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Commit 9bb87c02 authored by Stephen Boyd's avatar Stephen Boyd
Browse files

Merge tag 'v4.9-rockchip-clk1' of... 

Merge tag 'v4.9-rockchip-clk1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into clk-next

Pull rockchip clk driver updates from Heiko Stuebner:

The biggest addition is probably the special clock-type for ddr clock
control. While reading that clock is done the normal way from the
registers, setting it always requires some sort of special handling
to let the system survive this addition.

As the commit message explains, there are currently 3 handling-types
known. General SRAM-based code on rk3288 and before (which is waiting
essentially for the PIE support that is currently being worked on),
SCPI-based clk setting on the rk3368 through a coprocessor, which we
might support once the support for legacy scpi-variants has matured
and now on the rk3399 (and probably later) using a dcf controller that
is controlled from the arm-trusted-firmware and gets accessed through
firmware calls from the kernel. This is the variant we currently
support, but the clock type is made to support the other variants in
the future as well.

Apart from that slightly bigger chunk, we have a mix of PLL rates,
clock-ids and flags mainly for the rk3399.

And interestingly an iomap fix for the legacy gate driver, where I
hopefully could deter the submitter from actually using that in any
new works.

* tag 'v4.9-rockchip-clk1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
  clk: rockchip: use the dclk_vop_frac clock ids on rk3399
  clk: rockchip: drop CLK_SET_RATE_PARENT from rk3399 fractional dividers
  clk: rockchip: add 2016M to big cpu clk rate table on rk3399
  clk: rockchip: add rk3399 ddr clock support
  clk: rockchip: add dclk_vop_frac ids for rk3399 vop
  clk: rockchip: add new clock-type for the ddrclk
  soc: rockchip: add header for ddr rate SIP interface
  clk: rockchip: add SCLK_DDRC id for rk3399 ddrc
  clk: rockchip: handle of_iomap failures in legacy clock driver
  clk: rockchip: mark rk3399 hdcp_noc and vio_noc as critical
  clk: rockchip: use general clock flag when registering pll
  clk: rockchip: delete the CLK_IGNORE_UNUSED from aclk_pcie on rk3399
  clk: rockchip: add 65MHz and 106.5MHz rates to rk3399 plls used for HDMI
parents fedc81e7 7b0f9e35

drivers/clk/rockchip/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ obj-y += clk-pll.o 
obj-y	+= clk-cpu.o

obj-y	+= clk-inverter.o

obj-y	+= clk-mmc-phase.o

obj-y	+= clk-ddr.o

obj-$(CONFIG_RESET_CONTROLLER)	+= softrst.o



obj-y	+= clk-rk3036.o

drivers/clk/rockchip/clk-ddr.c

0 → 100644
+154 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2016 Rockchip Electronics Co. Ltd.

 * Author: Lin Huang <hl@rock-chips.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */



#include <linux/arm-smccc.h>

#include <linux/clk.h>

#include <linux/clk-provider.h>

#include <linux/io.h>

#include <linux/slab.h>

#include <soc/rockchip/rockchip_sip.h>

#include "clk.h"



struct rockchip_ddrclk {

	struct clk_hw	hw;

	void __iomem	*reg_base;

	int		mux_offset;

	int		mux_shift;

	int		mux_width;

	int		div_shift;

	int		div_width;

	int		ddr_flag;

	spinlock_t	*lock;

};



#define to_rockchip_ddrclk_hw(hw) container_of(hw, struct rockchip_ddrclk, hw)



static int rockchip_ddrclk_sip_set_rate(struct clk_hw *hw, unsigned long drate,

					unsigned long prate)

{

	struct rockchip_ddrclk *ddrclk = to_rockchip_ddrclk_hw(hw);

	unsigned long flags;

	struct arm_smccc_res res;



	spin_lock_irqsave(ddrclk->lock, flags);

	arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, drate, 0,

		      ROCKCHIP_SIP_CONFIG_DRAM_SET_RATE,

		      0, 0, 0, 0, &res);

	spin_unlock_irqrestore(ddrclk->lock, flags);



	return res.a0;

