the same
> patch.
I'm really not a fan of creating massive patches, so I'd really rather
not.
> That would probaby solve the missmatch of the macro definitions as
> well. Like were did the PRCC_KCLK_STORE come from?
I do see your point though, I will move PRCC_KCLK_STORE() into this
patch.
> > ---
> > drivers/clk/ux500/u8500_clk.c | 30 ++++++++++++++++++++++++++++++
> > 1 file changed, 30 insertions(+)
> >
> > diff --git a/drivers/clk/ux500/u8500_clk.c b/drivers/clk/ux500/u8500_clk.c
> > index 86de1a7..c3ed09c 100644
> > --- a/drivers/clk/ux500/u8500_clk.c
> > +++ b/drivers/clk/ux500/u8500_clk.c
> > @@ -20,6 +20,7 @@
> >
> > static struct clk *prcmu_clk[PRCMU_NUM_CLKS];
> > static struct clk *prcc_pclk[(PRCC_NUM_PERIPH_CLUSTERS + 1) * PRCC_PERIPHS_PER_CLUSTER];
> > +static struct clk *prcc_kclk[(PRCC_NUM_PERIPH_CLUSTERS + 1) * PRCC_PERIPHS_PER_CLUSTER];
> >
> > #define PRCC_SHOW(clk, base, bit) \
> > clk[(base * PRCC_PERIPHS_PER_CLUSTER) + bit]
> > @@ -540,110 +541,136 @@ void u8500_clk_init(u32 clkrst1_base, u32 clkrst2_base, u32 clkrst3_base,
> > clk = clk_reg_prcc_kclk("p1_uart0_kclk", "uartclk",
> > clkrst1_base, BIT(0), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "uart0");
> > + PRCC_KCLK_STORE(clk, 1, 0);
> >
> > clk = clk_reg_prcc_kclk("p1_uart1_kclk", "uartclk",
> > clkrst1_base, BIT(1), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "uart1");
> > + PRCC_KCLK_STORE(clk, 1, 1);
> >
> > clk = clk_reg_prcc_kclk("p1_i2c1_kclk", "i2cclk",
> > clkrst1_base, BIT(2), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "nmk-i2c.1");
> > + PRCC_KCLK_STORE(clk, 1, 2);
> >
> > clk = clk_reg_prcc_kclk("p1_msp0_kclk", "msp02clk",
> > clkrst1_base, BIT(3), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "msp0");
> > clk_register_clkdev(clk, NULL, "ux500-msp-i2s.0");
> > + PRCC_KCLK_STORE(clk, 1, 3);
> >
> > clk = clk_reg_prcc_kclk("p1_msp1_kclk", "msp1clk",
> > clkrst1_base, BIT(4), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "msp1");
> > clk_register_clkdev(clk, NULL, "ux500-msp-i2s.1");
> > + PRCC_KCLK_STORE(clk, 1, 4);
> >
> > clk = clk_reg_prcc_kclk("p1_sdi0_kclk", "sdmmcclk",
> > clkrst1_base, BIT(5), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "sdi0");
> > + PRCC_KCLK_STORE(clk, 1, 5);
> >
> > clk = clk_reg_prcc_kclk("p1_i2c2_kclk", "i2cclk",
> > clkrst1_base, BIT(6), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "nmk-i2c.2");
> > + PRCC_KCLK_STORE(clk, 1, 6);
> >
> > clk = clk_reg_prcc_kclk("p1_slimbus0_kclk", "slimclk",
> > clkrst1_base, BIT(8), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "slimbus0");
> > + PRCC_KCLK_STORE(clk, 1, 8);
> >
> > clk = clk_reg_prcc_kclk("p1_i2c4_kclk", "i2cclk",
> > clkrst1_base, BIT(9), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "nmk-i2c.4");
> > + PRCC_KCLK_STORE(clk, 1, 9);
> >
> > clk = clk_reg_prcc_kclk("p1_msp3_kclk", "msp1clk",
> > clkrst1_base, BIT(10), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "msp3");
> > clk_register_clkdev(clk, NULL, "ux500-msp-i2s.3");
> > + PRCC_KCLK_STORE(clk, 1, 10);
> >
> > /* Periph2 */
> > clk = clk_reg_prcc_kclk("p2_i2c3_kclk", "i2cclk",
> > clkrst2_base, BIT(0), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "nmk-i2c.3");
> > + PRCC_KCLK_STORE(clk, 2, 0);
> >