}



static unsigned long

rockchip_ddrclk_sip_recalc_rate(struct clk_hw *hw,

				unsigned long parent_rate)

{

	struct arm_smccc_res res;



	arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, 0, 0,

		      ROCKCHIP_SIP_CONFIG_DRAM_GET_RATE,

		      0, 0, 0, 0, &res);



	return res.a0;

}



static long rockchip_ddrclk_sip_round_rate(struct clk_hw *hw,

					   unsigned long rate,

					   unsigned long *prate)

{

	struct arm_smccc_res res;



	arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, rate, 0,

		      ROCKCHIP_SIP_CONFIG_DRAM_ROUND_RATE,

		      0, 0, 0, 0, &res);



	return res.a0;

}



static u8 rockchip_ddrclk_get_parent(struct clk_hw *hw)

{

	struct rockchip_ddrclk *ddrclk = to_rockchip_ddrclk_hw(hw);

	int num_parents = clk_hw_get_num_parents(hw);

	u32 val;



	val = clk_readl(ddrclk->reg_base +

			ddrclk->mux_offset) >> ddrclk->mux_shift;

	val &= GENMASK(ddrclk->mux_width - 1, 0);



	if (val >= num_parents)

		return -EINVAL;



	return val;

}



static const struct clk_ops rockchip_ddrclk_sip_ops = {

	.recalc_rate = rockchip_ddrclk_sip_recalc_rate,

	.set_rate = rockchip_ddrclk_sip_set_rate,

	.round_rate = rockchip_ddrclk_sip_round_rate,

	.get_parent = rockchip_ddrclk_get_parent,

};



struct clk *rockchip_clk_register_ddrclk(const char *name, int flags,

					 const char *const *parent_names,

					 u8 num_parents, int mux_offset,

					 int mux_shift, int mux_width,

					 int div_shift, int div_width,

					 int ddr_flag, void __iomem *reg_base,

					 spinlock_t *lock)

{

	struct rockchip_ddrclk *ddrclk;

	struct clk_init_data init;

	struct clk *clk;



	ddrclk = kzalloc(sizeof(*ddrclk), GFP_KERNEL);

	if (!ddrclk)

		return ERR_PTR(-ENOMEM);



	init.name = name;

	init.parent_names = parent_names;

	init.num_parents = num_parents;



	init.flags = flags;

	init.flags |= CLK_SET_RATE_NO_REPARENT;



	switch (ddr_flag) {

	case ROCKCHIP_DDRCLK_SIP:

		init.ops = &rockchip_ddrclk_sip_ops;

		break;

	default:

		pr_err("%s: unsupported ddrclk type %d\n", __func__, ddr_flag);

		kfree(ddrclk);

		return ERR_PTR(-EINVAL);

	}



	ddrclk->reg_base = reg_base;

	ddrclk->lock = lock;

	ddrclk->hw.init = &init;

	ddrclk->mux_offset = mux_offset;

	ddrclk->mux_shift = mux_shift;

	ddrclk->mux_width = mux_width;

	ddrclk->div_shift = div_shift;

	ddrclk->div_width = div_width;

	ddrclk->ddr_flag = ddr_flag;



	clk = clk_register(NULL, &ddrclk->hw);

	if (IS_ERR(clk)) {

		pr_err("%s: could not register ddrclk %s\n", __func__,	name);

		kfree(ddrclk);

		return NULL;

	}



	return clk;

}

drivers/clk/rockchip/clk-pll.c

+2 −2
Original line number Diff line number Diff line
@@ -837,7 +837,7 @@ struct clk *rockchip_clk_register_pll(struct rockchip_clk_provider *ctx, 
		u8 num_parents, int con_offset, int grf_lock_offset,

		int lock_shift, int mode_offset, int mode_shift,

		struct rockchip_pll_rate_table *rate_table,

		u8 clk_pll_flags)

		unsigned long flags, u8 clk_pll_flags)

{

	const char *pll_parents[3];

	struct clk_init_data init;
@@ -892,7 +892,7 @@ struct clk *rockchip_clk_register_pll(struct rockchip_clk_provider *ctx, 
	init.name = pll_name;



	/* keep all plls untouched for now */

	init.flags = CLK_IGNORE_UNUSED;

	init.flags = flags | CLK_IGNORE_UNUSED;



	init.parent_names = &parent_names[0];

	init.num_parents = 1;

drivers/clk/rockchip/clk-rk3399.c

+41 −15
Original line number Diff line number Diff line
@@ -100,8 +100,10 @@ static struct rockchip_pll_rate_table rk3399_pll_rates[] = { 
	RK3036_PLL_RATE( 297000000, 1, 99, 4, 2, 1, 0),

	RK3036_PLL_RATE( 216000000, 1, 72, 4, 2, 1, 0),

	RK3036_PLL_RATE( 148500000, 1, 99, 4, 4, 1, 0),

	RK3036_PLL_RATE( 106500000, 1, 71, 4, 4, 1, 0),

	RK3036_PLL_RATE(  96000000, 1, 64, 4, 4, 1, 0),

	RK3036_PLL_RATE(  74250000, 2, 99, 4, 4, 1, 0),

	RK3036_PLL_RATE(  65000000, 1, 65, 6, 4, 1, 0),

	RK3036_PLL_RATE(  54000000, 1, 54, 6, 4, 1, 0),

	RK3036_PLL_RATE(  27000000, 1, 27, 6, 4, 1, 0),

	{ /* sentinel */ },
@@ -118,6 +120,10 @@ PNAME(mux_armclkb_p) = { "clk_core_b_lpll_src", 
						    "clk_core_b_bpll_src",

						    "clk_core_b_dpll_src",

						    "clk_core_b_gpll_src" };

PNAME(mux_ddrclk_p)				= { "clk_ddrc_lpll_src",

						    "clk_ddrc_bpll_src",

						    "clk_ddrc_dpll_src",

						    "clk_ddrc_gpll_src" };

PNAME(mux_aclk_cci_p)				= { "cpll_aclk_cci_src",

						    "gpll_aclk_cci_src",

						    "npll_aclk_cci_src",
@@ -373,6 +379,7 @@ static struct rockchip_cpuclk_rate_table rk3399_cpuclkb_rates[] __initdata = { 
	RK3399_CPUCLKB_RATE(2184000000, 1, 11, 11),

	RK3399_CPUCLKB_RATE(2088000000, 1, 10, 10),

	RK3399_CPUCLKB_RATE(2040000000, 1, 10, 10),

	RK3399_CPUCLKB_RATE(2016000000, 1, 9, 9),

	RK3399_CPUCLKB_RATE(1992000000, 1, 9, 9),

	RK3399_CPUCLKB_RATE(1896000000, 1, 9, 9),

	RK3399_CPUCLKB_RATE(1800000000, 1, 8, 8),
@@ -578,7 +585,7 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = { 
	COMPOSITE(0, "clk_spdif_div", mux_pll_src_cpll_gpll_p, 0,

			RK3399_CLKSEL_CON(32), 7, 1, MFLAGS, 0, 7, DFLAGS,

			RK3399_CLKGATE_CON(8), 13, GFLAGS),

	COMPOSITE_FRACMUX(0, "clk_spdif_frac", "clk_spdif_div", CLK_SET_RATE_PARENT,

	COMPOSITE_FRACMUX(0, "clk_spdif_frac", "clk_spdif_div", 0,

			RK3399_CLKSEL_CON(99), 0,

			RK3399_CLKGATE_CON(8), 14, GFLAGS,

			&rk3399_spdif_fracmux),
@@ -592,7 +599,7 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = { 
	COMPOSITE(0, "clk_i2s0_div", mux_pll_src_cpll_gpll_p, 0,