> > clk = clk_reg_prcc_kclk("p2_sdi4_kclk", "sdmmcclk",
> > clkrst2_base, BIT(2), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "sdi4");
> > + PRCC_KCLK_STORE(clk, 2, 2);
> >
> > clk = clk_reg_prcc_kclk("p2_msp2_kclk", "msp02clk",
> > clkrst2_base, BIT(3), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "msp2");
> > clk_register_clkdev(clk, NULL, "ux500-msp-i2s.2");
> > + PRCC_KCLK_STORE(clk, 2, 3);
> >
> > clk = clk_reg_prcc_kclk("p2_sdi1_kclk", "sdmmcclk",
> > clkrst2_base, BIT(4), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "sdi1");
> > + PRCC_KCLK_STORE(clk, 2, 4);
> >
> > clk = clk_reg_prcc_kclk("p2_sdi3_kclk", "sdmmcclk",
> > clkrst2_base, BIT(5), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "sdi3");
> > + PRCC_KCLK_STORE(clk, 2, 5);
> >
> > /* Note that rate is received from parent. */
> > clk = clk_reg_prcc_kclk("p2_ssirx_kclk", "hsirxclk",
> > clkrst2_base, BIT(6),
> > CLK_SET_RATE_GATE|CLK_SET_RATE_PARENT);
> > + PRCC_KCLK_STORE(clk, 2, 6);
> > +
> > clk = clk_reg_prcc_kclk("p2_ssitx_kclk", "hsitxclk",
> > clkrst2_base, BIT(7),
> > CLK_SET_RATE_GATE|CLK_SET_RATE_PARENT);
> > + PRCC_KCLK_STORE(clk, 2, 7);
> >
> > /* Periph3 */
> > clk = clk_reg_prcc_kclk("p3_ssp0_kclk", "sspclk",
> > clkrst3_base, BIT(1), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "ssp0");
> > + PRCC_KCLK_STORE(clk, 3, 1);
> >
> > clk = clk_reg_prcc_kclk("p3_ssp1_kclk", "sspclk",
> > clkrst3_base, BIT(2), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "ssp1");
> > + PRCC_KCLK_STORE(clk, 3, 2);
> >
> > clk = clk_reg_prcc_kclk("p3_i2c0_kclk", "i2cclk",
> > clkrst3_base, BIT(3), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "nmk-i2c.0");
> > + PRCC_KCLK_STORE(clk, 3, 3);
> >
> > clk = clk_reg_prcc_kclk("p3_sdi2_kclk", "sdmmcclk",
> > clkrst3_base, BIT(4), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "sdi2");
> > + PRCC_KCLK_STORE(clk, 3, 4);
> >
> > clk = clk_reg_prcc_kclk("p3_ske_kclk", "rtc32k",
> > clkrst3_base, BIT(5), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "ske");
> > clk_register_clkdev(clk, NULL, "nmk-ske-keypad");
> > + PRCC_KCLK_STORE(clk, 3, 5);
> >
> > clk = clk_reg_prcc_kclk("p3_uart2_kclk", "uartclk",
> > clkrst3_base, BIT(6), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "uart2");
> > + PRCC_KCLK_STORE(clk, 3, 6);
> >
> > clk = clk_reg_prcc_kclk("p3_sdi5_kclk", "sdmmcclk",
> > clkrst3_base, BIT(7), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "sdi5");
> > + PRCC_KCLK_STORE(clk, 3, 7);
> >
> > /* Periph6 */
> > clk = clk_reg_prcc_kclk("p3_rng_kclk", "rngclk",
> > clkrst6_base, BIT(0), CLK_SET_RATE_GATE);
> > clk_register_clkdev(clk, NULL, "rng");
> > + PRCC_KCLK_STORE(clk, 6, 0);
> >
> > if (of_have_populated_dt())
> > np = of_find_matching_node(NULL, u8500_clk_of_match);
> > @@ -660,5 +687,8 @@ void u8500_clk_init(u32 clkrst1_base, u32 clkrst2_base, u32 clkrst3_base,
> > }
> > if (!of_node_cmp(child->name, "prcc-periph-clock"))
> > of_clk_add_provider(child, ux500_twocell_get, prcc_pclk);
> > +
> > + if (!of_node_cmp(child->name, "prcc-kernel-clock"))
> > + of_clk_add_provider(child, ux500_twocell_get, prcc_kclk);
> > }
> > }
> >
--
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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