			RK3399_CLKSEL_CON(28), 7, 1, MFLAGS, 0, 7, DFLAGS,

			RK3399_CLKGATE_CON(8), 3, GFLAGS),

	COMPOSITE_FRACMUX(0, "clk_i2s0_frac", "clk_i2s0_div", CLK_SET_RATE_PARENT,

	COMPOSITE_FRACMUX(0, "clk_i2s0_frac", "clk_i2s0_div", 0,

			RK3399_CLKSEL_CON(96), 0,

			RK3399_CLKGATE_CON(8), 4, GFLAGS,

			&rk3399_i2s0_fracmux),
@@ -602,7 +609,7 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = { 
	COMPOSITE(0, "clk_i2s1_div", mux_pll_src_cpll_gpll_p, 0,

			RK3399_CLKSEL_CON(29), 7, 1, MFLAGS, 0, 7, DFLAGS,

			RK3399_CLKGATE_CON(8), 6, GFLAGS),

	COMPOSITE_FRACMUX(0, "clk_i2s1_frac", "clk_i2s1_div", CLK_SET_RATE_PARENT,

	COMPOSITE_FRACMUX(0, "clk_i2s1_frac", "clk_i2s1_div", 0,

			RK3399_CLKSEL_CON(97), 0,

			RK3399_CLKGATE_CON(8), 7, GFLAGS,

			&rk3399_i2s1_fracmux),
@@ -612,7 +619,7 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = { 
	COMPOSITE(0, "clk_i2s2_div", mux_pll_src_cpll_gpll_p, 0,

			RK3399_CLKSEL_CON(30), 7, 1, MFLAGS, 0, 7, DFLAGS,

			RK3399_CLKGATE_CON(8), 9, GFLAGS),

	COMPOSITE_FRACMUX(0, "clk_i2s2_frac", "clk_i2s2_div", CLK_SET_RATE_PARENT,

	COMPOSITE_FRACMUX(0, "clk_i2s2_frac", "clk_i2s2_div", 0,

			RK3399_CLKSEL_CON(98), 0,

			RK3399_CLKGATE_CON(8), 10, GFLAGS,

			&rk3399_i2s2_fracmux),
@@ -631,7 +638,7 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = { 
	COMPOSITE_NOMUX(0, "clk_uart0_div", "clk_uart0_src", 0,

			RK3399_CLKSEL_CON(33), 0, 7, DFLAGS,

			RK3399_CLKGATE_CON(9), 0, GFLAGS),

	COMPOSITE_FRACMUX(0, "clk_uart0_frac", "clk_uart0_div", CLK_SET_RATE_PARENT,

	COMPOSITE_FRACMUX(0, "clk_uart0_frac", "clk_uart0_div", 0,

			RK3399_CLKSEL_CON(100), 0,

			RK3399_CLKGATE_CON(9), 1, GFLAGS,

			&rk3399_uart0_fracmux),
@@ -641,7 +648,7 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = { 
	COMPOSITE_NOMUX(0, "clk_uart1_div", "clk_uart_src", 0,

			RK3399_CLKSEL_CON(34), 0, 7, DFLAGS,

			RK3399_CLKGATE_CON(9), 2, GFLAGS),

	COMPOSITE_FRACMUX(0, "clk_uart1_frac", "clk_uart1_div", CLK_SET_RATE_PARENT,

	COMPOSITE_FRACMUX(0, "clk_uart1_frac", "clk_uart1_div", 0,

			RK3399_CLKSEL_CON(101), 0,

			RK3399_CLKGATE_CON(9), 3, GFLAGS,

			&rk3399_uart1_fracmux),
@@ -649,7 +656,7 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = { 
	COMPOSITE_NOMUX(0, "clk_uart2_div", "clk_uart_src", 0,

			RK3399_CLKSEL_CON(35), 0, 7, DFLAGS,

			RK3399_CLKGATE_CON(9), 4, GFLAGS),

	COMPOSITE_FRACMUX(0, "clk_uart2_frac", "clk_uart2_div", CLK_SET_RATE_PARENT,

	COMPOSITE_FRACMUX(0, "clk_uart2_frac", "clk_uart2_div", 0,

			RK3399_CLKSEL_CON(102), 0,

			RK3399_CLKGATE_CON(9), 5, GFLAGS,

			&rk3399_uart2_fracmux),
@@ -657,7 +664,7 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = { 
	COMPOSITE_NOMUX(0, "clk_uart3_div", "clk_uart_src", 0,

			RK3399_CLKSEL_CON(36), 0, 7, DFLAGS,

			RK3399_CLKGATE_CON(9), 6, GFLAGS),

	COMPOSITE_FRACMUX(0, "clk_uart3_frac", "clk_uart3_div", CLK_SET_RATE_PARENT,

	COMPOSITE_FRACMUX(0, "clk_uart3_frac", "clk_uart3_div", 0,

			RK3399_CLKSEL_CON(103), 0,

			RK3399_CLKGATE_CON(9), 7, GFLAGS,

			&rk3399_uart3_fracmux),
@@ -846,9 +853,9 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = { 
			RK3399_CLKSEL_CON(14), 12, 2, DFLAGS,

			RK3399_CLKGATE_CON(5), 4, GFLAGS),



	GATE(ACLK_PERF_PCIE, "aclk_perf_pcie", "aclk_perihp", CLK_IGNORE_UNUSED,

	GATE(ACLK_PERF_PCIE, "aclk_perf_pcie", "aclk_perihp", 0,

			RK3399_CLKGATE_CON(20), 2, GFLAGS),

	GATE(ACLK_PCIE, "aclk_pcie", "aclk_perihp", CLK_IGNORE_UNUSED,

	GATE(ACLK_PCIE, "aclk_pcie", "aclk_perihp", 0,

			RK3399_CLKGATE_CON(20), 10, GFLAGS),

	GATE(0, "aclk_perihp_noc", "aclk_perihp", CLK_IGNORE_UNUSED,

			RK3399_CLKGATE_CON(20), 12, GFLAGS),
@@ -1161,7 +1168,7 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = { 
			RK3399_CLKSEL_CON(49), 8, 2, MFLAGS, 0, 8, DFLAGS,

			RK3399_CLKGATE_CON(10), 12, GFLAGS),



	COMPOSITE_FRACMUX_NOGATE(0, "dclk_vop0_frac", "dclk_vop0_div", CLK_SET_RATE_PARENT,

	COMPOSITE_FRACMUX_NOGATE(DCLK_VOP0_FRAC, "dclk_vop0_frac", "dclk_vop0_div", 0,

			RK3399_CLKSEL_CON(106), 0,

			&rk3399_dclk_vop0_fracmux),
@@ -1191,7 +1198,7 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = { 
			RK3399_CLKSEL_CON(50), 8, 2, MFLAGS, 0, 8, DFLAGS,

			RK3399_CLKGATE_CON(10), 13, GFLAGS),



	COMPOSITE_FRACMUX_NOGATE(0, "dclk_vop1_frac", "dclk_vop1_div", CLK_SET_RATE_PARENT,

	COMPOSITE_FRACMUX_NOGATE(DCLK_VOP1_FRAC, "dclk_vop1_frac", "dclk_vop1_div", 0,

			RK3399_CLKSEL_CON(107), 0,

			&rk3399_dclk_vop1_fracmux),
@@ -1305,7 +1312,7 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = { 
	/* testout */

	MUX(0, "clk_test_pre", mux_pll_src_cpll_gpll_p, CLK_SET_RATE_PARENT,

			RK3399_CLKSEL_CON(58), 7, 1, MFLAGS),

	COMPOSITE_FRAC(0, "clk_test_frac", "clk_test_pre", CLK_SET_RATE_PARENT,

	COMPOSITE_FRAC(0, "clk_test_frac", "clk_test_pre", 0,

			RK3399_CLKSEL_CON(105), 0,

			RK3399_CLKGATE_CON(13), 9, GFLAGS),
@@ -1377,6 +1384,18 @@ static struct rockchip_clk_branch rk3399_clk_branches[] __initdata = { 
	COMPOSITE_NOMUX(0, "clk_test", "clk_test_pre", CLK_IGNORE_UNUSED,

			RK3368_CLKSEL_CON(58), 0, 5, DFLAGS,

			RK3368_CLKGATE_CON(13), 11, GFLAGS),



	/* ddrc */

	GATE(0, "clk_ddrc_lpll_src", "lpll", 0, RK3399_CLKGATE_CON(3),

	     0, GFLAGS),

	GATE(0, "clk_ddrc_bpll_src", "bpll", 0, RK3399_CLKGATE_CON(3),

	     1, GFLAGS),

	GATE(0, "clk_ddrc_dpll_src", "dpll", 0, RK3399_CLKGATE_CON(3),

	     2, GFLAGS),

	GATE(0, "clk_ddrc_gpll_src", "gpll", 0, RK3399_CLKGATE_CON(3),

	     3, GFLAGS),

	COMPOSITE_DDRCLK(SCLK_DDRC, "sclk_ddrc", mux_ddrclk_p, 0,

		       RK3399_CLKSEL_CON(6), 4, 2, 0, 0, ROCKCHIP_DDRCLK_SIP),

};



static struct rockchip_clk_branch rk3399_clk_pmu_branches[] __initdata = {
@@ -1398,7 +1417,7 @@ static struct rockchip_clk_branch rk3399_clk_pmu_branches[] __initdata = { 
			RK3399_PMU_CLKSEL_CON(1), 13, 1, MFLAGS, 8, 5, DFLAGS,

			RK3399_PMU_CLKGATE_CON(0), 8, GFLAGS),



	COMPOSITE_FRACMUX_NOGATE(0, "clk_wifi_frac", "clk_wifi_div", CLK_SET_RATE_PARENT,

	COMPOSITE_FRACMUX_NOGATE(0, "clk_wifi_frac", "clk_wifi_div", 0,

			RK3399_PMU_CLKSEL_CON(7), 0,

			&rk3399_pmuclk_wifi_fracmux),
@@ -1426,7 +1445,7 @@ static struct rockchip_clk_branch rk3399_clk_pmu_branches[] __initdata = { 
			RK3399_PMU_CLKSEL_CON(5), 10, 1, MFLAGS, 0, 7, DFLAGS,

			RK3399_PMU_CLKGATE_CON(0), 5, GFLAGS),



	COMPOSITE_FRACMUX(0, "clk_uart4_frac", "clk_uart4_div", CLK_SET_RATE_PARENT,

	COMPOSITE_FRACMUX(0, "clk_uart4_frac", "clk_uart4_div", 0,

			RK3399_PMU_CLKSEL_CON(6), 0,

			RK3399_PMU_CLKGATE_CON(0), 6, GFLAGS,

			&rk3399_uart4_pmu_fracmux),
@@ -1468,6 +1487,9 @@ static const char *const rk3399_cru_critical_clocks[] __initconst = { 
	"aclk_cci_pre",

	"aclk_gic",

	"aclk_gic_noc",

	"aclk_hdcp_noc",

	"hclk_hdcp_noc",

	"pclk_hdcp_noc",

	"pclk_perilp0",

	"pclk_perilp0",

	"hclk_perilp0",
@@ -1488,6 +1510,10 @@ static const char *const rk3399_cru_critical_clocks[] __initconst = { 
	"gpll_hclk_perilp1_src",

	"gpll_aclk_perilp0_src",

	"gpll_aclk_perihp_src",

	"aclk_vio_noc",



	/* ddrc */

	"sclk_ddrc"

};



static const char *const rk3399_pmucru_critical_clocks[] __initconst = {

drivers/clk/rockchip/clk-rockchip.c

+6 −1
Original line number Diff line number Diff line
@@ -49,14 +49,19 @@ static void __init rk2928_gate_clk_init(struct device_node *node) 
	}



	reg = of_iomap(node, 0);

	if (!reg)

		return;



	clk_data = kzalloc(sizeof(struct clk_onecell_data), GFP_KERNEL);

	if (!clk_data)

	if (!clk_data) {

		iounmap(reg);

		return;

	}



	clk_data->clks = kzalloc(qty * sizeof(struct clk *), GFP_KERNEL);

	if (!clk_data->clks) {

		kfree(clk_data);

		iounmap(reg);

		return;

	}